BGP Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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Adj-RIB-in post-policy view for L3VPN address families

Updated: February 28, 2026

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Overview

Outlines the Adj-RIB-In post-policy view for L3VPN address families, featuring reference information and step-by-step instructions to enable post-policy monitoring.

The Adj-RIB-In post-policy views for L3VPN traffic is a routing feature that

  • provide processed routing information received from BGP peers after applying inbound policy filters and modifications,

  • enable detailed monitoring and analysis of L3VPN BGP networks by exporting post-policy routing data to a BMP server for route inspection, filtering, and attribute modification, and

  • support multiple address families, including VPNv4, VPNv6, IPv4, and IPv6 unicast routes across default and non-default VRFs.

This feature helps you monitor routes comprehensively, perform routing analytics, and conduct traffic engineering in L3VPN environments. You enable this capability by configuring the route-monitoring inbound post-policy command on the BMP server.

  • The post-policy view reflects routing information after policies have been applied, ensuring you see the effective routes used in the network.

  • Address families supported include Default VRF (VPNv4 Unicast, VPNv6 Unicast) and Non-Default VRF (IPv4 Unicast, IPv6 Unicast).

  • Configuration involves enabling BMP server monitoring with the inbound post-policy option, which you can verify using show commands on the router.

    Table 1. Feature History Table

    Feature Name

    Release

    Description

    Adj-RIB-In Post-Policy View for L3VPN Address Families

    		 Release 25.4.1

    Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*)

    *This feature is now supported on:

    • 8011-32Y8L2H2FH

    • 8011-12G12X4Y-A

    • 8011-12G12X4Y-D

    Adj-RIB-In Post-Policy View for L3VPN Address Families

    Release 25.1.1

    Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*)

    *This feature is supported on Cisco 8011-4G24Y4H-I routers.

    Adj-RIB-In Post-Policy View for L3VPN Address Families

    		 Release 24.4.1

    Introduced in this release on: Fixed Systems (8200 [ASIC: P100], 8700 [ASIC: P100, K100])(select variants only); Modular Systems (8800 [LC ASIC: P100])(select variants only*)

    *This feature is supported on:

    • 8212-48FH-M

    • 8711-32FH-M

    • 8712-MOD-M

    • 88-LC1-36EH

    • 88-LC1-12TH24FH-E

    • 88-LC1-52Y8H-EM

Adj-RIB-In post-policy-reference

The address families supported in the Adj-RIB-In post-policy view are key to monitoring L3VPN BGP networks effectively. This feature allows you to observe processed routing information after inbound policy filters and modifications have been applied, enabling accurate route monitoring and analysis. Supporting multiple address families ensures comprehensive visibility across different network segments and VRFs.

Cisco IOS XR Release 7.5.4 supports the following address families in the Adj-RIB-In post-policy view for L3VPN BGP network monitoring:

  • Default VRF: VPNv4 unicast and VPNv6 unicast

  • Non-default VRF: IPv4 unicast and IPv6 unicast

This support is important because it enables you to monitor and analyze routing information across both default and non-default VRFs, covering a broad range of unicast routes in your L3VPN environment.

Enable the Adj-RIB-in post-policy view

Enable detailed monitoring and analysis of processed routing information for L3VPN address families by activating the Adj-RIB-In post-policy view on the BMP server.

You are configuring the BMP server to monitor processed routing information for L3VPN networks.

Before you begin

  • Ensure you have administrative access to the router to perform configuration changes.

  • Verify that BMP is supported and enabled on your device.

Follow these steps to configure Adj-RIB-in post-policy view for L3VPN address families

Procedure

1.

Use the route-monitoring inbound post-policy to activate the route-monitoring inbound post-policy feature.

Example:

Router# config
Router(config)# bmp server all
Router(config-bgp-bmp)# route-monitoring inbound post-policy

Example:

Note

The route-monitoring policy post inbound command is deprecated and removed starting from Cisco IOS XR release 24.1.1.

You have activated the route-monitoring inbound post-policy feature.
2.

Use the show bgp bmp server <server ID> command to verify whether the Adj-RIB-In post-policy, the inbound post-policy, is configured.

 

Router# show bgp bmp server 1
Tue Nov 29 19:02:27.837 IST
BMP server 1
Host 12.1.2.1 Port 16001
Connected for 05:51:09
Last Disconnect event received : 00:00:00
Precedence:  internet
BGP neighbors: 7
VRF: - (0x60000000)
Update Source: - (-)
Update Source Vrf ID: 0x0
Update Mode                       : In-Post-Policy
  In-Post-Policy
   Advertisement interval         : 15 secs
   Scanner interval               : 60 secs
Flapping Delay                    : 300 secs
Initial Delay                     : 0 secs
Initial Refresh Delay             : 1 secs
Initial Refresh Spread            : 1 secs
Stats Reporting Period            : 0 secs
Queue Route Mon Msg buffer limit  : 133693 KB (Current Server Up Count: 2)
Queue Route Mon Msg buffer usage  : 0 B
Queue write pulse sent            : Nov 29 13:13:15.484, Nov 29 13:11:53.478 (all)
Queue write pulse received        : Nov 29 13:13:15.484
Update Generation in Progress     : No
Reset Walk in Progress            : No
------More----

What to do next

You can then configure the following commands:

  • bmp advertisement-interval to set the minimum interval between the sending of BMP routing updates.

  • bmp scan-time to configure scanning intervals of BMP-speaking networking devices.