Users Guide

Table Of Contents
Layer 2 Switching Commands 831
Gi1/0/1 Designated Forwarding 20000 128.1
Gi1/0/2 Designated Forwarding 20000 128.2
spanning-tree
Use the spanning-tree command in Global Configuration mode to enable
spanning-tree functionality. To disable spanning-tree functionality, use the no
form of this command.
Syntax
spanning-tree
no spanning-tree
Default Configuration
Spanning-tree is enabled.
Command Mode
Global Configuration mode
User Guidelines
This command has no user guidelines.
Example
The following example enables spanning-tree functionality.
console(config)#spanning-tree
spanning-tree auto-portfast
Use the spanning-tree auto-portfast command to set the port to auto portfast
mode. This enables the port to become a portfast port if it does not see any
BPDUs for 3 seconds after a link up event. Use the no form of this command
to disable auto portfast mode.
Syntax
spanning-tree auto-portfast
no spanning-tree auto-portfast