Troubleshooting Unified ISSU Problems
If the unified ISSU procedure stops progressing:
Open a new session on the master Routing Engine and issue the request system software abort in-service-upgrade command.
Check the existing router session to verify that the upgrade has been aborted.
An “ISSU: aborted!” message is provided. Additional system messages provide you with information about where the upgrade stopped and recommendations for the next step to take.
See request system software abort in-service-upgrade (ICU) for more information.