Re: NIC alias in Rhel 7 oracle rac

Posted by ErmanArslansOracleBlog on Aug 30, 2021; 8:16am
URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/NIC-alias-in-Rhel-7-oracle-rac-tp10184p10188.html

Those are virtual interfaces. The reason for using them differs according to the scenario..
For instance, we use them in RAC in order to be able get rid of the need for waiting the TCP timeout..
We failover the those virtual ones and respond in case of a network or node failure..
We response but the listeners of the remaining node/or nodes will not get the connection from that migrated ip address.
But we reply! no waiting for TCP timeout there.
So the client gets the reply (the errors) and continues with the next available ip addresses supported by the listener of the survived node or nodes..
So it depends.. Read some docs and you will see other scenarios for understanding the reason behind using these types of interfaces.