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Alarm Handling

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the trap description, attributes, parameters, impact on the system, possible causes, procedures, and references. This document provides a complete set of traps, through which intended readers are kept of the running status of the device so as to locate faults.

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ISIS_1. isisManualAddressDrops

ISIS_1. isisManualAddressDrops


ISIS/2/MANAREA_DROP:OID [oid] Some area addresses were discarded because the number of area addresses exceeded three. (sysInstance=[process-id], sysInstanceofLevel=[process-id], sysLevel=[level], sysInstanceofManAreaAddrExistState=[process-id], manAreaAddr=[area-address], manAreaAddrExistState=[area-address-state])

On the Level-1-2 router, IS-IS leaked the Level-1 area addresses to the Level-2 area. As a result, the number of Level-2 area addresses was more than 3 and IS-IS selected the top three smallest area addresses as the Level-2 area addresses. This may lead to the loss of Level-2 area addresses of the local IS-IS system.


Alarm ID Alarm Severity Alarm Type




Name Meaning


Indicates the MIB object ID of the alarm.


Indicates the ID of the IS-IS process.


Indicates the ID of the IS-IS process.


Indicates the IS-IS level:
  • 1: Level-1

  • 2: Level-2


Indicates the ID of the IS-IS process.


Indicates the area address. If the value is 0, it indicates the parameter is not used.


Indicates the area address state:
  • 1: active

  • 2: notInService

  • 3: notReady

  • 4: createAndGo

  • 5: createAndWait

  • 6: destroy

Impact on the System

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

Possible Causes

On the Level-1-2 router, IS-IS leaked the Level-1 area addresses to the Level-2 area. When the number of Level-2 area addresses exceeded 3, IS-IS selected top three smallest area addresses. Then, the local area addresses in the Level-2 area may be lost.


  1. Run the display isis lsdb level-1 verbose command to check the detailed information about the Level-1 IS-IS LSDB, and the AREA ADDR field carried in the LSP with the LSP fragment ID being 0. Then, count the number of different Level-1 area addresses to check whether the number is larger than three.

    • If so, go to step 2.
    • If not, go to step 3.

  2. Run the display isis lsdb { level-1 | level-2 } verbose command to check whether the value of the Level-1 Area Address field is the same as the value of the Level-2 Area Address field in the LSP with the fragment number being 0 on the local router.
  3. Collect the trap information, log information, and configuration of the router, and contact technical support personnel.
  4. End.

Related Information


Updated: 2019-03-06

Document ID: EDOC1100041475

Views: 106834

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