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Example: Configuring Backup Selection Policy for IS-IS Protocol
This example shows how to configure the backup selection policy for the IS-IS protocol.
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, neighbor, and neighbor-tag.
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, and T Series Core Routers
Junos OS Release 14.1 or later running on all devices
Before you begin:
Configure the device interfaces.
Configure IS-IS.
Overview
Starting with Junos OS Release 14.1, 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, neighbor, and neighbor-tag 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, backup selection policy is configured on Device R3.
Figure 1: Backup Selection Path
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,
and then copy and paste the commands into the CLI at the [edit] hierarchy level.
R0
set interfaces ge-4/0/1 unit 0 family inet address 100.0.1.1/24 set interfaces ge-4/0/1 unit 0 family iso set interfaces ge-4/0/1 unit 0 family inet6 address 2001:100:0:1::1/64 set interfaces ge-4/0/1 unit 0 family mpls set interfaces ge-0/2/1 unit 0 family inet address 100.0.4.1/24 set interfaces ge-0/2/1 unit 0 family iso set interfaces ge-0/2/1 unit 0 family inet6 address 2001:100:0:4::1/64 set interfaces ge-0/2/1 unit 0 family mpls set interfaces ge-1/3/1 unit 0 family inet address 100.0.5.1/24 set interfaces ge-1/3/1 unit 0 family iso set interfaces ge-1/3/1 unit 0 family inet6 address 2001:100:0:5::1/64 set interfaces ge-1/3/1 unit 0 family mpls set interfaces ge-1/3/0 unit 0 family inet address 100.0.6.1/24 set interfaces ge-1/3/0 unit 0 family iso set interfaces ge-1/3/0 unit 0 family inet6 address 2001:100:0:6::1/64 set interfaces ge-1/3/0 unit 0 family mpls set interfaces ge-0/2/7 unit 0 family inet address 100.0.7.1/24 set interfaces ge-0/2/7 unit 0 family iso set interfaces ge-0/2/7 unit 0 family inet6 address 2001:100:0:7::1/64 set interfaces ge-0/2/7 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.146/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1001.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:146/128 set interfaces lo0 unit 0 family mpls 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 isis interface ge-4/0/1 level 2 metric 10 set protocols isis interface ge-0/2/1 level 2 metric 18 set protocols isis interface ge-1/3/1 level 2 metric 51 set protocols isis interface ge-1/3/0 level 2 metric 52 set protocols isis interface ge-0/2/7 level 2 metric 23 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R1
set interfaces ge-0/1/2 unit 0 family inet address 100.0.1.2/24 set interfaces ge-0/1/2 unit 0 family iso set interfaces ge-0/1/2 unit 0 family inet6 address 2001:100:0:1::2/64 set interfaces ge-0/1/2 unit 0 family mpls set interfaces ge-3/0/1 unit 0 family inet address 100.1.2.1/24 set interfaces ge-3/0/1 unit 0 family iso set interfaces ge-3/0/1 unit 0 family inet6 address 2001:100:1:2::1/64 set interfaces ge-3/0/1 unit 0 family mpls set interfaces ge-3/1/1 unit 0 family inet address 100.1.4.1/24 set interfaces ge-3/1/1 unit 0 family iso set interfaces ge-3/1/1 unit 0 family inet6 address 2001:100:1:4::1/64 set interfaces ge-3/1/1 unit 0 family mpls set interfaces ge-3/0/2 unit 0 family inet address 100.1.7.1/24 set interfaces ge-3/0/2 unit 0 family iso set interfaces ge-3/0/2 unit 0 family inet6 address 2001:100:1:7::1/64 set interfaces ge-3/0/2 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.156/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1002.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:156/128 set interfaces lo0 unit 0 family mpls 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-0/1/2 srlg srlg9 set protocols mpls interface ge-0/1/2 admin-group c1 set protocols mpls interface ge-0/1/2 admin-group c2 set protocols mpls interface ge-0/1/2 admin-group c6 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R2
set interfaces ge-1/3/3 unit 0 family inet address 100.1.2.2/24 set interfaces ge-1/3/3 unit 0 family iso set interfaces ge-1/3/3 unit 0 family inet6 address 2001:100:1:2::2/64 set interfaces ge-1/3/3 unit 0 family mpls set interfaces ge-1/0/2 unit 0 family inet address 100.2.3.1/24 set interfaces ge-1/0/2 unit 0 family iso set interfaces ge-1/0/2 unit 0 family inet6 address 2001:100:2:3::1/64 set interfaces ge-1/0/2 unit 0 family mpls set interfaces ge-1/2/5 unit 0 family inet address 100.2.4.1/24 set interfaces ge-1/2/5 unit 0 family iso set interfaces ge-1/2/5 unit 0 family inet6 address 2001:100:2:4::1/64 set interfaces ge-1/2/5 unit 0 family mpls set interfaces ge-1/3/9 unit 0 family inet address 100.2.5.1/24 set interfaces ge-1/3/9 unit 0 family iso set interfaces ge-1/3/9 unit 0 family inet6 address 2001:100:2:5::1/64 set interfaces ge-2/3/1 unit 0 family inet address 100.2.6.1/24 set interfaces ge-2/3/1 unit 0 family iso set interfaces ge-2/3/1 unit 0 family inet6 address 2001:100:2:6::1/64 set interfaces ge-2/3/1 unit 0 family mpls set interfaces ge-1/0/8 unit 0 family inet address 100.2.7.1/24 set interfaces ge-1/0/8 unit 0 family iso set interfaces ge-1/0/8 unit 0 family inet6 address 2001:100:2:7::1/64 set interfaces ge-1/0/8 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.178/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1003.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:178/128 set interfaces lo0 unit 0 family mpls 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-1/0/2 srlg srlg1 set protocols mpls interface ge-1/3/9 srlg srlg1 set protocols mpls interface ge-1/3/9 srlg srlg2 set protocols mpls interface ge-2/3/1 srlg srlg1 set protocols mpls interface ge-1/0/8 srlg srlg7 set protocols isis interface ge-1/0/2 link-protection set protocols isis interface ge-1/2/5 level 2 metric 12 set protocols isis interface ge-2/3/1 level 2 metric 12 set protocols isis interface ge-1/0/8 level 2 metric 13 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R3
set interfaces ge-1/3/5 unit 0 family inet address 100.2.3.2/24 set interfaces ge-1/3/5 unit 0 family iso set interfaces ge-1/3/5 unit 0 family inet6 address 2001:100:2:3::2/64 set interfaces ge-1/3/5 unit 0 family mpls set interfaces ge-0/3/1 unit 0 family inet address 100.3.4.1/24 set interfaces ge-0/3/1 unit 0 family iso set interfaces ge-0/3/1 unit 0 family inet6 address 2001:100:3:4::1/64 set interfaces ge-0/3/1 unit 0 family mpls set interfaces ge-0/3/6 unit 0 family inet address 100.3.5.1/24 set interfaces ge-0/3/6 unit 0 family iso set interfaces ge-0/3/6 unit 0 family inet6 address 2001:100:3:5::1/64 set interfaces ge-0/3/6 unit 0 family mpls set interfaces ge-2/0/4 unit 0 family inet address 100.3.6.1/24 set interfaces ge-2/0/4 unit 0 family iso set interfaces ge-2/0/4 unit 0 family inet6 address 2001:100:3:6::1/64 set interfaces ge-2/0/4 unit 0 family mpls set interfaces ge-1/1/0 unit 0 family inet address 100.3.7.1/24 set interfaces ge-1/1/0 unit 0 family iso set interfaces ge-1/1/0 unit 0 family inet6 address 2001:100:3:7::1/64 set interfaces ge-1/1/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.128/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1004.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:128/128 set interfaces lo0 unit 0 family mpls set policy-options policy-statement ecmp term 1 then load-balance per-packet 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-0/3/1 srlg srlg1 set protocols mpls interface ge-0/3/1 srlg srlg2 set protocols mpls interface ge-0/3/1 admin-group c1 set protocols mpls interface ge-0/3/1 admin-group c2 set protocols mpls interface ge-0/3/1 admin-group c3 set protocols mpls interface ge-0/3/1 admin-group c5 set protocols mpls interface ge-0/3/6 admin-group c1 set protocols mpls interface ge-0/3/6 admin-group c2 set protocols mpls interface ge-2/0/4 admin-group c1 set protocols mpls interface ge-2/0/4 admin-group c2 set protocols mpls interface ge-2/0/4 admin-group c5 set protocols mpls interface ge-1/1/0 admin-group c2 set protocols mpls interface ge-1/1/0 admin-group c12 set protocols isis interface ge-1/3/5 link-protection set protocols isis interface ge-0/3/1 level 2 metric 21 set protocols isis interface ge-0/3/6 level 2 metric 13 set protocols isis interface ge-2/0/4 level 2 metric 15 set protocols isis interface ge-1/1/0 level 2 metric 22 set protocols isis interface all level 2 metric 10 set routing-options forwarding-table export ecmp set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112 set routing-options backup-selection destination 0.0.0.0/0 interface all admin-group include-all c1 set routing-options backup-selection destination 0.0.0.0/0 interface all admin-group include-any c2 set routing-options backup-selection destination 0.0.0.0/0 interface all admin-group preference c3 set routing-options backup-selection destination 0.0.0.0/0 interface all srlg loose set routing-options backup-selection destination 0.0.0.0/0 interface all downstream-paths-only set routing-options backup-selection destination 0.0.0.0/0 interface all bandwidth-greater-equal-primary set routing-options backup-selection destination 0.0.0.0/0 interface all neighbor preference 10.255.102.178 set routing-options backup-selection destination 0.0.0.0/0 interface all neighbor-tag preference 1004 set routing-options backup-selection destination 0.0.0.0/0 interface all metric-order dest set routing-options backup-selection destination 0.0.0.0/0 interface all evaluation-order admin-group set routing-options backup-selection destination 0.0.0.0/0 interface all evaluation-order srlg set routing-options backup-selection destination 0.0.0.0/0 interface all evaluation-order bandwidth set routing-options backup-selection destination 100.0.1.0/24 interface all srlg strict set routing-options backup-selection destination 100.0.1.0/24 interface all bandwidth-greater-equal-primary set routing-options backup-selection destination 100.0.7.0/24 interface all srlg strict
R4
set interfaces ge-2/1/7 unit 0 family inet address 100.0.4.2/24 set interfaces ge-2/1/7 unit 0 family iso set interfaces ge-2/1/7 unit 0 family inet6 address 2001:100:0:4::2/64 set interfaces ge-2/1/7 unit 0 family mpls set interfaces ge-2/1/5 unit 0 family inet address 100.1.4.2/24 set interfaces ge-2/1/5 unit 0 family iso set interfaces ge-2/1/5 unit 0 family inet6 address 2001:100:1:4::2/64 set interfaces ge-2/1/5 unit 0 family mpls set interfaces ge-8/0/0 unit 0 family inet address 100.2.4.2/24 set interfaces ge-8/0/0 unit 0 family iso set interfaces ge-8/0/0 unit 0 family inet6 address 2001:100:2:4::2/64 set interfaces ge-8/0/0 unit 0 family mpls set interfaces ge-2/2/0 unit 0 family inet address 100.3.4.2/24 set interfaces ge-2/2/0 unit 0 family iso set interfaces ge-2/2/0 unit 0 family inet6 address 2001:100:3:4::2/64 set interfaces ge-2/2/0 unit 0 family mpls set interfaces ge-2/2/3 unit 0 family inet address 100.4.5.1/24 set interfaces ge-2/2/3 unit 0 family iso set interfaces ge-2/2/3 unit 0 family inet6 address 2001:100:4:5::1/64 set interfaces ge-2/2/3 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.172/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1005.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:172/128 set interfaces lo0 unit 0 family mpls 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-2/1/7 srlg srlg1 set protocols mpls interface ge-2/1/7 srlg srlg2 set protocols mpls interface ge-2/1/7 srlg srlg3 set protocols mpls interface ge-2/1/7 admin-group c1 set protocols mpls interface ge-2/1/7 admin-group c2 set protocols mpls interface ge-2/1/7 admin-group c6 set protocols mpls interface ge-2/1/7 admin-group c13 set protocols isis interface ge-2/1/7 level 2 metric 18 set protocols isis interface ge-8/0/0 level 2 metric 12 set protocols isis interface ge-2/2/0 level 2 metric 21 set protocols isis interface ge-2/2/3 level 2 metric 10 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R5
set interfaces ge-3/0/1 unit 0 family inet address 100.0.5.2/24 set interfaces ge-3/0/1 unit 0 family iso set interfaces ge-3/0/1 unit 0 family inet6 address 2001:100:0:5::2/64 set interfaces ge-3/0/1 unit 0 family mpls set interfaces ge-3/2/4 unit 0 family inet address 100.2.5.2/24 set interfaces ge-3/2/4 unit 0 family iso set interfaces ge-3/2/4 unit 0 family inet6 address 2001:100:2:5::2/64 set interfaces ge-3/2/4 unit 0 family mpls set interfaces ge-0/1/5 unit 0 family inet address 100.3.5.2/24 set interfaces ge-0/1/5 unit 0 family iso set interfaces ge-0/1/5 unit 0 family inet6 address 2001:100:3:5::2/64 set interfaces ge-0/1/5 unit 0 family mpls set interfaces ge-3/1/0 unit 0 family inet address 100.4.5.2/24 set interfaces ge-3/1/0 unit 0 family iso set interfaces ge-3/1/0 unit 0 family inet6 address 2001:100:4:5::2/64 set interfaces ge-3/1/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.166/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1006.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:166/128 set interfaces lo0 unit 0 family mpls 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-3/1/0 admin-group c1 set protocols mpls interface ge-3/1/0 admin-group c2 set protocols mpls interface ge-3/1/0 admin-group c4 set protocols mpls interface ge-3/0/1 srlg srlg3 set protocols mpls interface ge-3/0/1 srlg srlg4 set protocols isis interface ge-3/0/1 level 2 metric 51 set protocols isis interface ge-0/1/5 level 2 metric 13 set protocols isis interface ge-3/1/0 level 2 metric 10 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R6
set interfaces ge-0/0/6 unit 0 family inet address 100.0.6.2/24 set interfaces ge-0/0/6 unit 0 family iso set interfaces ge-0/0/6 unit 0 family inet6 address 2001:100:0:6::2/64 set interfaces ge-0/0/6 unit 0 family mpls set interfaces ge-3/0/1 unit 0 family inet address 100.2.6.2/24 set interfaces ge-3/0/1 unit 0 family iso set interfaces ge-3/0/1 unit 0 family inet6 address 2001:100:2:6::2/64 set interfaces ge-3/0/1 unit 0 family mpls set interfaces ge-0/0/4 unit 0 family inet address 100.3.6.2/24 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family inet6 address 2001:100:3:6::2/64 set interfaces ge-0/0/4 unit 0 family mpls set interfaces ge-2/0/1 unit 0 family inet address 100.6.7.1/24 set interfaces ge-2/0/1 unit 0 family iso set interfaces ge-2/0/1 unit 0 family inet6 address 2001:100:6:7::1/64 set interfaces ge-2/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.154/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1007.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:154/128 set interfaces lo0 unit 0 family mpls 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-2/0/1 srlg srlg2 set protocols mpls interface ge-2/0/1 srlg srlg3 set protocols mpls interface ge-2/0/1 srlg srlg4 set protocols mpls interface ge-2/0/1 srlg srlg5 set protocols mpls interface ge-2/0/1 admin-group c1 set protocols mpls interface ge-2/0/1 admin-group c2 set protocols mpls interface ge-2/0/1 admin-group c5 set protocols mpls interface ge-2/0/1 admin-group c11 set protocols isis interface ge-0/0/6 level 2 metric 52 set protocols isis interface ge-3/0/1 level 2 metric 12 set protocols isis interface ge-0/0/4 level 2 metric 15 set protocols isis interface ge-2/0/1 level 2 metric 10 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
R7
set interfaces ge-2/1/0 unit 0 family inet address 100.0.7.2/24 set interfaces ge-2/1/0 unit 0 family iso set interfaces ge-2/1/0 unit 0 family inet6 address 2001:100:0:7::2/64 set interfaces ge-2/1/0 unit 0 family mpls set interfaces ge-2/3/9 unit 0 family inet address 100.1.7.2/24 set interfaces ge-2/3/9 unit 0 family iso set interfaces ge-2/3/9 unit 0 family inet6 address 2001:100:1:7::2/64 set interfaces ge-2/3/9 unit 0 family mpls set interfaces ge-2/1/7 unit 0 family inet address 100.2.7.2/24 set interfaces ge-2/1/7 unit 0 family iso set interfaces ge-2/1/7 unit 0 family inet6 address 2001:100:2:7::2/64 set interfaces ge-2/1/7 unit 0 family mpls set interfaces ge-2/2/2 unit 0 family inet address 100.3.7.2/24 set interfaces ge-2/2/2 unit 0 family iso set interfaces ge-2/2/2 unit 0 family inet6 address 2001:100:3:7::2/64 set interfaces ge-2/2/2 unit 0 family mpls set interfaces ge-2/3/0 unit 0 family inet address 100.6.7.2/24 set interfaces ge-2/3/0 unit 0 family iso set interfaces ge-2/3/0 unit 0 family inet6 address 2001:100:6:7::2/64 set interfaces ge-2/3/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.180/32 set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1008.00 set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:180/128 set interfaces lo0 unit 0 family mpls 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-2/3/9 srlg srlg8 set protocols mpls interface ge-2/3/9 admin-group c1 set protocols mpls interface ge-2/3/9 admin-group c2 set protocols mpls interface ge-2/3/9 admin-group c7 set protocols isis interface ge-2/1/0 level 2 metric 23 set protocols isis interface ge-2/1/7 level 2 metric 13 set protocols isis interface ge-2/2/2 level 2 metric 22 set protocols isis interface all level 2 metric 10 set routing-options srlg srlg1 srlg-value 101 set routing-options srlg srlg2 srlg-value 102 set routing-options srlg srlg3 srlg-value 103 set routing-options srlg srlg4 srlg-value 104 set routing-options srlg srlg5 srlg-value 105 set routing-options srlg srlg6 srlg-value 106 set routing-options srlg srlg7 srlg-value 107 set routing-options srlg srlg8 srlg-value 108 set routing-options srlg srlg9 srlg-value 109 set routing-options srlg srlg10 srlg-value 110 set routing-options srlg srlg11 srlg-value 111 set routing-options srlg srlg12 srlg-value 112
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 Junos OS CLI User Guide.
To configure Device R3:
Configure the interfaces.
[edit interfaces] user@R3# set ge-1/3/5 unit 0 family inet address 100.2.3.2/24 user@R3# set ge-1/3/5 unit 0 family iso user@R3# set ge-1/3/5 unit 0 family inet6 address 2001:100:2:3::2/64 user@R3# set ge-1/3/5 unit 0 family mpls user@R3# set ge-0/3/1 unit 0 family inet address 100.3.4.1/24 user@R3# set ge-0/3/1 unit 0 family iso user@R3# set ge-0/3/1 unit 0 family inet6 address 2001:100:3:4::1/64 user@R3# set ge-0/3/1 unit 0 family mpls user@R3# set ge-0/3/6 unit 0 family inet address 100.3.5.1/24 user@R3# set ge-0/3/6 unit 0 family iso user@R3# set ge-0/3/6 unit 0 family inet6 address 2001:100:3:5::1/64 user@R3# set ge-0/3/6 unit 0 family mpls user@R3# set ge-2/0/4 unit 0 family inet address 100.3.6.1/24 user@R3# set ge-2/0/4 unit 0 family iso user@R3# set ge-2/0/4 unit 0 family inet6 address 2001:100:3:6::1/64 user@R3# set ge-2/0/4 unit 0 family mpls user@R3# set ge-1/1/0 unit 0 family inet address 100.3.7.1/24 user@R3# set ge-1/1/0 unit 0 family iso user@R3# set ge-1/1/0 unit 0 family inet6 address 2001:100:3:7::1/64 user@R3# set ge-1/1/0 unit 0 family mpls user@R3# set interfaces lo0 unit 0 family inet address 10.255.102.128/32 user@R3# set interfaces lo0 unit 0 family iso address 49.0001.0010.0100.1004.00 user@R3# set interfaces lo0 unit 0 family inet6 address abcd::10:255:102:128/128 user@R3# set interfaces lo0 unit 0 family mpls
Configure routing policy.
[edit policy-options] user@R3#set policy-statement ecmp term 1 then load-balance per-packet
Enable RSVP on all the interfaces.
[edit protocols] user@R3# set rsvp interface all
Configure administrative groups.
[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 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
Configure srlg values.
[edit routing-options] user@R3# set srlg srlg1 srlg-value 101 user@R3# set srlg srlg2 srlg-value 102 user@R3# set srlg srlg3 srlg-value 103 user@R3# set srlg srlg4 srlg-value 104 user@R3# set srlg srlg5 srlg-value 105 user@R3# set srlg srlg6 srlg-value 106 user@R3# set srlg srlg7 srlg-value 107 user@R3# set srlg srlg8 srlg-value 108 user@R3# set srlg srlg9 srlg-value 109 user@R3# set srlg srlg10 srlg-value 110 user@R3# set srlg srlg11 srlg-value 111 user@R3# set srlg srlg12 srlg-value 112
Enable MPLS on all the interfaces.
[edit protocols mpls] user@R3# set interface all
Configure srlg on the interfaces.
[edit protocols mpls] user@R3# set interface ge-0/3/1 srlg srlg1 user@R3# set interface ge-0/3/1 srlg srlg2
Configure administrative groups on the interfaces.
[edit protocols mpls] user@R3# set interface ge-0/3/1 admin-group c1 user@R3# set interface ge-0/3/1 admin-group c2 user@R3# set interface ge-0/3/1 admin-group c3 user@R3# set interface ge-0/3/1 admin-group c5 user@R3# set interface ge-0/3/6 admin-group c1 user@R3# set interface ge-0/3/6 admin-group c2 user@R3# set interface ge-2/0/4 admin-group c1 user@R3# set interface ge-2/0/4 admin-group c2 user@R3# set interface ge-2/0/4 admin-group c5 user@R3# set interface ge-1/1/0 admin-group c2 user@R3# set interface ge-1/1/0 admin-group c12
Enable link protection and configure metric values on the interfaces.
[edit protocols] user@R3# set isis interface ge-1/3/5 link-protection user@R3# set isis interface ge-0/3/1 level 2 metric 21 user@R3# set isis interface ge-0/3/6 level 2 metric 13 user@R3# set isis interface ge-2/0/4 level 2 metric 15 user@R3# set isis interface ge-1/1/0 level 2 metric 22
Configure the metric value on all the interfaces.
[edit protocols] user@R3# set isis interface all level 2 metric 10
Apply the routing policy to all equal cost multi paths exported from the routing table to the forwarding table.
[edit routing-options] user@R3# set forwarding-table export ecmp
Configure attributes of the backup selection policy.
[edit routing-options] user@R3# set backup-selection destination 0.0.0.0/0 interface all admin-group include-all c1 user@R3# set backup-selection destination 0.0.0.0/0 interface all admin-group include-any c2 user@R3# set backup-selection destination 0.0.0.0/0 interface all admin-group preference c3 user@R3# set backup-selection destination 0.0.0.0/0 interface all srlg loose user@R3# set backup-selection destination 0.0.0.0/0 interface all downstream-paths-only user@R3# set backup-selection destination 0.0.0.0/0 interface all bandwidth-greater-equal-primary user@R3# set backup-selection destination 0.0.0.0/0 interface all neighbor preference 10.255.102.178 user@R3# set backup-selection destination 0.0.0.0/0 interface all neighbor-tag preference 1004 user@R3# set backup-selection destination 0.0.0.0/0 interface all metric-order dest user@R3# set backup-selection destination 0.0.0.0/0 interface all evaluation-order admin-group user@R3# set backup-selection destination 0.0.0.0/0 interface all evaluation-order srlg user@R3# set backup-selection destination 0.0.0.0/0 interface all evaluation-order bandwidth user@R3# set backup-selection destination 100.0.1.0/24 interface all srlg strict user@R3# set backup-selection destination 100.0.1.0/24 interface all bandwidth-greater-equal-primary user@R3# set backup-selection destination 100.0.7.0/24 interface all srlg strict
Results
From configuration mode, confirm your configuration
by entering the show interfaces, show protocols, 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-1/3/5 {
unit 0 {
family inet {
address 100.2.3.2/24;
}
family iso;
family inet6 {
address 2001:100:2:3::2/64;
}
family mpls;
}
}
ge-0/3/1 {
unit 0 {
family inet {
address 100.3.4.1/24;
}
family iso;
family inet6{
address 2001:100:3:4::1/64;
}
family mpls;
}
}
ge-0/3/6 {
unit 0 {
family inet {
address 100.3.5.1/24;
}
family iso;
family inet6{
address 2001:100:3:5::1/64;
}
family mpls;
}
}
ge-2/0/4 {
unit 0 {
family inet {
address 100.3.6.1/24;
}
family iso;
family inet6{
address 2001:100:3:6::1/64;
}
family mpls;
}
}
ge-1/1/0 {
unit 0 {
family inet {
address 100.3.7.1/24;
}
family iso;
family inet6{
address 2001:100:3:7::1/64;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.102.128/32;
}
family iso {
address 49.0001.0010.0100.1004.00;
}
family inet6{
address abcd::10:255:102:128/128;
}
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-0/3/1 {
srlg [ srlg1 srlg2 ];
admin-group [ c1 c2 c3 c5 ];
}
interface ge-0/3/6 {
admin-group [ c1 c2 ];
}
interface ge-2/0/4 {
admin-group [ c1 c2 c5 ];
}
interface ge-1/1/0 {
admin-group [ c2 c12 ];
}
isis {
interface ge-1/3/5 {
link-protection;
}
interface ge-0/3/1 {
level 2 metric 21;
}
interface ge-0/3/6 {
level 2 metric 13;
}
interface ge-2/0/4 {
level 2 metric 15;
}
interface ge-1/1/0 {
level 2 metric 22;
}
interface all {
level 2 metric 10;
}
}
user@R3# show routing-options
srlg {
srlg1 {
srlg-value 101;
}
srlg2 {
srlg-value 102;
}
srlg3 {
srlg-value 103;
}
srlg4 {
srlg-value 104;
}
srlg5 {
srlg-value 105;
}
srlg6 {
srlg-value 106;
}
srlg7 {
srlg-value 107;
}
srlg8 {
srlg-value 108;
}
srlg9 {
srlg-value 109;
}
srlg10 {
srlg-value 110;
}
srlg111 {
srlg-value 111;
}
srlg112 {
srlg-value 112;
}
}
backup-selection {
destination 0.0.0.0/0 {
interface all {
admin-group {
include-all c1;
include-any c2;
preference c3;
}
srlg loose;
downstream-paths-only;
bandwidth-greater-equal-primary;
neighbor {
preference 10.255.102.178;
}
neighbor-tag {
preference 1004;
}
metric-order dest;
evaluation-order [ admin-group srlg bandwidth ];
}
}
destination 100.0.1.0/24 {
interface all {
srlg strict;
bandwidth-greater-equal-primary;
}
}
destination 100.0.7.0/24 {
interface all {
srlg strict;
}
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Verify that the configuration is working properly.
- Verifying the Routes
- Verifying the IS-IS Route
- Verifying the Backup SPF Roots for Device R3.
- 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: 32 destinations, 32 routes (32 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.102.128/32 *[Direct/0] 1w0d 04:14:44
> via lo0.31
10.255.102.146/32 *[IS-IS/18] 6d 07:19:57, metric 40
> to 100.2.3.1 via ge-1/3/5.0
to 100.3.4.2 via ge-0/3/1.0
10.255.102.154/32 *[IS-IS/18] 1w0d 04:12:02, metric 25
> to 100.3.6.2 via ge-2/0/4.0
10.255.102.156/32 *[IS-IS/18] 06:38:55, metric 30
> to 100.2.3.1 via ge-1/3/5.0
to 100.3.6.2 via ge-2/0/4.0
10.255.102.166/32 *[IS-IS/18] 1w0d 04:11:57, metric 23
> to 100.3.5.2 via ge-0/3/6.0
10.255.102.172/32 *[IS-IS/18] 1w0d 04:12:03, metric 31
> to 100.3.4.2 via ge-0/3/1.0
10.255.102.178/32 *[IS-IS/18] 06:38:55, metric 20
> to 100.2.3.1 via ge-1/3/5.0
10.255.102.180/32 *[IS-IS/18] 1w0d 04:12:51, metric 32
> to 100.3.7.2 via ge-1/1/0.0
100.0.1.0/24 *[IS-IS/18] 1w0d 04:11:57, metric 30
> to 100.2.3.1 via ge-1/3/5.0
to 100.3.4.2 via ge-0/3/1.0
100.0.4.0/24 *[IS-IS/18] 1w0d 04:12:03, metric 39
> to 100.3.4.2 via ge-0/3/1.0
100.0.5.0/24 *[IS-IS/18] 1w0d 04:11:57, metric 64
> to 100.3.5.2 via ge-0/3/6.0
100.0.6.0/24 *[IS-IS/18] 1w0d 04:12:02, metric 67
> to 100.3.6.2 via ge-2/0/4.0
100.0.7.0/24 *[IS-IS/18] 1w0d 04:12:51, metric 45
> to 100.3.7.2 via ge-1/1/0.0
100.1.2.0/24 *[IS-IS/18] 06:38:55, metric 20
> to 100.2.3.1 via ge-1/3/5.0
100.1.4.0/24 *[IS-IS/18] 06:38:55, metric 30
> to 100.2.3.1 via ge-1/3/5.0
to 100.3.6.2 via ge-2/0/4.0
100.1.7.0/24 *[IS-IS/18] 06:38:55, metric 30
> to 100.2.3.1 via ge-1/3/5.0
to 100.3.6.2 via ge-2/0/4.0
100.2.3.0/24 *[Direct/0] 1w0d 04:13:11
> via ge-1/3/5.0
100.2.3.2/32 *[Local/0] 1w0d 04:13:11
Local via ge-1/3/5.0
100.2.4.0/24 *[IS-IS/18] 06:38:55, metric 22
> to 100.2.3.1 via ge-1/3/5.0
100.2.5.0/24 *[IS-IS/18] 06:38:55, metric 20
> to 100.2.3.1 via ge-1/3/5.0
100.2.6.0/24 *[IS-IS/18] 06:38:55, metric 22
> to 100.2.3.1 via ge-1/3/5.0
100.2.7.0/24 *[IS-IS/18] 06:38:55, metric 23
> to 100.2.3.1 via ge-1/3/5.0
100.3.4.0/24 *[Direct/0] 1w0d 04:13:10
> via ge-0/3/1.0
100.3.4.1/32 *[Local/0] 1w0d 04:13:10
Local via ge-0/3/1.0
100.3.5.0/24 *[Direct/0] 1w0d 04:13:10
> via ge-0/3/6.0
100.3.5.1/32 *[Local/0] 1w0d 04:13:10
Local via ge-0/3/6.0
100.3.6.0/24 *[Direct/0] 1w0d 04:13:10
> via ge-2/0/4.0
100.3.6.1/32 *[Local/0] 1w0d 04:13:10
Local via ge-2/0/4.0
100.3.7.0/24 *[Direct/0] 1w0d 04:13:10
> via ge-1/1/0.0
100.3.7.1/32 *[Local/0] 1w0d 04:13:10
Local via ge-1/1/0.0
100.4.5.0/24 *[IS-IS/18] 1w0d 04:11:57, metric 23
> to 100.3.5.2 via ge-0/3/6.0
100.6.7.0/24 *[IS-IS/18] 1w0d 04:12:02, metric 25
> to 100.3.6.2 via ge-2/0/4.0
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
49.0001.0010.0100.1004/72
*[Direct/0] 1w0d 04:14:44
> via lo0.0
mpls.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0 *[MPLS/0] 1w0d 04:14:47, metric 1
Receive
1 *[MPLS/0] 1w0d 04:14:47, metric 1
Receive
2 *[MPLS/0] 1w0d 04:14:47, metric 1
Receive
13 *[MPLS/0] 1w0d 04:14:47, metric 1
Receive
inet6.0: 39 destinations, 43 routes (39 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2001:100:0:1::/64 *[IS-IS/18] 1w0d 04:11:57, metric 30
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
2001:100:0:4::/64 *[IS-IS/18] 1w0d 04:12:03, metric 39
> to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
2001:100:0:5::/64 *[IS-IS/18] 1w0d 04:11:57, metric 64
> to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:0:6::/64 *[IS-IS/18] 1w0d 04:12:02, metric 67
> to fe80::2a0:a514:0:3f49 via ge-2/0/4.0
2001:100:0:7::/64 *[IS-IS/18] 1w0d 04:12:51, metric 45
> to fe80::2a0:a514:0:4949 via ge-1/1/0.0
2001:100:1:2::/64 *[IS-IS/18] 1w0d 04:11:57, metric 20
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:1:4::/64 *[IS-IS/18] 1w0d 04:11:57, metric 30
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
2001:100:1:7::/64 *[IS-IS/18] 1w0d 04:11:57, metric 30
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
2001:100:2:3::/64 *[Direct/0] 1w0d 04:13:00
> via ge-1/3/5.0
2001:100:2:3::2/128*[Local/0] 1w0d 04:13:11
Local via ge-1/3/5.0
2001:100:2:4::/64 *[IS-IS/18] 1w0d 04:11:57, metric 22
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:2:5::/64 *[IS-IS/18] 1w0d 04:11:57, metric 20
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:2:6::/64 *[IS-IS/18] 1w0d 04:11:57, metric 22
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:2:7::/64 *[IS-IS/18] 1w0d 04:11:57, metric 23
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:3:4::/64 *[Direct/0] 1w0d 04:12:59
> via ge-0/3/1.0
2001:100:3:4::1/128*[Local/0] 1w0d 04:13:10
Local via ge-0/3/1.0
2001:100:3:5::/64 *[Direct/0] 1w0d 04:12:59
> via ge-0/3/6.0
2001:100:3:5::1/128*[Local/0] 1w0d 04:13:10
Local via ge-0/3/6.0
2001:100:3:6::/64 *[Direct/0] 1w0d 04:12:59
> via ge-2/0/4.0
2001:100:3:6::1/128*[Local/0] 1w0d 04:13:10
Local via ge-2/0/4.0
2001:100:3:7::/64 *[Direct/0] 1w0d 04:12:59
> via ge-1/1/0.0
2001:100:3:7::1/128*[Local/0] 1w0d 04:13:10
Local via ge-1/1/0.0
2001:100:4:5::/64 *[IS-IS/18] 1w0d 04:11:57, metric 23
> to fe80::2a0:a514:0:3549 via ge-0/3/6.0
2001:100:6:7::/64 *[IS-IS/18] 1w0d 04:12:02, metric 25
> to fe80::2a0:a514:0:3f49 via ge-2/0/4.0
abcd::10:255:102:128/128
*[Direct/0] 1w0d 04:14:43
> via lo0.0
abcd::10:255:102:146/128
*[IS-IS/18] 1w0d 04:11:57, metric 40
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
abcd::10:255:102:154/128
*[IS-IS/18] 1w0d 04:12:02, metric 25
> to fe80::2a0:a514:0:3f49 via ge-2/0/4.0
abcd::10:255:102:156/128
*[IS-IS/18] 1w0d 04:11:57, metric 30
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
abcd::10:255:102:166/128
*[IS-IS/18] 1w0d 04:11:57, metric 23
> to fe80::2a0:a514:0:3549 via ge-0/3/6.0
abcd::10:255:102:172/128
*[IS-IS/18] 1w0d 04:12:03, metric 31
> to fe80::2a0:a514:0:2b49 via ge-0/3/1.0
abcd::10:255:102:178/128
*[IS-IS/18] 1w0d 04:11:57, metric 20
> to fe80::2a0:a514:0:1749 via ge-1/3/5.0
to fe80::2a0:a514:0:3549 via ge-0/3/6.0
abcd::10:255:102:180/128
*[IS-IS/18] 1w0d 04:12:51, metric 32
> to fe80::2a0:a514:0:4949 via ge-1/1/0.0
fe80::/64 *[Direct/0] 1w0d 04:13:00
> via ge-1/3/5.0
[Direct/0] 1w0d 04:12:59
> via ge-0/3/1.0
[Direct/0] 1w0d 04:12:59
> via ge-0/3/6.0
[Direct/0] 1w0d 04:12:59
> via ge-2/0/4.0
[Direct/0] 1w0d 04:12:59
> via ge-1/1/0.0
fe80::2a0:a50f:fc64:7649/128
*[Direct/0] 1w0d 04:14:43
> via lo0.0
fe80::2a0:a514:0:2049/128
*[Local/0] 1w0d 04:13:11
Local via ge-1/3/5.0
fe80::2a0:a514:0:2249/128
*[Local/0] 1w0d 04:13:10
Local via ge-0/3/1.0
fe80::2a0:a514:0:2349/128
*[Local/0] 1w0d 04:13:10
Local via ge-0/3/6.0
fe80::2a0:a514:0:2449/128
*[Local/0] 1w0d 04:13:10
Local via ge-2/0/4.0
fe80::2a0:a514:0:2549/128
*[Local/0] 1w0d 04:13:10
Local via ge-1/1/0.0 Meaning
The output shows all Device R3 routes.
Verifying the IS-IS Route
Purpose
Verify the routing table of IS-IS.
Action
From operational mode, run the show isis route command for Device R3.
user@R3> show isis route
IS-IS routing table Current version: L1: 0 L2: 5023
IPv4/IPv6 Routes
----------------
Prefix L Version Metric Type Interface NH Via Backup Score
10.255.102.146/32 2 5023 40 int ge-1/3/5.0 IPV4 R2
ge-0/3/1.0 IPV4 R4 0000000000200000
10.255.102.154/32 2 5023 25 int ge-2/0/4.0 IPV4 R6
10.255.102.156/32 2 5023 30 int ge-1/3/5.0 IPV4 R2
ge-2/0/4.0 IPV4 R6 0000000000000000
10.255.102.166/32 2 5023 23 int ge-0/3/6.0 IPV4 R5
10.255.102.172/32 2 5023 31 int ge-0/3/1.0 IPV4 R4
10.255.102.178/32 2 5023 20 int ge-1/3/5.0 IPV4 R2
10.255.102.180/32 2 5023 32 int ge-1/1/0.0 IPV4 R7
100.0.1.0/24 2 5023 30 int ge-1/3/5.0 IPV4 R2
ge-0/3/1.0 IPV4 R4 0000000002003100
100.0.4.0/24 2 5023 39 int ge-0/3/1.0 IPV4 R4
100.0.5.0/24 2 5023 64 int ge-0/3/6.0 IPV4 R5
100.0.6.0/24 2 5023 67 int ge-2/0/4.0 IPV4 R6
100.0.7.0/24 2 5023 45 int ge-1/1/0.0 IPV4 R7
100.1.2.0/24 2 5023 20 int ge-1/3/5.0 IPV4 R2
100.1.4.0/24 2 5023 30 int ge-1/3/5.0 IPV4 R2
ge-2/0/4.0 IPV4 R6 0000000000000000
100.1.7.0/24 2 5023 30 int ge-1/3/5.0 IPV4 R2
ge-2/0/4.0 IPV4 R6 0000000000000000
100.2.4.0/24 2 5023 22 int ge-1/3/5.0 IPV4 R2
100.2.5.0/24 2 5023 20 int ge-1/3/5.0 IPV4 R2
100.2.6.0/24 2 5023 22 int ge-1/3/5.0 IPV4 R2
100.2.7.0/24 2 5023 23 int ge-1/3/5.0 IPV4 R2
100.4.5.0/24 2 5023 23 int ge-0/3/6.0 IPV4 R5
100.6.7.0/24 2 5023 25 int ge-2/0/4.0 IPV4 R6
2001:100:0:1::/64 2 5023 30 int ge-1/3/5.0 IPV6 R2
ge-0/3/1.0 IPV6 R4
2001:100:0:4::/64 2 5023 39 int ge-0/3/1.0 IPV6 R4
2001:100:0:5::/64 2 5023 64 int ge-0/3/6.0 IPV6 R5
2001:100:0:6::/64 2 5023 67 int ge-2/0/4.0 IPV6 R6
2001:100:0:7::/64 2 5023 45 int ge-1/1/0.0 IPV6 R7
2001:100:1:2::/64 2 5023 20 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
2001:100:1:4::/64 2 5023 30 int ge-1/3/5.0 IPV6 R2
ge-0/3/1.0 IPV6 R4
2001:100:1:7::/64 2 5023 30 int ge-1/3/5.0 IPV6 R2
ge-0/3/1.0 IPV6 R4
2001:100:2:4::/64 2 5023 22 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
2001:100:2:5::/64 2 5023 20 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
2001:100:2:6::/64 2 5023 22 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
2001:100:2:7::/64 2 5023 23 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
2001:100:4:5::/64 2 5023 23 int ge-0/3/6.0 IPV6 R5
2001:100:6:7::/64 2 5023 25 int ge-2/0/4.0 IPV6 R6
abcd::10:255:102:146/128 2 5023 40 int ge-1/3/5.0 IPV6 R2
ge-0/3/1.0 IPV6 R4
abcd::10:255:102:154/128 2 5023 25 int ge-2/0/4.0 IPV6 R6
abcd::10:255:102:156/128 2 5023 30 int ge-1/3/5.0 IPV6 R2
ge-0/3/1.0 IPV6 R4
abcd::10:255:102:166/128 2 5023 23 int ge-0/3/6.0 IPV6 R5
abcd::10:255:102:172/128 2 5023 31 int ge-0/3/1.0 IPV6 R4
abcd::10:255:102:178/128 2 5023 20 int ge-1/3/5.0 IPV6 R2
ge-0/3/6.0 IPV6 R5
abcd::10:255:102:180/128 2 5023 32 int ge-1/1/0.0 IPV6 R7 Meaning
The output displays the routing table of IS-IS routers.
Verifying the Backup SPF Roots for Device R3.
Purpose
Verify the potential IS-IS backup SPF roots for Device R3.
Action
From operational mode, run the show isis backup
spf results command for Device R3.
user@R3> show isis backup spf results
IS-IS level 1 SPF results:
0 nodes
IS-IS level 2 SPF results:
R0.00
Primary next-hop: ge-1/3/5, IPV4, R2, SNPA: b0:c6:9a:2a:f4:bc
Primary next-hop: ge-1/3/5, IPV6, R2, SNPA: b0:c6:9a:2a:f4:bc
Root: R4, Root Metric: 21, Metric: 18, Root Preference: 0x0
track-item: R4.04-00, track-item-isnbr: R4.00
track-item: R0.00-00, track-item-isnbr: R6.03
Eligible, Backup next-hop: ge-0/3/1, IPV4, R4, SNPA: b0:c6:9a:2a:f4:bd
Eligible, Backup next-hop: ge-0/3/1, IPV6, R4, SNPA: b0:c6:9a:2a:f4:bd
Root: R2, Root Metric: 10, Metric: 20, Root Preference: 0x0
track-item: R2.02-00, track-item-isnbr: R2.00
track-item: R1.02-00
track-item: R1.00-00, track-item-isnbr: R2.02
track-item: R0.00-00, track-item-isnbr: R1.02
Not eligible, IPV4, Reason: Primary next-hop link fate sharing
Not eligible, IPV6, Reason: Primary next-hop link fate sharing
Root: R7, Root Metric: 22, Metric: 20, Root Preference: 0x0
track-item: R7.05-00, track-item-isnbr: R7.00
track-item: R1.02-00
track-item: R1.00-00
track-item: R0.00-00, track-item-isnbr: R1.02
Eligible, Backup next-hop: ge-1/1/0, IPV4, R7, SNPA: b0:c6:9a:2a:f4:bd
Eligible, Backup next-hop: ge-1/1/0, IPV6, R7, SNPA: b0:c6:9a:2a:f4:bd
Root: R5, Root Metric: 13, Metric: 28, Root Preference: 0x0
track-item: R5.03-00, track-item-isnbr: R5.00
track-item: R4.04-00, track-item-isnbr: R4.00
track-item: R4.00-00
track-item: R0.00-00, track-item-isnbr: R6.03
Eligible, Backup next-hop: ge-0/3/6, IPV4, R5, SNPA: b0:c6:9a:2a:f4:bd
Eligible, Backup next-hop: ge-0/3/6, IPV6, R5, SNPA: b0:c6:9a:2a:f4:bd
Root: R6, Root Metric: 15, Metric: 30, Root Preference: 0x0
track-item: R7.05-00, track-item-isnbr: R7.00
track-item: R7.04-00, track-item-isnbr: R6.00
track-item: R7.00-00
track-item: R1.02-00
track-item: R1.00-00
track-item: R0.00-00, track-item-isnbr: R1.02
Eligible, Backup next-hop: ge-2/0/4, IPV4, R6, SNPA: b0:c6:9a:2a:f4:bd
Eligible, Backup next-hop: ge-2/0/4, IPV6, R6, SNPA: b0:c6:9a:2a:f4:bd
R7.00
Primary next-hop: ge-1/1/0, IPV4, R7, SNPA: b0:c6:9a:2a:f4:bd
Primary next-hop: ge-1/1/0, IPV6, R7, SNPA: b0:c6:9a:2a:f4:bd
Root: R7, Root Metric: 22, Metric: 0, Root Preference: 0x0
Not eligible, IPV4, Reason: Interface protection not configured
Not eligible, IPV6, Reason: Interface protection not configured
Root: R6, Root Metric: 15, Metric: 10, Root Preference: 0x0
track-item: R7.04-00, track-item-isnbr: R6.00
track-item: R7.00-00
. . .
Meaning
The output displays the root calculations through each directly connected router.
Verifying the Backup Selection Policy for Device R3
Purpose
Action
From operational mode, run the show backup-selection command for Device R3.
user@R3> show backup-selection
Prefix: 0.0.0.0/0
Interface: all
Admin-group include-all: c1
Admin-group include-any: c2
Admin-group preference: c3
Neighbor preference: 10.255.102.178
Neighbor-tag preference: 1004
Protection Type: Link, Downstream Paths Only: Enabled, SRLG: Loose, B/w >= Primary: Enabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Dest-metric, Root-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth
Prefix: 100.0.1.0/24
Interface: all
Protection Type: Link, Downstream Paths Only: Disabled, SRLG: Strict, B/w >= Primary: Enabled, Root-metric: lowest, Dest-metric: lowest
Metric Evaluation Order: Dest-metric, Root-metric
Policy Evaluation Order: Admin-group, SRLG, Bandwidth, Protection, Neighbor, Metric, Neighbor-Tag
Prefix: 100.0.7.0/24
Interface: all
Protection Type: Link, Downstream Paths Only: Disabled, SRLG: Strict, 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, Neighbor, Metric, Neighbor-TagMeaning
The output displays the configured policies per prefix per primary next-hop interface.