Administration Console Online Help
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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
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Description
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Value Constraints
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Multicast Address
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Defines the multicast address used by cluster members to communicate with each other.
MBean: weblogic.management. configuration.ClusterMBean
Attribute: MulticastAddress
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Default: "237.0.0.1"
Configurable: yes
Readable: yes
Writable: yes
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Multicast Port
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Defines the multicast port used by cluster members to communicate with each other.
MBean: weblogic.management. configuration.ClusterMBean
Attribute: MulticastPort
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Minimum: 1
Maximum: 65535
Default: 7001
Configurable: yes
Readable: yes
Writable: yes
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Multicast Send Delay
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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
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Minimum: 0
Maximum: 100
Default: 12
Configurable: yes
Readable: yes
Writable: yes
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Multicast TTL
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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
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Minimum: 1
Maximum: 255
Default: 1
Configurable: yes
Readable: yes
Writable: yes
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Multicast Buffer Size
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Defines the multicast socket send/receive buffer size.
MBean: weblogic.management. configuration.ClusterMBean
Attribute: MulticastBufferSize
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Units: kilobytes
Minimum: 64
Default: 64
Readable: yes
Writable: yes
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