With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfDlciRdevAddrTable
General Vc Interface Dlci Rdev Address Table
This group defines the LAN MAC address.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfDlciRdevAddrTable 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.