Downgrade ios from 8.5.151 to 8.3.150 or upgrade 8.3.122 to 8.3.150

[promero]

Team,

I want to implement a second WLC but for AP infrastructure reasons I cannot go beyond version 8.3.150 and it happens that this second WLC is with version 8.5.151 but when performing a downgrade it gives me an error of "TFTP code file type not supported "the same thing happens if I want to start it with the secondary image which is 8.3.122.

Has someone this happened to him or is there another process to download the image?

WLC 5508.

Error: TFTP code file type not supported

[Leo Laohoo]

What is the complete filename of the 8.3.X.X firmware?

[promero]

Hi Leo,

The name of the file to upload is AIR-CT5500-K9-8-3-150-0.aes

[Leo Laohoo]

---

@promero wrote:

The name of the file to upload is AIR-CT5500-K9-8-3-150-0.aes

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CLI into the controller and post the complete output to the command "transfer download start" and respond with a "n".

[promero]

(Cisco Controller) >show sysinfo

Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.3.122.0 ---> Backup image

(Cisco Controller) >transfer download datatype code
(Cisco Controller) >transfer download mode tftp
(Cisco Controller) >transfer download serverip 20.20.20.10
(Cisco Controller) >transfer download path .
(Cisco Controller) >transfer download filename AIR-CT5500-K9-8-3-150-0.aes
(Cisco Controller) >transfer download start

Mode............................................. TFTP
Data Type........................................ Code
TFTP Server IP................................... 20.20.20.10
TFTP Packet Timeout.............................. 6
TFTP Max Retries................................. 10
TFTP Path........................................ ./
TFTP Filename.................................... AIR-CT5500-K9-8-3-150-0.aes

This may take some time.
Are you sure you want to start? (y/N) n

Transfer Canceled

[patoberli]

I tend to say that the file you are trying to install is corrupted. Please check the MD5 sum of it and compare it with the Cisco download portal value (hover over the filename to see the MD5 sum). 

[promero]

Hello, check and the comparison of the md5 of the downloaded file with that of the cisco portal is fine.

[promero · Accepted solution]

I just took the WLC to a factory reset, I started it with the 8.3.122 image and repeated the upgrade process which now turned out to be successful.

Thanks for the support and feedback.