Spanning Tree Protocol Parameters
A.3.5 Handling Duplicate Paths
When the active topology of the network is determined, all packets between any two nodes in the network use only one path. Where a duplicate path exists, the
A.3.6 Remapping Network Topology
If there is a change in the network topology due to a failure or the removal or addition of any active components, the active topology also changes. This may trigger a change in the state of some blocked ports.
The following describes the five (5) states of the ports when using 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.
Spanning Tree Concepts
