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# Configuring a Multicast Group Address

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A multicast group address is an Internet Protocol (IP) address in the range 224.0.0.0 to 239.255.255.255 that identifies the members of an IP multicast group. To efficiently broadcast the same message to all members of an IP multicast group, you configure each recipient with the same multicast group address and send the message to that address.

Table: Coordinated Cache Support for Multicast Group Address Configuration summarizes which coordinated caches support multicast group address configuration.

Coordinated Cache Support for Multicast Group Address Configuration

Coordinated Cache | Using TopLink Workbench | Using Java
--- | --- | ---
JMS Coordinated Cache |  |
RMI Coordinated Cache |  |
CORBA Coordinated Cache |  |
Custom Coordinated Cache |  |

Note: Ensure your host and network are configured to support multicast operation before configuring this option.

In addition to configuring the multicast group address, you must also configure the multicast port (see "Configuring a Multicast Port") for the coordinated cache types shown in Table: Coordinated Cache Support for Multicast Group Address Configuration.