This overview section describes how to configure your cluster setup. See also the Mediation Clustering for additional advice about mediation HA. For the initial installation and setup, follow these steps:
1. Plan your server/partition layout.
• Identify the server providing database services.
• Identify the application servers that are members of the cluster.
• Identify the mediation agent(s) and clients that connect to the cluster.
2. Ensure you have a permanent, static IP address for each server that is to be a member of the cluster.
3. Create your cluster name. You must also assign an IP multicast address to the cluster for communication between the servers. The IP multicast address must be in the range from 220.127.116.11 - 18.104.22.168. The assignment of the IP multicast should be coordinated through your system administrator so that conflicts do not occur with other applications. See Configuring the Cluster’s Multicast Address.
4. Set up an entry in the DNS with the server name and the IP address for each server to be a member of the cluster. Minimally, you must map the server name and IP address in the hosts file. (In Windows, for example, this is in c:\WINNT\System32\Drivers\etc.)
5. Ensure that the Server installation is on each machine that is a member of the cluster. If you have not installed the application, install it now, using the Custom installation to configure various hosts as Application Servers, Mediation Servers, Database Servers, and Clients.
Clustered servers must be on the same subnet. Clustered application servers can, however, be on a different subnet than clustered mediation servers (which must, themselves, be on the same subnet).