12-19-2024 03:36 AM - edited 12-19-2024 07:45 AM
hi Team,
is there any way to restart isis process in IOS ?
i have tried to clear the clns neighbor but no luck .
ISIS sequence number has been reached maximum "0xFFFFFFFF"
Router-1#show processes cpu sorted
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
352 3982241876 811511454 4907 99.03% 98.87% 98.62% 0 ISIS Upd dcn
90 23318692 209210093 111 0.16% 0.11% 0.10% 0 Per-Second Job
Router-1#show version
Cisco IOS Software, C2951 Software (C2951-UNIVERSALK9-M), Version 15.4(3)M5, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Tue 09-Feb-16 05:48 by prod_rel_team
Router-1#show isi database Router-1.2B-00 verbose
Tag dcn:
IS-IS Level-1 LSP Router-1.2B-00
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
Router-1.2B-00 * 0xFFFFFFFF 0x6443 0 0/0/0
Metric: 0 IS Router-1.00
Metric: 0 ES 0000.0020.6883
IS-IS Level-2 LSP Router-1.2B-00
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
Router-1.2B-00 * 0x00000000 0x0000 0 0/0/0
Router-1#
Dec 19 16:32:31.102: %CLNS-4-LSP_MAXSEQ: ISIS: attempt to exceed LSP maximum sequence number for LSP Router-1.2B-00
Dec 19 16:33:01.103: %CLNS-4-LSP_MAXSEQ: ISIS: attempt to exceed LSP maximum sequence number for LSP Router-1.2B-00
Dec 19 16:33:31.103: %CLNS-4-LSP_MAXSEQ: ISIS: attempt to exceed LSP maximum sequence number for LSP Router-1.2B-00
Dec 19 16:34:01.103: %CLNS-4-LSP_MAXSEQ: ISIS: attempt to exceed LSP maximum sequence number for LSP Router-1.2B-00
BR://
SK
12-19-2024 03:53 AM
12-19-2024 07:06 AM
Hi Flavio ,
i have already tried but no luck
BR://
SK
12-19-2024 04:19 AM
Hello @Sunil_06
You can try the following to reset IS-IS neighbors and databases:
clear isis *
clear clns neighbor
This may help refresh the IS-IS state without restarting the entire process.
From my point of view, the issue arises because the IS-IS LSP sequence number reached the maximum value (0xFFFFFFFF). To prevent this you can reduce the LSP generation frequency using the times lsp command. Also, ensure there are no network or configuration issues causing excessive LSP flooding...
If the CPU remains high after resetting the IS-IS process, further investigation into your configuration and network topology may be required.
12-19-2024 07:06 AM
Both commands i have tried but still its showing same
12-19-2024 07:10 AM - edited 12-19-2024 10:40 PM
no fluctuation showing in LSP/SPF logs
Router-1#show isis lsp
Tag dcn:
Level 1 LSP log
When Count Interface Triggers
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 3 GigabitEthernet0/2.46 DELADJ DIS
4y41w 2 GigabitEthernet0/2.30 DELADJ DIS
4y41w 2 GigabitEthernet0/2.30 NEWADJ DIS
4y41w 2 GigabitEthernet0/2.98 DELADJ DIS
4y41w 2 GigabitEthernet0/2.98 NEWADJ DIS
4y41w 2 GigabitEthernet0/2.98 DELADJ DIS
4y41w 2 GigabitEthernet0/2.98 NEWADJ DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 2 GigabitEthernet0/2.30 DELADJ DIS
4y41w 4 GigabitEthernet0/2.30 NEWADJ DELADJ DIS
4y41w 2 GigabitEthernet0/2.98 NEWADJ DIS
4y41w 2 GigabitEthernet0/2.98 DELADJ DIS
4y41w 2 GigabitEthernet0/2.98 NEWADJ DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 12 GigabitEthernet0/2.98 NEWADJ DELADJ DIS
(pending) 255912 GigabitEthernet0/2.98 CLEAR IFDOWN NEWADJ DELADJ DELADJ DIS ES
Level 2 LSP log
When Count Interface Triggers
4y41w 2 GigabitEthernet0/2.30 NEWADJ DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.30 DELADJ
4y41w 2 GigabitEthernet0/2.30 NEWADJ DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.98 DIS
4y41w 1 GigabitEthernet0/2.30 DELADJ
4y41w 2 GigabitEthernet0/2.30 NEWADJ DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DIS
4y41w 1 GigabitEthernet0/2.30 DELADJ
4y41w 2 GigabitEthernet0/2.30 NEWADJ DIS
4y41w 12 GigabitEthernet0/2.98 NEWADJ DELADJ DIS
(pending) 162457 GigabitEthernet0/2.30 CLEAR IFDOWN NEWADJ DELADJ DELADJ DIS
Router-1#
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