- play_arrow Understanding and Configuring Junos Routing Policies
- play_arrow Overview
- Policy Framework Overview
- Comparison of Routing Policies and Firewall Filters
- Prefix Prioritization Overview
- FIB Prefix Prioritization
- Accounting of the Policer Overhead Attribute at the Interface Level
- Configuring the Accounting of Policer Overhead in Interface Statistics
- Understanding Routing Policies
- Protocol Support for Import and Export Policies
- Example: Applying Routing Policies at Different Levels of the BGP Hierarchy
- Default Routing Policies
- Example: Configuring a Conditional Default Route Policy
- play_arrow Evaluating Routing Policies Using Match Conditions, Actions, Terms, and Expressions
- How a Routing Policy Is Evaluated
- Categories of Routing Policy Match Conditions
- Routing Policy Match Conditions
- Route Filter Match Conditions
- Actions in Routing Policy Terms
- Summary of Routing Policy Actions
- Example: Configuring a Routing Policy to Advertise the Best External Route to Internal Peers
- Example: Configuring BGP to Advertise Inactive Routes
- Example: Using Routing Policy to Set a Preference Value for BGP Routes
- Example: Enabling BGP Route Advertisements
- Example: Rejecting Known Invalid Routes
- Example: Using Routing Policy in an ISP Network
- Understanding Policy Expressions
- Understanding Backup Selection Policy for OSPF Protocol
- Configuring Backup Selection Policy for the OSPF Protocol
- Configuring Backup Selection Policy for IS-IS Protocol
- Example: Configuring Backup Selection Policy for the OSPF or OSPF3 Protocol
- play_arrow Evaluating Complex Cases Using Policy Chains and Subroutines
- play_arrow Configuring Route Filters and Prefix Lists as Match Conditions
- Understanding Route Filters for Use in Routing Policy Match Conditions
- Understanding Route Filter and Source Address Filter Lists for Use in Routing Policy Match Conditions
- Understanding Load Balancing Using Source or Destination IP Only
- Configuring Load Balancing Using Source or Destination IP Only
- Walkup for Route Filters Overview
- Configuring Walkup for Route Filters to Improve Operational Efficiency
- Example: Configuring Route Filter Lists
- Example: Configuring Walkup for Route Filters Globally to Improve Operational Efficiency
- Example: Configuring Walkup for Route Filters Locally to Improve Operational Efficiency
- Example: Configuring a Route Filter Policy to Specify Priority for Prefixes Learned Through OSPF
- Example: Configuring the MED Using Route Filters
- Example: Configuring Layer 3 VPN Protocol Family Qualifiers for Route Filters
- Understanding Prefix Lists for Use in Routing Policy Match Conditions
- Example: Configuring Routing Policy Prefix Lists
- Example: Configuring the Priority for Route Prefixes in the RPD Infrastructure
- Configuring Priority for Route Prefixes in RPD Infrastructure
- play_arrow Configuring AS Paths as Match Conditions
- Understanding AS Path Regular Expressions for Use as Routing Policy Match Conditions
- Example: Using AS Path Regular Expressions
- Understanding Prepending AS Numbers to BGP AS Paths
- Example: Configuring a Routing Policy for AS Path Prepending
- Understanding Adding AS Numbers to BGP AS Paths
- Example: Advertising Multiple Paths in BGP
- Improve the Performance of AS Path Lookup in BGP Policy
- play_arrow Configuring Communities as Match Conditions
- Understanding BGP Communities, Extended Communities, and Large Communities as Routing Policy Match Conditions
- Understanding How to Define BGP Communities and Extended Communities
- How BGP Communities and Extended Communities Are Evaluated in Routing Policy Match Conditions
- Example: Configuring Communities in a Routing Policy
- Example: Configuring Extended Communities in a Routing Policy
- Example: Configuring BGP Large Communities
- Example: Configuring a Routing Policy Based on the Number of BGP Communities
- Example: Configuring a Routing Policy That Removes BGP Communities
- play_arrow Increasing Network Stability with BGP Route Flapping Actions
- play_arrow Tracking Traffic Usage with Source Class Usage and Destination Class Usage Actions
- Understanding Source Class Usage and Destination Class Usage Options
- Source Class Usage Overview
- Guidelines for Configuring SCU
- System Requirements for SCU
- Terms and Acronyms for SCU
- Roadmap for Configuring SCU
- Roadmap for Configuring SCU with Layer 3 VPNs
- Configuring Route Filters and Source Classes in a Routing Policy
- Applying the Policy to the Forwarding Table
- Enabling Accounting on Inbound and Outbound Interfaces
- Configuring Input SCU on the vt Interface of the Egress PE Router
- Mapping the SCU-Enabled vt Interface to the VRF Instance
- Configuring SCU on the Output Interface
- Associating an Accounting Profile with SCU Classes
- Verifying Your SCU Accounting Profile
- SCU Configuration
- SCU with Layer 3 VPNs Configuration
- Example: Grouping Source and Destination Prefixes into a Forwarding Class
- play_arrow Avoiding Traffic Routing Threats with Conditional Routing Policies
- Conditional Advertisement and Import Policy (Routing Table) with certain match conditions
- Conditional Advertisement Enabling Conditional Installation of Prefixes Use Cases
- Example: Configuring a Routing Policy for Conditional Advertisement Enabling Conditional Installation of Prefixes in a Routing Table
- play_arrow Protecting Against DoS Attacks by Forwarding Traffic to the Discard Interface
- play_arrow Improving Commit Times with Dynamic Routing Policies
- play_arrow Testing Before Applying Routing Policies
-
- play_arrow Configuring Firewall Filters
- play_arrow Understanding How Firewall Filters Protect Your Network
- Firewall Filters Overview
- Router Data Flow Overview
- Stateless Firewall Filter Overview
- Understanding How to Use Standard Firewall Filters
- Understanding How Firewall Filters Control Packet Flows
- Stateless Firewall Filter Components
- Stateless Firewall Filter Application Points
- How Standard Firewall Filters Evaluate Packets
- Understanding Firewall Filter Fast Lookup Filter
- Understanding Egress Firewall Filters with PVLANs
- Selective Class-based Filtering on PTX Routers
- Guidelines for Configuring Firewall Filters
- Guidelines for Applying Standard Firewall Filters
- Supported Standards for Filtering
- Monitoring Firewall Filter Traffic
- Troubleshooting Firewall Filters
- play_arrow Firewall Filter Match Conditions and Actions
- Overview of Firewall Filters (OCX Series)
- Overview of Firewall Filter Profiles on ACX Series Routers (Junos OS Evolved)
- Understanding Firewall Filter Match Conditions
- Understanding Firewall Filter Planning
- Understanding How Firewall Filters Are Evaluated
- Understanding Firewall Filter Match Conditions
- Firewall Filter Flexible Match Conditions
- Firewall Filter Nonterminating Actions
- Firewall Filter Terminating Actions
- Firewall Filter Match Conditions and Actions (ACX Series Routers)
- Firewall Filter Match Conditions and Actions in ACX Series Routers (Junos OS Evolved)
- Firewall Filter Match Conditions for Protocol-Independent Traffic
- Firewall Filter Match Conditions for IPv4 Traffic
- Firewall Filter Match Conditions for IPv6 Traffic
- Firewall Filter Match Conditions Based on Numbers or Text Aliases
- Firewall Filter Match Conditions Based on Bit-Field Values
- Firewall Filter Match Conditions Based on Address Fields
- Firewall Filter Match Conditions Based on Address Classes
- Understanding IP-Based Filtering and Selective Port Mirroring of MPLS Traffic
- Firewall Filter Match Conditions for MPLS Traffic
- Firewall Filter Match Conditions for MPLS-Tagged IPv4 or IPv6 Traffic
- Firewall Filter Match Conditions for VPLS Traffic
- Firewall Filter Match Conditions for Layer 2 CCC Traffic
- Firewall Filter Match Conditions for Layer 2 Bridging Traffic
- Firewall Filter Support on Loopback Interface
- play_arrow Applying Firewall Filters to Routing Engine Traffic
- Configuring Logical Units on the Loopback Interface for Routing Instances in Layer 3 VPNs
- Example: Configuring a Filter to Limit TCP Access to a Port Based On a Prefix List
- Example: Configuring a Stateless Firewall Filter to Accept Traffic from Trusted Sources
- Example: Configure a Filter to Block Telnet and SSH Access
- Example: Configuring a Filter to Block TFTP Access
- Example: Configuring a Filter to Accept Packets Based on IPv6 TCP Flags
- Example: Configuring a Filter to Block TCP Access to a Port Except from Specified BGP Peers
- Example: Configuring a Stateless Firewall Filter to Protect Against TCP and ICMP Floods
- Example: Protecting the Routing Engine with a Packets-Per-Second Rate Limiting Filter
- Example: Configuring a Filter to Exclude DHCPv6 and ICMPv6 Control Traffic for LAC Subscriber
- Port Number Requirements for DHCP Firewall Filters
- Example: Configuring a DHCP Firewall Filter to Protect the Routing Engine
- play_arrow Applying Firewall Filters to Transit Traffic
- Example: Configuring a Filter for Use as an Ingress Queuing Filter
- Example: Configuring a Filter to Match on IPv6 Flags
- Example: Configuring a Filter to Match on Port and Protocol Fields
- Example: Configuring a Filter to Count Accepted and Rejected Packets
- Example: Configuring a Filter to Count and Discard IP Options Packets
- Example: Configuring a Filter to Count IP Options Packets
- Example: Configuring a Filter to Count and Sample Accepted Packets
- Example: Configuring a Filter to Set the DSCP Bit to Zero
- Example: Configuring a Filter to Set the DSCP Bit to Zero
- Example: Configuring a Filter to Match on Two Unrelated Criteria
- Example: Configuring a Filter to Accept DHCP Packets Based on Address
- Example: Configuring a Filter to Accept OSPF Packets from a Prefix
- Example: Configuring a Stateless Firewall Filter to Handle Fragments
- Configuring a Firewall Filter to Prevent or Allow IPv4 Packet Fragmentation
- Configuring a Firewall Filter to Discard Ingress IPv6 Packets with a Mobility Extension Header
- Example: Configuring an Egress Filter Based on IPv6 Source or Destination IP Addresses
- Example: Configuring a Rate-Limiting Filter Based on Destination Class
- play_arrow Configuring Firewall Filters in Logical Systems
- Firewall Filters in Logical Systems Overview
- Guidelines for Configuring and Applying Firewall Filters in Logical Systems
- References from a Firewall Filter in a Logical System to Subordinate Objects
- References from a Firewall Filter in a Logical System to Nonfirewall Objects
- References from a Nonfirewall Object in a Logical System to a Firewall Filter
- Example: Configuring Filter-Based Forwarding
- Example: Configuring Filter-Based Forwarding on Logical Systems
- Example: Configuring a Stateless Firewall Filter to Protect a Logical System Against ICMP Floods
- Example: Configuring a Stateless Firewall Filter to Protect a Logical System Against ICMP Floods
- Unsupported Firewall Filter Statements for Logical Systems
- Unsupported Actions for Firewall Filters in Logical Systems
- Filter-Based Forwarding for Routing Instances
- Forwarding Table Filters for Routing Instances on ACX Series Routers
- Configuring Forwarding Table Filters
- play_arrow Configuring Firewall Filter Accounting and Logging
- play_arrow Attaching Multiple Firewall Filters to a Single Interface
- Applying Firewall Filters to Interfaces
- Configuring Firewall Filters
- Multifield Classifier Example: Configuring Multifield Classification
- Multifield Classifier for Ingress Queuing on MX Series Routers with MPC
- Assigning Multifield Classifiers in Firewall Filters to Specify Packet-Forwarding Behavior (CLI Procedure)
- Understanding Multiple Firewall Filters in a Nested Configuration
- Guidelines for Nesting References to Multiple Firewall Filters
- Understanding Multiple Firewall Filters Applied as a List
- Guidelines for Applying Multiple Firewall Filters as a List
- Example: Applying Lists of Multiple Firewall Filters
- Example: Nesting References to Multiple Firewall Filters
- Example: Filtering Packets Received on an Interface Set
- play_arrow Attaching a Single Firewall Filter to Multiple Interfaces
- Interface-Specific Firewall Filter Instances Overview
- Interface-Specific Firewall Filter Instances Overview
- Filtering Packets Received on a Set of Interface Groups Overview
- Filtering Packets Received on an Interface Set Overview
- Example: Configuring Interface-Specific Firewall Filter Counters
- Example: Configuring a Stateless Firewall Filter on an Interface Group
- play_arrow Configuring Filter-Based Tunneling Across IP Networks
- Understanding Filter-Based Tunneling Across IPv4 Networks
- Firewall Filter-Based L2TP Tunneling in IPv4 Networks Overview
- Interfaces That Support Filter-Based Tunneling Across IPv4 Networks
- Components of Filter-Based Tunneling Across IPv4 Networks
- Example: Transporting IPv6 Traffic Across IPv4 Using Filter-Based Tunneling
- play_arrow Configuring Service Filters
- Service Filter Overview
- How Service Filters Evaluate Packets
- Guidelines for Configuring Service Filters
- Guidelines for Applying Service Filters
- Example: Configuring and Applying Service Filters
- Service Filter Match Conditions for IPv4 or IPv6 Traffic
- Service Filter Nonterminating Actions
- Service Filter Terminating Actions
- play_arrow Configuring Simple Filters
- play_arrow Configuring Layer 2 Firewall Filters
- Understanding Firewall Filters Used to Control Traffic Within Bridge Domains and VPLS Instances
- Example: Configuring Filtering of Frames by MAC Address
- Example: Configuring Filtering of Frames by IEEE 802.1p Bits
- Example: Configuring Filtering of Frames by Packet Loss Priority
- Example: Configuring Policing and Marking of Traffic Entering a VPLS Core
- Understanding Firewall Filters on OVSDB-Managed Interfaces
- Example: Applying a Firewall Filter to OVSDB-Managed Interfaces
- play_arrow Configuring Firewall Filters for Forwarding, Fragments, and Policing
- Filter-Based Forwarding Overview
- Firewall Filters That Handle Fragmented Packets Overview
- Stateless Firewall Filters That Reference Policers Overview
- Example: Configuring Filter-Based Forwarding on the Source Address
- Example: Configuring Filter-Based Forwarding to a Specific Outgoing Interface or Destination IP Address
- play_arrow Configuring Firewall Filters (EX Series Switches)
- Firewall Filters for EX Series Switches Overview
- Understanding Planning of Firewall Filters
- Understanding Firewall Filter Match Conditions
- Understanding How Firewall Filters Control Packet Flows
- Understanding How Firewall Filters Are Evaluated
- Understanding Firewall Filter Processing Points for Bridged and Routed Packets on EX Series Switches
- Firewall Filter Match Conditions, Actions, and Action Modifiers for EX Series Switches
- Platform Support for Firewall Filter Match Conditions, Actions, and Action Modifiers on EX Series Switches
- Support for Match Conditions and Actions for Loopback Firewall Filters on Switches
- Configuring Firewall Filters (CLI Procedure)
- Understanding How Firewall Filters Test a Packet's Protocol
- Understanding Filter-Based Forwarding for EX Series Switches
- Example: Configuring Firewall Filters for Port, VLAN, and Router Traffic on EX Series Switches
- Example: Configuring a Firewall Filter on a Management Interface on an EX Series Switch
- Example: Using Filter-Based Forwarding to Route Application Traffic to a Security Device
- Example: Applying Firewall Filters to Multiple Supplicants on Interfaces Enabled for 802.1X or MAC RADIUS Authentication
- Verifying That Policers Are Operational
- Troubleshooting Firewall Filters
- play_arrow Configuring Firewall Filters (QFX Series Switches, EX4600 Switches, PTX Series Routers)
- Overview of Firewall Filters (QFX Series)
- Understanding Firewall Filter Planning
- Planning the Number of Firewall Filters to Create
- Firewall Filter Match Conditions and Actions (QFX and EX Series Switches)
- Firewall Filter Match Conditions and Actions (QFX10000 Switches)
- Firewall Filter Match Conditions and Actions (PTX Series Routers)
- Firewall and Policing Differences Between PTX Series Packet Transport Routers and T Series Matrix Routers
- Configuring Firewall Filters
- Applying Firewall Filters to Interfaces
- Overview of MPLS Firewall Filters on Loopback Interface
- Configuring MPLS Firewall Filters and Policers on Switches
- Configuring MPLS Firewall Filters and Policers on Routers
- Configuring MPLS Firewall Filters and Policers
- Understanding How a Firewall Filter Tests a Protocol
- Understanding Firewall Filter Processing Points for Bridged and Routed Packets
- Understanding Filter-Based Forwarding
- Example: Using Filter-Based Forwarding to Route Application Traffic to a Security Device
- Configuring a Firewall Filter to De-Encapsulate GRE or IPIP Traffic
- Verifying That Firewall Filters Are Operational
- Monitoring Firewall Filter Traffic
- Troubleshooting Firewall Filter Configuration
- play_arrow Configuring Firewall Filter Accounting and Logging (EX9200 Switches)
-
- play_arrow Configuration Statements and Operational Commands
- play_arrow Troubleshooting
- play_arrow Knowledge Base
-
ON THIS PAGE
Example: Configuring a Physical Interface Policer for Aggregate Traffic at a Physical Interface
This example shows how to configure a single-rate two-color policer as a physical interface policer.
Requirements
No special configuration beyond device initialization is required before configuring this example.
Overview
A physical interface policer specifies rate-limiting for aggregate traffic, which encompasses all protocol families and logical interfaces configured on a physical interface, even if the interfaces belong to different routing instances.
You can apply a physical interface policer to Layer 3 input or output traffic only by
referencing the policer from a stateless firewall filter that is configured for
specific a specific protocol family (not for family any) and
configured as a physical interface filter. You configure the filter terms with match
conditions that select the types of packets you want to rate-limit, and you specify
the physical interface policer as the action to apply to matched packets.
Physical interface policers/filters are not supported for list filters.
Topology
The physical interface policer in this example,
shared-policer-A, rate-limits to 10,000,000 bps and permits a
maximum burst of traffic of 500,000 bytes. You configure the policer to discard
packets in nonconforming flows, but you could instead configure the policer to
re-mark nonconforming traffic with a forwarding class, a packet loss priority
(PLP) level, or both.
To be able to use the policer to rate-limit IPv4 traffic, you reference the policer from an IPv4 physical interface filter. For this example, you configure the filter to pass the policer IPv4 packets that meet either of the following match terms:
Packets received through TCP and with the IP precedence fields
critical-ecp(0xa0),immediate(0x40), orpriority(0x20)Packets received through TCP and with the IP precedence fields
internet-control(0xc0) orroutine(0x00)
You could also reference the policer from physical interface filters for other protocol families.
Configuration
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Use the CLI Editor in Configuration Mode.
To configure this example, perform the following tasks:
- CLI Quick Configuration
- Configuring the Logical Interfaces on the Physical Interface
- Configuring a Physical Interface Policer
- Configuring an IPv4 Physical Interface Filter
- Applying the IPv4 Physical interface Filter to Reference the Physical Interface Policers
CLI Quick Configuration
To quickly configure this example, copy the following configuration commands
into a text file, remove any line breaks, and then paste the commands into the CLI at the [edit] hierarchy level.
set interfaces so-1/0/0 unit 0 family inet address 192.168.1.1/24 set interfaces so-1/0/0 unit 0 family vpls set interfaces so-1/0/0 unit 1 family mpls set firewall policer shared-policer-A physical-interface-policer set firewall policer shared-policer-A if-exceeding bandwidth-limit 100m burst-size-limit 500k set firewall policer shared-policer-A then discard set firewall family inet filter ipv4-filter physical-interface-filter set firewall family inet filter ipv4-filter term tcp-police-1 from precedence [ critical-ecp immediate priority ] set firewall family inet filter ipv4-filter term tcp-police-1 from protocol tcp set firewall family inet filter ipv4-filter term tcp-police-1 then policer shared-policer-A set firewall family inet filter ipv4-filter term tcp-police-2 from precedence [ internet-control routine ] set firewall family inet filter ipv4-filter term tcp-police-2 from protocol tcp set firewall family inet filter ipv4-filter term tcp-police-2 then policer shared-policer-A set interfaces so-1/0/0 unit 0 family inet filter input ipv4-filter
Configuring the Logical Interfaces on the Physical Interface
Step-by-Step Procedure
To configure the logical interfaces on the physical interface:
Enable configuration of logical interfaces.
content_copy zoom_out_map[edit] user@host# edit interfaces so-1/0/0
Configure protocol families on logical unit 0.
content_copy zoom_out_map[edit interfaces so-1/0/0] user@host# set unit 0 family inet address 192.168.1.1/24 user@host# set unit 0 family vpls
Configure protocol families on logical unit 1.
content_copy zoom_out_map[edit interfaces so-1/0/0] user@host# set unit 1 family mpls
Results
Confirm the configuration of the firewall filter by entering the show interfaces configuration mode command. If the command output does not display the intended configuration,
repeat the instructions in this procedure to correct the configuration.
[edit]
user@host# show interfaces
so-1/0/0 {
unit 0 {
family inet {
address 192.168.1.1/24;
}
family vpls;
}
unit 1 {
family mpls;
}
}
Configuring a Physical Interface Policer
Step-by-Step Procedure
To configure a physical interface policer:
Enable configuration of the two-color policer.
content_copy zoom_out_map[edit] user@host# edit firewall policer shared-policer-A
Configure the type of two-color policer.
content_copy zoom_out_map[edit firewall policer shared-policer-A] user@host# set physical-interface-policer
Configure the traffic limits and the action for packets in a nonconforming traffic flow.
content_copy zoom_out_map[edit firewall policer shared-policer-A] user@host# set if-exceeding bandwidth-limit 100m burst-size-limit 500k user@host# set then discard
For a physical interface filter, the actions you can configure for packets in a nonconforming traffic flow are to discard the packets, assign a forwarding class, assign a PLP value, or assign both a forwarding class and a PLP value.
Results
Confirm the configuration of the policer by entering the show firewall configuration mode command. If the command output does not display the intended configuration,
repeat the instructions in this procedure to correct the configuration.
[edit]
user@host# show firewall
policer shared-policer-A {
physical-interface-policer;
if-exceeding {
bandwidth-limit 100m;
burst-size-limit 500k;
}
then discard;
}
Configuring an IPv4 Physical Interface Filter
Step-by-Step Procedure
To configure a physical interface policer as the action for terms in an IPv4 physical interface policer:
Configure a standard stateless firewall filter under a specific protocol family.
content_copy zoom_out_map[edit] user@host# edit firewall family inet filter ipv4-filter
You cannot configure a physical interface firewall filter for
family any.Configure the filter as a physical interface filter so that you can apply the physical interface policer as an action.
content_copy zoom_out_map[edit firewall family inet filter ipv4-filter] user@host# set physical-interface-filter
Configure the first term to match IPv4 packets received through TCP with the IP precedence fields
critical-ecp,immediate, orpriorityand to apply the physical interface policer as a filter action.content_copy zoom_out_map[edit firewall family inet filter ipv4-filter] user@host# set term tcp-police-1 from precedence [ critical-ecp immediate priority ] user@host# set term tcp-police-1 from protocol tcp user@host# set term tcp-police-1 then policer shared-policer-A
Configure the first term to match IPv4 packets received through TCP with the IP precedence fields
internet-controlorroutineand to apply the physical interface policer as a filter action.content_copy zoom_out_map[edit firewall family inet filter ipv4-filter] user@host# set term tcp-police-2 from precedence [ internet-control routine ] user@host# set term tcp-police-2 from protocol tcp user@host# set term tcp-police-2 then policer shared-policer-A
Results
Confirm the configuration of the firewall filter by entering the show firewall configuration mode command. If the command output does not display the intended configuration,
repeat the instructions in this procedure to correct the configuration.
[edit]
user@host# show firewall
family inet {
filter ipv4-filter {
physical-interface-filter;
term tcp-police-1 {
from {
precedence [ critical-ecp immediate priority ];
protocol tcp;
}
then policer shared-policer-A;
}
term tcp-police-2 {
from {
precedence [ internet-control routine ];
protocol tcp;
}
then policer shared-policer-A;
}
}
}
policer shared-policer-A {
physical-interface-policer;
if-exceeding {
bandwidth-limit 100m;
burst-size-limit 500k;
}
then discard;
}
Applying the IPv4 Physical interface Filter to Reference the Physical Interface Policers
Step-by-Step Procedure
To apply the physical interface filter so it references the physical interface policers:
Enable configuration of IPv4 on the logical interface.
content_copy zoom_out_map[edit] user@host# edit interfaces so-1/0/0 unit 0 family inet
Apply the IPv4 physical interface filter in the input direction.
content_copy zoom_out_map[edit interfaces so-1/0/0 unit 0 family inet] user@host# set filter input ipv4-filter
Results
Confirm the configuration of the firewall filter by entering the show interfaces configuration mode command. If the command output does not display the intended configuration,
repeat the instructions in this procedure to correct the configuration.
[edit]
user@host# show interfaces
so-1/0/0 {
unit 0 {
family inet {
filter {
input ipv4-filter;
}
address 192.168.1.1/24;
}
family vpls;
}
unit 1 {
family mpls;
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
- Displaying the Firewall Filters Applied to an Interface
- Displaying the Number of Packets Processed by the Policer at the Logical Interface
Displaying the Firewall Filters Applied to an Interface
Purpose
Verify that the firewall filter ipv4-filter is applied to the IPv4
input traffic at logical interface so-1/0/0.0.
Action
Use the show interfaces statistics operational mode command for logical interface so-1/0/0.0, and include
the detail option. In the Protocol inet section
of the command output, the Input Filters field shows that
the firewall filter ipv4-filter is applied in the input direction.
user@host> show interfaces statistics so-1/0/0 detail
Logical interface so-1/0/0.0 (Index 79) (SNMP ifIndex 510) (Generation 149)
Flags: Hardware-Down Point-To-Point SNMP-Traps 0x4000 Encapsulation: PPP
Protocol inet, MTU: 4470, Generation: 173, Route table: 0
Flags: Sendbcast-pkt-to-re, Protocol-Down
Input Filters: ipv4-filter
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 10.39/16, Local: 10.39.1.1, Broadcast: 10.39.255.255, Generation: 163
Displaying the Number of Packets Processed by the Policer at the Logical Interface
Purpose
Verify the traffic flow through the logical interface and that the policer is evaluated when packets are received on the logical interface.
Action
Use the show firewall operational mode command for the filter you
applied to the logical interface.
user@host> show firewall filter ipv4-filter Filter: ipv4-filter Policers: Name Packets shared-policer-A-tcp-police-1 32863 shared-policer-A-tcp-police-2 3870
The command output displays the name of policer (shared-policer-A), the name
of the filter term (police-1) under which the policer action is specified, and
the number of packets that matched the filter term. This is only the number of out-of-specification
(out-of-spec) packet counts, not all packets policed by the policer.
