SMC Networks TigerSwitch 100 User Manual download pdf (Page 259)

PANNING

REE

OMMANDS

3-115

Related Commands

spanning-tree cost (3-113)

spanning-tree portfast

Use this command to set an interface to fast forwarding. Use the no form

to disable fast forwarding.

Syntax

spanning-tree portfast

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 interface. In this mode, interfaces skip the Learning

state 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 STP 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-tree edge-port, and is only

included for backward compatibility with earlier products. Note that

this command may be removed for future software versions.

Example

Console(config)#interface ethernet 1/5

Console(config-if)#spanning-tree portfast

Console(config-if)#

1 2 ... 254 255 256 257 258 259 260 261 262 263 264 ... 333 334

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SMC Networks TigerSwitch 100 User Manual Page 259