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

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.
• First network with primary for SG-HB #1 (lan1).
• Second network with primary for SG-HB #2 (lan2).
• Third network with primary and standby for CSS-HB and RAC-IC (lan3/lan4).
• Single failure is protected by primary/standby.
If the subnet with CSS-HB fails, unless subnet monitoring is used, CSS will resolve the
interconnect subnet failure with a CSS cluster reconfiguration. CSS will wait for CSS
misscount time interval (Oracle Clusterware configuration parameter) before handling
the CSS-HB subnet failure. The default value of CSS misscount in SGeRAC
configurations is 600 seconds.
CLUSTER_INTERCONNECT_SUBNET can be used in conjunction with the
NODE_FAIL_FAST_ENABLED option to monitor the CSS-HB network. A failure of
CSS-HB subnet on a node should be handled by bringing down that node. Thus, set
NODE_FAIL_FAST_ENABLED to YES for the package monitoring the CSS-HB subnet.
When Oracle Clusterware is configured as a multi-node package and
CLUSTER_INTERCONNECT_SUBNETis used to monitor the CSS-HB subnet, the failure
52 Serviceguard Configuration for Oracle 10g RAC