With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpIpPortLogicalIfBroadcastAddress
Virtual Router Passport Ip Port Logical If Broadcast Address
This attribute specifies the broadcast address for this IpLogicalIf. This attribute is ignored if the IpPort mediaType is ppp (Point to Point Protocol). If the value is 0.0.0.0, the actual broadcast address will be derived from the IP address of this LogicalIf and the netmask attribute.
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrPpIpPortLogicalIfBroadcastAddress 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.