With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrMmIpxMaxHeapSpace
Virtual Router Mm Ipx Max Heap Space
1.3.6.1.4.1.562.2.4.1.100.2.10.1.3
The maximum percentage of this VR's dynamic memory which can be allocated to this VR's IPX. An attempt to allocate memory in excess of this limit forces IPX to shut down.
Back to Nortel-Magellan-Passport-VirtualRouterMIB MIB page.
IPHost Network monitor allows you to monitor vrMmIpxMaxHeapSpace 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 speech servers right now.