Source Route Bridging Scalability Issues

In source-route bridging (SRB), a source node finds another node by sending explorer packets. An all-routes explorer packet will flood the network with explorer packets. As the number of nodes grows, scalability is affected. The amount of explorer frames can also affect the destination Token Ring. Furthermore, the diameter of an SRB network is limited to seven hops. For more information on SRB, see Chapter 3, "Application Considerations." To reduce the amount of traffic on the network, do the following:

• Limit the size of flat, bridged networks

• Use routing to segment the network

• Use IP or IPX to transport NetBIOS traffic versus NetBEUI

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