With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpIndex
Virtual Router Passport Index
1.3.6.1.4.1.562.2.4.1.100.3.1.1.10
This variable represents the index for the vrPp tables.
Back to Nortel-Magellan-Passport-VirtualRouterMIB MIB page.
IPHost Network monitor allows you to monitor vrPpIndex 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 speech servers right now.