EAP 6 docs are missing a section that was part of EAP 5 https://access.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/5/html/Administration_And_Configuration_Guide/ch28s06s03.html see https://access.redhat.com/site/solutions/123073 for eap 6 instructions
There's one small problem with this: the chapter "15.8.1. Nodes do not form a cluster" speaks about a directory "JBOSS_HOME/server/production/lib", which no longer exists with EAP 6 (clearly a copy from EAP 5 documentation). The subsequent commands are correct, though, so it's sufficient to just remove the single reference to the "server/production/lib" directory. Reviewed in Revision 6.4.0-6.
Verified in Revision 6.4.0-9.