You must maintain at least one public network connection for each node in the cluster. The cluster is inaccessible without a public network connection.
Removing public network connections from a node in a cluster is no different than doing so in a non-cluster environment. For procedures related to administering public network connections, see Sun Cluster 3.0 System Administration Guide.
For instructions on removing public network connections, see the hardware documentation that shipped with your node and public network connection devices.