With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
rtgVnsIlsForwarder
rtg Vns Ils Forwarder
1.3.6.1.4.1.562.2.4.1.40.3.10.1.6
This attribute specifies the IlsForwarder component this VNS component is using. The IlsForwarder component is used to assist forwarding VNS traffic that comes in from ATM logical trunks.
Back to Nortel-Magellan-Passport-VnsMIB MIB page.
IPHost Network monitor allows you to monitor rtgVnsIlsForwarder 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.