I am having difficulty getting HSRP working beween two 2811 routers. When I type 'show standby' both routers think that they are active, and that the other is 'unknown'.
If I do a 'debug standby packets', I can see that 2811-1 is sending and receiving HSRP packets, but that 2811-2 is only sending, but not receiving HSRP packets.
Both routers can ping each other without a problem, indicating that the VLAN trunking between the switches is working correctly.
I know that HSRP uses muticasts, but there is absolutely nothing configured on the switches to block broadcasts or multicasts. (there is also no L3 VLAN on the 4006 switches).
Any idea how I can troubleshoot this further?