Need suggestion for WLC IOS upgrade.

[dinesh-sekar2]

Can we upgrade the WLC 9800 from IOS version 17.06.04 to IOS version Cupertino 17.9.3 directly ?

Current IOS version : 17.06.04

Upgraded IOS version: 17.09.03

WLC Model: C9800-L-C-K9.

Can we upgrade directly from 17.06.4 to 17.09.03 ?

And new IOS version 17.09.03 is compatible for model WAP C9130AXI-B ?

[marce1000]

  - The direct upgrade to the 17.9.3 is possible , have a  look at : https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/release-notes/rn-17-9-9800.html#Cisco_Concept.dita_59a2987f-2633-4630-8c7b-a8e8aecdeaf7

   As 17.9.x is now EOL too , consider https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214749-tac-recommended-ios-xe-builds-for-wirele.html
          Note that support for Wave1 APs is dropped after 17.14.x

   To check if your APs are compatible with a particular release use :
    https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html

   After a controller upgrade validate it's configuration again with the CLI command
   show tech wireless and feed the output from that into Wireless Config Analyzer
   Use the full command as mentioned in green , do not use show tech for this procedure,

 M.

     

[marce1000]

  - When you consider subsequent releases you may also find this interesting :
     https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214855-ios-xe-wireless-feature-list-per-release.html

    M.

[Leo Laohoo]

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@dinesh-sekar2 wrote:
Can we upgrade directly from 17.06.4 to 17.09.03 ?

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From one buggy version to an even buggier version.  

Direct upgrade to 17.9.X is doable.  Make sure to upgrade the ROMMON/CPLD first.

[Rich R]

Always refer to the release notes for the version you're upgrading to.
And refer to the TAC recommended version link below for TAC recommended code version(s).