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

network interfaces (LAN) that is transparent to applications utilizing User Datagram Protocol
(UDP) and Transport Control Protocol (TCP).
For virtual IP addresses (floating or package IP address) in Serviceguard, which also provides
remote failover capability of network connection endpoints between cluster nodes and transparent
local failover capability of network connection endpoints between redundant local network
interfaces.
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.
NOTE: srvctl and sqlplus are Oracle commands.
Manual Startup and Shutdown
Manual RAC instance startup and shutdown is supported through the following commands:
srvctl or sqlplus.
30 Serviceguard Configuration for Oracle 10g RAC