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Alarm Handling

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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ISIS_1.3.6.1.3.37.2.0.6 isisMaxAreaAddressesMismatch

ISIS_1.3.6.1.3.37.2.0.6 isisMaxAreaAddressesMismatch

Description

ISIS/2/MAXAREA_MISMATCH:OID [oid] The MaxAreaAddress field of received PDU is different from local configuration. (sysInstance=[integer], sysInstanceofLevel=[integer], sysLevel=[integer], pduMaxAreaAddress=[integer], sysInstanceofPduMaxAreaAddress=[integer], circIndex=[integer], ifIndex=[integer], circIfIndex=[integer], pduFrag=[opaque], ifName=[string])

The maximum number of area addresses supported in the header of the received Level-1 PDU mismatched with that supported by the local switch.

Attribute

Alarm ID Alarm Severity Alarm Type

1.3.6.1.3.37.2.0.6

Major

other(1)

Parameters

Name Meaning

oid

Indicates the MIB object ID of the alarm.

sysInstance

Indicates the ID of the IS-IS process.

sysInstanceofLevel

Indicates the ID of the IS-IS process.

sysLevel

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

  • 2: Level-2

pduMaxAreaAddress

Indicates the maximum number of area addresses.

sysInstanceofPduMaxAreaAddress

Indicates the ID of the IS-IS process.

circIndex

Indicates the index of the interface.

ifIndex

Indicates the index of the interface.

circIfIndex

Indicates the IF index of the interface.

pduFrag

Indicates the fragment of 64-byte PDU header.

ifName

Indicates the name of the interface.

Impact on the System

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

2. If the trap is triggered because of the intercommunication failure between switch devices, neighbors cannot be established, and routes cannot be learnt from each other.

Possible Causes

1. The maximum number of area addresses supported by the local switch mismatch the number of area addresses supported by other switch devices.

2. The maximum area address field was modified.

Procedure

  1. Based on the IS-IS packet format defined in ISO10589, search for the pdu-fragment field (in hexadecimal) in the trap and fetch the system ID of the source switch. Then, find the value of the pdu-max-area field in the trap and check whether the number of maximum area addresses is neither 0 nor 3.

    • If so, go to Step 2.

    • If not, go to Step 3.

    Table 42-2  Methods of searching for system IDs and types of IS-IS packets

    Searching for the Packet Type

    Searching for the System ID

    Hello: the 5th byte in the pdu-fragment field being 0f, 10, or 11

    The system ID is continuous 6 bytes after the 10th byte in the pdu-fragment field

    LSP: the 5th byte in the pdu-fragment field being 12 or 14

    The system ID is continuous 6 bytes after the 13th byte in the pdu-fragment field

    SNP: the 5th byte in the pdu-fragment field being 18, 19, 1A, or 1B

    The system ID is continuous 6 bytes after the 11th byte in the pdu-fragment field

  2. Modify the maximum number of area addresses of the source switch to 3. Then, check whether the trap is cleared.

    • If so, go to Step 4.

    • If not, go to Step 3.

  3. Collect the trap information, log information, and configuration of the switch, and contact technical support personnel.
  4. End.

Related Information

None

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Updated: 2019-08-21

Document ID: EDOC1000142054

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