Loop Guard

Switch#show spanning-tree active

Shows which ports are alternate or root ports

Switch#show spanning-tree mst

Shows which ports are alternate or root ports

Switch#configure terminal

Moves to global configuration mode

Switch(config)#spanning-tree loopguard default

Enables Loop Guard globally on the switch

Switch(config)#exit

Returns to privileged mode

Switch#show running-config

Verifies that Loop Guard has been enabled

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

NOTE: This feature is most effective when it is configured on the entire switched network.

NOTE: Loop Guard operates only on ports that are considered to be point to point by the STP.

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