ORA-12543: TNS:destination host unreachable
Connectivity errors are common questions on Oracle related forums and in many cases they are highly misunderstood by the poster of the questions and some responders.
This aim of this document is to show a method for diagnosis and resolution to a scenario in which an ORA-12543 is raised during the connection to a database.
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Restore database to another host using RMAN
This document will detail the steps to restore a database on a new host using RMAN. For this demonstration we will be using Oracle Database 11gR2 on Linux and disk based backup.