Now the time has come. 221C did not work anymore on FortiOS7. Very bad. Have here 5 AP's, all Offline.
Can't this for 7.0.
By default, when upgrading to FortiOS 7.0, the 221C's don't work with Fortigate since strong cryptographic ciphers are enforced (had the same problem myself), and the "C" series ("legacy") don't support these ciphers. (It is also in the release notes)
In order to get the older AP's to work with a workaround, you need to configure the following:
[strike]config system global [/strike]
[strike]set ssl-static-key-ciphers enable [/strike]
[strike]set strong-crypto disable [/strike]
Since FortiOS 7.0.1 you can only enable the weak ciphers for the connectivity between the Fortigate and the FortiAP's
config wireless-controller global
set tunnel-mode compatible
After changing these setting you should see that the FAP's are connecting to the Fortigate once again.