Command Line Interface Guide

Spanning Tree Commands 757
Default Configuration
By default, all ports are enabled for spanning-tree.
Command Mode
Interface Configuration (gigabitethernet, port-channel, tengigabitethernet,
fortygigabitethernet) mode
User Guidelines
This command has no user guidelines.
Example
The following example disables spanning-tree on 1/0/5.
console(config)#interface gigabitethernet 1/0/5
console(config-if-1/0/5)#spanning-tree disable
spanning-tree forward-time
Use the spanning-tree forward-time command in Global Configuration
mode to configure the spanning-tree bridge forward time, which is the
amount of time a port remains in the listening and learning states before
entering the forwarding state.
To reset the default forward time, use the no form of this command.
Syntax
spanning-tree forward-time seconds
no spanning-tree forward-time
• seconds — Time in seconds. (Range: 4–30)
Default Configuration
The default forwarding-time for IEEE Spanning-tree Protocol (STP) is 15
seconds.
Command Mode
Global Configuration mode.
2CSPC4.X8100-SWUM100.book Page 757 Wednesday, August 29, 2012 6:23 PM