http://thwack.solarwinds.com/thread/48491
It works for me .. use the engineers toolset SNMP MIB browser to get that table
RFC1213-MIB:ipAddrTable
OID 1.3.6.1.2.1.4.20
it will give you the ARP table for the VRF for which you specify the snmp community string in the query
configure your nexus snmp sever:
1- create the snmp context and map it to the second VRF :
snmp-server context (context name) vrf (second vrf name)
2- define the second community:
snmp-server community second_community_string
3- set the mib parameters for the second context
snmp-server mib community-map (second_community_string) context (second vrf name)