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Log Reference

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document provides the explanations, causes, and recommended actions of logs on the product.
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ISIS/3/ISIS_AREA_MISMATCH

ISIS/3/ISIS_AREA_MISMATCH

Message

ISIS/3/ISIS_AREA_MISMATCH: 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])

Description

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

Parameters

Parameter Name Parameter Meaning

[isisSysInstance]

ID of an IS-IS process

[isisSysLevelIndex]

IS-IS level

[isisCircIndex]

Circuit index of an interface

[isisCircIfIndex]

Circuit IfIndex of an interface

[isisPduFragment]

64-byte PDU header

[ifIndex]

IfIndex of an interface

[IfName]

Interface name

Possible Causes

Cause 1: The configuration was incorrect.

2: The area address field was rewritten.

Procedure

  1. Based on the IS-IS packet format defined in ISO10589, check the isisPduFragment field (in hexadecimal) and obtain the system ID of the source . Run the display this command in the IS-IS view of the source to check whether the source is configured with an area address the same as that of the local .

    • If the source and the local have the same area address, go to Step 3.

    • If the source and the local have different area addresses, go to Step 2.

    Table 47-1  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 [isisPduFragment] field is 0f, 10, or 11.

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

    LSP: An LSP is identified when the 5th byte in the [isisPduFragment] field is 12 or 14.

    The six consecutive bytes beginning with the 13th byte in the [isisPduFragment] field constitute a System ID.

    SNP: An SNP is identified when the 5th byte in the [isisPduFragment] field is 18, 19, 20, or 21.

    The six consecutive bytes beginning with the 11th byte in the [isisPduFragment] field constitute a System ID.

  2. Run the network-entity command in the IS-IS view of the source to configure an IS-IS area address the same as that of the local . Exercise caution when using the undo network-entity command. Then, check whether the fault is rectified.

    • If the fault rectified, go to Step 4.

    • If the fault persists, go to Step 3.

  3. Contact technical support personnel technical support personnel.
  4. End.
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Updated: 2019-04-20

Document ID: EDOC1100039602

Views: 119137

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