When the Type attribute is LOCAL (the default for cluster instances), the Enterprise Server will start and stop the MQ broker specified as the Default JMS host. The MQ process is started out-of-process, in a separate VM, from the appliciation server process. Enterprise Server supplies an additional port to the broker . This port will be used by the broker to start the RMI registry. This port number will be equal to the configured JMS port for that instance plus 100. For example, if the JMS port number is 37676, then this additional port number will be 37776.
To create a one-to-one relationship between Enterprise Server instances and Message Queue brokers, set the type to LOCAL and give each Enterprise Server instance a different default JMS host. You can do this regardless of whether clusters are defined in the Enterprise Server or MQ.
With LOCAL type, use the Start Arguments attribute to specify MQ broker startup parameters.