With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpSrtBpDupLanIdOrTreeErrors
Virtual Router Passport Srt Bridge Port Dup Lan Id Or Tree Errors
This attribute specifies the number frames received which contain duplicate LAN IDs or Tree errors. This attribute is helpful in debugging problems in networks which contain older IBM-SR bridges. This counter will wrap to zero when it exceeds its maximum.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpSrtBpDupLanIdOrTreeErrors 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 multiplexers right now.