Fusion Middleware Control Help for WebLogic Server

Template: Configuration: Multicast

Configuration Options     

Use this page to define the multicast settings for JMS topics that are based on this template. Multicast enables the delivery of messages to a select group of hosts that subsequently forward the messages to subscribers.

IP multicast is a simple broadcast technology that enables multiple applications to "subscribe" to a given IP address and port number and listen for messages. A multicast address is an IP address in the range from 224.0.0.0 to 239.255.255.255.

Configuration Options

Name	Description
Multicast Address	The IP address that this topic uses to transmit messages to multicast consumers. MBean Attribute (Does not apply to application modules) : MulticastParamsBean.MulticastAddress Changes take effect after you redeploy the module or restart the server.
Multicast TTL	The number of routers that a message traverses en route to a consumer. A value of 1 limits the message to one subnet (which prevents it from traversing any routers). This value is independent of the JMSExpirationTime value. MBean Attribute (Does not apply to application modules) : MulticastParamsBean.MulticastTimeToLive Maximum value: 255 Changes take effect after you redeploy the module or restart the server.
Multicast Port	The IP port that this topic uses to transmit messages to multicast consumers. MBean Attribute (Does not apply to application modules) : MulticastParamsBean.MulticastPort Minimum value: 1 Maximum value: 65535 Changes take effect after you redeploy the module or restart the server.