Users Guide
• If a BPDU is received from a remote device, BPDU guard places the port in an Err-Disabled Blocking
state and no trac is forwarded on the port.
• If no BPDU is received from a remote device, loop guard places the port in a Loop-Inconsistent Blocking
state and no trac is forwarded on the port.
To display the type of STP guard (Portfast BPDU, root, or loop guard) enabled on a port, enter the show
spanning-tree 0 command.
Spanning Tree Protocol (STP)
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