Symptom
The following error log would be observed along with XR-ISSU operation being aborted due to bgp process restart
bgp[1047]: %ROUTING-BGP-3-NBR_NSR_DISABLED : NSR disabled on neighbor 100.20.1.1 due to 'ip-tcp' detected the 'warning' condition 'NSR is down because the retransmission threshold exceeded (probably because downstream RP is not healthy)'
RP/0/RP0/CPU0:Jul 10 20:07:06.356 : issudir[375]: %INSTALL-ISSUDIR-1-OPERATION_ABORT : ISSU Aborted : issu-mgr reported proc restart
Conditions
The issue would be observed when XR-ISSU RUN phase is in progress and bgp is configured on the system. Due to which XR-ISSU operation aborts.
Workaround
None.
Restart the ISSU operation after clean-up.
Further Problem Description
When a XR-ISSU operation on a NCS6k system is triggered with bgp enabled on the system during the ISSU-RUN phase the operation gets aborted due bgp process restart. The bgp process restart is expected when there is a data path issue which is being pointed out by the syslog "TCP retransmissions threshold exceeded"
