I have configured ether-channel b/w 6500 and 3750 stack, and now the interface in ether-channel doesnt work and caused 3750 stack to go down.
I checked the interface on stack switch and found the ether-channel down, but where as the connecting port on 6500 was up.
I have already changed the fiber connections and also tried different ports at both ends but still the same issue.Hence have shut down one of the link and running without redundancy. If i enable the port then the port-channel goes down on 3750 not sure why is this happening.
Your help would be greatly appriciated.