After all the Oracle Names servers are created, have each Oracle Names server, except the first Oracle Names server in the administrative region, discover the other Oracle Names servers in a region. Discovery must be performed to find the other Oracle Names servers in the region..
To discover other Oracle Names servers:
Discovered Oracle Names Server in the region. Please exit the tool and start again.
If an Oracle Names server does not respond, a dialog will prompt you for another Oracle Names server address. If you know the network address of a particular Oracle Names server, enter it.