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Administration Console Online Help

Cluster --> Configuration --> Multicast

Tasks Additional Documentation Attributes

Overview

Use this tab to configure the address and port upon which the server instances in a cluster broadcast service availability and heart beat messages. It is most efficient to dedicate the multicast address and port to a single cluster, although multiple WebLogic Server clusters can share a single multicast address and port. No other applications should broadcast or subscribe to the multicast address and port used by your cluster or clusters.

Tasks

Configuring a Cluster

Additional Documentation

(Requires an Internet connection.)

"One-to-Many Communication Using IP Multicast" in Using WebLogic Server Clusters

"Cluster Multicast Address and Port" in Using WebLogic Server Clusters

Attributes

Attribute Label | Description | Value Constraints
--- | --- | ---
Multicast Address | Defines the multicast address used by cluster members to communicate with each other. MBean: weblogic.management. configuration.ClusterMBean Attribute: MulticastAddress | Default: "237.0.0.1" Configurable: yes Readable: yes Writable: yes
Multicast Port | Defines the multicast port used by cluster members to communicate with each other. MBean: weblogic.management. configuration.ClusterMBean Attribute: MulticastPort | Minimum: 1 Maximum: 65535 Default: 7001 Configurable: yes Readable: yes Writable: yes
Multicast Send Delay | Defines the number of milliseconds to delay sending message fragments over multicast in order to avoid OS-level buffer overflow. MBean: weblogic.management. configuration.ClusterMBean Attribute: MulticastSendDelay | Minimum: 0 Maximum: 100 Default: 12 Configurable: yes Readable: yes Writable: yes
Multicast TTL | Defines the number of network hops that a cluster multicast message is allowed to travel. 1 restricts the cluster to one subnet. MBean: weblogic.management. configuration.ClusterMBean Attribute: MulticastTTL | Minimum: 1 Maximum: 255 Default: 1 Configurable: yes Readable: yes Writable: yes
Multicast Buffer Size | Defines the multicast socket send/receive buffer size. MBean: weblogic.management. configuration.ClusterMBean Attribute: MulticastBufferSize | Units: kilobytes Minimum: 64 Default: 64 Readable: yes Writable: yes