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5.2. Network Topology
Clusterware requires a heartbeat network, and an inter-node network for moving database block between nodes (GCS). These are usually the same network, and often the same network as the Red Hat Cluster Suite network.
It is critical that Red Hat Cluster Suite operates heartbeat services over the private, bonded network and not the public network. If the private network fails for a node, then this node must be removed from the cluster. If the public network fails, the application tier cannot access the database on the node, but the CRS VIP service is responsible for the public network.
<clusternode name="rac7-priv" nodeid="1" votes="1">
<multicast addr="225.0.0.12" interface="bond0"/>
<fence>
<method name="1">
<device name="jLO7"/>
</method>
</fence>
</clusternode>
<clusternode name="rac8-priv" nodeid="2" votes="1">
<multicast addr="225.0.0.12" interface="bond0"/>
<fence>
<method name="1">
<device name="jLO8"/>
</method>
</fence>
</clusternode>
While most customers do not bond this interface, it is supported by Oracle.
