Replication Agent for Oracle 15.2 must be installed on the same host on which the primary Oracle server is running to directly access the Oracle transaction log files.
Using any of the upgrade procedures described in this section, the new Replication Agent for Oracle 15.2 instances will have the same configuration as previously existing instances, including instance names, administrative user IDs and passwords, and administrative port numbers.
Replication Agent for Oracle 15.2 does not support downgrading Replication Agent for Oracle 15.2 to an earlier log-based version.
Migrating Replication Agent 15.2 when upgrading Oracle 10g to 11g
Upgrading a trigger-based Replication Agent 12.5 when the primary Oracle is version 10g
Downgrading a log-based Replication Agent 15.2 to a trigger-based Replication Agent 12.5
For upgrades within a common release level, as in the case of an ESD applied to a particular version of Replication Agent, you should use the ra_admin -u option applied to a particular instance of Replication Agent or to all instances of Replication Agent. See the Replication Agent Administration Guide.