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

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Enhanced monitoring of NSR statistics

Updated: February 28, 2026

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Overview

Details enhanced monitoring options for NSR statistics and provides tasks to view and interpret advanced NSR statistical data for improved network reliability and troubleshooting.

The Enhanced monitoring of non-static routing (NSR) statistics is a network monitoring feature that

  • provides detailed packet processing metrics during critical network operations,

  • tracks BGP update processing speed, traffic volume, and packet sequence number integrity, and

  • enables early detection of packet loss or sequencing inconsistencies to maintain routing reliability and network stability.

This feature helps you ensure continuous and reliable BGP routing by synchronizing state information between primary and standby routing engines during software upgrades or failover events. It gives you real-time insights into NSR activities so you can proactively address issues before they impact network performance.

NSR synchronization and monitoring for network stability and failover

  • NSR synchronizes routing and forwarding data between primary and standby routing engines to minimize disruption during failover.

  • Monitoring NSR statistics enables proactive identification and resolution of potential BGP routing issues.

  • The feature supports comprehensive data analysis during pivotal network events, enhancing overall network stability and reliability.

Table 1. Feature History Table

Feature Name

Release Name

Description

Enhanced Monitoring of NSR Statistics

 Release 25.4.1

Introduced in this release on: Fixed Systems (8700 [ASIC: K100], 8010 [ASIC: A100])(select variants only*)

*This feature is supported on:

  • 8711-48Z-M

  • 8011-32Y8L2H2FH

  • 8011-12G12X4Y-A

  • 8011-12G12X4Y-D

Enhanced Monitoring of NSR Statistics

 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.

Enhanced Monitoring of NSR Statistics

 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

Enhanced Monitoring of NSR Statistics

 Release 24.2.11

Introduced in this release on: Fixed Systems (8700) (select variants only*)

*Enhanced Monitoring of NSR Statistics is now supported on Cisco 8712-MOD-M routers.
Enhanced Monitoring of NSR Statistics Release 24.2.1

You can maintain uninterrupted network functionality during upgrades or failovers with Non-Stop Routing (NSR), ensuring consistent data across primary and standby engines. The Enhanced Monitoring of NSR Statistics feature offers metrics on NSR packet handling, providing processing times, counts, and sequence numbers in real-time. If no new packets are received, the last known statistics persist, keeping the displayed data current.

CLI:

The feature modifies the output of the show command given below:

YANG Data Model:

View enhanced NSR statistics

Obtain and analyze key metrics to assess the efficiency and robustness of BGP operations with NSR functionality.

Use this task to monitor BGP update processing speed, packet volume over intervals, and sequence number integrity to prevent packet loss and maintain network stability.

Before you begin

Ensure you have access to the device CLI and necessary permissions to run show commands.

Follow these steps to view enhanced monitoring of NSR statistics:

Procedure

Verify the key metrics to evaluate BGP operations with NSR. Monitor BGP update processing speed, packet volume over intervals, and sequence number integrity to prevent packet loss and ensure network stability.

Example:

Router# show bgp nsr

Fri Jan 30 10:18:48.171 PST PDT

BGP Process Information: 
BGP is operating in STANDALONE mode
Autonomous System: 100
Router ID: 10.1.0.1 (manually configured)
Default Cluster ID: 10.1.0.1
Active Cluster IDs:  10.1.0.1
Fast external fallover enabled
Neighbor logging is not enabled
Enforce first AS enabled
AS Path ignore is enabled
AS Path multipath-relax is enabled
Default local preference: 100
Default keepalive: 60
Graceful restart enabled
Restart time: 180
Stale path timeout time: 360
RIB purge timeout time: 600
Non-stop routing is enabled
Update delay: 120
Generic scan interval: 60

Address family: IPv4 Unicast
Dampening is not enabled
Client reflection is enabled in global config
Scan interval: 60
Main Table Version: 7034
IGP notification: IGPs notified
RIB has converged: version 1

========== Post Failover Summary for Active instance ==========

Node                Process            Read      Write    Inbound


node0_0_CPU0        Speaker          146.75      18.90       3.46

  Entered mode  Standby Ready               : Jan 30 10:00:39
  Entered mode  TCP NSR Setup               : Jan 30 10:00:39
  Entered mode  TCP NSR Setup Done          : Jan 30 10:00:39
  Entered mode  TCP Initial Sync            : Jan 30 10:00:39
  Entered mode  TCP Initial Sync Done       : Jan 30 10:00:44
  Entered mode  FPBSN processing done       : Jan 30 10:00:44
  Entered mode  Update processing done      : Jan 30 10:00:44
  Entered mode  BGP Initial Sync            : Jan 30 10:00:44
  Entered mode  BGP Initial Sync done       : Jan 30 10:00:44
  Entered mode  NSR Ready                   : Jan 30 10:00:44

Current BGP NSR state - NSR Ready achieved at: Jan 30 10:00:44
NSR State READY notified to Redcon at: Jan 30 10:16:58

NSR Post Failover Summary:

NPL Statistics:

Messages Sent: 384985 .            ACKS Received: 384985 :8
Messages Sent: 8                   ACKS Sent: 8 
Send failures: 11541 .             Send ACK Failures:0
Suspends:      11541               Resumes: 11407
Messages Processed: 8              Out of sequence drops: 8
Messages Send Drops: 0             Messages Recv Drops: 0
Sync Send Timeouts: 8

NPL Packet Processing Statistics: 

  Interval       End-Time        Avg Proc  Num of        seq num 
   (sec)                         time(us)   pkts     [start - end] 

    30     Aug 22 23:08:11.142     140         2     [     74 - 75     ] 
    60     Aug 22 23:08:11.142     233         4     [     72 - 75     ] 
   180     Aug 22 23:08:11.142     426        22     [     54 - 75     ]  


QAD Statistics:

  Messages Sent       : 512            ACKs Received       : 512       
  Messages Received   : 8              ACKs Sent           : 8         
  Send Failures       : 1              Send ACK Failures   : 0         
  Suspends            : 1              Resumes             : 1         
  Messages Processed  : 8              Out of sequence drops: 0              
Postit Summary:

  Total pending postit messages:  0
  Neighbors with pending postits: 0

Conv  Bestpath   TunnelUpd  Import     RIBUpd     Label      ReadWrite  LastUpd  
Process: Speaker

Yes   120        ---        ---        120        120        120        87531    

Rib Trigger: enabled
Last RIB down event  Jan 29 09:50:03.069 received
Last RIB convergence Jan 29 09:50:03.069 last ack received.

Address Family IPv4 Unicast converged in 87531 seconds

Review the output to conform the detailed metrics on BGP NSR packet handling over specific time intervals.

You obtain detailed NSR health data to prevent packet loss and maintain reliable network operations during critical events.