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

Serviceguard Configuration for Oracle 10g RAC
Cluster Communication Network Monitoring
Chapter 2 69
Faster Failover Configuration (SGeFF and SGeRAC)
Faster Failover configurations with SGeFF require at least two separate
SG-HB networks, and are restricted to two nodes.
Figure 2-4 Faster Failover Configuration
As shown in Figure 2-4, the Faster Failover configuration uses two
SG-HBs on two primary networks with no standby, which enables the
quickest determination of node failure and faster failover.