Rollback of the system will result in the rollback of the SE(s) followed by the rollback of the NSX Advanced Load Balancer Controller.
Use the following CLI and REST API for performing rollback for a patch version for NSX Advanced Load Balancer system (Controller and SE groups).
Using NSX Advanced Load Balancer CLI
[admin:controller]: > rollback system
Using NSX Advanced Load Balancer REST API
POST api/rollback JSON data:{‘system’:true}
POST api/rollback JSON data:{‘system’:true,‘rollback_type’:2}