Using Serviceguard Extension for RAC, 5th Edition, June 2007

Serviceguard Configuration for Oracle 10g RAC
Cluster Communication Network Monitoring
Chapter 262
Cluster Communication Network Monitoring
This section describes the various network configurations for cluster
communications in a SGeRAC/10g RAC cluster, and how the package
configuration parameter CLUSTER_INTERCONNECT_SUBNET can be used to
recover from Oracle cluster communications network failures in certain
configurations.
Single Network for Cluster Communications
The single network configuration is the most common configuration for
network installations. In this configuration, there is sufficient
bandwidth for all cluster communications traffic to go through one
network. If there are multiple databases, all database traffic goes
through the same network.
As shown in Figure 2-1, both CSS-HB and SG-HB are on the same
network. The primary and standby interface pair protects against a
single network interface failure. Serviceguard monitors the network and
will perform a local LAN failover (transparent to CSS and RAC) if the
primary interface fails.
NOTE A package with the CLUSTER_INTERCONNECT_SUBNET parameter is
available for both Modular and Legacy packages. A package with this
parameter can be configured only when all nodes of the cluster are
running SGeRAC version A.11.18 or higher. For more information, see
the latest edition of the Managing Serviceguard Fourteenth Edition
user’s guide at http://docs.hp.com. -> High Availability.