I'm connecting a Cisco 2851 router to a Layer 3 3750-X stack (2 switches). The Gi0/0 interface connects to an access port on the stack master.
How can I achieve redundancy from the 2851 to the stack member? Throw another HWIC into the router and connect to the stack member? Or is there not an option
I'm using EIGRP between this location (2851) and our headquarters (2851).
Best Answer
The other option is to use the second physical interface as a second subnet and let eigrp from a second neighbor relationship. If the speeds are the same you can do equal cost load balancing. Finally 2 separate L3 links are easier to troubleshoot than a port channel and you don't have to have the exact same hardware. Its a matter of style. I am assuming you are running eigrp between the switch and the router. If you are not then 2 static default routes will do the routing trick.