Compaq 230039-001 - StorageWorks NAS Executor E7000 Model 904 Server Installation Manual page 17

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In production clustering scenarios more than one private network for
cluster communication must be used to avoid having a single point of
failure. Cluster service can use private networks for cluster status signals
and cluster management, which provides more security than using a
public network for these roles. It is possible to use a public network for
cluster management, or use a mixed network for both private and public
communications. In any case, make sure at least two networks are used
for cluster communication, as using a single network for node-to-node
communication represents a potential single point of failure. Multiple
networks should be used, with at least one network configured as a
private link between the cluster nodes. Other connections can be made
through a public network. If there is more than one private network,
make sure that each uses a different subnet, as the Cluster service
recognizes only one network interface per subnet.
This document is built on the assumption that only two networks are in
use. It shows how to configure these networks as one mixed and one
private network.
The order in which the Cluster Service Configuration Wizard presents
these networks may vary. In this example, the public network is
presented first.
12. Click Next in the Configuring Cluster Networks dialog box.
13. Make sure that the network name and IP address correspond to the network interface for
the public network.
14. Check the box Enable this network for cluster use.
15. Select the option All communications (mixed network) as shown in Figure 10
below.
16. Click Next.
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