NCM - 2022.3 - Job - Update Inventory - Cisco ISR 4451 - IOS - VER: 16.12.3 - Error Does not respond to SNMP queries...

Have you by any chance opened a support case? I can escalate to our engineering team for investigation

Did you manage to get this resolved? Since upgrading to 2022.3 all our Cisco ISR 4000 series are coming up with the same error, regardless of IOS version.

All other SNMP type queries seem to work fine. It appears to just be the inventory job with the Collector.Service.log shows the error "Object reference not set to an instance of an object".

There is an issue with 2022.3 where some routers will fail inventory for the Bridge MIB

The work around is to remove the routers from the inventory job that is gathering the Bridge Mib and have their own inventory without the Bridge Mib

This issue is resolved in the 2022.4.x GA release, and NCM will not fail the devices based on Routers not responding to the Bridge Mib