With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxDlciErrorLongFrmFromIf
Frame Relay Mux Dlci Error Long Frm From If
1.3.6.1.4.1.1570.1.4.13.1.16
This attribute counts the frames received with number of octets in the information field greater than the maximum frame size provisioned in the component pointed to by the applicationName. When the count reaches maximum it wraps to zero. Frames whose lengths are greater than the hardware receive buffer are discarded by the Framer and are therefore not included in this count.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxDlciErrorLongFrmFromIf 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.