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| Oracle Solaris Cluster Geographic Edition Installation Guide

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## Planning Required IP Addresses and Hostnames

You must have all the required IP addresses and hostnames before you begin the installation process.

- You must set up a number of IP addresses for various Geographic Edition components, depending on your cluster configuration.

- You must have an IP address for the cluster name and for each cluster node.

- You might also need additional IP addresses for data replication products.

For more information about requirements for configuring data replication, see the following data replication guides:

- Oracle Solaris Cluster Geographic Edition Data Replication Guide for Sun StorageTek Availability Suite

- Oracle Solaris Cluster Geographic Edition Data Replication Guide for Hitachi TrueCopy and Universal Replicator

- Oracle Solaris Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility

- Oracle Solaris Cluster Geographic Edition Data Replication Guide for Oracle Data Guard

- Appendix F, Deployment Example: Replicating Data With MySQL, in Oracle Solaris Cluster Geographic Edition System Administration Guide

- Chapter 10, Script-Based Plug-Ins, in Oracle Solaris Cluster Geographic Edition System Administration Guide

See Public-Network IP Addresses in Oracle Solaris Cluster Software Installation Guide for a list of components that require IP addresses. Add these IP addresses to any naming services that are used. Also add these IP addresses to the local `/etc/inet/hosts` file on each cluster node after you install Oracle Solaris software.

A cluster name must be suitable as a hostname because Geographic Edition software creates the logical hostname by using the cluster name. Therefore, the cluster name must be in the naming system.

Also, cluster names must be unique. For example, if you have a cluster wholly within the domain `.france`, you can use hostnames like `paris` and `grenoble`. However, if you have a cross-domain cluster, you must specify the hostnames with enough qualification to identify the host on the network. You can link `paris` and `munich` with hostnames `paris.france` and `munich.germany`, and the cluster names remain `paris` and `munich`.

You cannot create a partnership between clusters `paris.france` and `paris.texas` because of a collision on the cluster name `paris`.

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