If the DR remove-board operation pertains to a board containing an active cluster interconnect interface, Sun Cluster rejects the operation and identifies the interface that would be affected by the operation. You must use a Sun Cluster administrative tool to disable the active interface before the DR operation can succeed (also see the caution below).
See the Sun Cluster 3.1 System Administration Guide for detailed instructions on how to perform these actions.
Sun Cluster requires that each cluster node has at least one functioning path to every other cluster node. Do not disable a private interconnect interface that supports the last path to any cluster node.