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Non-broadcast multi-access (NBMA) functionality was added to RIP and OSPF routing protocols on the Avaya Multiservice switch software. Support for this functionality was added to enable route exchange over nonbridged connections (routed PVCs).
This feature makes it possible for the switch to exchange routing information over nonbridged connections (routed virtual switch ports). NBMA functionality has been added to the RIP and OSPF routing protocols in the switch software and has been tested with other routers.
Operation of OSPF over NBMA is almost identical to operation of OSPF over broadcast LANs. Flooding uses the designated router, and both subnets are represented identically within the OSPF link-state database by network-LSAs. The only real difference between broadcast subnets and NBMA subnets is in the discovery of neighboring routers. On broadcast networks, a router can discover its neighbors dynamically by sending multicast Hello packets; on NBMA networks, a router's neighbors may have to be configured.This feature makes it possible for you to set up an IP interface as NBMA. Each IP routing protocol may then have IP addresses that are designated as NBMA neighbors.
Each IP routing protocol may then have IP addresses that are designated as NBMA neighbors. This allows the switch to work with other routers that are routed over PVCs.
CAUTION: The NBMA feature is not backward compatible. If you have NBMA interfaces set up and need to downgrade from v6.1 to a 5.2 version of software, contact technical support.
This section contains procedures for the following tasks:
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