I have 14 buildings in my Campus Area Network. The 13 buildings have 2 fiber pair running to the core (14th building). I am using stacked 3750 switches in each building and want to know how I can create routing redundancy between each spoke and the hub. I know that you can use etherchannel for trunk links. Each building has 5 floors and I am running etherchannel from floors 2-4 down to the first floor and then routing over to the core. Before the upgrade to 3750 switches I was running hsrp. I guess my second quesiton is there a performance increase in stacking and creating redundant layer 3 routed links to the core or split the stacks and run hsrp?
Thanks in advance,