Last updated on OCTOBER 17, 2016
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 to 18.104.22.168 [Release 11.2 to 12.1]
Information in this document applies to any platform.
This document explains how the sqlnet.ora file settings for TCP.VALIDNODE_CHECKING and TCP.INVITED_NODES work with Oracle's Data Guard
Adding only the standby database to the TCP.INVITED_NODES parameter on the standby does not impact the operation of Oracle's Data Guard product. I can not TNSping the standby from the primary, I can not connect via telnet to port 1521 nor can I log onto the standby via SQL*Plus from the primary. These attempts get ORA-12537. Expected Data Guard connections to fail since the hosts are not in the access list.
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