With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpForwarding
Virtual Router Ip Forwarding
This attribute indicates whether or not this VR is acting as an IP gateway in respect to the forwarding of datagrams received by, but not addressed to, this VR
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpForwarding 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.