I need an opinion regarding design for our new VSS layer we are about to implement. The new VSS switches will be connected to our core (two core 7600 routers), looking over design suggestions from Cisco, it appears the best solution for HA connectivity would be to use MEC on the VSS switches (two MEC connections, one MEC group on one chassis going to both core routers and one MEC group on the other chassis going to both core routers). Now for the core routers, would we use an etherchannel group for these connections as well and assign them /30 addresses. OSPF would be configured to load balance across these two equal paths as well.
Does that sound like the best configuration in regards to HA or does someone have a better design idea?