MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.23 hwMstpProNewPortLoopGuarded

Description

MSTP/4/PROLGEXP:OID [oid] The MSTP process's instance's LOOP-Protection port did not receive BPDU packets in prescriptive time. (ProcessID=[INTEGER], InstanceID=[INTEGER], PortID1=[INTEGER], PortID2=[INTEGER], PortID3=[INTEGER], PortID4=[INTEGER], PortIDFlag=[INTEGER], IfIndex=[INTEGER], PortState=[INTEGER], PortName=[STRING])

A port of MSTP process enabled with loop protection failed to receive BPDUs within a specified period, and was set to be in the Discarding state.

Attribute

Alarm ID	Alarm Severity	Alarm Type
1.3.6.1.4.1.2011.5.25.42.4.2.23	Warning	communicationsAlarm(2)

Parameters

Name	Meaning
oid	Indicates the MIB object ID of the alarm.
ProcessID	Indicates the MSTP process ID
InstanceID	Indicates the instance ID.
PortID1	Indicates ID 1 of the port in the MSTP process.
PortID2	Indicates ID 2 of the port in the MSTP process.
PortID3	Indicates ID 3 of the port in the MSTP process.
PortID4	Indicates ID 4 of the port in the MSTP process.
PortIDFlag	Indicates the port flag.
IfIndex	Indicates the port index.
PortState	Indicates the port state.
PortName	Indicates the port name.

Impact on the System

The interface will not forward data.

Possible Causes

The peer switch did not send the BPDUs to the local switch within the specified period. The possible cause was that the spanning tree function was disabled on the peer switch.

The links connected to the peer were congested. Check whether the traffic was normal.

Procedure

Run the display stp [ process process-id ] [ instance instance-id ] [ interface interface-type interface-number | slot slot-id ] [ brief ] command to check whether STP is disabled on the interfaces that are directly connected.
- If so, go to Step 3.
- If the alarm is not cleared, go to Step 2.
Run the display this interface command in the interface view to check the percentage of the rate at which the interface receives packets to the total bandwidth and then determine whether congestion occurs.
- If so, go to Step 4.
- If not, go to Step 5.
Run the stp enable command in the interface view to enable STP. Then, check whether the alarm is cleared.
- If the alarm is cleared, go to Step 6.
- If the alarm is not cleared, go to Step 2.
Repair the physical link and then check whether the alarm is cleared.
- If the alarm is cleared, go to Step 6.
- If not, go to Step 5.
Collect alarm information and configuration information, and then contact technical support personnel.
End.

Related Information

None.