Owner's Manual

16 Configuring Your Network

Configuring Host Name Resolution

Add host entries within the %SystemRoot%\system32\drivers\etc\hosts file

domain name. On each node, modify lines in the

%SystemRoot%\system32\drivers\etc\hosts file by typing:

127.0.0.1 localhost

For a Cluster Using DNS

To set up an Oracle 11g R2 RAC using Oracle DNS (without GNS):

Configure at least two interfaces on each node, one for the private IP address

and one for the public IP address.

Configure a SCAN NAME for the DNS for Round Robin resolution to three

addresses (recommended) or at least one address. The SCAN addresses must

be on the same subnet as virtual IP addresses and public IP addresses.

NOTE:

For high availability and scalability, it is recommended that you configure the

SCAN to use Round Robin resolution to three IP addresses. The name for the SCAN

cannot begin with a numeral. For installation to succeed, the SCAN must resolve to at

least one address.

Table 2-3 describes the different interfaces, IP address settings and the resolutions

in a cluster.

Table 2-3. IP Address Settings in a Cluster Using DNS

Interface Type Resolution

Public Static %SystemRoot%\system32\

drivers\etc\hosts or DNS

Private Static Not required

Node virtual IP Static %SystemRoot%\system32\

drivers\etc\hosts or DNS

SCAN virtual IP Static DNS