Add this planning information to the "Cluster and Node Names Worksheet" in Sun Cluster 3.0 Release Notes.
Sun Cluster software uses the private network for internal communication between nodes. Sun Cluster requires at least two connections to the cluster interconnect on the private network. You specify the private network address and netmask when installing Sun Cluster software on the first node of the cluster. You can choose to accept the default private network address (172.16.0.0) and netmask (255.255.0.0), or type different choices if the default network address is already in use elsewhere in the enterprise.
After you have successfully installed the node as a cluster member, you cannot change the private network address and netmask.
If you specify a private network address other than the default, it must meet the following requirements.
Use zeroes for the last two octets of the address
Follow the guidelines in RFC 1597 for network address assignments
Refer to TCP/IP and Data Communications Administration Guide for instructions on obtaining copies of RFCs.
If you specify a netmask other than the default, it must meet the following requirements.
Minimally mask all bits given in the private network address
Have no "holes"