Using Serviceguard Extension for RAC, 5th Edition, June 2007

Serviceguard Configuration for Oracle 10g RAC
Cluster Communication Network Monitoring
Chapter 2 67
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.
Figure 2-3 RAC/RAC-IC Traffic Separation – Multiple Database
Configuration
As shown in Figure 2-3, each primary and standby pair protects against
a single failure. If the subnet with SG-HB (lan1/lan2) fails, Serviceguard
will resolve the subnet failure with a Serviceguard cluster
reconfiguration. If the 192.168.2.0 subnet (lan3 and lan4) fails, Oracle
instance membership recovery (IMR) will resolve the interconnect failure
subnet, unless Serviceguard subnet monitoring is used. Oracle will wait