Errors on 3550 Cisco Switch

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May 20th, 2008
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I am seeing couple of these error messages in the log, Could some one help me what are those and what do i have to do next:-


May 16 09:46:12: unknown AAA/DISC/EXT: 1020/"User Request"

May 16 09:46:12: unknown AAA/DISC: 9/"NAS Error"

May 16 09:46:12: unknown AAA/DISC/EXT: 1002/"Unknown"

May 16 10:00:59: unknown AAA/DISC: 1/"User Request"

Thanks in advance.

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gpulos Tue, 05/20/2008 - 03:35
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This looks like an AAA problem.

(authentication, authorization and accounting)

An AAA connection was disconnected and the number identifies the 'cause code' of the disconnect.

1 = user request

1002 = unknown


If this is a system automatically connecting for auditing, etc. you may have a configuration problem with user/password.

Also, check the NAS configuration for problems.

Please see the following link for more info:

Sarasaqlain Tue, 05/20/2008 - 03:39
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Hi Pulos,

Thanks for the immediate response.

Actually i had HSRP issue with my 2 switches there was physical cable disconnected and i had changed the cable and everything came up after which i saw lot of these type of messages in the log. So Can you tell me these message could be due to that or is this different.


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