AIR-CAP1702I-E-K9 not joining WLC 2504 Controller

[MarkusStrauss4162]

Hello!

One of our customers has the following problem:

He has 2 WLC 2504 controllers and 14 APs connectet to them that work like a charm. Yesterday I wanted to add a new AIR-CAP1702I-E-K9 to the system. We are already using some of these APs so I thought it best to buy the same. I could not see any join-attempts on the controller side. I then noticed that the firmware on the AP was for standalone usage. I proceeded to download the lightweight ap firmware and flashed it. Now the LEDs indicate that it wants to join (green - orange - red) and I see some debug output. Still the AP does not join the controller and after some time it reboots. I logged the debug output according to a troubleshooting guide I found in the documentation. The logfile is attached.

Can you give me a hint on what to do?

[Leo Laohoo]

Post the complete output to the command "sh time".

[MarkusStrauss4162]

Hi, this is the output:

(Cisco Controller) >show time

Time............................................. Wed Feb 19 12:04:14 2020

Timezone delta................................... 0:0
Timezone location................................ (GMT +1:00) Amsterdam, Berlin, Rome, Vienna

NTP Servers
NTP Polling Interval......................... 86400

Index NTP Key Index NTP Server NTP Msg Auth Status
------- ----------------------------------------------------------------------------------
1 0 AUTH DISABLED

[marce1000]

 - Connect the  console  of  the AP; follow the boot process after a cold start and scrutinize it (preferably use an auto-logging setup). You will probably get additional and or useful info.

 M.

[Sandeep Choudhary]

can you console the AP and paste the complete bootup process here.

[MarkusStrauss4162]

do you have the correct settings for the serial connection at hand? i am going to try it tomorrow - will be using putty and a serial to usb adapter

thank you

[marce1000]

 - Normally it should be standard 9600b with xon/xoff , (do not do anything special to start with).

   M.

[MarkusStrauss4162]

Hi, please see logfile from serial output attached.

I guess the essential part is probably this one at the end:

*Feb 20 07:10:04.471: %CAPWAP-3-DHCP_RENEW: Could not discover WLC. Either IP address is not assigned or assigned IP is wrong. Renewing DHCP IP.

But that is somehow strange, because a few lines before it tries to connect to 192.168.16.240 which is the WLC

[Sandeep Choudhary · Accepted solution]

I know its not recommanded but still I would say to downgrade the AP software to ap3g2-k9w8-tar.153-3.JA4.tar

Here is the guide:

https://blog.it-playground.eu/lightweight-ap-manual-firmware-upgrade/

At the moment you are running ap3g2-k9w8-tar.153-3.JPI4.tar  which is equilent to 8.10.x or higher version

Regards

Dont forget to rate helpful posts

[MarkusStrauss4162]

You are my personal hero! Thank you so much!

[Leo Laohoo]

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@MarkusStrauss4162 wrote:

LWAPP image version 16.12.2.132

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I know the reason why.  This AP was recently joined to a 9800.  Jumping from IOS-XE to AeroOS is not going to work. 

Console into the AP and, in enable mode, issue the command "dir".