With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfLcnSourceMac
General Vc Interface Logical Channel Number Source Mac
This attribute indicates the source MAC address inserted by this LCN in the SA field of the 802.5 frames sent to the local ring.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfLcnSourceMac 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.