topic Re: Embedded controller problems on 9120 ap in Wireless

Embedded controller problems on 9120 ap

MrMattias87 — Mon, 05 Jul 2021 19:58:10 GMT

So i tried installing a embedded controller on my 9120 accesspoint. Following each step from the guides...

After reboot i got:

APF4BD.9EBC.F140#capwap ap EWC-AP in Recovery Mode......

‌

Please use 'archive download-sw' to upgrade AP and Controller image

I follow this up with following command

archive download-sw ewc-ap tftp://192.168.128.7/C9800-AP-iosxe-wlc.bin

A tftp session starts but stops at 79 %.... I think i am running out of space but have problems knowing what i can safetly remove and find it hard to find right commands for doing it... Any nice tips?

Re: Embedded controller problems on 9120 ap

Mark Elsen — Mon, 04 Jan 2021 15:35:04 GMT

- Check the tftp server's logs (too) , including which type and 'model' of tftp server was used (?). Some tftp server's can not handle large files.

Re: Embedded controller problems on 9120 ap

MrMattias87 — Mon, 04 Jan 2021 18:46:59 GMT

I used the built-in tftp server in mac OS x but didnt find the log there so i tryed Solar Winds TFTP server now and get this in the log message:

Any idea why the peer stops responding?

Re: Embedded controller problems on 9120 ap

Mark Elsen — Tue, 05 Jan 2021 08:26:51 GMT

-Try to increase the timeout , in the Solarwinds TFTP server : File>Configure>TFTP Configuration set timeout from 3 to something larger then 10 seconds.

Re: Embedded controller problems on 9120 ap

MrMattias87 — Tue, 05 Jan 2021 19:11:35 GMT

Thank your for your help but still no luck... Same log in the tftp-server and in console session it stop around 77% followed på

curl: (71) Error

tranfer command failed (Error 71)

Any more idea?

Re: Embedded controller problems on 9120 ap

Mark Elsen — Wed, 06 Jan 2021 08:16:53 GMT

- Could you fallback to an FTP based transfer ? Syntax may look like this :

archive download-sw ewc-ap ftp://user:password@<IP address FTP server>/C9800-AP-iosxe-wlc.bin

Re: Embedded controller problems on 9120 ap

netlevelag — Wed, 10 Feb 2021 12:57:56 GMT

I am having the same problem. It stops at 77%

I found this: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt44832/?rfs=iqvred

How do I manually delete core files?

Re: Embedded controller problems on 9120 ap

yanfboy — Sun, 06 Jun 2021 04:17:25 GMT

have you fixed this issue and how?

I experience the same for my 9120AX AP as well.

Re: Embedded controller problems on 9120 ap

MrMattias87 — Sun, 06 Jun 2021 13:35:25 GMT

Nope, Sorry.

Re: Embedded controller problems on 9120 ap

yanfboy — Tue, 08 Jun 2021 14:33:49 GMT

Thank you all the same.

Re: Embedded controller problems on 9120 ap

msolorzano — Tue, 24 Aug 2021 21:30:35 GMT

did you get this issue resolved?

Re: Embedded controller problems on 9120 ap

anthony.watts — Thu, 27 Jul 2023 11:25:58 GMT

Had exactly the same issue and tried differnet tftp servers and timeouts, even played with the contents of the zip file removing unused ap files, and had it stop at diffferent load percentages but nothing worked, then I tried this.

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9120axi-access-point/217537-repairing-c9120-c9115-access-points-from.html

and repaired the AP from u-Boot option and then did the standard load of EWC.
AP now working fine.

Re: Embedded controller problems on 9120 ap

robert-lukens — Tue, 01 Jul 2025 21:09:24 GMT

@anthony.watts wrote:

Had exactly the same issue and tried differnet tftp servers and timeouts, even played with the contents of the zip file removing unused ap files, and had it stop at diffferent load percentages but nothing worked, then I tried this.

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9120axi-access-point/217537-repairing-c9120-c9115-access-points-from.html

and repaired the AP from u-Boot option and then did the standard load of EWC.
AP now working fine.

This worked for me. I wish that bug repair document indicated that TFTP transfer failures were a symptom of the bug, because I saw that before this post but didn't think it applied.