Bridging issues in DQDB subnetworks

Bridging among DQDB subnetworks and between LANs and DQDBs is discussed. Some fundamental issues encountered during the implementation and standardization of such bridges are examined. These issues include the level of interconnection, the service requirements and performance measures, the functionality needed in DQDB notes dedicated to bridging, addressing and address mapping, routing through bridges, error and flow control, security of transmitted information, reconfiguration and fault tolerance. Approaches to solve some of the identified problems are proposed and discussed.