Network architecture for Oracle 11g RAC
The Oracle 11g RAC technology places a lot of responsibility on the network layer within the data center; it requires a high-performing public as well as private network to deliver the optimal rate of scalability, performance, and availability. As the data within an RAC environment must pass across the interconnect network interfaces, you will need to size and tune the network interfaces accordingly or suffer from performance issues within your 11g RAC environments.
The private network and the Oracle 11g RAC interconnect
The interconnect functions as a network device as part of the private network between cluster nodes in an Oracle 11g RAC configuration. Its purpose is to transfer Oracle data between nodes ...