I have a pair of 6509s running as our core switch. I also have a few 4510s that we are looking at bringing up over 10GE. I would like to set up a redundant link to the other core as fall back but am unsure of the direction to go.
1. Leave it up to spanning tree in rapid-pvst
2. Setup L3 routing from the 4510s to the 6509s. If going this route what needs to be done with vlans.
3. ? some better fast way I can't think of.
If anyone has a good place to start looking dealing with L3 forwarding from the core to distribution switch let me know.