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Alteon OS Application Guide
Chapter 5: Spanning Tree Group
11542C4911, January 2007
Port Fast Forwarding
Port Fast Forwarding permits a port that participates in Spanning Tree to bypass the Listening
and Learning states and enter directly into the Forwarding state. While in the Forwarding state,
the port listens to the BPDUs to learn if there is a loop and, if dictated by normal STG behavior
(following priorities, etc.), the port transitions into the Blocking state.
This feature permits the GbE Switch Module to interoperate well within Rapid Spanning Tree
(RSTP) networks.
Configuring Port Fast Forwarding
Use the following CLI commands to enable Port Fast Forwarding on an external port.
>> # /cfg/port ext1 (Select port EXT 1)
>> Port EXT1# fastfwd ena (Enable Port Fast Forwarding)
>> Port EXT1# apply (Make your changes active)
>> Port EXT1# save (Save for restore after reboot)