Symptom

NCS6K router goes Not NSR-Ready started due to NPL timeout - BGP will reinitialize NSR and TCP re transmission seen. Standby threads are blocked long time. RP/B0/CB0/CPU1:May 19 01:03:16.351 UTC: bgp[1080]: %ROUTING-BGP-3-NPL_TIMEOUT : NPL timeout - BGP will reinitialize NSR RP/B0/CB0/CPU1:May 19 01:03:16.352 UTC: bgp[1080]: %ROUTING-BGP-5-NSR_STATE_CHANGE : Changed state to Not NSR-Ready RP/B0/CB0/CPU1:May 19 01:06:14.492 UTC: bgp[1080]: %ROUTING-BGP-3-NPL_TIMEOUT : NPL timeout - BGP will reinitialize NSR RP/B0/CB0/CPU1:May 19 01:09:12.596 UTC: bgp[1080]: %ROUTING-BGP-3-NPL_TIMEOUT : NPL timeout - BGP will reinitialize NSR

Conditions

When "show bgp all all policy standby" executed either through CLI or through the sensor paths

Workaround

Remove sensor-group BGP: sensor-group BGP sensor-path Cisco-IOS-XR-ipv4-bgp-oper:bgp Configure the sensor path on active ECP only. sensor-group BGP sensor-path Cisco-IOS-XR-ipv4-bgp-oper:bgp/instances/instance/instance-active Even with fix in place, do not configure the global bgp oper sensor path as it will try to access the all paths under the bgp oper path as few paths are meant for the lab/controlled environment.

Further Problem Description