Let explain my current topology briefly and what i am planning to do. Currently i have about 20 3560's that i will be putting into layer 3 and running EIGRP soon. Right now they are in layer 2 connecting to a 4506 which is doing inter vlan routing. I am planning to purchase another 4506 so i can run GLBP, mainly for the servers in our data center. Currently the 20 3560s are connected via dark fiber to our 4506 gbic blade. I would like to connect all of my servers to 2 4506's and run GLBP on just a couple vlans. Each server would connect both 4506's. My question is since all of my 3560's only have one physical link back to the data center would there be any problems if i connected half to one 4506 and the other half to the other 4506? With HSRP i don't think this would work since there can only be one active switch, but with GLBP there could be 2 or more switches load balancing. What i am wanting to achieve is LB and failover. If i loose a 4506, the servers still have connectivity to the other 4506. same with my 3560s. if i lose one 4506 only half of them will lose connectivity. Does my this sound like it will work? Will i run into any problems?