priority group activation

As far as I know, new connections will go to the higher group members of the pool once they become available. I don't think that there is a mechanism to move traffic from lower-priority group members to the higher one when this comes available. The lower priority members will process the established connections , but the new ones will go to the higher priority group members.

found these, they might help if you use an irule:

https://community.f5.com/t5/technical-forum/priority-group-failback/m-p/181850#M165544

https://community.f5.com/t5/technical-forum/priority-group-failback/m-p/52718#M36412

https://community.f5.com/t5/technical-forum/priority-group-activation-failback-with-http-cookie-insert/m-p/237687#M221381

https://community.f5.com/t5/technical-forum/reset-connections-to-lower-priority-group-member-when-higher/m-p/271537#M255231