With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frAtmDlciSiwfLastUnknown1483ProtocolHeader
Frame Relay Atm Dlci Siwf Last Unknown1483 Protocol Header
This attribute identifies the most recent unrecognized protocol header that was received from the ATM connection. All the RFC 1483 protocols described in sections 5.3.1.1 through 5.3.1.3 of FRF.8 are supported except ARP.
Back to Nortel-Magellan-Passport-FrameRelayAtmMIB MIB page.
IPHost Network monitor allows you to monitor frAtmDlciSiwfLastUnknown1483ProtocolHeader 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.