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Spanning Tree Protocol

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To verify the STP guard configured on port or port-channel interfaces, enter the 

[

 

] 

command.

•

Root guard is enabled on a port that is in a root-inconsistent state.

•

Loop guard is enabled on a port that is in a listening state.

•

BPDU guard is enabled on a port that is shut down (Error Disabled state) after receiving a BPDU.

FTOS#show spanning-tree 0 guard 

Interface

Name      Instance    Sts          Guard type

---------  --------   ---------     ----------

Gi 0/1     0          INCON(Root)  Rootguard

Gi 0/2     0          LIS          Loopguard

Gi 0/3     0          EDS (Shut)   Bpduguard