All servers managed by a load balancer must have homogenous configurations, including the same set of applications deployed to them. Once an application is deployed and enabled for access (this happens during or after the deployment step) you must enable it for load balancing. If an application is not enabled for load balancing, requests to it are not load balanced and failed over, even if requests to the servers the application is deployed to are load balanced and failed over.
When enabling the application, specify the application name and target. If the load balancer manages multiple targets (for example, two clusters), enable the application on all targets.
To enable an application using the Admin Console, on the left frame, click the HTTP Load Balancers node and then click the desired load balancer listed under the node. Open the Targets tab as mentioned above and click the required cluster. Now, open the Applications tab, select the required application and from the More Actions drop-down list, and select Load Balancer Enable. If you want to do this from the command line, you can use the command asadmin enable-http-lb-application. For more information about the command, see the man pages.
If you deploy a new application, you must also enable it for load balancing and export the load balancer configuration again.