Using Serviceguard Extension for RAC Version A.11.20 - (August 2011)
monitoring CSS-HB subnet (Oracle Cluster Interconnect Subnet Package as shown in the package
configuration parameters examples below).
NOTE: Do not configure CLUSTER_INTERCONNECT_SUBNET in the RAC Instance package due
to the RAC-IC network being the same as CSS-HB network.
The following is an example of the relevant package configuration parameters:
Oracle Clusterware Package:
PACKAGE_NAME CRS_PACKAGE
PACKAGE_TYPE MULTI_NODE
LOCAL_LAN_FAILOVER_ALLOWED YES
NODE_FAIL_FAST_ENABLED NO
DEPENDENCY_NAME CI-PACKAGE
DEPENDENCY_CONDITION CI-PACKAGE=UP
DEPENDENCY_LOCATION SAME_NODE
Oracle Cluster Interconnect Subnet Package: Package to monitor the CSS-HB subnet
PACKAGE_NAME CI-PACKAGE
PACKAGE_TYPE MULTI_NODE
LOCAL_LAN_FAILOVER_ALLOWED YES
NODE_FAIL_FAST_ENABLED YES
CLUSTER_INTERCONNECT_SUBNET 192.168.1.0
NOTE: For information on guidelines to change certain Oracle Clusterware and Serviceguard
cluster configuration parameters, see “Guidelines for Changing Cluster Parameters” (page 39).
Alternate Configuration—Multiple RAC Databases
When there are multiple independent RAC databases on the same cluster, and if there is insufficient
bandwidth over a single network, a separate network can be used for different database interconnect
traffic. This will avoid RAC-IC traffic of one database from interfering with that of another.
Figure 9 RAC/RAC-IC Traffic Separation—Multiple Database Configuration
As shown in Figure 9, each primary and standby pair protects against a single failure. If the subnet
with SG-HB (lan1/lan2) fails, Serviceguard will resolve the subnet failure with a Serviceguard
cluster reconfiguration. If the 192.168.2.0 subnet (lan3 and lan4) fails, Oracle instance membership
recovery (IMR) will resolve the interconnect failure subnet, unless Serviceguard subnet monitoring
is used. Oracle will wait for IMR time interval prior to resolving the subnet failure. In SGeRAC
configurations, default value of IMR time interval may be as high as seventeen minutes.
CLUSTER_INTERCONNECT_SUBNET can be configured for RAC instance MNP to monitor the
RAC-IC subnet that is different from CSS-HB subnet. The parameter file (SPFILE or PFILE) for
RAC instances must have cluster_interconnects parameter defined, to hold IP address in
38 Serviceguard Configuration for Oracle 10g, 11gR1, or 11gR2 RAC