The following is a list of requirements for the private network configuration:

• The private network connection names must be different from the network connection names used for the public network.

• Each node's private interface for interconnects must be on the same subnet.

  For example, if the private interfaces have a subnet mask of 255.255.255.0, then your private network is in the range 192.168.0.0--192.168.0.255, and your private addresses must be in the range of 192.168.0.[0-255]. If the private interfaces have a subnet mask of 255.255.0.0, then your private addresses can be in the range of 192.168.[0-255].[0-255]

• The private network connection name cannot contain any multibyte language characters. The private network connection names are case-sensitive.

• Both IPv4 and IPv6 addresses are supported.

• If you use OUI to install Oracle Grid Infrastructure, then the private network connection names associated with the private network adapters must be the same on all nodes.

  For example, if you have a two-node cluster, and PrivNIC is the private network connection name for node1, then PrivNIC must be the private network connection name for node2.

• For the private network, the network adapters must use high-speed network adapters and switches that support UDP, TCP/IP (minimum requirement is 1 Gigabit Ethernet, 10GbE recommended). Alternatively, use InfiniBand for the interconnect.

  Note:

  UDP or TCP is the interconnect protocol for Oracle Clusterware. You must use a switch for the interconnect. Oracle recommends that you use a dedicated switch.

  Oracle does not support token-rings or crossover cables for the interconnect.

• For the private network adapters, the endpoints of all designated network connection names must be completely reachable on the network. There should be no node that is not connected to every other node on the private network. You can test if an interconnect interface is reachable using ping.