Fujitsu Siemens Computers MegaRAID 320, User Manual

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Cluster Installation 4-19
Copyright © 2003 by LSI Logic Corporation. All rights reserved.
In production clustering scenarios, you must use more than one private
network for cluster communication; this avoids having a single point of
failure. Cluster Service can use private networks for cluster status signals
and cluster management. This provides more security than using a public
network for these roles. Also, you can use a public network for cluster
management; or you can use a mixed network for both private and public
communications.
Verify that at least two networks are used for cluster communication.
Using a single network for node-to-node communication creates a
potential single point of failure. We recommend that you use multiple
networks, with at least one network configured as a private link between
nodes, and other connections through a public network. If you use more
than one private network, ensure that each uses a different subnet, as
Cluster Service recognizes only one network interface per subnet.
This document assumes that only two networks are in use. It describes
how you can configure these networks as one mixed and one private
network.