Different Softwareversion between WLAN-Controller and APs

[maro86]

Hello,

my APs and my WLC have a different Softwareversion installed after upgrading from 17.9.5. to 17.12.4 with APSP.

My new WLC-SW-Version has 17.02.04 and my APs has 17.3.6, they are running together perfectly, except one AP C9136 that wont connect to the WLC (i thing because of 17.3.6?). Usually all Access-Points should have the same Software Version like the WLC. So whats wrong here?

So what did i do?

1. Updating the Controller with no ISSU from 17.9.5 to 17.12.04 was working good. WLC and AP had the same SW-Version.

2. After successfully updating all devices, i tried to install the APSP C9800-universalk9_wlc.17.12.04.CSCwm71871.SPA.apsp.bin

While this APSP upgrade, the WLC shows, that there is some "improper file" and what kind of "Improper file"

Please take care of my screenshot, all files related to 17.3.6 has been declared as "improper file"

He did it 3 times and i just only uploaded this file to both WLC to bootflash. I didnt installed that files, only uploaded to both WLCs.

After that, my insallaton progress was going further without more "improper files" but then i saw something strange.

 

I choose the right bin file to install  the APSP-Software but instead of download to something like 17.02.04.xx they downloaded 17.03.06 and rebooted successfully.

So whats wrong here? It doesnt matter what i do, no chance to get in sync regarding the software image versiion between WLC and APs. When these APs connect to a completely different WLC with 17.12.04 installed, they swap there image and running good. When i send them back to his "home-wlc" they swap the version back to 17.03.06.

So can anybody tell me, what did i wrong here?

WLC is an C9800-40 and APs are mixed from 2702,2802,9120 and one 9136i

Thanks to everyone here

 

[maro86 · Accepted solution]

Hello Everybody,

finally i got the solution from Cisco TAC and i had last week the chance to check the solution.

It was like Rich R said before, i had to clear the install database 

Here the following steps, for my solution

*   Remove the installed packages from the controller, use the following commands:

#configure terminal
#service internal
#clear install state (this will require a reload of the controller automatically)

  *   Once the controller has reloaded, the access points will have the base 17.12.4 image without the AP service packs. ( In my Case they need to download this software, that was not in Backup image )

  *   You can install the service pack and let it be pushed to the access points.

Thanks to everyone here and i hope this topic will help more people in future

Best regards

Martin