With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrSnmpSysObjectId
Virtual Router Snmp Sys Object Id
This attribute identifies the vendor's authoritative identification of the network management subsystem contained in the entity. This value is allocated within the Structure of Management Information (SMI) enterprises subtree (1.3.6.1.4.1) and provides an easy and unambiguous means for determining 'what kind of box' is being managed.
Back to Nortel-Magellan-Passport-BaseSnmpMIB MIB page.
IPHost Network monitor allows you to monitor vrSnmpSysObjectId 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.