Hi Maureen, 2 things to consider... - pmon uses this adress to post databases services (dba_services) to a listener on this adress for dynamic service registration if the same listener listens on other adresses/interfaces the service is available there as well - a dataguard broker configuration uses this adress to build some parameters like log_archive_dest_2, fal_client, etc. for the log transport so I set it if I want to use dynamic service registration and my listener port is not 1521 or in most dataguard configs HTH Mathias -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Maureen English Sent: Saturday, December 06, 2008 2:16 AM To: oracle-l@xxxxxxxxxxxxx Subject: Simple listener parameter question Hi, For those of you who have a LISTENER running on the same machine as your database(s), do you configure the local_listener parameter to have the actual host name, or localhost? Does anyone know of any reason not to use something like local_listener='(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1234))' - Maureen -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l