Siddhartha De [https://community.jboss.org/people/sid_de] created the discussion "Re: Running several JBOSS 7_1_1 clusters on the same network" To view the discussion, visit: https://community.jboss.org/message/831120#831120 -------------------------------------------------------------- Hi Wolf ,   Thank you for your answers .  Could you kindly elaborate on point 3  . I understand that the multicast-port is used for multicast messages which form the foundations of the cluster , but am still unclear as to what we need the port 55200 for .   Also a few further add-on questions :- 4> Let us say that I have 2 clusters running with different multicast address + port combinations ... in case the cluster names  are  the same , will there be an issue ?   5> The cluster names are the same as the names ( output of the hostname command ... assuming a Unix box ) of the first node starting the cluster right ? 6> Assuming that running more than 1 JBOSS cluster on the same network is a common requirement , what are the default methods that are generally used to guarantee unique multicast-address + port combinations ?    In our case we were thinking about setting the last 3 octets of the multicast address as the same as the last 3 octets of the IP address of the first node of  the cluster   ( assuming locally assignable multicast addresses belong to the range 239.0.0.0  -  239.255.255.255  )     .   -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/831120#831120] Start a new discussion in Beginner's Corner at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]