If you change the balancing policy of an active farm (for example, from round-robin to wt-round-robin), the farm goes through the update process. However, after the process is completed, the load balancer configuration still shows the initial policy (for example, round-robin).
Workaround: If you have already defined virtual IPs and you want to change their policies, follow these steps:
Delete the virtual IPs whose policy you want to change, and submit the request.
Change the policy to the newly desired policy.
Re–create the virtual IPs, and submit the request.