Program updates come to you as RPM packages. You can update the version of CSM on either the management server or a node. Note, however, that the version of CSM on the management server must always be at the same, or more recent level than any other version of CSM installed on a cluster node.
You can install any package that has a version level of 1.2.0.* (where * can be any value). To determine the version of a particular package that is installed on your system, use the rpm command (rpm -q packagename). For example:
rpm -q csm.core