Cisco 4321 sudden restart

[salomidhogela]

Good Day All,

I am experiencing issues with my Cisco 4321 router which keeps restarting,

ISO isr4300-universalk9.17.03.05.SPA.bin. 

Please advise on the possible causes of this.

Regards,

[pman]

Hi,

look at the output of the

show version

 command.

The reason for the last reload should appear there

also Try working according to the following link:

https://www.cisco.com/c/en/us/support/docs/universal-gateways-access-servers/90-series-customer-premises-equipment/7900-crashes-router-troubleshooting.html

for 17.03.05 version There are a number of known bugs that cause crashes
You can see the bugs at the bottom of the attached link:

https://www.cisco.com/c/en/us/td/docs/routers/access/4400/release/xe-17-3/isr4k-rel-notes-xe-17-3.html

[Flavio Miranda]

Hi

  It is difficult to recommend anything only with the information that the router is restarting. It can be power supply problem, can be a hardware problem, can be routing table problem. Do you have BGP on this router? how many routes to you receive?

How about CPU and memory?  What do you see in

show log ?

[salomidhogela]

Yes I have BGP configured, I have BGP on my other router but it's stable no restart. The CPU is fine

CPU utilization for five seconds: 3%/0%; one minute: 2%; five minutes: 1%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

See below logs

Log Buffer (16000 bytes):
01:31:44.374 NAM: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF
*Jun 23 01:31:44.406 NAM: %SYS-5-RESTART: System restarted --
Cisco IOS Software [Amsterdam], ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 17.3.5, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2022 by Cisco Systems, Inc.
Compiled Wed 09-Feb-22 10:37 by mcpre




Show ver

Uptime for this control processor is 9 hours, 24 minutes
System returned to ROM by PowerOn at 15:19:32 NAM Fri Jun 10 2022
System restarted at 01:31:02 NAM Thu Jun 23 2022
System image file is "flash:isr4300-universalk9.17.03.05.SPA.bin"
Last reload reason: PowerOn

[Leo Laohoo]

---

@salomidhogela wrote:

System returned to ROM by PowerOn at 15:19:32 NAM Fri Jun 10 2022
Last reload reason: PowerOn

---

Post the complete output to the following commands: 

• dir flash:core

• sh log on uptime

[salomidhogela]

uptime is 9 hours, 39 minutes
Uptime for this control processor is 9 hours, 40 minutes
System returned to ROM by PowerOn at 15:19:32 NAM Fri Jun 10 2022
System restarted at 01:31:03 NAM Thu Jun 23 2022
System image file is "flash:isr4300-universalk9.17.03.05.SPA.bin"
Last reload reason: PowerOn


dir flash:core
Directory of bootflash:/core/

16066 -rw- 1 Jun 23 2022 11:01:46 +02:00 .callhome
24097 drwx 4096 Apr 18 2022 08:23:28 +02:00 modules

3258179584 bytes total (1063174144 bytes free)

[Flavio Miranda]

Last reload reason: PowerOn

Are you facing power outage on this location?  

[salomidhogela]

There's no power issue onsite, I have other devices (Cisco 4321 router) connected to the same power feed but the uptime is 100%.

[Leo Laohoo]

Post the complete output to the command

sh log on uptime.

[salomidhogela]

show log on uptime
Slot Reset reason Power On
-----------------------------------------------------------------
R0 reset power on 06/23/22 01:30:32
R0 reset power on 06/22/22 13:21:34
R0 reset power on 06/22/22 10:51:39
R0 reset power on 06/22/22 09:30:47
R0 reset power on 06/22/22 06:15:55
R0 reset power on 06/22/22 06:01:23
R0 reset power on 06/22/22 05:32:31
R0 reset power on 06/22/22 03:21:54
R0 reset power on 06/19/22 07:40:24
R0 reset power on 06/18/22 06:32:53
R0 reset power on 06/13/22 01:10:42
R0 reset power on 06/12/22 23:10:35
R0 reset power on 06/10/22 15:43:25
R0 reset local software 06/10/22 15:22:13
R0 reset local software 06/10/22 15:03:07
R0 reset power on 06/10/22 14:28:43
R0 reset local software 06/10/22 13:48:01
R0 reset power on 06/10/22 12:36:56
R0 reset power on 05/18/22 16:17:49
R0 reset local software 04/18/22 08:23:16
R0 reset local software 04/18/22 08:03:31

[Leo Laohoo]

---

@salomidhogela wrote:

R0 reset power on 06/23/22 01:30:32
R0 reset power on 06/22/22 13:21:34
R0 reset power on 06/22/22 10:51:39
R0 reset power on 06/22/22 09:30:47

---

If this was a crash, the output would say, at a minimum

reset local software.

  But this is

reset power on

and this points to either a faulty power outlet or a faulty power supply.  

Does the router have dual power supplies?

[salomidhogela]

No, It doesn't have a dual power supply. I have in the meantime logged a
call with TAC.

[Leo Laohoo]

---

@salomidhogela wrote:
No, It doesn't have a dual power supply. 

---

Get dual power supplies or get the power supply replaced. 

---

@salomidhogela wrote:
I have in the meantime logged a call with TAC.

---

I wish thee the best of luck.

[salomidhogela]

Hi Leo,

The seems to be a hardware issue, I have replaced the router and it never rebooted again.

Regards,

Salom

[paul driver]

I guess it wouldn’t reboot again as its a totally different rtr! - Did you try to add an additional PSU/ or replace the existing one  as @Leo Laohoo suggested?