With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIfNumberOperEntry
Virtual Router If Number Operational Entry
1.3.6.1.4.1.562.2.4.1.100.105.1
An entry in the vrIfNumberOperTable.
Back to Nortel-Magellan-Passport-VirtualRouterMIB MIB page.
IPHost Network monitor allows you to monitor vrIfNumberOperEntry 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 secure routers right now.