> # Coherence Cluster: Configuration: General

> Configuration Options Related Tasks Related Topics

> Use this page to configure properties for this Coherence cluster.

> #### Configuration Options

> Name | Description
> --- | ---
> Name | Name of this Coherence cluster configuration.
> Use a Custom Cluster Configuration File | Specifies whether this configuration resides in an external custom configuration file. MBean Attribute: `CoherenceClusterSystemResourceMBean.UsingCustomClusterConfigurationFile` Changes take effect after you redeploy the module or restart the server.
> Custom Configuration File Name | The location of the custom configuration file relative to the Domain Configuration directory. Use this field to import a new configuration file. MBean Attribute: `CoherenceClusterSystemResourceMBean.CustomClusterConfigurationFileName` Changes take effect after you redeploy the module or restart the server.
> Cluster Listen Port | The cluster listen port used by Coherence; Coherence cluster members use this port to discover and join, or create the cluster. If unspecified, the Coherence cluster multicast listen port will be used. MBean Attribute: `CoherenceClusterParamsBean.ClusterListenPort` Minimum value: `0` Maximum value: `65535` Changes take effect after you redeploy the module or restart the server.
> Transport | Specify the underlying transport protocol to use for cluster communication. The TMB, SDMB, or IMB are only applicable to Exalogic environment. MBean Attribute: `CoherenceClusterParamsBean.Transport` Changes take effect after you redeploy the module or restart the server.
> Multicast Listen Address | The IP address for the cluster multicast listener. MBean Attribute: `CoherenceClusterParamsBean.MulticastListenAddress` Changes take effect after you redeploy the module or restart the server.
> Clustering Mode | Specifies a clustering mode of either Unicast or Multicast. If multicast is undesirable or unavailable in an environment, or when an environment is not properly configured to support multicast, then setting up the Well Known Addresses (WKA) feature is required. All cluster multicast communication is disabled if WKA is enabled. MBean Attribute: `CoherenceClusterParamsBean.ClusteringMode` Changes take effect after you redeploy the module or restart the server.
> Time To Live | Sets the time-to-live (TTL) setting for the multicast message. The TTL setting designates how far multicast UDP/IP packets can travel on a network. The TTL is expressed in terms of how many hops a packet survives; each network interface, router, and managed switch is considered one hop. The TTL value should be set to the lowest integer value that works. Setting the value too high can use unnecessary bandwidth on other LAN segments and can even cause the operating system or network devices to disable multicast traffic. Typically, setting the TTL value to 1 works on a simple switched backbone. A value of 2 or more may be required on an advanced backbone with intelligent switching. A value of 0 is used for single server clusters that are used for development and testing. MBean Attribute: `CoherenceClusterParamsBean.TimeToLive` Minimum value: `0` Maximum value: `255` Changes take effect after you redeploy the module or restart the server.

> Related Tasks

> - Create Coherence clusters
> - Configure Coherence clusters
> - Configure well known addresses
> - Target Coherence clusters
> - Configure Coherence logging

> Related Topics

> - Configuring and Managing Coherence Clusters
> - Communications in a Cluster
> - Cluster Addressing Information
> - Deploying Coherence Applications in WebLogic Server