Using Serviceguard Extension for RAC, 3rd Edition, May 2006

Serviceguard Configuration for Oracle 10g RAC
Interface Areas
Chapter 238
Network Monitoring
SGeRAC cluster provides network monitoring. For networks that are
redundant and monitored by Serviceguard cluster, Serviceguard cluster
provides local failover capability between local 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, Serviceguard 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