BIG-IP LTM supports internal and external classes (called Data Groups in the GUI) of address, string, and integer types. An internal class is stored in the bigip.conf file, whereas external classes a...
This very topic should be covered in the LTM advanced class at least as an appendix if not directly in the training. I used an external class that was not stored in the proper directory and support gave me instructions on how to include the dir that I dropped it in, rather than just saying move it to the var/class dir. Is this new in V10+? I hit the wall with 9.4.3 and the external class not being replicated and causing config sync to fail.