With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
ipiFrRType
ipi Fr R Type
This attribute indicates whether a route is going to a host or a subnet or a network.
Back to Nortel-Magellan-Passport-IpiFrMIB MIB page.
IPHost Network monitor allows you to monitor ipiFrRType 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 secure routers right now.