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Alarm Handling

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
ISIS-STD_1.3.6.1.2.1.138.0.11 isisVersionSkew

ISIS-STD_1.3.6.1.2.1.138.0.11 isisVersionSkew

Description

ISIS-STD/2/VERSION_SKEW:OID [oid] IS-IS received a PDU with incorrect ProtocolVersion. (NotificationSysLevelIndex=[integer], CircIfIndex=[integer], PduProtocolVersion=[integer], PduFragment=[opaque])

IS-IS received a PDU carrying an incorrect protocol version number.

Attribute

Alarm ID Alarm Severity Alarm Type

1.3.6.1.2.1.138.0.11

Major

environmentalAlarm(6)

Parameters

Name Meaning

oid

Indicates the MIB object ID of the alarm.

NotificationSysLevelIndex

IS-IS level of a device that sends the trap

CircIfIndex

Interface index

PduProtocolVersion

Protocol version contained in a PDU

PduFragment

64-byte PDU header

Impact on the System

1. If the board modifies the packet, route flapping may occur, and the CPU usage will increase.

2. If the trap was triggered by a device communication failure, neighbor relationships could not be established, and routes could not be learned from each other.

Possible Causes

Cause 1: The IS-IS version numbers supported by the local router and other router devices were inconsistent.

Cause 2: The version number field was modified during packet transmission.

Procedure

  1. Based on the IS-IS packet format defined in ISO10589, obtain the pdu-fragment field (in hexadecimal) in the trap and the system ID of the source router. Check whether the version field value on the source router is 1

    • If the version field value is 1, go to Step 4.

    • If the version field value is not 1, go to Step 2.

    Table 39-11  Methods of identifying system IDs and types of IS-IS packets

    Identifying the Packet Type

    Identifying the System ID

    Hello: A Hello packet is identified when the 5th byte in the pdu-fragment field is 0f, 10, or 11.

    The six consecutive bytes beginning with the 10th byte in the PduFragment field constitute a System ID.

    LSP: An LSP is identified when the 5th byte in the pdu-fragment field is 12 or 14.

    The six consecutive bytes beginning with the 13th byte in the pdu-fragment field constitute a System ID.

    SNP: An SNP is identified when the 5th byte in the pdu-fragment field is 18, 19, 1A, or 1B.

    The six consecutive bytes beginning with the 11th byte in the pdu-fragment field constitute a System ID.

  2. Check whether the IS-IS version number on the source router can be changed.

    • If the IS-IS version number can be changed, go to Step 3.

    • If the IS-IS version number cannot be changed, go to Step 4.

  3. Change the IS-IS version number of the source router (the IS-IS version number cannot be changed on the Huawei router). Then check whether the trap is cleared.

    • If the trap is cleared, go to Step 5.

    • If the trap is not cleared, go to Step 4.

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

Related Information

None

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Updated: 2019-08-12

Document ID: EDOC1100034065

Views: 138319

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