With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnDlciBnnLsDefMaxTxBtuSize
appn Dlci Bnn Ls Define Max Tx Btu Size
This attribute specifies the maximum basic transmission unit (BTU) size that can be sent on this link station. This attribute is used to negotiate the maximum BTU size that can be transmitted between a link station pair. If the link and node are HPR-capable, then this attribute must be set to a value greater than or equal to 768.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnDlciBnnLsDefMaxTxBtuSize 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.