Use scripting and the wsadmin tool to stop a cluster.
Perform the following steps to stop a cluster:
set cluster [$AdminControl completeObjectName cell=mycell,type=Cluster,name=cluster1,*]
cluster = AdminControl.completeObjectName('cell=mycell,type=Cluster,name=cluster1,*') print cluster
WebSphere:cell=mycell,name=cluster1,mbeanIdentifier=Cluster,type=Cluster,process=cluster1
$AdminControl invoke $cluster stop
AdminControl.invoke(cluster, 'stop')