ISIS/3/REA_MAX_SEQ_NUM

Message

ISIS/3/REA_MAX_SEQ_NUM: The LSP sequence number almost reaches the maximum value. (isisSysInstance=[USHORT], isisSysLevelIndex=[USHORT], isisPduLspId=[STRING])

Description

The LSP sequence number reached the maximum value.

Parameters

Parameter Name	Parameter Meaning
isisSysInstance	ID of an IS-IS process
isisSysLevelIndex	IS-IS level
isisPduLspId	LSP ID

Possible Causes

Cause 1: The sequence numbers increase to the maximum value as expected.

Cause 2: An attacker simulated a locally generated LSP, set its sequence number to the maximum value, 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

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