With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrSnaMacEntries
Virtual Router Sna Mac Entries
This attribute indicates the current total number of entries in the DirectoryEntry table.
Back to Nortel-Magellan-Passport-Nortel-Magellan-Passport-SnaMIB MIB page.
IPHost Network monitor allows you to monitor vrSnaMacEntries 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.