Oracle Database Oracle Clusterware Installation Guide for HP-UX

Identifying Software Requirements
3. Even if you are using a DNS, Oracle recommends that you add lines to the
/etc/hosts file on each node, specifying the private IP addresses and associated
private host names. Oracle also recommends that you add public and virtual IP
addresses. Configure the /etc/hosts file so that it is similar to as shown in the
following example, with private interface eth1, and private hosts nodeint1 and
nodeint2:, where xxx represents parts of a valid IP address.
#eth0 - PUBLIC
xxx.xxx.100.45 node1.example.com node1
xxx.xxx.100.46 node2.example.com node2
#eth1 - PRIVATE
10.0.0.1 nodeint1.example.com nodeint1
10.0.0.2 nodeint2.example.com nodeint2
#VIPs
xxx.xxx.100.47 pmvip1.example.com nodevip1
xxx.xxx.100.48 pmvip2.example.com nodevip2
4. To check network configuration, on each node, enter the following commands:
# hostname
# /usr/sbin/ifconfig interface_name
You can also check with the following command:
# usr/bin/netstat -in
Ensure that each server is properly identified, and that the interface name and IP
address for all network adapters that you want to specify as public or private
network interfaces are properly configured. In addition, use the ping command to
ensure that each node can obtain a response for the public and private IP
addresses from each other node in the cluster.
Note: When you install Oracle Clusterware and Oracle RAC, you
will require the public, private and virtual IP addresses. Make a
note of the addresses you configured in the /etc/hosts file or
DNS.
2.6.6 Configuring the Name Service Switch to Tolerate Public Network Failures
On HP-UX, to tolerate a complete public network failure, you should specify network
addresses in /etc/nsswitch.conf, to avoid VIP failover or public address network
failure response times being dependent on the network timeouts.
In the /etc/nsswitch.conf file, files must precede other entries for host, and
preferably precede other entries in nsswitch.conf.
2.7 Identifying Software Requirements
Depending on the products that you intend to install, verify that the following
software is installed on the system. The procedure following the table describes how to
check these requirements.
Oracle Clusterware Preinstallation Tasks 2-13