Installation guide

Fig u re 1.4 . Fib re Ch an nel Swit ch Fen cin g Example
Specifying a fencing method consists of editing a cluster configuration file to assign a fencing-
method name, the fencing agent, and the fencing device for each node in the cluster.
The way in which a fencing method is specified depends on if a node has either dual power supplies
or multiple paths to storage. If a node has dual power supplies, then the fencing method for the node
must specify at least two fencing devices — one fencing device for each power supply (refer to
Figure 1.5, “ Fencing a Node with D ual Power Supplies” ). Similarly, if a node has multiple paths to
Fibre Channel storage, then the fencing method for the node must specify one fencing device for
each path to Fibre Channel storage. For example, if a node has two paths to Fibre Channel storage,
the fencing method should specify two fencing devices — one for each path to Fibre Channel storage
(refer to Figure 1.6, “ Fencing a Node with Dual Fibre Channel Connections” ).
Red Hat Ent erprise Linux 5 Clust er Suit e Overview
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