Spanning-Tree Guard - Cisco 4500M Command Reference Manual

spanning-tree guard

spanning-tree guard
To enable root guard, use the spanning-tree guard command. To disable root guard, use the no form of
this command.
Syntax Description
loop
root
none
Defaults
Root guard is disabled.
Command Modes
Interface configuration
Command History Release
12.1(8a)EW
12.1(12c)EW
Examples
This example shows how to enable root guard:
Switch(config-if)# spanning-tree guard root
Switch(config-if)#
Related Commands
show spanning-tree
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-426
spanning-tree guard {loop | root | none}
no spanning-tree guard
Enables the loop guard mode on the interface.
Enables root guard mode on the interface.
Sets the guard mode to none.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Loop guard support was added.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
78-16201-01