MVP
MVPThank you for sharing the information.
Our customer is using GSLB but cannot add the APM license.
Do you know of any other solution?
MVPI guess you are trying to configure authentification for the BIG-IP itself, if this is the case, in the GUI there is only option to configure one LDAP server, but in tmsh you can configure multiple servers, however there is no official information on this and I don't know how this will behave.
If you want to try, the tmsh entry is "auth ldap system-auth servers" (e.g. create auth ldap system-auth servers {1.2.3.4 1.2.3.4 ...}