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Alarm Handling

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document provides the explanations, causes, and recommended actions of alarms on the product.
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ISIS_1.3.6.1.3.37.2.0.4 isisAttemptToExceedMaxSequence

ISIS_1.3.6.1.3.37.2.0.4 isisAttemptToExceedMaxSequence

Description

The LSP sequence number has reached the maximum value. (SysInstance=[SysInstance], SysLevel=[SysLevel], LspId=[LspId])

The sequence number of an LSP approached the maximum value.

Attributes

Attribute

Description

Alarm or Event

Alarm

Trap Severity

Alert

Mnemonic Code

isisAttemptToExceedMaxSequence

Trap OID

1.3.6.1.3.37.2.0.4

Alarm ID

0x00F10096

Alarm Type

communicationsAlarm

Raise or Clear

Raise

Match trap

ISIS_1.3.6.1.4.1.2011.5.25.24.2.4.16 hwIsisAttemptToExceedMaxSequenceClear

Parameters

Parameter Description

isisSysInstance

Indicates the ID of the IS-IS process.

isisSysLevelIndex

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

  • 2: Level-2

isisPduLspId

LSP ID.

VB

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;

1.3.6.1.3.37.1.10.1.1.1

isisPduLspId

isisSysInstance;

Impact on the System

After the sequence number reaches the maximum value 0xFFFFFFFF, the IS-IS process will be suspended for 20 minutes, namely, the sum of the maximum lifetime and zero aging time of an LSP. As a result, IS-IS services will be interrupted.

Possible Causes

The sequence number of the LSP generated locally reached the maximum value 0xFFFFFFFF.

Procedure

  1. After the LSP whose sequence number is 0xFFFFFFFF (the maximum lifetime of an LSP + 60, of which, the default maximum lifetime of an LSP is 1200s) ages out, the sequence number of the LSP starts from 1 again. The display isis lsdb local command can be used to check the Seq Num field of an LSP generated by the local .

    • If the increasing speed of the LSP sequence number is matched with the configured refreshing period, it indicates that this trap message is informational only, and no action is required, go to Step 5.

    • If the sequence number increases rapidly, go to Step 2.

  2. Check whether there is another whose system ID is the same as the system ID or the virtual system ID of the local . According to ISO10589, the system ID in an IS-IS domain must be unique.

    • If so, go to Step 3.

    • If not, go to Step 4.

  3. (Use the undo network-entity command or the undo virtual-system command with caution.) Enter the IS-IS view of the local or another whose system ID is the same as the system ID or the virtual system ID of the local . Then run the undo network-entity command or the undo virtual-system command to delete the repeated system ID or virtual system ID and the network-entity command or the virtual-system command to configure a different system ID or virtual system ID for the . Check whether the trap is cleared.

    • If so, go to Step 5.

    • If not, go to Step 4.

  4. Collect the trap information, log information, and configuration of the , and contact technical support personnel technical personnel.
  5. End.
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Updated: 2019-04-02

Document ID: EDOC1100074754

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