Physically installing public network adapters to a node in a cluster is no different from adding public network adapters in a noncluster environment.
For the procedure about how to add public network adapters, see the documentation that shipped with your nodes and public network adapters.
Install the cluster software and configure the public network hardware after you have installed all other hardware. To review the task map about how to install cluster hardware, see Installing Oracle Solaris Cluster Hardware.
If your network uses jumbo frames, review the requirements in Public Network Hardware: Requirements When Using Jumbo Frames and see the Sun GigaSwift documentation for information about how to configure jumbo frames.