I have some questions about the subject. So i want to upgrade my software release 22.214.171.124 to 126.96.36.199. When i looked 188.8.131.52 release notes, there is a table for transition between softwares. As the table i can just upgrade software to 184.108.40.206 from 7.4.x, 7.6.x and 8.0.1.x. If i don't have these softwares, i can't upgrade my software directly to 220.127.116.11. I should upgrade my software to intermediate release. Which are the intermediate releases? And which one suitable for me? Could someone please share me which softwares should i use to reach 18.104.22.168 release?
The other question mark in my head is FUS? What is it? How can i check my FUS image version in my WLC? I read smth about that but it is not still clear.
Thanx for your replies. Then i will upgrade my FUS image with my ios. Is there any difference upgrade process between ios and fus? I have 2 WLC which are working in AP SSO mode. Is the same upgrade procedure that Cisco recommends for both the FUS and iOS as below?