This is the case. The main site has two routers, A and B. There is one remote location and its router is C. C has two links, one connected to A, and the other one to B. The traffic was not balanced, so we decided to connect both links to router A. So between router C and A would be 2 links. The thing is that just one link gets up, the other one gets down. If we disconnect the one that is up, the other link that was down then is up. I'm using 12.4(7d) in router A (3725) and 12.3(22) (1760). Is there any issue related to eigrp?
this is the eigrp configuration.
router eigrp 99
traffic-share min across-interfaces
no eigrp log-neighbor-changes
neighbor 22.214.171.124 FastEthernet0/0
Any ideas? thanks in advance for your help.