With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vctDnaDefaultRecvFrmNetworkPacketSize
VC Tester Dna Default Recv Frm Network Packet Size
1.3.6.1.4.1.562.2.4.1.5130.2.13.1.3
This attribute indicates the default local receive packet size from network to DTE for all calls using this particular Dna. Attribute packetSizes has to be set with corresponding value.
Back to Nortel-Magellan-Passport-VcTesterMIB MIB page.
IPHost Network monitor allows you to monitor vctDnaDefaultRecvFrmNetworkPacketSize 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.