With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
rtgTopNodeLgIndex
rtg Top Node Lg Index
This variable represents the index for the rtgTopNodeLg tables.
Back to Nortel-Magellan-Passport-BaseRoutingMIB MIB page.
IPHost Network monitor allows you to monitor rtgTopNodeLgIndex 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.