MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.3 hwMstpiBridgeLostRootPrimary

Trap Buffer Description

This bridge is no longer the root bridge of the MSTP. (InstanceID=[InstanceID])

The device is no longer the root bridge.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Notice
Mnemonic Code	LOST_ROOT_PRIMARY
Trap OID	1.3.6.1.4.1.2011.5.25.42.4.2.3
MIB	HUAWEI-MSTP-MIB
Alarm ID	This is an event trap and does not involve alarm ID.
Alarm Name	This is an event trap and does not involve alarm name.
Alarm Type	This is an event trap and does not involve alarm type.
Raise or Clear	This is an event trap and does not involve alarm generation or clearance.
Match trap	-

Trap Buffer Parameters

Parameter	Description
InstanceID	Indicates the instance ID.

VB Parameters

VB OID	VB Name	VB Index
1.3.6.1.4.1.2011.5.25.42.4.1.19.1.1	hwMstpInstanceID	hwMstpInstanceID

Impact on the System

The actual network topology may not be the same as the expected one.

Possible Causes

Cause 1: This bridge received BPDUs with higher priorities. Cause 2: The priority of another bridge is modified to be higher than the root bridge priority.

Procedure

Cause 1: This bridge receives BPDU packets of higher priority.

1. Check whether the newly added physical link is the required one.

If the physical link is required, go to Step 2.
If the physical link is not required, go to Step 3.

2. Run the display stp [process process-id] [instance instance-id] [interface interface-type interface-number | slot slot-id | vsi vsi-name pw pw-name] [brief] command to check whether STP information of each port is consistent with protocol calculation results.

If STP information is consistent with protocol calculation results, no action is required.
If STP information is inconsistent with protocol calculation results, go to Step 4.

3. Deploy the network topology correctly and check whether the alarm is cleared. If the alarm persists, go to Step 4.

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

Cause 2: The bridge priorities of other bridge is modified to be higher than the root bridge priority.

1. Run the display stp [process process-id] [instance instance-id] [interface interface-type interface-number | slot slot-id | vsi vsi-name pw pw-name] [brief] command to check whether the priority change operation on the network topology is normal.

If the operation is normal, no action is required.
If the operation is abnormal, go to Step 2.

2. Run the stp [instance instance-id] priority priority command in the system view to reconfigure the priority of the local bridge as required. Alternatively, run the undo stp [instance instance-id] priority or undo stp [instance instance-id] root command to restore the default bridge priority. Check whether the alarm is cleared.If the alarm persists, go to Step 3.

3. Collect alarm and configuration information, and contact technical support personnel.