With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfDlciEncapsulationType
General Vc Interface Dlci Encapsulation Type
This attribute indicates the encapsulation type used on this Dlci. ban indicates that SNA frames exchanged on the VC are encapsulated in RFC 1490 BAN format. ban indicates that SNA frames exchanged on the VC are encapsulated in RFC 1490 BNN format.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfDlciEncapsulationType 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.