HSRP isn't meant for that type of configuration. Why not just use one link as a backup link....or load balance each? If one link drops, the other will still route the traffic.
I had a problem similar to yours...One of our serial interfaces was having frame slips and bit errors. After awhile, the bit errors would cause the interface to drop. Once I cleared the interface the interface would go back up for awhile.
a 24 bit subnet-mask is fine.the ip subnet-zero command enables you to use the first octet of a subnetted network. Without ip subnet-zero, the first octet is wasted.
Do you have your subnet mask set to 252?do you have ip subnet-zero enabled?Just make sure the IPs for your routers are set in the same subnet.Are the interfaces on the routers up/up?
Oops,I forgot the part that the interface will still be considered up unless the RF module itself (or whatever is directly connected to the Ethernet interface) drops connectivity. I'm used to satellite shots with backup RF links. Since the MUX goin...