With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
lecUnsupportedTlvs
LAN Emulation Client Unsupported Tlvs
This attribute counts the number of times an unsupported TLV was received by the LEC in either the Configuration or Join response. This counter wraps to zero when the maximum value is reached.
Back to Nortel-Magellan-Passport-LaneClientMIB MIB page.
IPHost Network monitor allows you to monitor lecUnsupportedTlvs 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.