Hi experts,
I know that the rule is as simple as "a frame that enters the vPC peer switch from the peer link cannot exit the switch from a vPC member port."
However is there any hiden conditions?
For example, I have a simple topology with two N7K in one vPC peer. It has one vPC port-channel connected with a down stream regular switch. The switch connects with a server. The server is in vlan 100. N7Ks run HSRP as its gateway.
On the peer-link, there is the vlan 999 used to build EIGRP adjacency.
Normally when I ping the server from N7K-1, it goes directly to the server.
Then I shut down the Vlan 100 interface on N7K-1. I can still ping the server from N7K-1. If I do traceroute, the traffic is sourced from the Vlan 999 interface. The next hop becomes Vlan 999 interface on N7K-2. So the traffic traverses the peer-link and then gets forwarded out of the vPC port... Is it not against the loop prevention rule??
Thanks...
