FORWARD_LISTENER

1.128 FORWARD_LISTENER

FORWARD_LISTENER specifies the name of a listener to which a connection must be forwarded by an existing set of remote listeners.

Examples

Property	Description
Parameter type	String
Syntax	`FORWARD_LISTENER = listener-name`
Default value	NULL
Modifiable	`ALTER SYSTEM`
Modifiable in a PDB	Yes
Basic	No
Oracle RAC	A different value can be set on different instances.

The parameter is useful when it is difficult to change an existing client connect string, for example, after an offsite database has been moved into the Oracle Cloud. With the FORWARD_LISTENER parameter, clients can continue to connect to their offsite listener, and the offsite listener forwards the connection to the Oracle Cloud listener.

Once a forward listener has been configured through the FORWARD_LISTENER parameter, the LOCAL_LISTENER parameter can be cleared by setting its value to -oracle-none- so that all the connections coming to an existing set of remote listeners configured through the REMOTE_LISTENER parameter are forwarded only to listeners configured through FORWARD_LISTENER.

The FORWARD_LISTENER parameter can also be specified in the LISTENER_NETWORKS parameter.

The following setup can be used to forward all the database connections coming to an existing customer SCAN listener to the Oracle Cloud SCAN listener.

REMOTE_LISTENER=customer-scan
FORWARD_LISTENER=oracle-cloud-scan
LOCAL_LISTENER=oracle-none-