I am stumped on designing a layer 2 redundant design for our data center. Right now we are the 3 tier Cisco model, core, dist, access and the vmware servers are located on 2 trunked access layer switches each with routed uplinks to the distribution switches. We need to add2 more switches to the same vlans for vmware vmotion to work properly, i.e. trunk those vlans over to 2 other switches. Do I turn the distribution switches into layer 2 or add more switches? I am unable to come up with a bullet proof design. Everything except using vss or a nexus 7000 vpc has at least one point of failure. The servers are all dual nic teamed.
Just curious if anyone else is having this delima and how they figured out how to make it into a reliable design.