Using Serviceguard Extension for RAC, 6th Edition, April 2008

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 Fifteenth Edition
user’s guide at http://docs.hp.com. -> High Availability.
Figure 2-1 Single Network for Cluster Communications
Alternate Configuration - Fast Reconfiguration with Low Node Timeout
A high RAC-IC traffic may interfere with SG-HB traffic and cause unneccessary node
timeouts if Serviceguard cluster configuration parameter NODE_TIMEOUT is low. If
NODE_TIMEOUT cannot be increased, use of an additional network dedicated for SG-HB
alone avoids unnecessary node timeouts when RAC-IC traffic is high. This configuration
is for a cluster with two or more nodes that have high RAC-IC traffic and need fast
failover (a low value for Serviceguard configuration parameter NODE_TIMEOUT).
48 Serviceguard Configuration for Oracle 10g RAC