Validating Operating System Changes
The NNM system’s underlying operating system (OS) is not a static thing. The OS vendor makes changes to its code base for a variety of reasons, including to:
maintain a competitive advantage
comply with Y2K (still)
avoid obsolescence
patch coding errors
add new features
upgrade subsystems such as DNS or X-Windows
Before plunging ahead with an aggressive upgrade strategy, remember to verify that any OS upgrade is supported by NNM and your third-party applications. Be cautious here. You may find, for example, that a certain third-party application that loads under NNM 5.x refuses to load under NNM 6.x, but will continue to work if NNM 5.x is upgraded to NNM 6.x instead. Here, you are burning the candle at both ends ...
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