> # Jolt Connection Pools: Configuration: Addresses

> Configuration Options Related Tasks

> Use this page to define a preferred (primary) list of Jolt Service Listener (JSL) addresses and a failover list.

> The Jolt connection pool connects to Oracle Tuxedo using the primary JSL addresses unless it loses or cannot create connections to these addresses. In such a case, it uses the addresses in the failover list.

> #### Configuration Options

> Name | Description
> --- | ---
> Primary Addresses | The list of addresses for the primary Jolt Server Listeners (JSLs) on the Tuxedo system. The format of each address is: `//hostname:port`. Multiple addresses should be separated by commas. MBean Attribute: `JoltConnectionPoolMBean.PrimaryAddresses` Changes take effect after you redeploy the module or restart the server.
> Failover Addresses | The list of Jolt Server Listeners (JSLs) addresses that is used if the connection pool cannot estabilish connections to the Primary Addresses, or if the primary connections fail. The format of each address is: `//hostname:port`. Multiple addresses should be separated by commas. These JSLs need not reside on the same host as the primary JSLs. MBean Attribute: `JoltConnectionPoolMBean.FailoverAddresses` Changes take effect after you redeploy the module or restart the server.

> Related Tasks

> - Configure Jolt addresses