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Log Reference

S9300, S9300E, and S9300X V200R010C00

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=[USHORT], isisSysLevelIndex=[USHORT], isisPduLspId=[STRING], srcMac=[STRING], recvFromIf=[STRING], thresholdValue=[STRING], LocalSeqNum=[STRING], RemoteSeqNum=[STRING])

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, which is 0xF0000000.

LocalSeqNum

Local sequence number

RemoteSeqNum

Remote sequence number

Possible Causes

Cause 1: The sequence numbers increase to the upper alarm threshold as expected.

Cause 2: 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 3: 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 alarm information and configuration information, and then contact technical support personnel.
  5. End.
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Updated: 2019-08-21

Document ID: EDOC1000142069

Views: 547831

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