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

NOTE: Serviceguard can not be responsible for networks or connection endpoints
that it is not configured to monitor.
SGeRAC Heartbeat Network
Serviceguard supports multiple heartbeat networks, private or public. Serviceguard
heartbeat network can be configured as a single network connection with redundant
LAN or multiple connections with multiple LANs (single or redundant).
CSS Heartbeat Network
The CSS IP addresses for peer communications are fixed IP addresses. When CSS
heartbeats are on a single network connection and does not support multiple heartbeat
networks. To protect against a network single point of failure, the CSS heartbeat network
should be configured with redundant physical networks under SGeRAC monitoring.
Since SGeRAC does not support heartbeat over Hyperfabric (HF) networks, the preferred
configuration is for CSS and Serviceguard to share the same cluster interconnect.
RAC Cluster Interconnect
Each set of RAC instances maintains peer communications on a single connection and
may not support multiple connections on HP-UX with SGeRAC. To protect against a
network single point of failure, the RAC cluster interconnect should be configured with
redundant networks under Serviceguard monitoring and for Serviceguard to take
action (either a local failover or an instance package shutdown, or both) if the RAC
cluster interconnect fails. Serviceguard does not monitor Hyperfabric networks directly
(integration of Serviceguard and HF/EMS monitor is supported).
Public Client Access
When the client connection endpoint (virtual or floating IP address) is configured using
Serviceguard packages, Serviceguard provides monitoring, local failover, and remote
failover capabilities. When Serviceguard packages are not used, Serviceguard does not
provide monitor or failover support.
RAC Instances
Automated Startup and Shutdown
CRS can be configured to automatically start, monitor, restart, and halt RAC instances.
If CRS is not configured to automatically start the RAC instance at Oracle Cluster
Software startup, the RAC instance startup can be automated through scripts using
supported commands, such as srvctl or sqlplus, in a SGeRAC package to start and
halt RAC instances.
RAC Instances 39