With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpMcastCacheStatsLookupMisses
Virtual Router Ip Mcast Cache Stats Lookup Misses
This attribute indicates the total number of local cache lookup misses. It wraps around to 0 when it reaches the maximum value of 4294967295.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpMcastCacheStatsLookupMisses 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.