I am having issues with getting out 2811s to failover from the main link to the back up link. I have a Main router with 2 sites connected to it. Both sites have a fiber/ethernet connection a T1/serial link. The fiber is the main link and the T1 is the backup. I am running EIGRP and have static entries for both as default just with a higher metric for the T1. I think what may be causing me the problem is that when we upgraded the main site router for more ports we used switch ports(vendor lead me that way) and had to create VLANs to pass the traffic. We have had 2 times now where the fiber went down and it didn't failover. For some reason it is not shutting down the interface even tho the router can't communicate with the other router. Can I make this failover and if so what do I need to do?
I have this problem too.