With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpMcastPimNbrUpTime
Virtual Router Ip Mcast Pim Neighbor Up Time
This attribute indicates the time since this PIM neighbor became a neighbor of this local router.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpMcastPimNbrUpTime 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 multiplexers right now.