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Cluster --> Configuration --> Multicast

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

Attributes

Table 29-1

Attribute Label	Description	Value Constraints
Multicast Address	The multicast address used by cluster members to communicate with each other. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `MulticastAddress`	Minimum: 224.0.0.0 Maximum: 239.255.255.255 Default:237.0.0.1 Configurable: yes
Multicast Port	The multicast port used by cluster members to communicate with each other. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `MulticastPort`	Minimum: 1 Maximum: 65535 Default: 7777 Configurable: yes
Multicast Send Delay	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: 3 Configurable: yes
Multicast TTL	The time-to-live value for the cluster's multicast address. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `MulticastTTL`	Minimum: 1 Maximum: 255 Default: 1 Configurable: yes
Multicast Buffer Size	The multicast socket send/receive buffer size. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `MulticastBufferSize`	Units: kilobytes Minimum: 64 Default: 64 Configurable: yes

Attribute Label

Description

Value Constraints

Multicast Address

The multicast address used by cluster members to communicate with each other.

MBean: weblogic.management. configuration.ClusterMBean

Attribute: MulticastAddress

Minimum: 224.0.0.0

Maximum: 239.255.255.255

Default:237.0.0.1

Configurable: yes

Multicast Port

The multicast port used by cluster members to communicate with each other.

MBean: weblogic.management. configuration.ClusterMBean

Attribute: MulticastPort

Minimum: 1

Maximum: 65535

Default: 7777

Configurable: yes

Multicast Send Delay

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: 3

Configurable: yes

Multicast TTL

The time-to-live value for the cluster's multicast address.

MBean: weblogic.management. configuration.ClusterMBean

Attribute: MulticastTTL

Minimum: 1

Maximum: 255

Default: 1

Configurable: yes

Multicast Buffer Size

The multicast socket send/receive buffer size.

MBean: weblogic.management. configuration.ClusterMBean

Attribute: MulticastBufferSize

Units: kilobytes

Minimum: 64

Default: 64

Configurable: yes

Cluster --> Configuration --> Multicast

Overview

Tasks

Related Topics

Attributes