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I would like to upgrade wlc from 184.108.40.206 to 7.4. I would also like to keep my previous 50 licences.
I read somewhere that i should first upgrade to 7.0 to keep my previous licence (because if I go directly to 7.4 I will lose it).
Could I have a help?
You should read the release notes before upgrading:
But you will need to upgrade to an intermediate version:
"It is not possible to directly upgrade to the 220.127.116.11 release from a release that is older than 18.104.22.168."
Thank you for this clarification.
Please check the below link for Wireless LAN Controller Software Release Compatibility Matrix.
This link will be more helpful for you