- play_arrow OSPF Overview
- play_arrow Understand OSPF Configurations
- play_arrow Configure OSPF Interfaces
- play_arrow Configure OSPF Areas
- play_arrow Configure OSPF Route Control
- play_arrow Configure OSPF Authentication
- play_arrow Configure OSPF Routing Instances
- play_arrow Configure OSPF Timers
- play_arrow Configure OSPF Fault Detection using BFD
- play_arrow Configure Graceful Restart for OSPF
- play_arrow Configure Loop-Free Alternate Routes for OSPF
- play_arrow Configure OSPF Support for Traffic Engineering
- Configuring OSPF Support for Traffic Engineering
- How to Configure Flexible Algorithms in OSPF for Segment Routing Traffic Engineering
- Configuring Application-Specific Link Attribute on an OSPF Interface
- How to Enable Link Delay Measurement and Advertising in OSPF
- How to Configure Microloop Avoidance in OSPFv2 Segment Routing Networks
- play_arrow Configure OSPF Database Protection
- play_arrow Configure OSPFv2 Sham Links
- play_arrow Configure OSPF on Logical Systems
- play_arrow Troubleshooting Network Issues
- play_arrow Verifying and Monitoring OSPF
- play_arrow Configuration Statements and Operational Commands
ON THIS PAGE
Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
Example: Configuring Backup Selection Policy for the OSPF or OSPF3 Protocol
Example: Configuring a Route Filter Policy to Specify Priority for Prefixes Learned Through OSPF
Example: Configuring an OSPF Export Policy for Network Summaries
Example: Configuring an OSPF Import Policy for Network Summaries
Configuring OSPF Routing Policy
Understanding Routing Policies
For some routing platform vendors, the flow of routes occurs between various protocols. If, for example, you want to configure redistribution from RIP to OSPF, the RIP process tells the OSPF process that it has routes that might be included for redistribution. In Junos OS, there is not much direct interaction between the routing protocols. Instead, there are central gathering points where all protocols install their routing information. These are the main unicast routing tables inet.0 and inet6.0.
From these tables, the routing protocols calculate the best route to each destination and place these routes in a forwarding table. These routes are then used to forward routing protocol traffic toward a destination, and they can be advertised to neighbors.
- Importing and Exporting Routes
- Active and Inactive Routes
- Explicitly Configured Routes
- Dynamic Database
Importing and Exporting Routes
Two terms—import and export—explain how routes move between the routing protocols and the routing table.
When the Routing Engine places the routes of a routing protocol into the routing table, it is importing routes into the routing table.
When the Routing Engine uses active routes from the routing table to send a protocol advertisement, it is exporting routes from the routing table.
Note:The process of moving routes between a routing protocol and the routing table is described always from the point of view of the routing table. That is, routes are imported into a routing table from a routing protocol and they are exported from a routing table to a routing protocol. Remember this distinction when working with routing policies.
As shown in Figure 1, you use import routing policies to control which routes are placed in the routing table, and export routing policies to control which routes are advertised from the routing table to neighbors.
In general, the routing protocols place all their routes in the routing table and advertise a limited set of routes from the routing table. The general rules for handling the routing information between the routing protocols and the routing table are known as the routing policy framework.
The routing policy framework is composed of default rules for each routing protocol that determine which routes the protocol places in the routing table and advertises from the routing table. The default rules for each routing protocol are known as default routing policies.
You can create routing policies to preempt the default policies, which are always present. A routing policy allows you to modify the routing policy framework to suit your needs. You can create and implement your own routing policies to do the following:
Control which routes a routing protocol places in the routing table.
Control which active routes a routing protocol advertises from the routing table. An active route is a route that is chosen from all routes in the routing table to reach a destination.
Manipulate the route characteristics as a routing protocol places the route in the routing table or advertises the route from the routing table.
You can manipulate the route characteristics to control which route is selected as the active route to reach a destination. The active route is placed in the forwarding table and is used to forward traffic toward the route’s destination. In general, the active route is also advertised to a router’s neighbors.
Active and Inactive Routes
When multiple routes for a destination exist in the routing table, the protocol selects an active route and that route is placed in the appropriate routing table. For equal-cost routes, the Junos OS places multiple next hops in the appropriate routing table.
When a protocol is exporting routes from the routing table, it exports active routes only. This applies to actions specified by both default and user-defined export policies.
When evaluating routes for export, the Routing Engine uses only active routes from the routing table. For example, if a routing table contains multiple routes to the same destination and one route has a preferable metric, only that route is evaluated. In other words, an export policy does not evaluate all routes; it evaluates only those routes that a routing protocol is allowed to advertise to a neighbor.
By default, BGP advertises active routes. However, you can configure BGP to advertise inactive routes, which go to the same destination as other routes but have less preferable metrics.
Explicitly Configured Routes
An explicitly configured route is a route that you have configured. Direct routes are not explicitly configured. They are created as a result of IP addresses being configured on an interface. Explicitly configured routes include aggregate, generated, local, and static routes. (An aggregate route is a route that distills groups of routes with common addresses into one route. A generated route is a route used when the routing table has no information about how to reach a particular destination. A local route is an IP address assigned to a router interface. A static route is an unchanging route to a destination.)
The policy framework software treats direct and explicitly configured routes as if they are learned through routing protocols; therefore, they can be imported into the routing table. Routes cannot be exported from the routing table to the pseudoprotocol, because this protocol is not a real routing protocol. However, aggregate, direct, generated, and static routes can be exported from the routing table to routing protocols, whereas local routes cannot.
Dynamic Database
In Junos OS Release 9.5 and later, you can configure routing policies and certain routing policy objects in a dynamic database that is not subject to the same verification required by the standard configuration database. As a result, you can quickly commit these routing policies and policy objects, which can be referenced and applied in the standard configuration as needed. BGP is the only protocol to which you can apply routing policies that reference policies configured in the dynamic database. After a routing policy based on the dynamic database is configured and committed in the standard configuration, you can quickly make changes to existing routing policies by modifying policy objects in the dynamic database. Because Junos OS does not validate configuration changes to the dynamic database, when you use this feature, you should test and verify all configuration changes before committing them.
See Also
Understanding OSPF Routing Policy
Each routing policy is identified by a policy name. The name can contain letters, numbers, and hyphens (-) and can be up to 255 characters long. To include spaces in the name, enclose the entire name in double quotation marks. Each routing policy name must be unique within a configuration. Once a policy is created and named, it must be applied before it is active.
In the import statement, you list the name of the routing policy used to filter
OSPF external routes from being installed into the routing tables of OSPF neighbors. You
can filter the routes, but not link-state address (LSA) flooding. An external route is a
route that is outside the OSPF Autonomous System (AS). The import policy does not impact
the OSPF database. This means that the import policy has no impact on the link-state
advertisements. The default import policy for OSPF is to accept all learned routes and
import them into the routing table.
In the export statement, you list the name of the routing policy to be
evaluated when routes are being exported from the routing table into OSPF. The default
export policy for OSPF is to reject everything, except LSA type1 and type 2. OSPF does
not actually export its internally learned routes (the directly connected routes on
interfaces that are running the protocol). OSPF uses link-state advertisement (LSA)
flooding to advertise both local routes and learned routes, and LSA flooding is not
affected by the export policy.
By default, if a routing device has multiple OSPF areas, learned routes from other areas are automatically installed into area 0 of the routing table.
To specify more than one policy and create a policy chain, you list the policies using a space as a separator. If multiple policies are specified, the policies are evaluated in the order in which they are specified. As soon as an accept or reject action is executed, the policy chain evaluation ends.
This topic describes the following information:
Routing Policy Terms
Routing policies are made up of one or more terms. A term is a named structure in which match conditions and actions are defined. You can define one or more terms. The name can contain letters, numbers, and hyphens ( - ) and can be up to 255 characters long. To include spaces in the name, enclose the entire name in double quotation marks.
Each term contains a set of match conditions and a set of actions:
Match conditions are criteria that a route must match before the actions can be applied. If a route matches all criteria, one or more actions are applied to the route.
Actions specify whether to accept or reject the route, control how a series of policies are evaluated, and manipulate the characteristics associated with a route.
Routing Policy Match Conditions
A match condition defines the criteria that a route must match for an action to take place. You can define one or more match conditions for each term. If a route matches all of the match conditions for a particular term, the actions defined for that term are processed.
Each term can include two statements, from and to, that define the match conditions:
In the
fromstatement, you define the criteria that an incoming route must match. You can specify one or more match conditions. If you specify more than one, they all must match the route for a match to occur.The
fromstatement is optional. If you omit thefromand thetostatements, all routes are considered to match.Note:In export policies, omitting the
fromstatement from a routing policy term might lead to unexpected results.In the
tostatement, you define the criteria that an outgoing route must match. You can specify one or more match conditions. If you specify more than one, they all must match the route for a match to occur.
The order of the match conditions in a term is not important because a route must match all match conditions in a term for an action to be taken.
For a complete list of match conditions, see Configuring Match Conditions in Routing Policy Terms.
Routing Policy Actions
An action defines what the routing device does with the route
when the route matches all the match conditions in the from and to statements for a particular term. If a term does
not have from and to statements, all routes
are considered to match and the actions apply to all routes.
Each term can have one or more of the following types of actions.
The actions are configured under the then statement.
Flow control actions, which affect whether to accept or reject the route and whether to evaluate the next term or routing policy.
Actions that manipulate route characteristics.
Trace action, which logs route matches.
The then statement is optional. If you omit it, one
of the following occurs:
The next term in the routing policy, if one exists, is evaluated.
If the routing policy has no more terms, the next routing policy, if one exists, is evaluated.
If there are no more terms or routing policies, the
acceptorrejectaction specified by the default policy is executed.
For a complete list of routing policy actions, see Configuring Actions in Routing Policy Terms.
Understanding Backup Selection Policy for OSPF Protocol
Support for OSPF loop-free alternate (LFA) routes essentially adds IP fast-reroute capability for OSPF. Junos OS precomputes multiple loop-free backup routes for all OSPF routes. These backup routes are pre-installed in the Packet Forwarding Engine, which performs a local repair and implements the backup path when the link for a primary next hop for a particular route is no longer available. The selection of LFA is done randomly by selecting any matching LFA to progress to the given destination. This does not ensure best backup coverage available for the network. In order to choose the best LFA, Junos OS allows you to configure network-wide backup selection policies for each destination (IPv4 and IPv6) and a primary next-hop interface. These policies are evaluated based on admin-group, srlg, bandwidth, protection-type, metric, and node information.
During backup shortest-path-first (SPF) computation, each node and link attribute of the backup path is accumulated by IGP and is associated with every node (router) in the topology. The next hop in the best backup path is selected as the backup next hop in the routing table. In general, backup evaluation policy rules are categorized into the following types:
Pruning — Rules configured to select the eligible backup path.
Ordering — Rules configured to select the best among the eligible backup paths.
The backup selection policies can be configured with both pruning and ordering rules. While evaluating the backup policies, each backup path is assigned a score, an integer value that signifies the total weight of the evaluated criteria. The backup path with the highest score is selected.
To enforce LFA selection, configure various rules for the following attributes:
admin-group– Administrative groups, also known as link coloring or resource class, are manually assigned attributes that describe the “color” of links, such that links with the same color conceptually belong to the same class. These configured administrative groups are defined under protocol MPLS. You can use administrative groups to implement a variety of backup selection policies using exclude, include-all, include-any, or preference.
srlg— A shared risk link group (SRLG) is a set of links sharing a common resource, which affects all links in the set if the common resource fails. These links share the same risk of failure and are therefore considered to belong to the same SRLG. For example, links sharing a common fiber are said to be in the same SRLG because a fault with the fiber might cause all links in the group to fail. An SRLG is represented by a 32-bit number unique within an IGP (OSPF) domain. A link might belong to multiple SRLGs. You can define the backup selection to either allow or reject the common SRLGs between the primary and the backup path. This rejection of common SRLGs are based on the non-existence of link having common SRLGs in the primary next-hop and the backup SPF.
Note:Administrative groups and SRLGs can be created only for default topologies.
bandwidth—The bandwidth specifies the bandwidth constraints between the primary and the backup path. The backup next-hop link can be used only if the bandwidth of the backup next-hop interface is greater than or equal to the bandwidth of the primary next hop.
protection-type— The protection-type protects the destination from node failure of the primary node or link failure of the primary link. You can configure node, link, or node-link to protect the destination. If link-node is configured , then the node-protecting LFA is preferred over link-protection LFA.
node- The node is per-node policy information. Here, node can be a directly connected router, remote router like RSVP backup LSP tail-end, or any other router in the backup SPF path. The nodes are identified through the route-id advertised by a node in the LSP. You can list the nodes to either prefer or exclude them in the backup path.
metric— Metric decides how the LFAs should be preferred. In backup selection path, root metric and dest-metric are the two types of metrics. root-metric indicates the metric to the one-hop neighbor or a remote router such as an RSVP backup LSP tail-end router. The dest-metric indicates the metric from a one-hop neighbor or remote router such as an RSVP backup LSP tail-end router to the final destination. The metric evaluation is done either in ascending or descending order. By default, the first preference is given to backup paths with lowest destination evaluation and then to backup paths with lowest root metrics.
The evaluation-order allows you to control the order and criteria of evaluating these attributes in the backup path. You can explicitly configure the evaluation order. Only the configured attributes influence the backup path selection. The default order of evaluation of these attributes for the LFA is [ admin-group srlg bandwidth protection-type node metric ] .
TE attributes are not supported in OSPFv3 and cannot be used for backup selection policy evaluation for IPv6 prefixes.
See Also
Configuring Backup Selection Policy for the OSPF Protocol
Support for OSPF loop-free alternate (LFA) routes essentially adds IP fast-reroute capability for OSPF. Junos OS precomputes multiple loop-free backup routes for all OSPF routes. These backup routes are pre-installed in the Packet Forwarding Engine, which performs a local repair and implements the backup path when the link for a primary next hop for a particular route is no longer available. The selection of LFA is done randomly by selecting any matching LFA to progress to the given destination. This does not ensure best backup coverage available for the network. In order to choose the best LFA, Junos OS allows you to configure network-wide backup selection policies for each destination (IPv4 and IPv6) and a primary next-hop interface. These policies are evaluated based on admin-group, srlg, bandwidth, protection-type, metric, and node information.
Before you begin to configure the backup selection policy for the OSPF protocol:
Configure the router interfaces. See the Junos OS Network Management Administration Guide for Routing Devices.
Configure an interior gateway protocol or static routing. See the Junos OS Routing Protocols Library for Routing Devices.
To configure the backup selection policy for the OSPF protocol:
See Also
Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
- Understanding Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
- Configuring Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
Understanding Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
Segment routing enables a router to send a packet along a specific path in the network by imposing a label stack that describes the path. The forwarding actions described by a segment routing label stack do not need to be established on a per-path basis. Therefore, an ingress router can instantiate an arbitrary path using a segment routing label stack and use it immediately without any signaling.
In segment routing, each node advertises mappings between incoming labels and forwarding actions. A specific forwarding action is referred to as a segment and the label that identifies that segment is referred to as a segment identifier (SID). The backup paths created by TI-LFA use the following types of segments:
Node segment—A node segment forwards packets along the shortest path or paths to a destination node. The label representing the node segment (the node SID) is swapped until the destination node is reached.
Adjacency segment—An adjacency segment forwards packets across a specific interface on the node that advertised the adjacency segment. The label representing an adjacency segment (the adjacency SID) is popped by the node that advertised it.
A router can send a packet along a specific path by creating a label stack that uses a combination of node SIDs and adjacency SIDs. Typically, node SIDs are used to represent parts of the path that correspond to the shortest path between two nodes. An adjacency SID is used wherever a node SID cannot be used to accurately represent the desired path.
When used with OSPF, TI-LFA provides protection against link failure, node failure., fate-sharing failures, and shared risk link group failures. In link failure mode, the destination is protected if the link fails. In node protection mode, the destination is protected if the neighbor connected to the primary link fails. To determine the node-protecting post-convergence path, the cost of all the links leaving the neighbor is assumed to increase by a configurable amount.
Starting in Junos OS Release 20.3R1, you can configure fate-sharing protection in TI-LFA networks for segment routing to choose a fast reroute path that does not include fate-sharing groups in the topology-independent loop-free alternate (TI-LFA) backup paths to avoid fate-sharing failures. With fate-sharing protection, a list of fate-sharing groups are configured on each PLR with the links in each fate-sharing group identified by their respective IP addresses. The PLR associates a cost with each fate-sharing group. The fate-sharing-aware post-convergence path is computed by assuming that the cost of each link in the same fate-sharing group as the failed link has increased the cost associated with that group.
Starting in Junos OS Release 20.3R1, you can configure Shared Risk Link Group (SRLG) protection in TI-LFA networks for segment routing to choose a fast reroute path that does not include SRLG links in the topology-independent loop-free alternate (TI-LFA) backup paths. SRLGs share a common fibre and they also share the risks of a broken link. When one link in an SRLG fails, other links in the group might also fail. Therefore, you need to avoid links that share the same risk as the protected link in the backup path. Configuring SRLG protection prevents TI-LFA from selecting backup paths that include a shared risk link. If you have configured SRLG protection then OSPFv2 computes the fast reroute path that is aligned with the post convergence path and excludes the links that belong to the SRLG of the protected link. All local and remote links that are from the same SRLG as the protected link are excluded from the TI-LFA back up path. The point of local repair (PLR) sets up the label stack for the fast reroute path with a different outgoing interface. Currently you cannot enable SRLG protection in IPv6 networks and in networks with multitopology.
In order to construct a backup path that follows the post-convergence path, TI-LFA can use several labels in the label stack that define the backup path. If the number of labels required to construct a particular post-convergence backup path exceeds a certain amount, it is useful in some circumstances to not install that backup path. You can configure the maximum number of labels that a backup path can have in order to be installed. The default value is 3, with a range of 2 through 5.
It is often the case that the post-convergence path for a given failure is actually a set of equal-cost paths. TI-LFA attempts to construct the backup paths to a given destination using multiple equal-cost paths in the post-failure topology. Depending on the topology, TI-LFA might need to use different label stacks to accurately construct those equal-cost backup paths. By default, TI-LFA only installs one backup path for a given destination. However, you can configure the value in the range from 1 through 8.
Benefits of Using Topology-Independent Loop-Free Alternate with Segment Routing
Loop-free alternate (LFA) and remote LFA (RLFA) have been used to provide fast-reroute protection for several years. With LFA, a point of local repair (PLR) determines whether or not a packet sent to one of its direct neighbors reaches its destination without looping back through the PLR. In a typical network topology, approximately 40 to 60 percent of the destinations can be protected by LFA. Remote LFA expands on the concept of LFA by allowing the PLR to impose a single label to tunnel the packet to a repair tunnel endpoint from which the packet can reach its destination without looping back through the PLR. Using remote LFA, more destinations can be protected by the PLR compared to LFA. However, depending on the network topology, the percentage of destinations protected by remote LFA is usually less than 100 percent.
Topology-independent LFA (TI-LFA) extends the concept of LFA and remote LFA by allowing the PLR to use deeper label stacks to construct backup paths. In addition, TI-LFA imposes the constraint that the backup path used by the PLR be the same path that a packet takes once the interior gateway protocol (IGP) has converged for a given failure scenario. This path is referred to as the post-convergence path.
Using the post-convergence path as the backup path has some desirable characteristics. For some topologies, a network operator only needs to make sure that the network has enough capacity to carry the traffic along the post-convergence path after a failure. In these cases, a network operator does not need to allocate additional capacity to deal with the traffic pattern immediately after the failure while the backup path is active, because the backup path follows the post-convergence path.
When used with OSPF, TI-LFA provides protection against link failure and node failure.
Configuring Topology-Independent Loop-Free Alternate with Segment Routing for OSPF
Before you configure TI-LFA for OSPF, be sure you configure SPRING or segment routing.
Starting in Junos OS Release 19.3R1, Junos supports creation of OSPF topology-independent TI-LFA backup paths where the prefix SID is learned from a segment routing mapping server advertisement when the PLR and mapping server are both in the same OSPF area.
To configure TI-LFA using SPRING for OSPF, you must do the following:
Example: Configuring Backup Selection Policy for the OSPF or OSPF3 Protocol
This example shows how to configure the backup selection policy for the OSPF or OSPF3 protocol, which enables you to select a loop-free alternate (LFA) in the network.
When you enable backup selection policies, Junos OS allows selection of LFA based on the policy rules and attributes of the links and nodes in the network. These attributes are admin-group, srlg, bandwidth, protection-type, metric, and node.
Requirements
This example uses the following hardware and software components:
Eight routers that can be a combination of M Series Multiservice Edge Routers, MX Series 5G Universal Routing Platforms, PTX Series Packet Transport Routers, and T Series Core Routers
Junos OS Release 15.1 or later running on all devices
Before you begin:
Configure the device interfaces.
Configure OSPF.
Overview
In Junos OS, the default loop-free alternative (LFA) selection
algorithm or criteria can be overridden with an LFA policy. These
policies are configured for each destination (IPv4 and IPv6) and a
primary next-hop interface . These backup policies enforce LFA selection
based on admin-group, srlg, bandwidth, protection-type, metric, and
node attributes of the backup path. During backup shortest-path-first
(SPF) computation, each attribute (both node and link) of the backup
path, stored per backup next-hop, is accumulated by IGP. For the routes
created internally by IGP, the attribute set of every backup path
is evaluated against the policy configured for each destination (IPv4
and IPv6) and a primary next-hop interface. The first or the best
backup path is selected and installed as the backup next hop in the
routing table. To configure the backup selection policy, include the backup-selection configuration statement at the [edit
routing-options] hierarchy level. The show backup-selection command displays the configured policies for a given interface and
destination. The display can be filtered against a particular destination,
prefix, interface, or logical systems.
Topology
In this topology shown in Figure 2, the backup selection policy is configured on Device R3.
Configuration
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy
level, and then enter commit from configuration mode.
R0
set interfaces ge-0/0/0 unit 0 family inet address 10.1.1.1/30 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8:10:1:1::1/64 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/1/0 unit 0 family inet address 172.16.15.1/30 set interfaces ge-0/1/0 unit 0 family inet6 address 2001:db8:15:1:1::1/64 set interfaces ge-0/1/0 unit 0 family mpls set interfaces xe-0/2/0 unit 0 family inet address 172.16.20.1/30 set interfaces xe-0/2/0 unit 0 family inet6 address 2001:db8:20:1:1::1/64 set interfaces xe-0/2/0 unit 0 family mpls set interfaces ge-1/0/5 unit 0 family inet address 172.16.150.1/24 set interfaces ge-1/0/5 unit 0 family inet6 address 2001:db8:150:1:1::1/64 set interfaces ge-1/0/5 unit 0 family mpls set interfaces ge-1/1/1 unit 0 family inet address 172.16.30.1/30 set interfaces ge-1/1/1 unit 0 family inet6 address 2001:db8:30:1:1::1/64 set interfaces ge-1/1/1 unit 0 family mpls set interfaces xe-1/3/0 unit 0 family inet address 172.16.25.1/30 set interfaces xe-1/3/0 unit 0 family inet6 address 2001:db8:25:1:1::1/64 set interfaces xe-1/3/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.10.10.10/32 primary set interfaces lo0 unit 0 family inet6 address 2001:db8::10:10:10:10/128 primary set interfaces lo0 unit 0 family mpls set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 10.10.10.10 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-0/1/0.0 metric 18 set protocols ospf area 0.0.0.0 interface xe-0/2/0.0 metric 51 set protocols ospf area 0.0.0.0 interface ge-1/1/1.0 metric 23 set protocols ospf area 0.0.0.0 interface xe-1/3/0.0 metric 52 set protocols ospf area 0.0.0.0 interface ge-1/0/5.0 set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/1/0.0 metric 18 set protocols ospf3 area 0.0.0.0 interface xe-0/2/0.0 metric 51 set protocols ospf3 area 0.0.0.0 interface ge-1/1/1.0 metric 23 set protocols ospf3 area 0.0.0.0 interface xe-1/3/0.0 metric 52 set protocols ospf3 area 0.0.0.0 interface ge-1/0/5.0
R1
set interfaces ge-0/0/0 unit 0 family inet address 10.1.1.2/30 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8:10:1:1::2/64 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/5 unit 0 family inet address 172.16.35.1/30 set interfaces ge-0/0/5 unit 0 family inet6 address 2001:db8:35:1:1::1/64 set interfaces ge-0/0/5 unit 0 family mpls set interfaces xe-0/2/0 unit 0 family inet address 172.16.40.1/30 set interfaces xe-0/2/0 unit 0 family inet6 address 2001:db8:40:1:1::1/64 set interfaces xe-0/2/0 unit 0 family mpls set interfaces xe-0/3/0 unit 0 family inet address 172.16.45.1/30 set interfaces xe-0/3/0 unit 0 family inet6 address 2001:db8:45:1:1::1/64 set interfaces xe-0/3/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 172.16.1.1/32 primary set interfaces lo0 unit 0 family inet6 address 2001:db8::1:1:1:1/128 primary set interfaces lo0 unit 0 family mpls set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.1.1 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols mpls interface ge-0/0/0.0 srlg srlg9 set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-0/0/5.0 metric 10 set protocols ospf area 0.0.0.0 interface xe-0/2/0.0 metric 10 set protocols ospf area 0.0.0.0 interface xe-0/3/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/0/5.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/2/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/3/0.0 metric 10
R2
set interfaces ge-0/0/2 unit 0 family inet address 172.16.35.2/30 set interfaces ge-0/0/2 unit 0 family inet6 address 2001:db8:35:1:1::2/64 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/1/0 unit 0 family inet address 172.16.50.1/30 set interfaces ge-0/1/0 unit 0 family inet6 address 2001:db8:50:1:1::1/64 set interfaces ge-0/1/0 unit 0 family mpls set interfaces xe-0/2/1 unit 0 family inet address 172.16.55.1/30 set interfaces xe-0/2/1 unit 0 family inet6 address 2001:db8:55:1:1::1/64 set interfaces xe-0/2/1 unit 0 family mpls set interfaces ge-1/0/2 unit 0 family inet address 172.16.60.1/30 set interfaces ge-1/0/2 unit 0 family inet6 address 2001:db8:60:1:1::1/64 set interfaces ge-1/0/2 unit 0 family mpls set interfaces ge-1/0/9 unit 0 family inet address 172.16.65.1/30 set interfaces ge-1/0/9 unit 0 family inet6 address 2001:db8:65:1:1::1/64 set interfaces ge-1/0/9 unit 0 family mpls set interfaces ge-1/1/5 unit 0 family inet address 172.16.70.1/30 set interfaces ge-1/1/5 unit 0 family inet6 address 2001:db8:70:1:1::1/64 set interfaces ge-1/1/5 unit 0 family mpls set interfaces lo0 unit 0 family inet address 172.16.2.2/32 primary set interfaces lo0 unit 0 family inet6 address 2001:db8::2:2:2:2/128 primary set interfaces lo0 unit 0 family mpls set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.2.2 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols mpls interface ge-0/1/0.0 srlg srlg1 set protocols mpls interface ge-1/0/9.0 srlg srlg1 set protocols mpls interface ge-1/1/5.0 srlg srlg7 set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-0/1/0.0 link-protection set protocols ospf area 0.0.0.0 interface xe-0/2/1.0 metric 12 set protocols ospf area 0.0.0.0 interface ge-1/0/2.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-1/0/9.0 metric 12 set protocols ospf area 0.0.0.0 interface ge-1/1/5.0 metric 13 set protocols ospf3 area 0.0.0.0 interface ge-0/0/2.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/1/0.0 link-protection set protocols ospf3 area 0.0.0.0 interface xe-0/2/1.0 metric 12 set protocols ospf3 area 0.0.0.0 interface ge-1/0/2.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-1/0/9.0 metric 12 set protocols ospf3 area 0.0.0.0 interface ge-1/1/5.0 metric 13
R3
set interfaces ge-0/0/5 unit 0 family inet address 172.16.50.2/30 set interfaces ge-0/0/5 unit 0 family inet6 address 2001:db8:50:1:1::2/64 set interfaces ge-0/0/5 unit 0 family mpls set interfaces xe-0/3/1 unit 0 family inet address 172.16.75.1/30 set interfaces xe-0/3/1 unit 0 family inet6 address 2001:db8:75:1:1::1/64 set interfaces xe-0/3/1 unit 0 family mpls set interfaces ge-1/0/0 unit 0 family inet address 172.16.80.1/30 set interfaces ge-1/0/0 unit 0 family inet6 address 2001:db8:80:1:1::1/64 set interfaces ge-1/0/0 unit 0 family mpls set interfaces ge-1/0/5 unit 0 family inet address 172.16.200.1/24 set interfaces ge-1/0/5 unit 0 family inet6 address 2001:db8:200:1:1::1/64 set interfaces ge-1/0/6 unit 0 family inet address 172.16.85.1/30 set interfaces ge-1/0/6 unit 0 family inet6 address 2001:db8:85:1:1::1/64 set interfaces ge-1/0/6 unit 0 family mpls set interfaces xe-1/3/0 unit 0 family inet address 172.16.90.1/30 set interfaces xe-1/3/0 unit 0 family inet6 address 2001:db8:90:1:1::1/64 set interfaces xe-1/3/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 172.16.3.3/32 primary set interfaces lo0 unit 0 family inet6 address 2001:db8::3:3:3:3/128 primary set interfaces lo0 unit 0 family mpls set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.3.3 set routing-options forwarding-table export ecmp set routing-options backup-selection destination 10.1.1.0/30 interface xe-1/3/0.0 admin-group include-all c2 set routing-options backup-selection destination 10.1.1.0/30 interface all admin-group exclude c3 set routing-options backup-selection destination 10.1.1.0/30 interface all srlg strict set routing-options backup-selection destination 10.1.1.0/30 interface all protection-type node set routing-options backup-selection destination 10.1.1.0/30 interface all bandwidth-greater-equal-primary set routing-options backup-selection destination 10.1.1.0/30 interface all neighbor preference 172.16.7.7 set routing-options backup-selection destination 10.1.1.0/30 interface all root-metric lowest set routing-options backup-selection destination 10.1.1.0/30 interface all metric-order root set routing-options backup-selection destination 172.16.30.0/30 interface all admin-group exclude c5 set routing-options backup-selection destination 172.16.30.0/30 interface all srlg strict set routing-options backup-selection destination 172.16.30.0/30 interface all protection-type node set routing-options backup-selection destination 172.16.30.0/30 interface all bandwidth-greater-equal-primary set routing-options backup-selection destination 172.16.30.0/30 interface all neighbor preference 172.16.7.7 set routing-options backup-selection destination 172.16.30.0/30 interface all root-metric lowest set routing-options backup-selection destination 172.16.30.0/30 interface all metric-order root set routing-options backup-selection destination 172.16.45.0/30 interface all admin-group exclude c5 set routing-options backup-selection destination 172.16.45.0/30 interface all srlg strict set routing-options backup-selection destination 172.16.45.0/30 interface all protection-type node set routing-options backup-selection destination 172.16.45.0/30 interface all bandwidth-greater-equal-primary set routing-options backup-selection destination 172.16.45.0/30 interface all neighbor preference 172.16.7.7 set routing-options backup-selection destination 172.16.45.0/30 interface all root-metric lowest set routing-options backup-selection destination 172.16.45.1/30 interface all metric-order root set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols mpls interface ge-0/0/5.0 admin-group c0 set protocols ospf area 0.0.0.0 interface ge-0/0/5.0 link-protection set protocols ospf area 0.0.0.0 interface ge-0/0/5.0 metric 10 set protocols ospf area 0.0.0.0 interface xe-0/3/1.0 metric 21 set protocols ospf area 0.0.0.0 interface ge-1/0/0.0 metric 13 set protocols ospf area 0.0.0.0 interface ge-1/0/6.0 metric 15 set protocols ospf area 0.0.0.0 interface xe-1/3/0.0 link-protection set protocols ospf area 0.0.0.0 interface xe-1/3/0.0 metric 22 set protocols ospf3 area 0.0.0.0 interface ge-0/0/5.0 link-protection set protocols ospf3 area 0.0.0.0 interface ge-0/0/5.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/3/1.0 metric 21 set protocols ospf3 area 0.0.0.0 interface ge-1/0/0.0 metric 13 set protocols ospf3 area 0.0.0.0 interface ge-1/0/6.0 metric 15 set protocols ospf3 area 0.0.0.0 interface xe-1/3/0.0 link-protection set protocols ospf3 area 0.0.0.0 interface xe-1/3/0.0 metric 22 set policy-options policy-statement ecmp term 1 then load-balance per-packet
R4
set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.4.4 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols ospf area 0.0.0.0 interface ge-0/1/0.0 metric 18 set protocols ospf area 0.0.0.0 interface xe-0/2/0.0 metric 10 set protocols ospf area 0.0.0.0 interface xe-1/3/0.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-1/1/0.0 metric 10 set protocols ospf area 0.0.0.0 interface xe-0/3/1.0 metric 21 set protocols ospf3 area 0.0.0.0 interface ge-0/1/0.0 metric 18 set protocols ospf3 area 0.0.0.0 interface xe-0/2/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-1/3/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-1/1/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/3/1.0 metric 21
R5
set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.5.5 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols ospf area 0.0.0.0 interface xe-0/2/0.0 metric 51 set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-0/0/5.0 metric 13 set protocols ospf area 0.0.0.0 interface ge-0/1/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/2/0.0 metric 51 set protocols ospf3 area 0.0.0.0 interface ge-0/0/1.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/0/5.0 metric 13 set protocols ospf3 area 0.0.0.0 interface ge-0/1/0.0 metric 10
R6
set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.6.6 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 25 set protocols mpls admin-groups c26 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols ospf area 0.0.0.0 interface xe-0/3/0.0 metric 52 set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 metric 12 set protocols ospf area 0.0.0.0 interface ge-0/0/4.0 metric 15 set protocols ospf area 0.0.0.0 interface xe-0/2/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface xe-0/3/0.0 metric 52 set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 12 set protocols ospf3 area 0.0.0.0 interface ge-0/0/4.0 metric 15 set protocols ospf3 area 0.0.0.0 interface xe-0/2/0.0 metric 10
R7
set routing-options srlg srlg1 srlg-value 1001 set routing-options srlg srlg2 srlg-value 1002 set routing-options srlg srlg3 srlg-value 1003 set routing-options srlg srlg4 srlg-value 1004 set routing-options srlg srlg5 srlg-value 1005 set routing-options srlg srlg6 srlg-value 1006 set routing-options srlg srlg7 srlg-value 1007 set routing-options srlg srlg8 srlg-value 1008 set routing-options srlg srlg9 srlg-value 1009 set routing-options srlg srlg10 srlg-value 10010 set routing-options srlg srlg11 srlg-value 10011 set routing-options srlg srlg12 srlg-value 10012 set routing-options router-id 172.16.7.7 set protocols rsvp interface all set protocols mpls admin-groups c0 0 set protocols mpls admin-groups c1 1 set protocols mpls admin-groups c2 2 set protocols mpls admin-groups c3 3 set protocols mpls admin-groups c4 4 set protocols mpls admin-groups c5 5 set protocols mpls admin-groups c6 6 set protocols mpls admin-groups c7 7 set protocols mpls admin-groups c8 8 set protocols mpls admin-groups c9 9 set protocols mpls admin-groups c10 10 set protocols mpls admin-groups c11 11 set protocols mpls admin-groups c12 12 set protocols mpls admin-groups c13 13 set protocols mpls admin-groups c14 14 set protocols mpls admin-groups c15 15 set protocols mpls admin-groups c16 16 set protocols mpls admin-groups c17 17 set protocols mpls admin-groups c18 18 set protocols mpls admin-groups c19 19 set protocols mpls admin-groups c20 20 set protocols mpls admin-groups c21 21 set protocols mpls admin-groups c22 22 set protocols mpls admin-groups c23 23 set protocols mpls admin-groups c24 24 set protocols mpls admin-groups c25 26 set protocols mpls admin-groups c27 27 set protocols mpls admin-groups c28 28 set protocols mpls admin-groups c29 29 set protocols mpls admin-groups c30 30 set protocols mpls admin-groups c31 31 set protocols mpls interface all set protocols mpls interface xe-0/3/0.0 srlg srlg8 set protocols ospf area 0.0.0.0 interface ge-0/1/5.0 metric 23 set protocols ospf area 0.0.0.0 interface xe-0/3/0.0 metric 10 set protocols ospf area 0.0.0.0 interface ge-1/0/0.0 metric 13 set protocols ospf area 0.0.0.0 interface xe-1/3/0.0 metric 22 set protocols ospf area 0.0.0.0 interface xe-1/2/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-0/1/5.0 metric 23 set protocols ospf3 area 0.0.0.0 interface xe-0/3/0.0 metric 10 set protocols ospf3 area 0.0.0.0 interface ge-1/0/0.0 metric 13 set protocols ospf3 area 0.0.0.0 interface xe-1/3/0.0 metric 22 set protocols ospf3 area 0.0.0.0 interface xe-1/2/0.0 metric 10
Configuring Device R3
Step-by-Step Procedure
The following example requires that you navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To configure Device R3:
Configure the interfaces.
content_copy zoom_out_map[edit interfaces] user@R3# set ge-0/0/5 unit 0 family inet address 172.16.50.2/30 user@R3# set ge-0/0/5 unit 0 family inet6 address 2001:db8:50:1:1::2/64 user@R3# set ge-0/0/5 unit 0 family mpls user@R3# set xe-0/3/1 unit 0 family inet address 172.16.75.1/30 user@R3# set xe-0/3/1 unit 0 family inet6 address 2001:db8:75:1:1::1/64 user@R3# set xe-0/3/1 unit 0 family mpls user@R3# set ge-1/0/0 unit 0 family inet address 172.16.80.1/30 user@R3# set ge-1/0/0 unit 0 family inet6 address 2001:db8:80:1:1::1/64 user@R3# set ge-1/0/0 unit 0 family mpls user@R3# set ge-1/0/5 unit 0 family inet address 172.16.200.1/24 user@R3# set ge-1/0/5 unit 0 family inet6 address 2001:db8:200:1:1::1/64 user@R3# set ge-1/0/6 unit 0 family inet address 172.16.85.1/30 user@R3# set ge-1/0/6 unit 0 family inet6 address 2001:db8:85:1:1::1/64 user@R3# set ge-1/0/6 unit 0 family mpls user@R3# set xe-1/3/0 unit 0 family inet address 172.16.90.1/30 user@R3# set xe-1/3/0 unit 0 family inet6 address 2001:db8:90:1:1::1/64 user@R3# set xe-1/3/0 unit 0 family mpls user@R3# set lo0 unit 0 family inet address 172.16.3.3/32 primary user@R3# set lo0 unit 0 family inet6 address 2001:db8::3:3:3:3/128 primary user@R3# set lo0 unit 0 family mpls
Configure srlg values.
content_copy zoom_out_map[edit routing-options] user@R3# set srlg srlg1 srlg-value 1001 user@R3# set srlg srlg2 srlg-value 1002 user@R3# set srlg srlg3 srlg-value 1003 user@R3# set srlg srlg4 srlg-value 1004 user@R3# set srlg srlg5 srlg-value 1005 user@R3# set srlg srlg6 srlg-value 1006 user@R3# set srlg srlg7 srlg-value 1007 user@R3# set srlg srlg8 srlg-value 1008 user@R3# set srlg srlg9 srlg-value 1009 user@R3# set srlg srlg10 srlg-value 10010 user@R3# set srlg srlg11 srlg-value 10011 user@R3# set srlg srlg12 srlg-value 10012
Configure the ID of the router.
content_copy zoom_out_map[edit routing-options] user@R3# set router-id 172.16.3.3
Apply the routing policy to all equal-cost multipaths exported from the routing table to the forwarding table.
content_copy zoom_out_map[edit routing-options] user@R3# set forwarding-table export ecmp
Configure attributes of the backup selection policy.
content_copy zoom_out_map[edit routing-options backup-selection] user@R3# set destination 10.1.1.0/30 interface xe-1/3/0.0 admin-group include-all c2 user@R3# set destination 10.1.1.0/30 interface all admin-group exclude c3 user@R3# set destination 10.1.1.0/30 interface all srlg strict user@R3# set destination 10.1.1.0/30 interface all protection-type node user@R3# set destination 10.1.1.0/30 interface all bandwidth-greater-equal-primary user@R3# set destination 10.1.1.0/30 interface all neighbor preference 172.16.7.7 user@R3# set destination 10.1.1.0/30 interface all root-metric lowest user@R3# set destination 10.1.1.0/30 interface all metric-order root user@R3# set destination 172.16.30.0/30 interface all admin-group exclude c5 user@R3# set destination 172.16.30.0/30 interface all srlg strict user@R3# set destination 172.16.30.0/30 interface all protection-type node user@R3# set destination 172.16.30.0/30 interface all bandwidth-greater-equal-primary user@R3# set destination 172.16.30.0/30 interface all neighbor preference 172.16.7.7 user@R3# set destination 172.16.30.0/30 interface all root-metric lowest user@R3# set destination 172.16.30.0/30 interface all metric-order root user@R3# set destination 192.168.45.0/30 interface all admin-group exclude c5 user@R3# set destination 192.168.45.0/30 interface all srlg strict user@R3# set destination 192.168.45.0/30 interface all protection-type node user@R3# set destination 192.168.45.0/30 interface all bandwidth-greater-equal-primary user@R3# set destination 192.168.45.0/30 interface all neighbor preference 172.16.7.7 user@R3# set destination 192.168.45.0/30 interface all root-metric lowest user@R3# set destination 192.168.45.0/30 interface all metric-order root
Enable RSVP on all the interfaces.
content_copy zoom_out_map[edit protocols] user@R3# set rsvp interface all
Configure administrative groups.
content_copy zoom_out_map[edit protocols mpls] user@R3# set admin-groups c0 0 user@R3# set admin-groups c1 1 user@R3# set admin-groups c2 2 user@R3# set admin-groups c3 3 user@R3# set admin-groups c4 4 user@R3# set admin-groups c5 5 user@R3# set admin-groups c6 6 user@R3# set admin-groups c7 7 user@R3# set admin-groups c8 8 user@R3# set admin-groups c9 9 user@R3# set admin-groups c10 10 user@R3# set admin-groups c11 11 user@R3# set admin-groups c12 12 user@R3# set admin-groups c13 13 user@R3# set admin-groups c14 14 user@R3# set admin-groups c15 15 user@R3# set admin-groups c16 16 user@R3# set admin-groups c17 17 user@R3# set admin-groups c18 18 user@R3# set admin-groups c19 19 user@R3# set admin-groups c20 20 user@R3# set admin-groups c21 21 user@R3# set admin-groups c22 22 user@R3# set admin-groups c23 23 user@R3# set admin-groups c24 24 user@R3# set admin-groups c25 25 user@R3# set admin-groups c26 26 user@R3# set admin-groups c27 27 user@R3# set admin-groups c28 28 user@R3# set admin-groups c29 29 user@R3# set admin-groups c30 30 user@R3# set admin-groups c31 31
Enable MPLS on all the interfaces and configure administrative group for an interface.
content_copy zoom_out_map[edit protocols mpls] user@R3# set interface all user@R3# set interface ge-0/0/5.0 admin-group c0
Enable link protection and configure metric values on all the interfaces for an OSPF area.
content_copy zoom_out_map[edit protocols ospf] user@R3# set area 0.0.0.0 interface ge-0/0/5.0 link-protection user@R3# set area 0.0.0.0 interface ge-0/0/5.0 metric 10 user@R3# set area 0.0.0.0 interface xe-0/3/1.0 metric 21 user@R3# set area 0.0.0.0 interface ge-1/0/0.0 metric 13 user@R3# set area 0.0.0.0 interface ge-1/0/6.0 metric 15 user@R3# set area 0.0.0.0 interface xe-1/3/0.0 link-protection user@R3# set area 0.0.0.0 interface xe-1/3/0.0 metric 22
Enable link protection and configure metric values on all the interfaces for an OSPF3 area.
content_copy zoom_out_map[edit protocols ospf3] user@R3# set area 0.0.0.0 interface ge-0/0/5.0 link-protection user@R3# set area 0.0.0.0 interface ge-0/0/5.0 metric 10 user@R3# set area 0.0.0.0 interface xe-0/3/1.0 metric 21 user@R3# set area 0.0.0.0 interface ge-1/0/0.0 metric 13 user@R3# set area 0.0.0.0 interface ge-1/0/6.0 metric 15 user@R3# set area 0.0.0.0 interface xe-1/3/0.0 link-protection user@R3# set area 0.0.0.0 interface xe-1/3/0.0 metric 22
Configure the routing policy.
content_copy zoom_out_map[edit policy-options] user@R3# set policy-statement ecmp term 1 then load-balance per-packet
Results
From configuration mode, confirm your configuration
by entering the show interfaces, show protocols, show policy-options, and show routing-options commands. If the output does not display the intended configuration,
repeat the instructions in this example to correct the configuration.
user@R3# show interfaces
ge-0/0/5 {
unit 0 {
family inet {
address 192.168.50.2/30;
}
family inet6 {
address 2001:db8:50:1:1::2/64;
}
family mpls;
}
}
xe-0/3/1 {
unit 0 {
family inet {
address 192.168.75.1/30;
}
family inet6 {
address 2001:db8:75:1:1::1/64;
}
family mpls;
}
}
ge-1/0/0 {
unit 0 {
family inet {
address 192.168.80.1/30;
}
family inet6 {
address 2001:db8:80:1:1::1/64;
}
family mpls;
}
}
ge-1/0/5 {
unit 0 {
family inet {
address 172.16.200.1/24;
}
family inet6 {
address 2001:db8:200:1:1::1/64;
}
}
}
ge-1/0/6 {
unit 0 {
family inet {
address 192.168.85.1/30;
}
family inet6 {
address 2001:db8:85:1:1::1/64;
}
family mpls;
}
}
xe-1/3/0 {
unit 0 {
family inet {
address 192.168.90.1/30;
}
family inet6 {
address 2001:db8:90:1:1::1/64;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 172.16.3.3/32 {
primary;
}
}
family inet6 {
address 2001:db8:3:3:3:3/128 {
primary;
}
}
family mpls;
}
}
user@R3# show protocols
rsvp {
interface all;
}
mpls {
admin-groups {
c0 0;
c1 1;
c2 2;
c3 3;
c4 4;
c5 5;
c6 6;
c7 7;
c8 8;
c9 9;
c10 10;
c11 11;
c12 12;
c13 13;
c14 14;
c15 15;
c16 16;
c17 17;
c18 18;
c19 19;
c20 20;
c21 21;
c22 22;
c23 23;
c24 24;
c25 25;
c26 26;
c27 27;
c28 28;
c29 29;
c30 30;
c31 31;
}
interface all;
interface ge-0/0/5.0 {
admin-group c0;
}
}
ospf {
area 0.0.0.0 {
interface ge-0/0/5.0 {
link-protection;
metric 10;
}
interface xe-0/3/1.0 {
metric 21;
}
interface ge-1/0/0.0 {
metric 13;
}
interface ge-1/0/6.0 {
metric 15;
}
interface xe-1/3/0.0 {
link-protection;
metric 22;
}
}
}
ospf3 {
area 0.0.0.0 {
interface ge-0/0/5.0 {
link-protection;
metric 10;
}
interface xe-0/3/1.0 {
metric 21;
}
interface ge-1/0/0.0 {
metric 13;
}
interface ge-1/0/6.0 {
metric 15;
}
interface xe-1/3/0.0 {
link-protection;
metric 22;
}
}
}
user@R3# show routing-options
srlg {
srlg1 srlg-value 1001;
srlg2 srlg-value 1002;
srlg3 srlg-value 1003;
srlg4 srlg-value 1004;
srlg5 srlg-value 1005;
srlg6 srlg-value 1006;
srlg7 srlg-value 1007;
srlg8 srlg-value 1008;
srlg9 srlg-value 1009;
srlg10 srlg-value 10010;
srlg11 srlg-value 10011;
srlg12 srlg-value 10012;
}
router-id 172.16.3.3;
forwarding-table {
export ecmp;
}
backup-selection {
destination 10.1.1.0/30 {
interface xe-1/3/0.0 {
admin-group {
include-all c2;
}
}
interface all {
admin-group {
exclude c3;
}
srlg strict;
protection-type node;
bandwidth-greater-equal-primary;
node {
preference 172.16.7.7;
}
root-metric lowest;
metric-order root;
}
}
destination 172.16.30.0/30 {
interface all {
admin-group {
exclude c5;
}
srlg strict;
protection-type node;
bandwidth-greater-equal-primary;
node {
preference 172.16.7.7;
}
root-metric lowest;
metric-order root;
}
}
destination 192.168.45.0/30 {
interface all {
admin-group {
exclude c5;
}
srlg strict;
protection-type node;
bandwidth-greater-equal-primary;
node {
preference 172.16.7.7;
}
root-metric lowest;
metric-order root;
}
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
- Verifying the Routes
- Verifying the OSPF Route
- Verifying the OSPF3 Route
- Verifying the Backup Selection Policy for Device R3
Verifying the Routes
Purpose
Verify that the expected routes are learned.
Action
From operational mode, run the show route command for the routing table.
user@R3> show route
inet.0: 48 destinations, 48 routes (48 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
172.16.3.3/32 *[Direct/0] 02:22:27
> via lo0.0
10.4.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.5.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.6.128.0/17 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.9.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.10.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.13.4.0/23 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.13.10.0/23 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.82.0.0/15 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.84.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.85.12.0/22 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.92.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.92.16.0/20 *[Direct/0] 02:22:57
> via fxp0.0
10.92.24.195/32 *[Local/0] 02:22:57
Local via fxp0.0
10.94.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.99.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.102.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.150.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.155.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.157.64.0/19 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.160.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.204.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.205.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.206.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.207.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.209.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.212.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.213.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.214.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.215.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.216.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.218.13.0/24 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.218.14.0/24 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.218.16.0/20 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.218.32.0/20 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
10.227.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
172.16.50.0/30 *[Direct/0] 02:19:55
> via ge-0/0/5.0
172.16.50.2/32 *[Local/0] 02:19:58
Local via ge-0/0/5.0
172.16.75.0/30 *[Direct/0] 02:19:55
> via xe-0/3/1.0
172.16.75.1/32 *[Local/0] 02:19:57
Local via xe-0/3/1.0
172.16.24.195/32 *[Direct/0] 02:22:57
> via lo0.0
172.16.0.0/12 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.0.0/16 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.102.0/23 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.136.0/24 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.136.192/32 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.137.0/24 *[Static/5] 02:22:57
> to 10.92.31.254 via fxp0.0
192.168.233.5/32 *[OSPF/10] 00:16:55, metric 1
MultiRecv
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
47.0005.80ff.f800.0000.0108.0001.1280.9202.4195/152
*[Direct/0] 02:22:57
> via lo0.0
mpls.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0 *[MPLS/0] 00:16:55, metric 1
Receive
1 *[MPLS/0] 00:16:55, metric 1
Receive
2 *[MPLS/0] 00:16:55, metric 1
Receive
13 *[MPLS/0] 00:16:55, metric 1
Receive
inet6.0: 10 destinations, 11 routes (10 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2001:db8:50:1:1::/64 *[Direct/0] 02:19:44
> via ge-0/0/5.0
2001:db8:50:1:1::2/128 *[Local/0] 02:19:58
Local via ge-0/0/5.0
2001:db8:75:1:1::/64 *[Direct/0] 02:19:44
> via xe-0/3/1.0
2001:db8:75:1:1::1/128 *[Local/0] 02:19:57
Local via xe-0/3/1.0
2001:db8::3:3:3:3/128 *[Direct/0] 02:22:27
> via lo0.0
2001:db8::128:92:24:195/128
*[Direct/0] 02:22:57
> via lo0.0
fe80::/64 *[Direct/0] 02:19:44
> via ge-0/0/5.0
[Direct/0] 02:19:43
> via xe-0/3/1.0
fe80::205:86ff:fe00:ed05/128
*[Local/0] 02:19:58
Local via ge-0/0/5.0
fe80::205:86ff:fe00:ed3d/128
*[Local/0] 02:19:57
Local via xe-0/3/1.0
fe80::5668:a50f:fcc1:3ca2/128
*[Direct/0] 02:22:57
> via lo0.0Meaning
The output shows all Device R3 routes.
Verifying the OSPF Route
Purpose
Verify the routing table of OSPF.
Action
From operational mode, run the show ospf route
detail command for Device R3.
user@R3> show ospf route detail
Topology default Route Table:
Prefix Path Route NH Metric NextHop Nexthop
Type Type Type Interface Address/LSP
172.16.50.0/30 Intra Network IP 10 ge-0/0/5.0
area 0.0.0.0, origin 172.16.3.3, priority low
172.16.75.0/30 Intra Network IP 21 xe-0/3/1.0
area 0.0.0.0, origin 172.16.3.3, priority lowMeaning
The output displays the routing table of OSPF routers.
Verifying the OSPF3 Route
Purpose
Verify the routing table of OSPF3.
Action
From operational mode, run the show ospf3 route
detail command for Device R3.
user@R3> show ospf3 route detail
Prefix Path Route NH Metric
Type Type Type
2001:db8:50:1:1::/64 Intra Network IP 10
NH-interface ge-0/0/5.0
Area 0.0.0.0, Origin 172.16.3.3, Priority low
2001:db8:75:1:1::/64 Intra Network IP 21
NH-interface xe-0/3/1.0
Area 0.0.0.0, Origin 172.16.3.3, Priority lowMeaning
The output displays the routing table of OSPF3 routers.
Verifying the Backup Selection Policy for Device R3
Purpose
Verify the backup selection policy for Device R3.
Action
From operational mode, run the show backup-selection command for Device R3.
user@R3> show backup-selection
Prefix: 10.1.1.0/30
Interface: all
Admin-group exclude: c3
Neighbor preference: 172.16.7.7
Protection Type: Node, Downstream Paths Only: Disabled, SRLG: Strict, B/w >= Primary: Enabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Root-metric, Dest-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth, Protection, node, Metric
Interface: xe-1/3/0.0
Admin-group include-all: c2
Protection Type: Link, Downstream Paths Only: Disabled, SRLG: Loose, B/w >= Primary: Disabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Dest-metric, Root-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth, Protection, node, Metric Prefix: 172.16.30.0/30
Interface: all
Admin-group exclude: c5
Neighbor preference: 172.16.7.7
Protection Type: Node, Downstream Paths Only: Disabled, SRLG: Strict, B/w >= Primary: Enabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Root-metric, Dest-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth, Protection, node, Metric
Prefix: 172.16.45.0/30
Interface: all
Admin-group exclude: c5
Neighbor preference: 172.16.7.7
Protection Type: Node, Downstream Paths Only: Disabled, SRLG: Strict, B/w >= Primary: Enabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Root-metric, Dest-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth, Protection, node, Metric Meaning
The output displays the configured policies per prefix per primary next-hop interface.
Example: Injecting OSPF Routes into the BGP Routing Table
This example shows how to create a policy that injects OSPF routes into the BGP routing table.
Requirements
Before you begin:
Configure network interfaces.
Configure external peer sessions. See Example: Configuring External BGP Point-to-Point Peer Sessions.
Configure interior gateway protocol (IGP) sessions between peers.
Overview
In this example, you create a routing policy called injectpolicy1 and a routing term called injectterm1. The policy injects
OSPF routes into the BGP routing table.
Topology
Configuration
Configuring the Routing Policy
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy level,
and then enter commit from configuration mode.
set policy-options policy-statement injectpolicy1 term injectterm1 from protocol ospf set policy-options policy-statement injectpolicy1 term injectterm1 from area 0.0.0.1 set policy-options policy-statement injectpolicy1 term injectterm1 then accept set protocols bgp export injectpolicy1
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To inject OSPF routes into a BGP routing table:
Create the policy term.
content_copy zoom_out_map[edit policy-options policy-statement injectpolicy1] user@host# set term injectterm1
Specify OSPF as a match condition.
content_copy zoom_out_map[edit policy-options policy-statement injectpolicy1 term injectterm1] user@host# set from protocol ospf
Specify the routes from an OSPF area as a match condition.
content_copy zoom_out_map[edit policy-options policy-statement injectpolicy1 term injectterm1] user@host# set from area 0.0.0.1
Specify that the route is to be accepted if the previous conditions are matched.
content_copy zoom_out_map[edit policy-options policy-statement injectpolicy1 term injectterm1] user@host# set then accept
Apply the routing policy to BGP.
content_copy zoom_out_map[edit] user@host# set protocols bgp export injectpolicy1
Results
Confirm your configuration by entering the show
policy-options and show protocols bgp commands from
configuration mode. If the output does not display the intended configuration,
repeat the instructions in this example to correct the configuration.
user@host# show policy-options
policy-statement injectpolicy1 {
term injectterm1 {
from {
protocol ospf;
area 0.0.0.1;
}
then accept;
}
}
user@host# show protocols bgp export injectpolicy1;
If you are done configuring the device, enter commit from configuration mode.
Configuring Tracing for the Routing Policy
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy level,
and then enter commit from configuration mode.
set policy-options policy-statement injectpolicy1 term injectterm1 then trace set routing-options traceoptions file ospf-bgp-policy-log set routing-options traceoptions file size 5m set routing-options traceoptions file files 5 set routing-options traceoptions flag policy
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
Include a trace action in the policy.
content_copy zoom_out_map[edit policy-options policy-statement injectpolicy1 term injectterm1] user@host# then trace
Configure the tracing file for the output.
content_copy zoom_out_map[edit routing-options traceoptions] user@host# set file ospf-bgp-policy-log user@host# set file size 5m user@host# set file files 5 user@host# set flag policy
Results
Confirm your configuration by entering the show
policy-options and show routing-options commands
from configuration mode. If the output does not display the intended
configuration, repeat the instructions in this example to correct
the configuration.
user@host# show policy-options
policy-statement injectpolicy1 {
term injectterm1 {
then {
trace;
}
}
}
user@host# show routing-options
traceoptions {
file ospf-bgp-policy-log size 5m files 5;
flag policy;
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Troubleshooting
Using the show log Command to Examine the Actions of the Routing Policy
Problem
The routing table contains unexpected routes, or routes are missing from the routing table.
Solution
If you configure policy tracing as shown in this example,
you can run the show log ospf-bgp-policy-log command to
diagnose problems with the routing policy. The show log ospf-bgp-policy-log command displays information about the routes that the injectpolicy1 policy term analyzes and acts upon.
Example: Redistributing Static Routes into OSPF
This example shows how to create a policy that redistributes static routes into OSPF.
Requirements
Before you begin:
Configure the device interfaces. See the Interfaces User Guide for Security Devices.
Overview
In this example, you create a routing policy called exportstatic1 and a routing term called exportstatic1. The policy injects static routes into OSPF. This example includes the following settings:
policy-statement—Defines the routing policy. You specify the name of the policy and further define the elements of the policy. The policy name must be unique and can contain letters, numbers, and hyphens ( - ) and be up to 255 characters long.term—Defines the match condition and applicable actions for the routing policy. The term name can contain letters, numbers, and hyphens ( - ) and be up to 255 characters long. You specify the name of the term and define the criteria that an incoming route must match by including thefromstatement and the action to take if the route matches the conditions by including thethenstatement. In this example you specify the static protocol match condition and the accept action.export—Applies the export policy you created to be evaluated when routes are being exported from the routing table into OSPF.
Topology
Configuration
CLI Quick Configuration
To quickly create a policy that injects static routes into OSPF, copy the following commands and paste them into the CLI.
[edit] set policy-options policy-statement exportstatic1 term exportstatic1 from protocol static set policy-options policy-statement exportstatic1 term exportstatic1 then accept set protocols ospf export exportstatic1
Procedure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Modifying the Junos OS Configuration in the CLI User Guide.
To inject static routes into OSPF:
Create the routing policy.
content_copy zoom_out_map[edit] user@host# edit policy-options policy-statement exportstatic1
Create the policy term.
content_copy zoom_out_map[edit policy-options policy-statement exportstatic1] user@host# set term exportstatic1
Specify static as a match condition.
content_copy zoom_out_map[edit policy-options policy-statement exportstatic1 term exportstatic1] user@host# set from protocol static
Specify that the route is to be accepted if the previous condition is matched.
content_copy zoom_out_map[edit policy-options policy-statement exportstatic1 term exportstatic1] user@host# set then accept
Apply the routing policy to OSPF.
Note:For OSPFv3, include the
ospf3statement at the[edit protocols]hierarchy level.content_copy zoom_out_map[edit] user@host# set protocols ospf export exportstatic1
If you are done configuring the device, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
Results
Confirm your configuration by entering the show
policy-options and show protocols ospf commands.
If the output does not display the intended configuration, repeat
the instructions in this example to correct the configuration.
user@host# show policy-options
policy-statement exportstatic1 {
term exportstatic1 {
from protocol static;
then accept;
}
}
user@host# show protocols ospf export exportstatic1;
To confirm your OSPFv3 configuration, enter the show policy-options and the show protocols ospf3 commands.
Verification
Confirm that the configuration is working properly.
- Verifying That the Expected Static Routes Are Present
- Verifying That AS External LSAs Are Added to the Routing Table
Verifying That the Expected Static Routes Are Present
Purpose
Verify the effect of the export policy.
Action
From operational mode, enter the show route command.
Verifying That AS External LSAs Are Added to the Routing Table
Purpose
On the routing device where you configured the export policy, verify that the routing device originates an AS external LSA for the static routes that are added to the routing table.
Action
From operational mode, enter the show ospf database command for OSPFv2, and enter the show ospf3 database command for OSPFv3.
Example: Configuring an OSPF Import Policy
This example shows how to create an OSPF import policy. OSPF import policies apply to external routes only. An external route is a route that is outside the OSPF autonomous system (AS).
Requirements
Before you begin:
Configure the router identifiers for the devices in your OSPF network. See Example: Configuring an OSPF Router Identifier.
Control OSPF designated router election. See Example: Controlling OSPF Designated Router Election.
Configure a single-area OSPF network. See Example: Configuring a Single-Area OSPF Network .
Overview
External routes are learned by AS boundary routers. External routes can be advertised throughout the OSPF domain if you configure the AS boundary router to redistribute the route into OSPF. An external route might be learned by the AS boundary router from a routing protocol other than OSPF, or the external route might be a static route that you configure on the AS boundary router.
For OSPFv3, the link-state advertisement (LSA) is referred to as the interarea prefix LSA and performs the same function as a network-summary LSA performs for OSPFv2. An area border router (ABR) originates an interarea prefix LSA for each IPv6 prefix that must be advertised into an area.
OSPF import policy allows you to prevent external routes from being added to the routing tables of OSPF neighbors. The import policy does not impact the OSPF database. This means that the import policy has no impact on the link-state advertisements. The filtering is done only on external routes in OSPF. The intra-area and interarea routes are not considered for filtering. The default action is to accept the route when the route does not match the policy.
This example includes the following OSPF policy settings:
policy-statement—Defines the routing policy. You specify the name of the policy and further define the elements of the policy. The policy name must be unique and can contain letters, numbers, and hyphens ( - ) and be up to 255 characters long.export—Applies the export policy you created to be evaluated when network summary LSAs are flooded into an area. In this example, the export policy is named export_static.import—Applies the import policy you created to prevent external routes from being added to the routing table. In this example, the import policy is named filter_routes.
The devices you configure in this example represent the following functions:
R1—Device R1 is in area 0.0.0.0 and has a direct connection to device R2. R1 has an OSPF export policy configured. The export policy redistributes static routes from R1’s routing table into R1’s OSPF database. Because the static route is in R1’s OSPF database, the route is advertised in an LSA to R1’s OSPF neighbor. R1’s OSPF neighbor is device R2.
R2—Device R2 is in area 0.0.0.0 and has a direct connection to device R1. R2 has an OSPF import policy configured that matches the static route to the 10.0.16.0/30 network and prevents the static route from being installed in R2’s routing table. R2’s OSPF neighbor is device R1.
Configuration
CLI Quick Configuration
To quickly configure an OSPF import policy,
paste them into a text file, remove any line breaks, change any details
necessary to match your network configuration, copy and paste the
commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.
Configuration on Device R1:
[edit] set interfaces so-0/2/0 unit 0 family inet address 10.0.2.1/30 set protocols ospf export export_static set protocols ospf area 0.0.0.0 interface so-0/2/0 set policy-options policy-statement export_static from protocol static set policy-options policy-statement export_static then accept
Configuration on Device R2:
[edit] set interfaces so-0/2/0 unit 0 family inet address 10.0.2.2/30 set protocols ospf import filter_routes set protocols ospf area 0.0.0.0 interface so-0/2/0 set policy-options policy-statement filter_routes from route-filter 10.0.16.0/30 exact set policy-options policy-statement filter_routes then reject
Procedure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Modifying the Junos OS Configuration in theCLI User Guide.
To configure an OSPF import policy:
Configure the interfaces.
content_copy zoom_out_map[edit] user@R1# set interfaces so-0/2/0 unit 0 family inet address 10.0.2.1/30
content_copy zoom_out_map[edit] user@R2# set interfaces so-0/2/0 unit 0 family inet address 10.0.2.2/30
Enable OSPF on the interfaces.
Note:For OSPFv3, include the
ospf3statement at the[edit protocols]hierarchy level.content_copy zoom_out_map[edit] user@R1# set protocols ospf area 0.0.0.0 interface so-0/2/0
content_copy zoom_out_map[edit] user@R2# set protocols ospf area 0.0.0.0 interface so-0/2/0
On R1, redistribute the static route into OSPF.
content_copy zoom_out_map[edit] user@R1# set protocols ospf export export_static user@R1# set policy-options policy-statement export_static from protocol static user@R1# set policy-options policy-statement export_static then accept
On R2, configure the OSPF import policy.
content_copy zoom_out_map[edit] user@R2# set protocols ospf import filter_routes user@R2# set policy-options policy-statement filter_routes from route-filter 10.0.16.0/30 exact user@R2# set policy-options policy-statement filter_routes then reject
If you are done configuring the devices, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
Results
Confirm your configuration by entering the show
interfaces, show policy-options, and show protocols
ospf commands on the appropriate device. If the output does
not display the intended configuration, repeat the instructions in
this example to correct the configuration.
Output for R1:
user@R1# show interfaces
so-0/2/0 {
unit 0 {
family inet {
address 10.0.2.1/30;
}
}
}
user@R1# show policy-options
policy-statement export_static {
from protocol static;
then accept;
}
user@R1# show protocols ospf
export export_static;
area 0.0.0.0 {
interface so-0/2/0.0;
}
Output for R2:
user@R2# show interfaces
so-0/2/0 {
unit 0 {
family inet {
address 10.0.2.2/30;
}
}
}
user@R2# show policy-options
policy-statement filter_routes {
from {
route-filter 10.0.16.0/30 exact;
}
then reject;
}
user@R2# show protocols ospf
import filter_routes;
area 0.0.0.0 {
interface so-0/2/0.0;
}
To confirm your OSPFv3 configuration, enter the show interfaces, show policy-options, show routing-options, and show protocols ospf3 commands on the appropriate
device.
Verification
Confirm that the configuration is working properly.
Verifying the OSPF Database
Purpose
Verify that OSPF is advertising the static route in the OSPF database.
Action
From operational mode, enter the show ospf database for OSPFv2, and enter the show ospf3 database command
for OSPFv3.
Example: Configuring a Route Filter Policy to Specify Priority for Prefixes Learned Through OSPF
This example shows how to create an OSPF import policy that prioritizes specific prefixes learned through OSPF.
Requirements
Before you begin:
Configure the device interfaces. See the Interfaces User Guide for Security Devices.
Configure the router identifiers for the devices in your OSPF network. See Example: Configuring an OSPF Router Identifier.
Control OSPF designated router election See Example: Controlling OSPF Designated Router Election
Configure a single-area OSPF network. See Example: Configuring a Single-Area OSPF Network .
Configure a multiarea OSPF network. See Example: Configuring a Multiarea OSPF Network.
Overview
In a network with a large number of OSPF routes, it can be useful to control the order in which routes are updated in response to a network topology change. In Junos OS Release 9.3 and later, you can specify a priority of high, medium, or low for prefixes included in an OSPF import policy. In the event of an OSPF topology change, high priority prefixes are updated in the routing table first, followed by medium and then low priority prefixes.
OSPF import policy can only be used to set priority or to filter
OSPF external routes. If an OSPF import policy is applied that results
in a reject terminating action for a nonexternal route,
then the reject action is ignored and the route is accepted
anyway. By default, such a route is now installed in the routing table
with a priority of low. This behavior prevents traffic black holes,
that is, silently discarded traffic, by ensuring consistent routing
within the OSPF domain.
In general, OSPF routes that are not explicitly assigned a priority are treated as priority medium, except for the following:
Summary discard routes have a default priority of low.
Local routes that are not added to the routing table are assigned a priority of low.
External routes that are rejected by import policy and thus not added to the routing table are assigned a priority of low.
Any available match criteria applicable to OSPF routes can be
used to determine the priority. Two of the most commonly used match
criteria for OSPF are the route-filter and tag statements.
In this example, the routing device is in area 0.0.0.0, with
interfaces fe-0/1/0 and fe-1/1/0 connecting
to neighboring devices. You configure an import routing policy named
ospf-import to specify a priority for prefixes learned through OSPF.
Routes associated with these prefixes are installed in the routing
table in the order of the prefixes’ specified priority. Routes
matching 192.0.2.0/24 orlonger are installed first because
they have a priority of high. Routes matching 198.51.100.0/24
orlonger are installed next because they have a priority of medium. Routes matching 203.0.113.0/24 orlonger are
installed last because they have a priority of low. You
then apply the import policy to OSPF.
The priority value takes effect when a new route is installed, or when there is a change to an existing route.
Topology
Configuration
CLI Quick Configuration
To quickly configure an OSPF import policy
that prioritizes specific prefixes learned through OSPF, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy level,
and then enter commit from configuration mode.
[edit] set interfaces fe-0/1/0 unit 0 family inet address 192.168.8.4/30 set interfaces fe-0/1/0 unit 0 family inet address 192.168.8.5/30 set policy-options policy-statement ospf-import term t1 from route-filter 203.0.113.0/24 orlonger set policy-options policy-statement ospf-import term t1 then priority low set policy-options policy-statement ospf-import term t1 then accept set policy-options policy-statement ospf-import term t2 from route-filter 198.51.100.0/24 orlonger set policy-options policy-statement ospf-import term t2 then priority medium set policy-options policy-statement ospf-import term t2 then accept set policy-options policy-statement ospf-import term t3 from route-filter 192.0.2.0/24 orlonger set policy-options policy-statement ospf-import term t3 then priority high set policy-options policy-statement ospf-import term t3 then accept set protocols ospf import ospf-import set protocols ospf area 0.0.0.0 interface fe-0/1/0 set protocols ospf area 0.0.0.0 interface fe-1/1/0
Procedure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Modifying the Junos OS Configuration in theCLI User Guide.
To configure an OSPF import policy that prioritizes specific prefixes:
Configure the interfaces.
content_copy zoom_out_map[edit] user@host# set interfaces fe-0/1/0 unit 0 family inet address 192.168.8.4/30 user@host# set interfaces fe-0/2/0 unit 0 family inet address 192.168.8.5/30
Enable OSPF on the interfaces.
Note:For OSPFv3, include the
ospf3statement at the[edit protocols]hierarchy level.content_copy zoom_out_map[edit] user@host# set protocols ospf area 0.0.0.0 interface fe-0/1/0 user@host# set protocols ospf area 0.0.0.0 interface fe-0/2/0
Configure the policy to specify the priority for prefixes learned through OSPF.
content_copy zoom_out_map[edit ] user@host# set policy-options policy-statement ospf-import term t1 from route-filter 203.0.113.0/24 orlonger user@host# set policy-options policy-statement ospf-import term t1 then priority low user@host# set policy-options policy-statement ospf-import term t1 then accept user@host# set policy-options policy-statement ospf-import term t2 from route-filter 198.51.100.0/24 orlonger user@host# set policy-options policy-statement ospf-import term t2 then priority medium user@host# set policy-options policy-statement ospf-import term t2 then accept user@host# set policy-options policy-statement ospf-import term t3 from route-filter 192.0.2.0/24 orlonger user@host# set policy-options policy-statement ospf-import term t3 then priority high user@host# set policy-options policy-statement ospf-import term t3 then accept
Apply the policy to OSPF.
content_copy zoom_out_map[edit] user@host# set protocols ospf import ospf-import
If you are done configuring the device, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
Results
Confirm your configuration by entering the show
interfaces, show policy-options, and the show
protocols ospf commands. If the output does not display the
intended configuration, repeat the instructions in this example to
correct the configuration.
user@host# show interfaces
fe-0/1/0 {
unit 0 {
family inet {
address 192.168.8.4/30;
}
}
}
fe-0/2/0 {
unit 0 {
family inet {
address 192.168.8.5/30;
}
}
}
user@host# show protocols ospf
import ospf-import;
area 0.0.0.0 {
interface fe-0/1/0.0;
interface fe-0/2/0.0;
}
user@host# show policy-options
policy-statement ospf-import {
term t1 {
from {
route-filter 203.0.113.0/24 orlonger;
}
then {
priority low;
accept;
}
}
term t2 {
from {
route-filter 198.51.100.0/24 orlonger;
}
then {
priority medium;
accept;
}
}
term t3 {
from {
route-filter 192.0.2.0/24 orlonger;
}
then {
priority high;
accept;
}
}
}
user@host# show protocols ospf
import ospf-import;
area 0.0.0.0 {
interface fe-0/1/0.0;
interface fe-0/2/0.0;
}
To confirm your OSPFv3 configuration, enter the show interfaces, show policy-options, and show protocols ospf3 commands.
Verification
Confirm that the configuration is working properly.
Import and Export Policies for Network Summaries Overview
By default, OSPF uses network-summary link-state advertisements (LSAs) to transmit route information across area boundaries. Each area border router (ABR) floods network-summary LSAs to other routing devices in the same area. The ABR also controls which routes from the area are used to generate network-summary LSAs into other areas. Each ABR maintains a separate topological database for each area to which they are connected. In Junos OS Release 9.1 and later, you can configure export and import policies for OSPFv2 and OSPFv3 that enable you to control how network-summary LSAs, which contain information about interarea OSPF prefixes, are distributed and generated. For OSPFv3, the LSA is referred to as the interarea prefix LSA and performs the same function as a network-summary LSA performs for OSPFv2. An ABR originates an interarea prefix LSA for each IPv6 prefix that must be advertised into an area.
The export policy enables you to specify which summary LSAs
are flooded into an area. The import policy enables you to control
which routes learned from an area are used to generate summary LSAs
into other areas. You define a routing policy at the [edit policy-options
policy-statement policy-name] hierarchy
level. As with all OSPF export policies, the default for network-summary
LSA export policies is to reject everything. Similarly, as with all
OSPF import policies, the default for network-summary LSA import policies
is to accept all OSPF routes.
Example: Configuring an OSPF Export Policy for Network Summaries
This example shows how to create an OSPF export policy to control the network-summary (Type 3) LSAs that the ABR floods into an OSPF area.
Requirements
Before you begin:
Configure the router identifiers for the devices in your OSPF network. See Example: Configuring an OSPF Router Identifier.
Control OSPF designated router election. See Example: Controlling OSPF Designated Router Election
Overview
OSPF uses network-summary LSAs to transmit route information across area boundaries. Depending on your network environment, you might want to further filter the network-summary LSAs between OSPF areas. For example, if you create OSPF areas to define administrative boundaries, you might not want to advertise internal route information between those areas. To further improve the control of route distribution between multiple OSPF areas, you can configure network summary policies on the ABR for the area that you want to filter the advertisement of network-summary LSAs.
For OSPFv3, the LSA is referred to as the interarea prefix LSA and performs the same function as a network-summary LSA performs for OSPFv2. An ABR originates an interarea prefix LSA for each IPv6 prefix that must be advertised into an area. In this topic, the terms network summary policy and network-summary policy are used to describe both OSPFv2 and OSPFv3 functionality.
The following guidelines apply to export network summary policies:
You should have a thorough understanding of your network before configuring these policies. Incorrect network summary policy configuration might result in an unintended result such as suboptimal routing or dropped traffic.
We recommend that you use the route-filter policy match condition for these types of policies.
We recommend that you use the
acceptandrejectrouting policy terms for these types of policies.
Figure 3 shows a sample topology with three OSPF areas. R4 generates network summaries for the routes in area 4 and sends them out of area 4 to area 0. R3 generates network summaries for the routes in area 3 and sends them out of area 3 to area 0.
In this example, you configure R4 with an export network summary
policy named export-policy that only allows routes that match the
10.0.4.4 prefix from area 3 into area 4. The export policy controls
the network-summary LSAs that R4 floods into area 4. This results
in only the allowed interarea route to enter area 4, and all other
interarea routes to be purged from the OSPF database and the routing
table of the devices in area 4. You first define the policy and then
apply it to the ABR by including the network-summary-export statement for OSPFv2 or the inter-area-prefix-export statement for OSPFv3.
The devices operate as follows:
R1—Device R1 is an internal router in area 3. Interface
fe-0/1/0has an IP address of 10.0.4.13/30 and connects to R3. Interfacefe-0/0/1has an IP address of 10.0.4.5/30 and connects to R2.R2—Device R2 is an internal router in area 3. Interface
fe-0/0/1has an IP address of 10.0.4.6/30 and connects to R1. Interfacefe-1/0/0has an IP address of 10.0.4.1 and connects to R3.R3—Device R3 participates in area 3 and area 0. R3 is the ABR between area 3 and area 0, and passes network-summary LSAs between the areas. Interface
fe-1/0/0has an IP address of 10.0.4.2/30 and connects to R2. Interfacefe-1/1/0has an IP address of 10.0.4.14/30 and connects to R1. Interfacefe-0/0/1has an IP address of 10.0.2.1/30 and connects to R4.R4—Device R4 participates in area 0 and area 4. R4 is the ABR between area 0 and area 4, and passes network-summary LSAs between the areas. Interface
fe-0/0/1has an IP address of 10.0.2.4/30 and connects to R3. Interfacefe-1/1/0has an IP address of 10.0.8.6/30 and connects to R5. Interfacefe-1/0/0has an IP address of 10.0.8.9/30 and connects to R6.R5—Device R5 is an internal router in area 4. Interface
fe-1/1/0has an IP address of 10.0.8.5/30 and connects to R4.R6—Device R6 is an internal router in area 4. Interface
fe-1/0/0has an IP address of 10.0.8.10/30 and connects to R4.
Configuration
CLI Quick Configuration
To quickly configure an OSPF export policy
for network summaries, copy the following commands, paste them into
a text file, remove any line breaks, change any details necessary
to match your network configuration, copy and paste the commands into
the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.
Configuration on Device R1:
[edit] set interfaces fe-0/1/0 unit 0 family inet address 10.0.4.13/30 set interfaces fe-0/0/1 unit 0 family inet address 10.0.4.5/30 set protocols ospf area 0.0.0.3 interface fe-0/1/0 set protocols ospf area 0.0.0.3 interface fe-0/0/1
Configuration on Device R2:
[edit] set interfaces fe-0/1/0 unit 0 family inet address 10.0.4.6/30 set interfaces fe-1/0/0 unit 0 family inet address 10.0.4.1/30 set protocols ospf area 0.0.0.3 interface fe-0/1/0 set protocols ospf area 0.0.0.3 interface fe-1/0/0
Configuration on Device R3:
[edit] set interfaces fe-1/0/0 unit 0 family inet address 10.0.4.2/30 set interfaces fe-1/1/0 unit 0 family inet address 10.0.4.14/30 set interfaces fe-0/0/1 unit 0 family inet address 10.0.2.1/30 set protocols ospf area 0.0.0.3 interface fe-1/0/0 set protocols ospf area 0.0.0.3 interface fe-1/1/0 set protocols ospf area 0.0.0.0 interface fe-0/0/1
Configuration on Device R4:
[edit] set interfaces fe-0/0/1 unit 0 family inet address 10.0.2.1/30 set interfaces fe-1/1/0 unit 0 family inet address 10.0.8.6/30 set interfaces fe-1/0/0 unit 0 family inet address 10.0.8.9/30 set policy-options policy-statement export-policy term term1 from route-filter 10.0.4.4/30 prefix-length-range /30-/30 set policy-options policy-statement export-policy term term1 then accept set protocols ospf area 0.0.0.0 interface fe-0/0/1 set protocols ospf area 0.0.0.4 interface fe-0/1/0 set protocols ospf area 0.0.0.4 interface fe-1/0/0 set protocols ospf area 0.0.0.4 network-summary-export export-policy
Configuration on Device R5:
[edit] set interfaces fe-1/1/0 unit 0 family inet address 10.0.8.5/30 set protocols ospf area 0.0.0.4 interface fe-0/1/0
Configuration on Device R6:
[edit] set interfaces fe-1/0/0 unit 0 family inet address 10.0.8.10/30 set protocols ospf area 0.0.0.4 interface fe-1/0/0
Procedure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Modifying the Junos OS Configuration in the CLI User Guide.
To configure an configure an OSPF export policy for network summaries:
Configure the interfaces.
Note:For OSPFv3, use IPv6 addresses.
content_copy zoom_out_map[edit] user@R1# set interfaces fe-0/1/0 unit 0 family inet address 10.0.4.13/30 user@R1# set interfaces fe-0/0/1 unit 0 family inet address 10.0.4.5/30
content_copy zoom_out_map[edit] user@R2# set interfaces fe-0/1/0 unit 0 family inet address 10.0.4.6/30 user@R2# set interfaces fe-1/0/0 unit 0 family inet address 10.0.4.1/30
content_copy zoom_out_map[edit] user@R3# set interfaces fe-1/0/0 unit 0 family inet address 10.0.4.2/30 user@R3# set interfaces fe-1/1/0 unit 0 family inet address 10.0.4.14/30 user@R3#set interfaces fe-0/0/1 unit 0 family inet address 10.0.2.1/30
content_copy zoom_out_map[edit] user@R4# set interfaces fe-0/0/1 unit 0 family inet address 10.0.2.1/30 user@R4# set interfaces fe-1/1/0 unit 0 family inet address 10.0.8.6/30 user@R4# set interfaces fe-1/0/0 unit 0 family inet address 10.0.8.9/30
content_copy zoom_out_map[edit] user@R5# set interfaces fe-1/1/0 unit 0 family inet address 10.0.8.5/30
content_copy zoom_out_map[edit] user@R6# set interfaces fe-1/0/0 unit 0 family inet address 10.0.8.10/30
Enable OSPF on the interfaces.
Note:For OSPFv3, include the
ospf3statement at the[edit protocols]hierarchy level.content_copy zoom_out_map[edit] user@R1# set protocols ospf area 0.0.0.3 interface fe-0/1/0 user@R1# set protocols ospf area 0.0.0.3 interface fe-0/0/1
content_copy zoom_out_map[edit] user@R2# set protocols ospf area 0.0.0.3 interface fe-0/1/0 user@R2# set protocols ospf area 0.0.0.3 interface fe-1/0/0
content_copy zoom_out_map[edit] user@R3# set protocols ospf area 0.0.0.3 interface fe-1/0/0 user@R3# set protocols ospf area 0.0.0.3 interface fe-1/1/0 user@R3# set protocols ospf area 0.0.0.0 interface fe-0/0/1
content_copy zoom_out_map[edit] user@R4# set protocols ospf area 0.0.0.0 interface fe-0/0/1 user@R4# set protocols ospf area 0.0.0.4 interface fe-1/1/0 user@R4# set protocols ospf area 0.0.0.4 interface fe-1/0/0
content_copy zoom_out_map[edit] user@R5# set protocols ospf area 0.0.0.4 interface fe-1/1/0
content_copy zoom_out_map[edit] user@R6# set protocols ospf area 0.0.0.4 interface fe-1/0/0
On R4, configure the export network summary policy.
content_copy zoom_out_map[edit ] user@R4# set policy-options policy-statement export-policy term term1 from route-filter 10.0.4.4/30 prefix-length-range /30-/30 user@R4# set policy-options policy-statement export-policy term term1 then accept
On R4, apply the export network summary policy to OSPF.
Note:For OSPFv3, include the
inter-area-prefix-exportstatement at the[edit protocols ospf3 area area-id]hierarchy level.content_copy zoom_out_map[edit] user@R4# set protocols ospf area 0.0.0.4 network-summary-export export-policy
If you are done configuring the devices, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
Results
Confirm your configuration by entering the show
interfaces, show policy-options, and show protocols
ospf commands on the appropriate device. If the output does
not display the intended configuration, repeat the instructions in
this example to correct the configuration.
Output for R1:
user@R1# show interfaces
fe-0/0/1 {
unit 0 {
family inet {
address 10.0.4.5/30;
}
}
}
fe-1/1/0 {
unit 0 {
family inet {
address 10.0.4.13/30;
}
}
}
user@R1# show protocols ospf
area 0.0.0.3 {
interface fe-0/1/0.0;
interface fe-0/0/1.0;
}
Output for R2:
user@R2# show interfaces
fe-0/1/0 {
unit 0 {
family inet {
address 10.0.4.6/30;
}
}
}
fe-1/0/0 {
unit 0 {
family inet {
address 10.0.4.3/30;
}
}
}
user@R2# show protocols ospf
area 0.0.0.3 {
interface fe-0/1/0.0;
interface fe-1/0/0.0;
}
Output for R3:
user@R3# show interfaces
fe-0/0/1 {
unit 0 {
family inet {
address 10.0.2.3/30;
}
}
}
fe-1/0/0 {
unit 0 {
family inet {
address 10.0.4.2/30;
}
}
}
fe-1/1/0 {
unit 0 {
family inet {
address 10.0.4.14/30;
}
}
}
user@R3# show protocols ospf
area 0.0.0.0 {
interface fe-0/0/1.0;
}
area 0.0.0.3 {
interface fe-1/0/0.0;
interface fe-1/1/0.0;
}
Output for R4:
user@R4# show interfaces
fe-0/0/1 {
unit 0 {
family inet {
address 10.0.2.4/30;
}
}
}
fe-1/0/0 {
unit 0 {
family inet {
address 10.0.8.6/30;
}
}
}
fe-1/1/0 {
unit 0 {
family inet {
address 10.0.8.3/30;
}
}
}
user@R4# show protocols ospf
area 0.0.0.0 {
interface fe-0/0/1.0;
}
area 0.0.0.4 {
network-summary-export export-policy;
interface fe-1/0/0.0;
interface fe-1/1/0.0;
}
user@R4# show policy-options
policy-statement export-policy {
term term1 {
from {
route-filter 10.0.4.4/30 prefix-length-range /30-/30;
}
then accept;
}
}
Output for R5:
user@R5# show interfaces
fe-1/1/0 {
unit 0 {
family inet {
address 10.0.8.5/30;
}
}
}
user@R5# show protocols ospf
area 0.0.0.4 {
interface fe-1/1/0.0;
}
Output for R6:
user@R6# show interfaces
fe-1/0/0 {
unit 0 {
family inet {
address 10.0.8.7/30;
}
}
}
user@R6# show protocols ospf
area 0.0.0.4 {
interface fe-1/0/0.0;
}
To confirm your OSPFv3 configuration, enter the show interfaces, show policy-options, and show protocols ospf3 commands on the appropriate device.
Verification
Confirm that the configuration is working properly.
Verifying the OSPF Database
Purpose
Verify that the OSPF database for the devices in area 4 includes the interarea route that we permitted on the ABR R4. The other interarea routes that are not specified should age out or no longer be present in the OSPF database.
Action
From operational mode, enter the show ospf database
netsummary area 0.0.0.4 command for OSPFv2, and enter the show ospf3 database inter-area-prefix area 0.0.0.4 command
for OSPFv3.
Example: Configuring an OSPF Import Policy for Network Summaries
This example shows how to create an OSPF import policy to control the network-summary (Type 3) LSAs that the ABR advertises out of an OSPF area.
Requirements
Before you begin:
Configure the router identifiers for the devices in your OSPF network. See Example: Configuring an OSPF Router Identifier.
Control OSPF designated router election. See Example: Controlling OSPF Designated Router Election.
Overview
OSPF uses network-summary LSAs to transmit route information across area boundaries. Depending on your network environment, you might want to further filter the network-summary LSAs between OSPF areas. For example, if you create OSPF areas to define administrative boundaries, you might not want to advertise internal route information between those areas. To further improve the control of route distribution between multiple OSPF areas, you can configure network summary policies on the ABR for the area that you want to filter the advertisement of network-summary LSAs.
For OSPFv3, the LSA is referred to as the interarea prefix LSA and performs the same function as a network-summary LSA performs for OSPFv2. An ABR originates an interarea prefix LSA for each IPv6 prefix that must be advertised into an area. In this topic, the terms network summary policy and network-summary policy are used to describe both OSPFv2 and OSPFv3 functionality.
The following guidelines apply to import network summary policies:
You should have a thorough understanding of your network before configuring these policies. Incorrect network summary policy configuration might result in an unintended result such as suboptimal routing or dropped traffic.
We recommend that you use the
route-filterpolicy match condition for these types of policies.We recommend that you use the
acceptandrejectrouting policy terms for these types of policies.
Figure 4 shows a sample topology with three OSPF areas. R4 generates network summaries for the routes in area 4 and sends them out of area 4 to area 0. R3 generates network summaries for the routes in area 3 and sends them out of area 3 to area 0.
In this example, you configure R3 with an import network summary
policy named import-policy so R3 only generates network summaries
for the route 10.0.4.12/30. The import policy controls the routes
and therefore the network summaries that R3 advertises out of area
3, so applying this policy means that R3 only advertises route 10.0.4.12/30
out of area 3. This results in existing network summaries from other
interarea routes getting purged from the OSPF database in area 0 and
area 4, as well as the routing tables of the devices in areas 0 and
area 4. You first define the policy and then apply it to the ABR by
including the network-summary-import statement for OSPFv2
or the inter-area-prefix-import statement for OSPFv3.
The devices operate as follows:
R1—Device R1 is an internal router in area 3. Interface
ge-0/1/0has an IP address of 10.0.4.13/30 and connects to R3. Interfacege-0/0/1has an IP address of 10.0.4.5/30 and connects to R2.R2—Device R2 is an internal router in area 3. Interface
ge-0/0/1has an IP address of 10.0.4.6/30 and connects to R1. Interfacege-1/0/0has an IP address of 10.0.4.1/30 and connects to R3.R3—Device R3 participates in area 3 and area 0. R3 is the ABR between area 3 and area 0, and passes network-summary LSAs between the areas. Interface
ge-1/0/0has an IP address of 10.0.4.2/30 and connects to R2. Interfacege-1/1/0has an IP address of 10.0.4.14/30 and connects to R1. Interfacege-0/0/1has an IP address of 10.0.2.1/30 and connects to R4.R4—Device R4 participates in area 0 and area 4. R4 is the ABR between area 0 and area 4, and passes network-summary LSAs between the areas. Interface
ge-0/0/1has an IP address of 10.0.2.1/30 and connects to R3. Interfacege-1/1/0has an IP address of 10.0.8.6/30 and connects to R5. Interfacege-1/0/0has an IP address of 10.0.8.9/30 and connects to R6.R5—Device R5 is an internal router in area 4. Interface
ge-1/1/0has an IP address of 10.0.8.5/30 and connects to R4.R6—Device R6 is an internal router in area 4. Interface
ge-1/0/0has an IP address of 10.0.8.10/30 and connects to R4.
Configuration
Procedure
CLI Quick Configuration
To quickly configure an OSPF import policy
for network summaries, copy the following commands, paste them into
a text file, remove any line breaks, change any details necessary
to match your network configuration, copy and paste the commands into
the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.
Configuration on Device R1:
[edit] set interfaces ge-0/1/0 unit 0 family inet address 10.0.4.13/30 set interfaces ge-0/0/1 unit 0 family inet address 10.0.4.5/30 set protocols ospf area 0.0.0.3 interface ge-0/1/0 set protocols ospf area 0.0.0.3 interface ge-0/0/1
Configuration on Device R2:
[edit] set interfaces ge-0/1/0 unit 0 family inet address 10.0.4.6/30 set interfaces ge-1/0/0 unit 0 family inet address 10.0.4.1/30 set protocols ospf area 0.0.0.3 interface ge-0/1/0 set protocols ospf area 0.0.0.3 interface ge-1/0/0
Configuration on Device R3:
[edit] set interfaces ge-1/0/0 unit 0 family inet address 10.0.4.2/30 set interfaces ge-1/1/0 unit 0 family inet address 10.0.4.14/30 set interfaces ge-0/0/1 unit 0 family inet address 10.0.2.1/30 set policy-options policy-statement import-policy term term1 from route-filter 10.0.4.12/30 prefix-length-range /30-/30 set policy-options policy-statement import-policy term term1 then accept set policy-options policy-statement import-policy term term2 then reject set protocols ospf area 0.0.0.3 interface ge-1/0/0 set protocols ospf area 0.0.0.3 interface ge-1/1/0 set protocols ospf area 0.0.0.0 interface ge-0/0/1 set protocols ospf area 0.0.0.3 network-summary-import import-policy
Configuration on Device R4:
[edit] set interfaces ge-0/0/1 unit 0 family inet address 10.0.2.1/30 set interfaces ge-1/1/0 unit 0 family inet address 10.0.8.6/30 set interfaces ge-1/0/0 unit 0 family inet address 10.0.8.9/30 set protocols ospf area 0.0.0.0 interface ge-0/0/1 set protocols ospf area 0.0.0.4 interface ge-1/1/0 set protocols ospf area 0.0.0.4 interface ge-1/0/0
Configuration on Device R5:
[edit] set interfaces ge-1/1/0 unit 0 family inet address 10.0.8.5/30 set protocols ospf area 0.0.0.4 interface ge-1/1/0
Configuration on Device R6:
[edit] set interfaces ge-1/0/0 unit 0 family inet address 10.0.8.10/30 set protocols ospf area 0.0.0.4 interface ge-1/0/0
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Modifying the Junos OS Configuration in the CLI User Guide.
To configure an configure an OSPF import policy for network summaries:
Configure the interfaces.
Note:For OSPFv3, use IPv6 addresses.
content_copy zoom_out_map[edit] user@R1# set interfaces ge-0/1/0 unit 0 family inet address 10.0.4.13/30 user@R1# set interfaces ge-0/0/1 unit 0 family inet address 10.0.4.5/30
content_copy zoom_out_map[edit] user@R2# set interfaces ge-0/1/0 unit 0 family inet address 10.0.4.6/30 user@R2# set interfaces ge-1/0/0 unit 0 family inet address 10.0.4.1/30
content_copy zoom_out_map[edit] user@R3# set interfaces ge-1/0/0 unit 0 family inet address 10.0.4.2/30 user@R3# set interfaces ge-1/1/0 unit 0 family inet address 10.0.4.14/30 user@R3#set interfaces ge-0/0/1 unit 0 family inet address 10.0.2.1/30
content_copy zoom_out_map[edit] user@R4# set interfaces ge-0/0/1 unit 0 family inet address 10.0.2.1/30 user@R4# set interfaces ge-1/1/0 unit 0 family inet address 10.0.8.6/30 user@R4# set interfaces ge-1/0/0 unit 0 family inet address 10.0.8.9/30
content_copy zoom_out_map[edit] user@R5# set interfaces ge-1/1/0 unit 0 family inet address 10.0.8.5/30
content_copy zoom_out_map[edit] user@R6# set interfaces ge-1/0/0 unit 0 family inet address 10.0.8.10/30
Enable OSPF on the interfaces.
Note:For OSPFv3, include the
ospf3statement at the[edit protocols]hierarchy level.content_copy zoom_out_map[edit] user@R1# set protocols ospf area 0.0.0.3 interface ge-0/1/0 user@R1# set protocols ospf area 0.0.0.3 interface ge-0/0/1
content_copy zoom_out_map[edit] user@R2# set protocols ospf area 0.0.0.3 interface ge-0/1/0 user@R2# set protocols ospf area 0.0.0.3 interface ge-1/0/0
content_copy zoom_out_map[edit] user@R3# set protocols ospf area 0.0.0.3 interface ge-1/0/0 user@R3# set protocols ospf area 0.0.0.3 interface ge-1/1/0 user@R3# set protocols ospf area 0.0.0.0 interface ge-0/0/1
content_copy zoom_out_map[edit] user@R4# set protocols ospf area 0.0.0.0 interface ge-0/0/1 user@R4# set protocols ospf area 0.0.0.4 interface ge-1/1/0 user@R4# set protocols ospf area 0.0.0.4 interface ge-1/0/0
content_copy zoom_out_map[edit] user@R5# set protocols ospf area 0.0.0.4 interface ge-1/1/0
content_copy zoom_out_map[edit] user@R6# set protocols ospf area 0.0.0.4 interface ge-1/0/0
On R3, configure the import network summary policy.
content_copy zoom_out_map[edit ] user@R3# set policy-options policy-statement import-policy term term1 from route-filter 10.0.4.12/30 prefix-length-range /30-/30 user@R3# set policy-options policy-statement import-policy term term1 then accept
On R3, apply the import network summary policy to OSPF.
Note:For OSPFv3, include the
inter-area-prefix-exportstatement at the[edit protocols ospf3 area area-id]hierarchy level.content_copy zoom_out_map[edit] user@R3# set protocols ospf area 0.0.0.3 network-summary-import import-policy
If you are done configuring the devices, commit the configuration.
content_copy zoom_out_map[edit] user@host# commit
Results
Confirm your configuration by entering the show
interfaces, show policy-options, and show protocols
ospf commands on the appropriate device. If the output does
not display the intended configuration, repeat the instructions in
this example to correct the configuration.
Output for R1:
user@R1# show interfacesge-0/0/1 {
unit 0 {
family inet {
address 10.0.4.5/30;
}
}
}
ge-0/1/0 {
unit 0 {
family inet {
address 10.0.4.13/30;
}
}
}
user@R1# show protocols ospf
area 0.0.0.3 {
interface ge-0/1/0.0;
interface ge-0/0/1.0;
}
Output for R2:
user@R2# show interfaces
ge-0/1/0 {
unit 0 {
family inet {
address 10.0.4.6/30;
}
}
}
ge-1/0/0 {
unit 0 {
family inet {
address 10.0.4.1/30;
}
}
}
user@R2# show protocols ospf
area 0.0.0.3 {
interface ge-0/1/0.0;
interface ge-1/0/0.0;
}
Output for R3:
user@R3# show interfaces
ge-0/0/1 {
unit 0 {
family inet {
address 10.0.2.1/30;
}
}
}
ge-1/0/0 {
unit 0 {
family inet {
address 10.0.4.2/30;
}
}
}
ge-1/1/0 {
unit 0 {
family inet {
address 10.0.4.14/30;
}
}
}
user@R3# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/1.0;
}
area 0.0.0.3 {
network-summary-import import policy;
interface ge-1/0/0.0;
interface ge-1/1/0.0;
}
user@R3# show policy-options
policy-statement import-policy {
term term1 {
from {
route-filter 10.0.4.12/30 prefix-length-range /30-/30;
}
then accept;
}
term term2 {
then reject;
}
}
Output for R4:
user@R4# show interfaces
ge-0/0/1 {
unit 0 {
family inet {
address 10.0.2.1/30;
}
}
}
ge-1/0/0 {
unit 0 {
family inet {
address 10.0.8.9/30;
}
}
}
ge-1/1/0 {
unit 0 {
family inet {
address 10.0.8.6/30;
}
}
}
user@R4# show protocols ospf
area 0.0.0.0 {
interface ge-0/0/1.0;
}
area 0.0.0.4 {
interface ge-0/1/0.0;
interface ge-1/0/0.0;
}
Output for R5:
user@R5# show interfaces
ge-1/1/0 {
unit 0 {
family inet {
address 10.0.8.5/30;
}
}
}
user@R5# show protocols ospf
area 0.0.0.4 {
interface ge-1/1/0.0;
}
Output for R6:
user@R6# show interfaces
ge-1/0/0 {
unit 0 {
family inet {
address 10.0.8.10/30;
}
}
}
user@R6# show protocols ospf
area 0.0.0.4 {
interface ge-1/0/0.0;
}
To confirm your OSPFv3 configuration, enter the show interfaces, show policy-options, and show protocols ospf3 commands on the appropriate device.
Verification
Confirm that the configuration is working properly.
Verifying the OSPF Database
Purpose
Verify that the OSPF database for the devices in area 4 includes the interarea route that we are advertising from R3. Any other routes from area 3 should not be advertised into area 4, so those entries should age out or no longer be present in the OSPF database.
Action
From operational mode, enter the show ospf database
netsummary area 0.0.0.4 command for OSPFv2, and enter the show ospf3 database inter-area-prefix area 0.0.0.4 command
for OSPFv3.
Example: Redistributing OSPF Routes into IS-IS
This example shows how to redistribute OSPF routes into an IS-IS network.
Requirements
No special configuration beyond device initialization is required before configuring this example.
Overview
Export policy can be applied to IS-IS to facilitate route redistribution.
Junos OS does not support the application of import policy for link-state routing protocols like IS-IS because such policies can lead to inconsistent link-state database (LSDB) entries, which in turn can result in routing inconstancies.
In this example, OSPF routes 192.168.0/24 through 192.168.3/24 are redistributed into IS-IS area 49.0002 from Device R2.
In addition, policies are configured to ensure that Device R1 can reach destinations on the 10.0.0.44/30 network, and that Device R3 can reach destinations on the 10.0.0.36/30 network. This enables end-to-end reachability.
Figure 5 shows the topology used in this example.
CLI Quick Configuration shows the configuration for all of the devices in Figure 5. The section #d177e62__d177e232 describes the steps on Device R2. #d177e62__d177e361 describes the steps on Device R3.
Topology
Configuration
Procedure
CLI Quick Configuration
To quickly configure
this example, copy the following commands, paste them into a text
file, remove any line breaks, change any details necessary to match
your network configuration, and then copy and paste the commands into
the CLI at the [edit] hierarchy level.
Device R1
set interfaces fe-1/2/0 unit 0 description to-R7 set interfaces fe-1/2/0 unit 0 family inet address 10.0.0.38/30 set interfaces fe-1/2/0 unit 0 family iso set interfaces lo0 unit 0 family inet address 172.16.3.5/32 set interfaces lo0 unit 0 family iso address 49.0002.0172.0016.0305.00 set protocols isis interface fe-1/2/0.0 set protocols isis interface lo0.0
Device R2
set interfaces fe-1/2/1 unit 0 description to-R5 set interfaces fe-1/2/1 unit 0 family inet address 10.0.0.37/30 set interfaces fe-1/2/1 unit 0 family iso set interfaces fe-1/2/0 unit 0 description to-OSPF-network set interfaces fe-1/2/0 unit 0 family inet address 10.0.0.45/30 set interfaces lo0 unit 0 family inet address 172.16.9.7/32 set interfaces lo0 unit 0 family iso address 49.0002.0172.0016.0907.00 set protocols isis export ospf-isis set protocols isis export send-direct-to-isis-neighbors set protocols isis interface fe-1/2/1.0 set protocols isis interface lo0.0 set protocols ospf export send-direct-to-ospf-neighbors set protocols ospf area 0.0.0.1 interface fe-1/2/0.0 set protocols ospf area 0.0.0.1 interface lo0.0 passive set policy-options policy-statement ospf-isis term 1 from protocol ospf set policy-options policy-statement ospf-isis term 1 from route-filter 192.168.0.0/22 longer set policy-options policy-statement ospf-isis term 1 then accept set policy-options policy-statement send-direct-to-isis-neighbors from protocol direct set policy-options policy-statement send-direct-to-isis-neighbors from route-filter 10.0.0.44/30 exact set policy-options policy-statement send-direct-to-isis-neighbors then accept set policy-options policy-statement send-direct-to-ospf-neighbors from protocol direct set policy-options policy-statement send-direct-to-ospf-neighbors from route-filter 10.0.0.36/30 exact set policy-options policy-statement send-direct-to-ospf-neighbors then accept
Device R3
set interfaces fe-1/2/0 unit 0 family inet address 10.0.0.46/30 set interfaces lo0 unit 0 family inet address 192.168.1.1/32 set interfaces lo0 unit 0 family inet address 192.168.2.1/32 set interfaces lo0 unit 0 family inet address 192.168.3.1/32 set interfaces lo0 unit 0 family inet address 192.168.0.1/32 set protocols ospf export ospf set protocols ospf area 0.0.0.1 interface fe-1/2/0.0 set protocols ospf area 0.0.0.1 interface lo0.0 passive set policy-options policy-statement ospf term 1 from protocol static set policy-options policy-statement ospf term 1 then accept set routing-options static route 192.168.0.0/24 discard set routing-options static route 192.168.1.0/24 discard set routing-options static route 192.168.3.0/24 discard set routing-options static route 192.168.2.0/24 discard
Step-by-Step Procedure
To configure Device R2:
Configure the network interfaces.
content_copy zoom_out_map[edit interfaces] user@R2# set fe-1/2/1 unit 0 description to-R5 user@R2# set fe-1/2/1 unit 0 family inet address 10.0.0.37/30 user@R2# set fe-1/2/1 unit 0 family iso user@R2# set fe-1/2/0 unit 0 description to-OSPF-network user@R2# set fe-1/2/0 unit 0 family inet address 10.0.0.45/30 user@R2# set lo0 unit 0 family inet address 172.16.9.7/32 user@R2# set lo0 unit 0 family iso address 49.0002.0172.0016.0907.00
Configure IS-IS on the interface facing Device R1 and the loopback interface.
content_copy zoom_out_map[edit protocols isis] user@R2# set interface fe-1/2/1.0 user@R2# set interface lo0.0
Configure the policy that enables Device R1 to reach the 10.0.0.44/30 network.
content_copy zoom_out_map[edit policy-options policy-statement send-direct-to-isis-neighbors] user@R2# set from protocol direct user@R2# set from route-filter 10.0.0.44/30 exact user@R2# set then accept
Apply the policy that enables Device R1 to reach the 10.0.0.44/30 network.
content_copy zoom_out_map[edit protocols isis] user@R2# set export send-direct-to-isis-neighbors
Configure OSPF on the interfaces.
content_copy zoom_out_map[edit protocols ospf] user@R2# set area 0.0.0.1 interface fe-1/2/0.0 user@R2# set area 0.0.0.1 interface lo0.0 passive
Configure the OSPF route redistribution policy.
content_copy zoom_out_map[edit policy-options policy-statement ospf-isis term 1] user@R2# set from protocol ospf user@R2# set from route-filter 192.168.0.0/22 longer user@R2# set then accept
Apply the OSPF route redistribution policy to the IS-IS instance.
content_copy zoom_out_map[edit protocols isis] user@R2# set export ospf-isis
Configure the policy that enables Device R3 to reach the 10.0.0.36/30 network.
content_copy zoom_out_map[edit policy-options policy-statement send-direct-to-ospf-neighbors] user@R2# set from protocol direct user@R2# set from route-filter 10.0.0.36/30 exact user@R2# set then accept
Apply the policy that enables Device R3 to reach the 10.0.0.36/30 network.
content_copy zoom_out_map[edit protocols ospf] user@R2# set export send-direct-to-ospf-neighbors
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To configure multi-level IS-IS:
Configure the network interfaces.
Multiple addresses are configured on the loopback interface to simulate multiple route destinations.
content_copy zoom_out_map[edit interfaces] user@R3# set fe-1/2/0 unit 0 family inet address 10.0.0.46/30 user@R3# set lo0 unit 0 family inet address 192.168.1.1/32 user@R3# set lo0 unit 0 family inet address 192.168.2.1/32 user@R3# set lo0 unit 0 family inet address 192.168.3.1/32 user@R3# set lo0 unit 0 family inet address 192.168.0.1/32
Configure static routes to the loopback interface addresses.
These are the routes that are redistributed into IS-IS.
content_copy zoom_out_map[edit routing-options static] user@R3# set route 192.168.0.0/24 discard user@R3# set route 192.168.1.0/24 discard user@R3# set route 192.168.3.0/24 discard user@R3# set route 192.168.2.0/24 discard
Configure OSPF on the interfaces.
content_copy zoom_out_map[edit protocols ospf area 0.0.0.1] user@R3# set interface fe-1/2/0.0 user@R3# set interface lo0.0 passive
Configure the OSPF policy to export the static routes.
content_copy zoom_out_map[edit policy-options policy-statement ospf term 1] user@R3# set from protocol static user@R3# set then accept
Apply the OSPF export policy.
content_copy zoom_out_map[edit protocols ospf] user@R3# set export ospf
Results
From configuration mode, confirm your configuration
by entering the show interfaces, show protocols, show policy-options, and show routing-options commands. If the output does not display the intended configuration,
repeat the instructions in this example to correct the configuration.
Device R2
user@R2# show interfaces
fe-1/2/1 {
unit 0 {
description to-R5;
family inet {
address 10.0.0.37/30;
}
family iso;
}
}
fe-1/2/0 {
unit 0 {
description to-OSPF-network;
family inet {
address 10.0.0.45/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 172.16.9.7/32;
}
family iso {
address 49.0002.0172.0016.0907.00;
}
}
}
user@R2# show protocols
isis {
export [ ospf-isis send-direct-to-isis-neighbors ];
interface fe-1/2/1.0;
interface lo0.0;
}
ospf {
export send-direct-to-ospf-neighbors;
area 0.0.0.1 {
interface fe-1/2/0.0;
interface lo0.0 {
passive;
}
}
}
user@R2# show policy-options
policy-statement ospf-isis {
term 1 {
from {
protocol ospf;
route-filter 192.168.0.0/22 longer;
}
then accept;
}
}
policy-statement send-direct-to-isis-neighbors {
from {
protocol direct;
route-filter 10.0.0.44/30 exact;
}
then accept;
}
policy-statement send-direct-to-ospf-neighbors {
from {
protocol direct;
route-filter 10.0.0.36/30 exact;
}
then accept;
}
Device R3
user@R3# show interfaces
fe-1/2/0 {
unit 0 {
family inet {
address 10.0.0.46/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 192.168.1.1/32;
address 192.168.2.1/32;
address 192.168.3.1/32;
address 192.168.0.1/32;
}
}
}
user@R3# show protocols
ospf {
export ospf;
area 0.0.0.1 {
interface fe-1/2/0.0;
interface lo0.0 {
passive;
}
}
}
user@R3# show policy-options
policy-statement ospf {
term 1 {
from protocol static;
then accept;
}
}
user@R3# show routing-options
static {
route 192.168.0.0/24 discard;
route 192.168.1.0/24 discard;
route 192.168.3.0/24 discard;
route 192.168.2.0/24 discard;
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
Verifying OSPF Route Advertisement
Purpose
Make sure that the expected routes are advertised by OSPF.
Action
From operational mode on Device R2, enter the show
route protocol ospf command.
user@R2> show route protocol ospf
inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
192.168.0.0/24 *[OSPF/150] 03:54:21, metric 0, tag 0
> to 10.0.0.46 via fe-1/2/0.0
192.168.0.1/32 *[OSPF/10] 03:54:21, metric 1
> to 10.0.0.46 via fe-1/2/0.0
192.168.1.0/24 *[OSPF/150] 03:54:21, metric 0, tag 0
> to 10.0.0.46 via fe-1/2/0.0
192.168.1.1/32 *[OSPF/10] 03:54:21, metric 1
> to 10.0.0.46 via fe-1/2/0.0
192.168.2.0/24 *[OSPF/150] 03:54:21, metric 0, tag 0
> to 10.0.0.46 via fe-1/2/0.0
192.168.2.1/32 *[OSPF/10] 03:54:21, metric 1
> to 10.0.0.46 via fe-1/2/0.0
192.168.3.0/24 *[OSPF/150] 03:54:21, metric 0, tag 0
> to 10.0.0.46 via fe-1/2/0.0
192.168.3.1/32 *[OSPF/10] 03:54:21, metric 1
> to 10.0.0.46 via fe-1/2/0.0
224.0.0.5/32 *[OSPF/10] 03:56:03, metric 1
MultiRecv
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)Meaning
The 192.168/16 routes are advertised by OSPF.
Verifying Route Redistribution
Purpose
Make sure that the expected routes are redistributed from OSPF into IS-IS.
Action
From operational mode on Device R1, enter the show
route protocol isis command.
user@R1> show route protocol isis
inet.0: 13 destinations, 13 routes (13 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.0.44/30 *[IS-IS/160] 03:45:24, metric 20
> to 10.0.0.37 via fe-1/2/0.0
172.16.9.7/32 *[IS-IS/15] 03:49:46, metric 10
> to 10.0.0.37 via fe-1/2/0.0
192.168.0.0/24 *[IS-IS/160] 03:49:46, metric 10
> to 10.0.0.37 via fe-1/2/0.0
192.168.0.1/32 *[IS-IS/160] 03:49:46, metric 11, tag2 1
> to 10.0.0.37 via fe-1/2/0.0
192.168.1.0/24 *[IS-IS/160] 03:49:46, metric 10
> to 10.0.0.37 via fe-1/2/0.0
192.168.1.1/32 *[IS-IS/160] 03:49:46, metric 11, tag2 1
> to 10.0.0.37 via fe-1/2/0.0
192.168.2.0/24 *[IS-IS/160] 03:49:46, metric 10
> to 10.0.0.37 via fe-1/2/0.0
192.168.2.1/32 *[IS-IS/160] 03:49:46, metric 11, tag2 1
> to 10.0.0.37 via fe-1/2/0.0
192.168.3.0/24 *[IS-IS/160] 03:49:46, metric 10
> to 10.0.0.37 via fe-1/2/0.0
192.168.3.1/32 *[IS-IS/160] 03:49:46, metric 11, tag2 1
> to 10.0.0.37 via fe-1/2/0.0
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)Meaning
The 192.168/16 routes are redistributed into IS-IS.
Verifying Connectivity
Purpose
Check that Device R1 can reach the destinations on Device R3.
Action
From operational mode, enter the ping command.
user@R1> ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1): 56 data bytes 64 bytes from 192.168.1.1: icmp_seq=0 ttl=63 time=2.089 ms 64 bytes from 192.168.1.1: icmp_seq=1 ttl=63 time=1.270 ms 64 bytes from 192.168.1.1: icmp_seq=2 ttl=63 time=2.135 ms
Meaning
These results confirm that Device R1 can reach the destinations in the OSPF network.
Change History Table
Feature support is determined by the platform and release you are using. Use Feature Explorer to determine if a feature is supported on your platform.
