Accton Technology ES4524D, ES4548D, 24/48-Port manual Spanning-tree portfast

51 Spanning Tree Commands

cause forwarding loops, they can pass directly through to the spanning tree forwarding state. Specifying Edge Ports provides quicker convergence for devices such as workstations or servers, retains the current forwarding database to reduce the amount of frame flooding required to rebuild address tables during reconfiguration events, does not cause the spanning tree to initiate reconfiguration when the interface changes state, and also overcomes other STA-related timeout problems. However, remember that Edge Port should only be enabled for ports connected to an end-node device.

• This command has the same effect as the spanning-tree portfast.

Example

Console(config)#interface ethernet ethernet 1/5

Console(config-if)#spanning-tree edge-port

Console(config-if)#

Related Commands

spanning-tree portfast (51-14)

spanning-tree portfast

This command sets an interface to fast forwarding. Use the no form to disable fast forwarding.

Syntax

[no] spanning-tree portfast

Default Setting

Disabled

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

•This command is used to enable/disable the fast spanning-tree mode for the selected port. In this mode, ports skip the Discarding and Learning states, and proceed straight to Forwarding.

•Since end-nodes cannot cause forwarding loops, they can be passed through the spanning tree state changes more quickly than allowed by standard convergence time. Fast forwarding can achieve quicker convergence for end-node workstations and servers, and also overcome other STA related timeout problems. (Remember that fast forwarding should only be enabled for ports connected to a LAN segment that is at the end of a bridged LAN or for an end-node device.)

•This command is the same as spanning-treeedge-port, and is only included for backward compatibility with earlier products. Note that this command may be removed for future software versions.

51-14