2911 router crashes after deactivating night service

Unanswered Question
May 4th, 2012

The router sometime crashes when it change over from day service to night service. After resetting the router, it works fine.

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Overall Rating: 5 (2 ratings)
maislam76 Fri, 05/04/2012 - 17:21

C2900 universal k9 m

15.0 (1)m6

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Luis Gustavo Al... Fri, 05/04/2012 - 18:03

How ahead and attach both. What we need to find out, is if this is a high CPU or a truly hang where the process runs infinitely and does not relinguish the processor.

Do you still have console access when the router hangs?

If you do then go ahead and do the following:


# term mon

# conf t

# logg mon

# logg con

# no log buff

1. Have a console cable connected to the router and log the output to a txt file.

2. Deactivate the service

3. Collect everything from start to finish till the router comes back.

If the router crashes, then we can collect the following info to find out:


If the router hangs then we can collect stack traces from rommon by following this link:


- Luis A.

maislam76 Sat, 05/05/2012 - 02:18

after crashing I can console in, but no remote log in.

I have taken sh tech after it crashed

maislam76 Sat, 05/05/2012 - 03:03

Hi Luis,

I forgot to say, when it crashes the users can't use the computer or phones.

Thank you for pointing me to right direction.


Paolo Bevilacqua Sat, 05/05/2012 - 04:13

Please update to 15.0(1)M8 or 15.1(4)M4.

Then if still happens you need to contact the TAC, because no forum can resolve IOS bugs.

maislam76 Sat, 05/05/2012 - 04:53

Thank you guys, I will update the IOS, if not resolved then TAC case.

Luis Gustavo Al... Sat, 05/05/2012 - 07:34

Paolo is right trying with the IOS upgrade first.

Thanks for the rating.

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