MSTP/4/PORT_BPDU_GUARDED

Message

MSTP/4/PORT_BPDU_GUARDED: The edge port with BPDU protection enabled will be shut down, because it received a BPDU packet that may be used to initiate an attack. (InstanceID=[InstanceID], PortIndex=[PortIndex], IfIndex=[IfIndex], PortName=[PortName])

Description

Specify that the edge port receives the BPDU packets when BPDU protection was enabled

Parameters

Parameter Name	Parameter Meaning
InstanceID	Indicates the instance ID.
PortIndex	Indicates the port ID.
IfIndex	Indicates the interface index.
PortName	Indicates the port name.

Possible Causes

The edge port received BPDUs, and BPDU protection was enabled globally.

Procedure

1. Check whether the interface is directly connected to a user terminal and can be specified as an edge port.

If the interface is directly connected to a user terminal and therefore can be specified as an edge port, go to Step 2.
If the interface is indirectly connected to a user terminal and therefore cannot be specified as an edge port, go to Step 3.

2. Locate the source of the BPDUs on the interface and check whether the malicious attack exists.

If the malicious attack exists, go to Step 4.
If the malicious attack does not exist, go to Step 3.

3. Run the undo stp edged-port command and the undo shutdown command in the interface view to delete the configuration of the edge port and restart the interface. Then, check whether the alarm is cleared. If the alarm persists, go to Step 4.

4. Collect alarm information and configuration information, and then contact technical support personnel.