Enterasys 802.1Q Spezifikationen PDF herunterladen (Seite 103)

9033820-03 Spanning Tree Concepts 95

There are five (5) states that the ports can be in for spanning tree:

• Blocking: A port in this state does not participate in the transmission

of frames, thus preventing duplication arising through multiple paths

existing in the active topology of the bridged LAN.

• Listening: A port in this state is preparing to participate in the

transmission of frames. The transmission of frames is temporarily

disabled in order to prevent temporary loops, which may occur in a

bridged LAN during the lifetime of this state as the active topology of

the bridged LAN changes.

• Learning: A port in this state is preparing to participate in the

transmission of frames.

• Forwarding: A port in this state is participating in the transmission of

frames.

• Disabled: A port in this state does not participate in the transmission

of frames or the operation of the spanning tree process.

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Enterasys 802.1Q Spezifikationen Seite 103