Using Serviceguard Extension for RAC, 7th Edition, September 2008

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 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. 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.

NOTE: Do not configure CLUSTER_INTERCONNECT_SUBNET in the RAC Instance package

since the RAC-IC network is the same as CSS-HB network.

Use a separate package to monitor the CSS-HB subnet alone and have Oracle Clusterware

multi-node package depend on the package monitoring the CSS-HB subnet.

NODE_FAIL_FAST_ENABLED will be set to NO for Oracle Clusterware package and will be set

to YESfor the package monitoring CSS-HB subnet (Oracle Cluster Interconnect Subnet package).

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 41)

Guidelines for Changing Cluster Parameters

This section describes the guidelines for changing the default values of certain Oracle clusterware

and Serviceguard cluster configuration parameters.

The guidelines vary depending on whether clustering interconnect subnet monitoring is used

to monitor the CSS HB subnet or not.

When Cluster Interconnect Subnet Monitoring is used

The Cluster Interconnect Subnet Monitoring feature is used to monitor the CSS-HB network and

if any of the following cluster parameters needs to be changed the default values of:

• Oracle Clusterware parameter CSS misscount

• Serviceguard cluster configuration parameter NODE_TIMEOUT

• Serviceguard HEARTBEAT_INTERVAL

Then the CSS misscount parameter should be the greater of either:

Cluster Communication Network Monitoring 41