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I have a question again..

Soon Kwan Kwon
Level 1
Level 1

I have WS-SUP720-3B.

When I turned it on, it was continuously entered ROMmon mode.

1. So I input command "dir bootflash:" . And there is a sup720 IOS.

2. And I was manually inputting "boot".

3. It was entry privileged mode.

4. And I did commands "boot system flash sup-bootdisk: IOS name" and "write memory". (Also sup-bootflash: )

5. reload.... but it was entry ROMmon mode again.

 

Hooo..

 

Why it was entry ROMMON mode continuously?

Please teach me ㅠ_ㅠ

Regards,

29 Replies 29

Thank you for your help!..

 

But I don't understand your opinion..

TAC... bcos.. I don't know its word.

 

then, what should I do now?;

You need to open a cisco support case, and then Technical Assistance Center (TAC) will help you to analyse and decode the logs. Use below link for opening a service request.

https://tools.cisco.com/ServiceRequestTool/scm/mgmt/case

 

 

Sorry to bothering you..

As you referred url, I clicked it, but below photo situation appeared.

because I have no partnership with cisco.

Have you purchased cisco support (SMARTnet) for your device ?

  • If Yes, then need to associate "contract number" of the support service with you cisco ID, then only you will be able to open a support case.
  • If No, then can't open support case.

My answer is No..

hmm...

Ok... thank you so much! ..even though you may night time?...ㅠㅠ

I'll search another method about its problem.

Have a nice day viviek srivastava!

Do a "show tech"

and upload the results, please.

 

 

 

 

OKOK!!

wait a minute plz

Ah...

I tried "show tech-support" but it was not performed to the end... because it was automatically rebooting.. that is loop-booting situation.

 

...I don't know what can I do.

Sorry to bothering you.

ㅠㅠmaybe is there another method ?...

I was checking the logs which you have provided. If you have maintanence window then try to remove power-supply2 and run the system on only single power-supply. I'm asking bcos of below log:

00:01:11: %C6KPWR-SP-4-PSREDUNDANTMISMATCH: power supplies rated outputs do not match.
 

 

Other thing is that, some logs shows hardware issue as well, details given below:

Your log (twice):

00:01:10: %C6KERRDETECT-SP-2-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds

00:01:10: %C6KERRDETECT-SP-2-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds
 

Similer Cisco's debug:

%C6KERRDETECT-SP-4-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds

Problem

The switch reports these error messages:

  • %C6KERRDETECT-SP-4-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds

  • %C6KERRDETECT-SP-4-SWBUSSTALL_RECOVERED: The switching bus stall is recovered and data traffic switching continues

Description

The %C6KERRDETECT-SP-4-SWBUSSTALL message indicates the switching bus is stalled and data traffic is lost.

The %C6KERRDETECT-SP-4-SWBUSSTALL_RECOVERED message indicates that the switching bus is no longer stalled, and data traffic can continue.

Basically, if any one module on the system bus hangs then the supervisor detects a timeout and tries to recover on its own. If a module was in the process of being installed then that is a very possible cause of these messages since this can cause a bus stall while the module gets seated into the backplane.

 

 

I really appreciate all the trouble you've gone through!

I don't know you help me continuously...

 

As you advice that, I did. but I couldn't  solve my problem.

 

By the way, I saw the below photo sentence. (Min. SP ROMMON: 8.4(2) )

What is the meaning??

 

Instead of this SP, I changed to another one. 

After that, there is no loop-booting...

I think below photo SP is fault?...

 

Maybe you know?

This is something which we overlooked in the "sh ver" output. Happy to know that you resolved it.

 

Also error logs indicates same thing:

00:01:10: %C6KERRDETECT-SP-2-SWBUSSTALL: The switching bus is experiencing stall for 3 seconds

Ah,.....correct..ㅠㅠ

 

I really thank for your help.

 

vivek srivastava, CHARLES HILL

 

I resolved its problem thanks to you.

Thank you so much again ^^

Have a nice day!

Glad you got it resolved.

Thank you for the update.

^^ God bless you.

To get to the end of the show tech support quicker, enter

config t

terminal length 0

exit

show tech.

 

I would also send the output to a file instead of copying and pasting the show tech.

 

to change terminal length back to the default enter

config t

terminal length 24

exit

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