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Local Area High Speed Networks by Dr. Sidnie Feit

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Protocol Overview

This section provides a rough understanding of the major spanning treeconcepts. Later sections present detailed definitions and describe the protocol mechanisms.

Electing the Root Bridge

The first step in the STP is to choose a bridge that will act as the root of the tree. The tree that is formed will consist of paths that radiate from the root and reach every bridge and every subLAN.

The sample bridged LAN in See figure 13.3 illustrates how a LAN's root bridgeis chosen.

Figure 13.3. Electing the root bridge.

  • Every bridge is assigned a MAC address that is used as its unique bridge address. The customary convention is ...

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