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DGS-6600 Series Switch m spanning-tree guard root

CLI Reference Guide

979

spanning-tree guard root

To enable the guard mode, use the spanning-tree guard command. To return to

the default settings, use the no form of this command.

spanning-tree guard root

no spanning-tree guard root

Syntax None.

Default Disabled.

Command Mode Interface configuration.

Usage Guideline This feature is used in a service-provider environment where the network

administrator needs to prevent a low speed port becoming a root port for the

local bridge networks. This configuration will take effect on all the spanning-tree

versions. Both the physical port and the port-channel interfaces are valid for this

command.

Example This example shows how to configure eth3.1 to prevent if from becoming a root

port.

Verify the settings by entering the show spanning-tree interface command.

Switch(config)#interface eth3.1

Switch(config-if)# spanning-tree guard root