Aironet C1140 - Radio Interface Keeps in Reset State

Unanswered Question
Sep 16th, 2010


Recently we noticed that one of our C1142 access points has a radio interface (actually is only happening with the one working in BG, so its dot11radio 0) which is entering in reset state and doesn't leave that state. I've seen an older thread about similar (or equal?) issue but was on a different AP model (C1240 if I remember correctly).

The radio interface controller information displays in the end a reset code:

Last radio reset code: 06
Radio resets - total:1 retries:0 failed:0
   Code/Count: 06/00001

Although I was not able to find any information about this reset code in Cisco documents (maybe someone knows where I find it?).

If I try to restart the interface via "shutdown" configuration command it doesn't fix the problem, the workaround that I know of is only by "reload"ing the whole accesspoint.

Of course while in reset state no client can associate to this interface....

Did anyone had similar problem? is there any documented BUG related to this?

Thanks for your time,

Jean-François Mousinho

PS: firmware version is 12.4(21a)JA1.

I have this problem too.
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Leo Laohoo Thu, 09/16/2010 - 15:25

Can you post the following output:

1.  sh version;

2.  sh inventory; and

3.  What country are you in?

jmousinho Fri, 09/17/2010 - 04:07

version information:

Cisco IOS Software, C1140 Software (C1140-K9W7-M), Version 12.4(21a)JA1, RELEASE SOFTWARE (fc1)
Technical Support:
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 16-Sep-09 18:09 by prod_rel_team

ROM: Bootstrap program is C1140 boot loader
BOOTLDR: C1140 Boot Loader (C1140-BOOT-M) Version 12.4(18a)JA3, RELEASE SOFTWARE (fc1)

TS_Piso8_SulEsq uptime is 3 days, 1 hour, 16 minutes
System returned to ROM by reload
System restarted at 10:47:38 Z Tue Sep 14 2010
System image file is "flash:/c1140-k9w7-mx.124-21a.JA1/c1140-k9w7-mx.124-21a.JA1"

This product contains cryptographic features and is subject to United...

cisco AIR-AP1142N-E-K9     (PowerPC405ex) processor (revision B0) with 98294K/32768K bytes of memory.
Processor board ID FCZ1426W04V
PowerPC405ex CPU at 586Mhz, revision number 0x147E
Last reset from reload
1 Gigabit Ethernet interface
2 802.11 Radio(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: C8:4C:75:AE:8A:CC
Part Number                          : 73-11451-08
PCA Assembly Number                  : 800-30554-06
PCA Revision Number                  : A0
PCB Serial Number                    : FOC14233KEB
Top Assembly Part Number             : 800-31273-04
Top Assembly Serial Number           : FCZ1426W04V
Top Revision Number                  : A0
Product/Model Number                 : AIR-AP1142N-E-K9   

Configuration register is 0xF

TS_Piso8_SulEsq#sh inventory
NAME: "AP1140", DESCR: "Cisco Aironet 1140 Series (IEEE 802.11n) Access Point"
PID: AIR-AP1142N-E-K9  , VID: V03, SN: FCZ1426W04V

Country is Portugal.

Thanks for your time.

Jean-François Mousinho

joseluciano Fri, 09/17/2010 - 13:54

If you have Power Injector.

You should put the following command on the AP, configure mode.

"Power inline negotiation injector installed"

By giving a "Show Running" you get something like this

"Power inline negotiation injector 0005.5fa0.cae1"

And the radio to give a "show ip interface brief" will be up.

I hope you serve.

jmousinho Fri, 09/24/2010 - 04:07

Hi Jose Luciano,

The CDP is off so that command doesn't work.

Bhaskar Dussa Wed, 10/29/2014 - 23:52

Thanks joseluciano


"Power inline negotiation injector installed" command worked for me

in my AP radios were showing to reset, after configuring this command issue has been resolved

& both the radios are working & up now......

thanks a lot........

Leo Laohoo Sun, 09/19/2010 - 02:06

Can't find anything wrong with your post.

Can you post the "sh logs" when the radios go into "Reset" state?


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