Fusion Middleware Control Help for WebLogic Server

Cluster: Administration: Messaging

Configuration Options     Advanced Configuration Options     

This page allows you to define the messaging settings for this cluster. Clusters use messaging for sharing session, load balancing and failover, JMS, and other information between cluster members. Clusters can use either unicast or multicast messaging. Multicast is a simple broadcast technology that enables multiple applications to subscribe to a given IP address and port number and listen for messages, but requires hardware configuration and support. Unicast does not have these requirements.

Configuration Options

Name	Description
Messaging Mode	Specifies the messaging type used in the cluster. Multicast messaging is provided for backwards compatibility. MBean Attribute: ClusterMBean.ClusterMessagingMode
Unicast Broadcast Channel	Specifies the channel used to handle communications within a cluster. If no channel is specified the default channel is used. ClusterBroadcastChannel is only are supported if the unicast messaging type is used. MBean Attribute: ClusterMBean.ClusterBroadcastChannel Changes take effect after you redeploy the module or restart the server.
Multicast Address	The multicast address used by cluster members to communicate with each other. The valid range is from from 224.0.0.0 to 239.255.255.255. The default value used by WebLogic Server is 239.192.0.0. You should avoid using multicast addresses in the range x.0.0.1 This address should be unique to this cluster and should not be shared by other applications. MBean Attribute: ClusterMBean.MulticastAddress Changes take effect after you redeploy the module or restart the server.
Multicast Port	The multicast port (between 1 and 65535) used by cluster members to communicate with each other. Defines the multicast port used by cluster members to communicate with each other. MBean Attribute: ClusterMBean.MulticastPort Minimum value: 1 Maximum value: 65535 Changes take effect after you redeploy the module or restart the server.

Advanced Configuration Options

Name	Description
Multicast Send Delay	The amount of time (between 0 and 250 milliseconds) to delay sending message fragments over multicast in order to avoid OS-level buffer overflow. Defines the number of milliseconds to delay sending message fragments over multicast in order to avoid OS-level buffer overflow. MBean Attribute: ClusterMBean.MulticastSendDelay Minimum value: 0 Maximum value: 250 Changes take effect after you redeploy the module or restart the server.
Multicast TTL	The number of network hops (between 1 and 255) that a cluster multicast message is allowed to travel. Defines the number of network hops that a cluster multicast message is allowed to travel. 1 restricts the cluster to one subnet. MBean Attribute: ClusterMBean.MulticastTTL Minimum value: 1 Maximum value: 255 Changes take effect after you redeploy the module or restart the server.
Multicast Buffer Size	The multicast socket send/receive buffer size (at least 64 kilobytes). Returns the multicast socket send/receive buffer size. MBean Attribute: ClusterMBean.MulticastBufferSize Minimum value: 64 Changes take effect after you redeploy the module or restart the server.
Idle Periods Until Timeout	Maximum number of periods that a cluster member will wait before timing out a member of a cluster. Maximum number of periods that a cluster member will wait before timing out a member of a cluster. MBean Attribute: ClusterMBean.IdlePeriodsUntilTimeout Minimum value: 3 Changes take effect after you redeploy the module or restart the server.
Enable Data Encryption	Enables multicast data to be encrypted. Only the multicast data is encrypted. Multicast header information is not encrypted. MBean Attribute: ClusterMBean.MulticastDataEncryption Changes take effect after you redeploy the module or restart the server.