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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/5/ISIS_LSP_SEQ_THRESHOLD_EXCEED

ISIS/5/ISIS_LSP_SEQ_THRESHOLD_EXCEED

Message

ISIS/5/ISIS_LSP_SEQ_THRESHOLD_EXCEED: The LSP sequence number has exceeded the upper threshold value. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisPduLspId=[isisPduLspId], srcMac=[srcMac], recvFromIf=[ifName], thresholdValue=0x[thresholdValue])

Description

The LSP sequence number exceeded the upper alarm threshold.

Parameters

Parameter Name Parameter Meaning

isisSysInstance

ID of an IS-IS process

isisSysLevelIndex

IS-IS level

isisPduLspId

LSP ID

srcMac

Source MAC address of the received LSP

recvFromIf

Name of the interface that received the LSP

thresholdValue

Upper alarm threshold

Possible Causes

Cause 1: An attacker simulated a locally generated LSP, set its sequence number to a value that is greater than the upper alarm threshold, and sent the LSP to the local device.

Cause 2: Another device on the network had the same IS-IS System ID as the local one.

Procedure

  1. Run the display isis lsdb command to check the sequence numbers of locally generated LSPs.

    • If the sequence numbers increase as expected, no action is required.
    • If the sequence numbers increase too fast, go to Step 2.

  2. Run the timer lsp-refresh command in the IS-IS view to increase the LSP update interval and then run the display isis lsdb command to check the sequence numbers of locally generated LSPs.

    • If the sequence numbers increase as expected, go to Step 5.
    • If the sequence numbers increase too fast, go to Step 3.

  3. Check whether there is another device on the network with the local IS-IS System ID.

    • If such a device exists, change its system ID.
    • If no such a device exists, go to Step 4.

  4. Collect the relevant information and contact technical support personnel technical support personnel.
  5. End.
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Updated: 2019-04-20

Document ID: EDOC1100039602

Views: 121749

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