Can I have two core nexus 7ks connected to a single catalyst 6509 (Sup720) using vPC?
Yes - you can have such topology.
You need to configure VPC domain on n7k. Then on both n7k, links to cat 6k configure in PoX and under PoX configure VPC X
On cat6k side this will look as legacy port-channel.
Please be aware that n7k cannot run routing protocols with cat6k via this VPC
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: