Recommendations for Oracle Net Services When Upgrading Oracle Database
You must ensure that the listener is running in your new release Oracle home.
If the Oracle Database that you are upgrading does not have a listener
configured, then before you start the upgrade, you must run Oracle Net Configuration
Assistant (NETCA
) to configure the listening protocol address and
service information for the new release of Oracle Database, including a
listener.ora
file. The current listener is backward-compatible with
earlier Oracle Database releases.
If you are upgrading Oracle Real Application Clusters Oracle Database, or a release older than Oracle Database 12c, then review the following additional information.
For
Oracle RAC database upgrades, the listener normally is migrated during the Grid
Infrastructure upgrade. You must administer the listener by using the
lsnrctl
command in the Oracle Grid Infrastructure home. Do not
attempt to use the lsnrctl
commands from Oracle home locations for
earlier releases.
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