With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpMcastFwdOifProtocol
Virtual Router Ip Mcast Forward Oif Protocol
This attribute indicates the multicast routing protocol via which this multicast forwarding outinterface entry was learned.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpMcastFwdOifProtocol on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel switches right now.