ISIS_1.3.6.1.3.37.2.0.2 isisManualAddressDrops

Trap Buffer Description

Some area addresses were discarded because the number of area addresses exceeded three. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisManAreaAddr=[isisManAreaAddr], isisManAreaAddrExistState=[isisManAreaAddrExistState])

There were more than three area addresses and the local area address was discarded.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Critical
Mnemonic Code	ISIS_MANUAL_ADDRESS_DROPS
Trap OID	1.3.6.1.3.37.2.0.2
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.
isisManAreaAddr	IS-IS area address.
isisManAreaAddrExistState	State of an area address.

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
1.3.6.1.3.37.1.1.2.1.2	isisManAreaAddrExistState	isisSysInstance isisManAreaAddr

VB OID

VB Name

VB Index

1.3.6.1.3.37.1.1.1.1.1

isisSysInstance

1.3.6.1.3.37.1.2.1.1.1

isisSysLevelIndex

isisSysInstance

isisSysLevelIndex

1.3.6.1.3.37.1.1.2.1.2

isisManAreaAddrExistState

isisSysInstance

isisManAreaAddr

Impact on the System

The Level-2 area addresses of the local IS-IS system may be lost.

Possible Causes

On a Level-1-2 device, IS-IS leaked Level-1 area addresses to the Level-2 area, increasing the area addresses of the Level-2 area to more than 3.

In this case, IS-IS uses the top three smallest area addresses as the Level-2 area addresses, causing address loss in the local Level-2 area.

Procedure

1. Run the display isis lsdb level-1 verbose command to view details about the Level-1 LSDB. Based on the information about the AREA ADDR field in the LSP with the fragment number being 0, you can determine whether the number of Level-1 area addresses exceeds 3.

If so, go to Step 2.
If not, go to Step 3.

2. Run the undo network-entity command (exercise caution when running this command) in the IS-IS view to delete the IS-IS area addresses, and then run the network-entity command in the IS-IS view to configure new IS-IS area addresses to ensure that there are not more than three different IS-IS area addresses in the Level-1 area that is connected to the Level-1-2 router. Run the display isis lsdb command to check whether the Level-1 area addresses are the same as the Level-2 area addresses in the LSPs with the fragment number being 0 on the local device.

If so, go to Step 4.
If not, go to Step 3.

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

4. End.