[c-nsp] Multicast route limits on Nexus 3k

[Martin Barry]

Hi all

We are running into the following error on a Nexus 3k:

        %IPFIB-2-FIB_MCAST_LIMIT_REACHD: Multicast Route Limit Exceeded.

It's a bit disconcerting when you get zero hits for a Google search. :-/

This PDF
http://www.cisco.com/en/US/docs/switches/datacenter/nexus3000/sw/configuration_limits/503_u1_1/n3k_config_limits_503_u1_1a.pdf
implies that if you have any other features activated the limit on multicast
routes is 2048.

Checking multicast routes in the global table as well as in all VRFs shows
we only have around 1750, although a single VRF has 1720 of them.

I can't seem to figure out what show commands exist, if any, to see what the
current limit is. Any ideas?

Our current thesis is that the interaction between VRFs and multicast is
lowering the limit. Anyone come across something similar?

cheers
Marty