Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
spanning-tree guard
spanning-tree gua rd
To enable root guard, use the spanning-tree guard command. To disable r oot gua rd, use the no form of
this command.
spanning-tree guard {loop | roo t | no ne}
no spanning-tree guard
Syntax Description
Defaults Root guard is disabl ed.
Command Modes Interface configur ation mode
Examples This example shows how to enable root guard:
Switch(config-if)# spanning-tree guard root
Switch(config-if)#
Related Commands
loop Enables the loop guard mode on the interface.
root Enables root guard mode on the interface.
none Sets the guard mode to none.
Command Description
show spanning-tree Displays spanning-tree information.