After installing each software product, you must also install any required patches. For proper cluster operation, ensure that all cluster nodes maintain the same patch level.
For information about current required patches, see Patches and Required Firmware Levels in Sun Cluster Release Notes or consult your Sun service provider.
For general guidelines and procedures for applying patches, see Chapter 10, Patching Sun Cluster Software and Firmware, in Sun Cluster System Administration Guide for Solaris OS.