Starting with Oracle Clusterware 11g Release 2, you no longer need to provide a private name or IP
address for the interconnect. IP addresses on the subnet that you identify as private are assigned as
private IP addresses for cluster member nodes. You do not need to configure these addresses
manually in a host’s directory. If you want name resolution for the interconnect, then you can configure
private IP names in the hosts’ file or DNS. However, Oracle Clusterware assigns interconnect
addresses on the interface defined during installation as the private interface (eth1, for example), and
to the subnet used for the private subnet. In practice, and for the purpose of this guide, continue to
include a private name and IP address on each node for the RAC interconnect. It provides selfdocumentation
and a set of endpoints on the private network that you can use for troubleshooting
purposes:
10.11.110.80 racnode1-priv
10.11.110.201 racnode2-priv