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Oracle10g Grid Computing with RAC
Chapter 15 - RAC Migration Topics

Configuring Virtual IPs For 10g RAC

In order to verify that each node meets the network requirements, you should follow these steps:

  1. Verify the presence of, or install, the NICs (a minimum of 2) for the public and private networks and configure them with either public or private IP addresses.

  2. Use your OS utilities to register the host names and IP addresses for the public network interfaces in DNS.

  3. For each node in the cluster, register the virtual host name and IP address in DNS.

  4. Edit the /etc/hosts file (on UNIX or Linux) and add the private, public, and virtual interfaces. 

Let's look at an example on a two-node Linux system:

      [aultlinux1]/etc> more /etc/hosts
  # Do not remove the following line, or various programs
      # that require network functionality will fail.   aultlinux1   aultlinux2       int-aultlinux1       int-aultlinux2 aultlinux1-v aultlinux2-v       aultlinux1 localhost.localdomain   localhost

In this example, the int-* addresses are private and the *-v addresses are for the virtual IP's.

To identify the interface name and associated IP address for every network adapter, enter the following command: 

      # /sbin/ifconfig -a
   ...or /usr/bin/netstat -in on HP-UX
    ...or ipconfig on Windows

Notice that you don't have to add the virtual IP's to ifconfig, this is because the VIPCA (Virtual IP Configuration Assistant) does this for you.

At this point, if everything is properly configured, you should be able to ping the public IP names from any of the machines on the network, for example:

[aultlinux2]/home/oracle>ping aultlinux1
      Pinging [] with 32 bytes
      Reply from bytes=32 time<10ms TTL=255
      Reply from bytes=32 time<10ms TTL=255

Get the complete Oracle10g story:

The above text is an excerpt from "Oracle 10g Grid & Real Application Clusters", by Rampant TechPress.  Written by top Oracle experts, Mike Ault and Madhu Tumma, this book has a complete online code depot with ready to use scripts. 

To get the code instantly, click here:

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