Cisco Bug: CSCun99636 - Standby Supervisor Stuck on Reload in 4k VSS due to SNMP Server traps
May 03, 2019
- Cisco IOS
Known Affected Releases
Symptom: In a 4500X VSS system running 03.05.XX, after a failover between the Active and Standby switches, the former active (now standby) supervisor engine will fail to join VSS on bootup due to a mismatched configuration between the two switches. Conditions: The mismatched configuration is triggered by the command "no snmp-server enable traps license usage error display", which will be displayed in the syslog after the standby initially tried to re-join the VSS. Subsequent reloads of the standby member after the initial failure will display the the failure reason as a version mismatch, and not a command mismatch. The behavior is triggered by modifying SNMP server traps in such a way that "no snmp-server enable traps license" is entered into the configuration. For example, issuing "snmp-server enable traps" followed by "no snmp-server enable traps" will trigger this behavior.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases