strange behavior of HSRP

[Garry Kabbay]

Hi Experts

I am facing a very strange issue regarding HSRP in which secondary router is showing the correct role of standby and also showing primary router as active router. But Primary router is saying Active is local but standby unknown. Seems Primary router is not in Sync. Moreover, Secondary router is is unable to ping standby Virtual IP, but able to ping Primary Router's Interface IP. and Primary route is able to ping interface IP of Secondary router and Standby virtual IP.

Topology is : R1 (Primary) Sub interface config--->Trunk port L2 Switch (Two switches in Fabric path) Trunk port--->R2 (Secondary) Sub interface config.

Same Topology is working on other side and showing correct roles of Active and Standby. dont know what is missing here or it is something else.

Please Help.

Regards

Gary

[Torbjørn]

Is IGMP snooping enabled on any device involved? Can you see the expected packets if you enable debug logging 'debug standby packets'?

[MHM Cisco World]

debug standby <<- share output of this command after apply to both active and standby 

Thanks A Lot
MHM

[balaji.bandi]

what device and IOS code running?

where is the STP root for that VLAN ?

can you post sample config and output which you explained in the post ?