Spanning-Tree Guard - Cisco MWR 2941 Command Reference Manual

spanning-tree guard

spanning-tree guard
To enable or disable the guard mode, use the spanning-tree guard command in interface configuration
mode. To return to the default settings, use the no form of this command.
Syntax Description
loop
root
none
Command Default Guard mode is disabled.
Command Modes Interface configuration (config-if)
Command History Release
12.2(14)SX
12.2(17d)SXB
12.2(33)SRA
15.0(1)MR
Examples
This example shows how to enable root guard:
Router(config-if)# spanning-tree guard root
Router(config-if)#
Related Commands Command
show spanning-tree
spanning-tree loopguard default
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
626
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 Supervisor Engine 720.
Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
This command was integrated into Cisco IOS Release 12.2(33)SRA.
This command was integrated into 15.0(1)MR.
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
Description
Displays information about the spanning-tree state.
Enables loop guard as a default on all ports of a given bridge.
OL-23890-01