With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionX25VcSubnetTxPktSize
trace Session X25 Vc Subnet Tx Packet Size
1.3.6.1.4.1.562.2.4.1.106.3.2.2.10.1.23
This attribute displays the locally negotiated size of the data packets on this Vc.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionX25VcSubnetTxPktSize 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.