How do I configure a Queue/Topic to work in a cluster in JBoss?

JBoss AS 5

Just set the Clustered attribute to "true" in your Queue/Topic definition. Here's a Queue example: 

<mbean code="org.jboss.jms.server.destination.QueueService"
     name="jboss.messaging.destination:service=Queue,name=SampleQueue"
     xmbean-dd="xmdesc/Queue-xmbean.xml">
     <depends optional-attribute-name="ServerPeer">jboss.messaging:service=ServerPeer</depends>
     <depends>jboss.messaging:service=PostOffice</depends>
     <attribute name="Clustered">true</attribute>

  </mbean>