When upgrading Release 5 Directory Server to Release 5U1, consider the following aspects of the upgrade process:
General Upgrade Approach. The upgrade is achieved by patching Release 5 Directory Server.
Upgrade Dependencies. Directory Server has dependencies on a number of Java ES shared components, (see Table 1–8), of which CAC, MFWK, SJWC, and Security components (NSS,JSS,NSPR) need to be upgraded when you perform a maintenance upgrade of Directory Server.
Backward Compatibility. Release 5U1 Directory Server is backwardly compatible with the Release 5 version.
Upgrade Rollback. You can do a rollback of the Release 5 upgrade by reverting to the previous version, which is left intact by the upgrade.