Spanning-Tree Loopguard Default - Cisco MWR 2941 Command Reference Manual

spanning-tree loopguard default

spanning-tree loopguard default
To enable loop guard as a default on all ports of a given bridge, use the spanning-tree loopguard default
command in global configuration mode. To disable loop guard, use the no form of this command.
Syntax Description
This command has no arguments or keywords.
Command Default
Loop guard is disabled.
Command Modes Global configuration (config)
Command History Release
12.2(14)SX
12.2(17d)SXB
12.2(33)SRA
15.0(1)MR
Usage Guidelines
Loop guard provides additional security in the bridge network. Loop guard prevents alternate or root ports
from becoming the designated port due to a failure that could lead to a unidirectional link.
Loop guard operates only on ports that are considered point to point by the spanning tree.
The individual loop-guard port configuration overrides this command.
Examples This example shows how to enable loop guard:
Router(config)# spanning-tree loopguard default
Router(config)#
Related Commands Command
show spanning-tree
spanning-tree guard
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
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spanning-tree loopguard default
no spanning-tree loopguard default
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.
Description
Displays information about the spanning-tree state.
Enables or disables the guard mode.
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
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