VPCs: Peer-Link and Keepalive Link for multiple devices

[modular182]

Can one peer-link and keepalive link set be used for multiple, different VPCs? For instance, let's say i have 2 Nexus Core switches. I also have 3 nexus leaf switches and a Catalyst 8300 that will be an edge device. I want all 4 leaf/edge devices to connect to the 2 core switches via VPC. Can all 4 leaf/edge devices use the same peer-link and keepalive link set or do you need to create 4 peer-links and 4 keepalive links? Thanks!

[MHM Cisco World]

NO, you can not why?
Peer-link and Keepalive use only between TWO NSK run same vPC domain. 

if you connect this vPC domain to as much as vPC port-channel you need only one peer-link and one keepalive 
what you need to be care here is allow you use in vPC port-channel in Peer-link trunk. 

[balaji.bandi · Accepted solution]

One vPC domain 1 Peer-link and one keepalive live.

Does not matter how many child VPC connect to parent VPC.

some example (if i undertand your requirement correctly)

https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/nx-os-software/217274-understand-virtual-port-channel-vpc-en.html