Using Serviceguard Extension for RAC, 10th Edition, April 2013

with a CSS cluster reconfiguration. It will wait for the CSS misscount time interval before handling
the CSS-HB subnet failure (by bringing down the node on which the CSS-HB subnet has failed).
The default value of CSS misscount in SGeRAC configurations is 600 seconds.
As shown in Figure 8, CLUSTER_INTERCONNECT_SUBNET can be used in conjunction with the
NODE_FAIL_FAST_ENABLED package configuration parameter to monitor the CSS-HB network.
A failure of CSS-HB subnet on a node should be handled by bringing down that node. Therefore,
set NODE_FAIL_FAST_ENABLED to YES for the package monitoring the CSS-HB subnet. If the
monitored subnet fails, the failure of the CSS-HB subnet on a node will bring down the instance of
the multi-node package and the node where the subnet has failed (When Oracle Clusterware is
configured as a multi-node package and CLUSTER_INTERCONNECT_SUBNET is used to monitor
the CSS-HB subnet).
A failure of CSS-HB subnet on all nodes will result in the multi-node package failing on the nodes
one by one (resulting in that node going down), and one instance of the multi-node package and
node will remain providing services to the clients.
Use a separate package to monitor only the CSS-HB subnet and have Oracle Clusterware multi-node
package depend on the package monitoring the CSS-HB subnet. The NODE_FAIL_FAST_ENABLED
parameter is set to NO for the Oracle Clusterware package, and is set to YES for the package
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 40).
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.
Cluster Communication Network Monitoring 39