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34 Preparing Your Systems for Clustering
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Configuring Windows Networking
You must configure the public and private networks in each node before you install the Cluster
Service. The following sections introduce you to some principles and procedures necessary to
the networking prerequisites.
Assigning Static IP Addresses to Your Cluster Resources and Components
A static IP address is an Internet address that a network administrator assigns exclusively to a
system or a resource. The address assignment remains in effect until it is changed by the
network administrator.
The IP address assignments for the public LAN segments will depend on the configuration of
your environment. If the IP assignments are set up correctly, all of the network adapter resources
will respond to ping commands and appear online before and after you install MSCS. If the
IP assignments are not set up correctly, the cluster nodes may not be able to communicate with
the domain. See "Troubleshooting" for more information.
PowerEdge Cluster configurations running the Windows operating system require static
IP addresses assigned to hardware and software applications in your cluster, as listed in Table 3-1.
Table 3-1. Applications and Hardware Requiring IP Address Assignments
Application/Hardware Description
Cluster IP address The cluster IP address is used for cluster management and must
correspond to the cluster name. Because each server has at least two
network adapters, the minimum number of static IP addresses required
for a cluster configuration is five (one for each network adapter and one
for the cluster). Additional static IP addresses are required when MSCS
is configured with application programs that require IP addresses, such
as file sharing.
Cluster-aware applications
running on the cluster
These applications include Microsoft SQL Server, Enterprise Edition
Microsoft Exchange Server, and Internet Information Server (IIS). For
example, Microsoft SQL Server, Enterprise Edition requires at least one
static IP address for the virtual server. (Microsoft SQL Server does not
use the cluster's IP address.) Also, each IIS Virtual Root or IIS Server
instance configured for failover needs a unique static IP address.
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