ISIS_1.3.6.1.3.37.2.0.12 isisAreaMismatch

Trap Buffer Description

IS-IS received a level-1 Hello PDU whose area address is different from the local area address. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisCircIndex=[isisCircIndex], isisCircIfIndex=[isisCircIfIndex], isisPduFragment=[isisPduFragment], ifIndex=[ifIndex], IfName=[IfName])

The area address contained in a received Level-1 Hello message is different from any local Level-1 area address.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Error
Mnemonic Code	ISIS_AREA_MISMATCH
Trap OID	1.3.6.1.3.37.2.0.12
MIB	ISIS-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
isisSysInstance	ID of an IS-IS process.
isisSysLevelIndex	IS-IS level.
isisCircIndex	Circuit index of an interface.
isisCircIfIndex	IfIndex of an interface.
isisPduFragment	64-byte PDU header.
ifIndex	IfIndex of an interface.
IfName	Interface name.

VB Parameters

VB OID	VB Name	VB Index
1.3.6.1.3.37.1.1.1.1.1	isisSysInstance	isisSysInstance
1.3.6.1.3.37.1.2.1.1.1	isisSysLevelIndex	isisSysInstance isisSysLevelIndex
1.3.6.1.3.37.1.3.1.1.2	isisCircIfIndex	isisSysInstance isisCircIndex
1.3.6.1.3.37.1.10.1.1.2	isisPduFragment	isisSysInstance
1.3.6.1.2.1.31.1.1.1.1	ifName	ifIndex

Impact on the System

If the trap is triggered by a hardware fault of the board, route flapping may occur and the CPU usage will increase.

If the trap is triggered by an incorrect configuration, neighbors cannot be established, and routes cannot be learnt from each other.

Procedure

1. According to the IS-IS packet format defined in ISO10589, find the [isisPduFragment] field (in hexadecimal notation) in the command output to check the system ID of the source device.Run the display this command in the IS-IS view on the source device to check whether the area address of the source device is the same as that of the local device.

If the alarm is generated, go to step 3.
If the alarm is not generated, go to step 2.

2. (Exercise caution when running the undo network-entity command.) Run the network-entity command in the IS-IS view of the device to configure a new IS-IS area address that is the same as the area address of the local device.Check whether the fault is rectified.

If yes, go to Step 4.
If not, go to step 3.

3. Collect log and configuration information, and contact Huawei technical support personnel.

4. End.