With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpTcpRetransSegs
Virtual Router Ip Tcp Retrans Segs
The number of segments retransmitted that is, the number of TCP segments transmitted containing one or more previously transmitted octets.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpTcpRetransSegs 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 modems right now.