"manik.surtani(a)jboss.com" wrote : | IIRC, if the transport is UDP and multicast is enabled, this is achieved by multicasting and only named recipients accepting the comms (Bela or Vlad, perhaps you could confirm this?). | No, we always use unicasts. It is up to the caller of RpocDispatcher.callRemoteMethods() to decide whether a multicast or multiple unicasts are used. With TCP as transport, of course *always* use anycasting. With UDP (IP multicasting), it depends on the subset to which you want to send a message, e.g. 1-3 out of 10: anycast 4-10 out of 10: multicast View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995807#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...