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- Path: sparky!uunet!think.com!spdcc!Cthulhu!ralph
- From: ics.ralph@Control.Com (Ralph Mackiewicz)
- Newsgroups: comp.protocols.iso
- Subject: OSI Failure? (MMS and TCP/IP)
- Message-ID: <J0aFqB1w164w@Control.Com>
- Date: 1 Sep 92 12:59:18 GMT
- Sender: ics@Control.COM
- Reply-To: ics.ralph@control.com
- Organization: Industrial Computing Society
- Lines: 33
-
- Response to Andrew McRae posting of 30 August 92:
-
- Thank you for restating my position more eloquently. Your point about
- the fact that TCP/IP doesn't address the same types of issues that MMS
- does is what I was trying to get across. The reason I am writing about
- these issues is that I see many people who are hopelessly negative about
- all aspects of OSI and forget that there is some value. The OSI process
- resulted in an application standard that addressed manufacturing issues.
- This is one area of OSI where OSI solves real problems and is useful.
- TCP/IP, and its associated application layer protocols (FTP, etc.) do not
- address these issues. Therefore, OSI has value in spite of the fact that
- Novell and FTP provide better file sharing mechanisms.
-
- You are right in pointing out that there is no technical reason why MMS
- cannot be run over TCP/IP (RFC1006 specifies how to run OSI application
- protocols over TCP). However, all MMS implementations to date have been
- using OSI transport stacks. We have a version of MMS that will run over
- TCP/IP in the Sun SPARC environment (SunNet OSI). Unfortunately, we are
- the only ones offering this....there is no one else to talk to. On the
- OSI side there are many products available with MMS. This fact alone
- makes MMS over OSI more suitable for most systems.
-
- I will also concede that OSI transport technology requires more processing
- and memory than TCP/IP and this can be a problem in many systems that are
- short of these resources. I also believe that over time this will improve
- to the point where it may not be an issue. The improvement will come in
- the form of better OSI implementations and better computing platforms.
- This is where we are putting our efforts because we just do not see any
- support for widespread use of MMS over TCP/IP (I apologize in advance for
- the use of the word "better" here).
-
- Ralph Mackiewicz, SISCO Inc.
- 2943439@mcimail.com or ics.ralph@ics.org
-