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listener_networks tips

Oracle Database Tips by Donald BurlesonMay 15, 2016

Question: What does the listener_networks parameter do?  Can you show an example of using the listener_networks parameter?

Answer:  The listener_networks parameter is new in 11g release 2 and it is used in the init.ora file (or spfile).  The listener_networks parameter specifies one or more sets of local & remote listeners for cross-registration. All listeners within the same network_name will cross-register.

The correct way to register my database to the listeners is to use the listener_networks parameter. It serves the purpose of cross-registration when you have listeners on multiple networks. Basically with it you can say, "register my local listeners on the public interfaces to the SCAN listener, register my local listeners on the private interface to each other".

SQL> alter system set listener_networks='((name=public_network)(local_listener=orcl_public_local)(remote_listener=rac-scan:1521))','((name=priv_network)(local_listener=orcl_private_local)(remote_listener=orcl_ib))';

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