Getting Started Guide

18 Preparing Nodes for Oracle Installation
Configuring a DNS Client
To configure the changes required on the cluster nodes for name resolution:
1
Configure the resolv.conf on all the nodes in the cluster to contain name
server entries that are resolvable to the appropriate DNS server. Provide an
entry similar to the following:
/etc/resolv.conf:
search ns1.domainserver.com
nameserver 192.0.2.100
Where, 192.0.2.100 is a valid DNS server address in your network and
ns1.domainserver.com is the domain server in your network.
2 Verify the order configuration. /etc/nsswitch.conf controls the name
service order. In some configurations, the NIS can cause issues with Oracle
SCAN address resolution. It is recommended that you place the NIS entry
at the end of the search list and place the dns entry first. For example,
hosts: dns files nis
Once you have modified the /etc/nsswitch.conf , restart the nscd service by
issuing the command:
# /sbin/service nscd restart