JMS load balancing in JBoss EAP6

Issue

When I use full-ha profile to group a jms cluster (2 jboss instances in domain mode), then try to use jms client to send message to jms cluster. After several testing, I find the message always round robin to be deliver to both jms server's queue.

Now I get a little confuse, the message round robin dispatch is considered by jms client(jms client will auto dispatch the load to each jms server) or just redeliver by jms itself(server receive a message but redeliver to another server). Or jboss support both the two solution ?