Hello
Decided to add a pair of Nexus 9k into our multicast network, but scratching my head about proper way of doing that while using vPC link for upstream redundancy, considering that we using ASM and according to the cisco manual:
"A PIM adjacency between a Switched Virtual Interface (SVI) on a vPC VLAN (a VLAN that is carried on a vPC Peer-Link) and a downstream device is not supported; this configuration can result in dropped multicast packets. If a PIM neighbor relationship is required with a downstream device, a physical Layer 3 interface must be used on the Nexus switches instead of a vPC SVI."
Here is the schematic drawing:
[vpc-pim-nexus-6500-1.png](https://postimg.cc/Z9rFqWqc)
As soon as I enable link B - server looses some multicast flows (they are still being pushed by static join from 6500); if i disable link A and only leave link B up - no multicast flows at all even though "show ip mroute" shows them properly. I haven't tried to configure interface for Vlan B on the secondary nexus yet, but maybe going to give it a shot and additionally to enable an hsrp on it (don't think it will help though).
From that I read - it should work fine if i convert interconnects between my 6500 and nexuses into individual L3 links. But, I really don't want to do it as there are some other vlans going through the vpc at the moment.
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