Delete a VS profile and replace it with another by TMSH

You cannot replace a FastL4 profile with an SSL profile as the two are not comparable. FastL4 is a protocol profile that defines how it will handle TCP traffic.

An SSL profile (either client or server) specifies the SSL certificate and settings used for both client and server connections. If a virtual server is configured for a FastL4 profile you cannot apply an SSL profile, as the name suggests, this puts the virtual server in a layer 4 mode, whereas SSL sits at a higher OSI level.

Please see https://support.f5.com/csp/article/K55185917 for further reading.

If you want to use an SSL profile on your virtual server, please remove the FastL4 profile and make sure you have a TCP profile and an HTTP profile. (This should have the 'standard' VS type in the WebUI)

 modify ltm virtual my_vs profiles delete { fastl4 }
 modify ltm virtual my_vs profiles add { http }