Command Line Interface Guide

768 Spanning Tree Commands
Syntax
spanning-tree portfast default
no spanning-tree portfast default
Default Configuration
Portfast mode is disabled by default.
Command Mode
Global Configuration mode
Usage Guidelines
This command only applies to access ports.
NOTE: This command should be used with care. An interface with
PortFast mode enabled is moved directly to the spanning tree forwarding
state when linkup occurs without waiting for the standard forward-time delay.
Setting a port connected to another switch into PortFast mode may cause an
accidental topology loop and disrupt switch and network operations.
Example
The following example enables Portfast mode on all access ports.
console(config)#spanning-tree portfast default
spanning-tree port-priority
Use the spanning-tree port-priority command in Interface Configuration
mode to configure port priority. To reset the default port priority, use the no
form of this command.
Syntax
spanning-tree port-priority priority
no spanning-tree port-priority
• priority — The port priority. (Range: 0–240)
2CSPC4.X8100-SWUM100.book Page 768 Wednesday, August 29, 2012 6:23 PM