HSRP on 3825 Routers-not failing over

[mikeoxlong]

We are having issues with 2 3825's running HSRP. Each one is attached to its own firewall so if there is a failure they fail over together to the other set. After the failover the active routers appear to just stop responding after time and it fails over again. Each router is aware of the state change but it is almost as they appear to both think they are active even though a failover has occured.

[Roberto Salazar]

Please post your topology and the show standby, show log from each of the router.

[sean]

Is one set to preempt the other? Also, before testing, do a:

sh standby brief

to see what state each router is in for each standby group. Also, as somebody has already requested, it would be helpful to see a simple drawing of your topology.

[mikeoxlong]

show run and log attached. It is not a very complex situation and have since disabled HSRP, we were using preempts. We have four interfaces each a different subnet, routing through the 3825, and even with the HSRP off, and the standby router powered off, we still get hangs. We were seeing :%CDP-4-DUPLEX_MISMATCH: duplex mismatch disc

overed on FastEthernet0/1/2 (not half duplex), with Ketchup GigabitEthernet2/0/4

(half duplex).

These appeared for all four interfaces, we managed to set the other 3 to 100 Full which remedied those sending type mismatches, but we still get it from the one interface. But would these cause the router to hang??

Thanks