Root Guard

Switch(config)#interface fastethernet 0/1

Moves to interface config mode

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

Enables Root Guard on the interface

Switch#show running-config

Verifies Root Guard is enabled on the interface

NOTE: You cannot enable both Root Guard and Loop Guard at the same time.

NOTE: Root Guard enabled on an interface applies to all VLANs to which the interface belongs.

NOTE: Do not enable Root Guard on interfaces to be used by the UplinkFast feature.

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