Getting Started Guide

Preparing Nodes for Oracle Installation 17
Table 2-1 describes the different interfaces, IP address settings and the
resolutions in a cluster.
Configuring a DNS Server
To configure changes on a DNS server for an Oracle 11g R2 cluster using a
DNS (without GNS):
1
Configure SCAN NAME resolution on DNS server.
A SCAN NAME configured on the DNS server using the Round Robin
policy should resolve to three public IP addresses (recommended),
however the minimum requirement is one public IP address.
For example:
scancluster IN A 192.0.2.1
IN A 192.0.2.2
IN A 192.0.2.3
Where scancluster is the SCAN NAME provided during Oracle Grid
installation.
NOTE: The SCAN IP address must be routable and must be in public range.
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
Table 2-1. Cluster Requirements for DNS
Interface Type Resolution
Public Static DNS
Private Static Not required
Node virtual IP Static DNS
SCAN virtual IP Static DNS
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