IPP Mail Archive: IPP> Bake-Off 3 results status

IPP Mail Archive: IPP> Bake-Off 3 results status

IPP> Bake-Off 3 results status

From: Zehler, Peter (Peter.Zehler@usa.xerox.com)
Date: Tue Oct 24 2000 - 15:38:32 EDT

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    I am well on my way to documenting all the results from the Bake-Off. I
    will be out of the office on Wednesday and expect to have the documents
    completed by Thursday. I will send the complete results to the registered
    participants and the summary document out to the group at large on Thursday.
    I will also be sending out each issue captured at the Bake-Off in separate
    mail notes by Thursday also.

    For those of you that did not attend the Bake-Off was, as usual, a
    tremendous help to the participating implementers. Getting that many
    Clients and Printers into one room with all the expertise needed to
    troubleshoot any glitches is immensely beneficial. Oak Technologies did a
    wonderful job hosting the event. The firewalls and proxies that
    participated performed flawlessly allowing us control over IPP traffic
    through them. We saw no interactions between the proxies and any security

    Below is a sneak peek at the beginning of the IPP Bake-Off Summary Document.


    Participating companies: Axent Technologies Inc., Canon, Electronics for
    Imaging Inc., Epson, IBM, i-data International, Japan Computer Industry,
    McAfee.com, Microsoft, Netreon Inc., NETsilicon Inc., Novell, Oak
    Technologies, Quality Logic, Ricoh, SEH Computertechnik Gmbh, Xerox

    The 18 participants provided 17 IPP Printers, 9 IPP Clients, 2 firewalls and
    2 HTTP Proxies. Out of the 153 possible IPP Client/Printer combinations,
    151 were tested.
            * The overall success rate was 93%.
            * Limiting the scope to IPP v1.1 only provided a success rate
    of 96%.
            * With IPP v1.0 Clients and v1.1 Printers the success rate was
            * The tests with v1.1 Clients and v1.0 Printers resulted in a
    success rate of 31% which is not suprising given that some printer
    implementations explicitly disallowed that combination. Some Clients were
    able to retry in v1.0 mode raising the success rate to 69%. It should also
    be noted that for v1.0 Printers that allow v1.1 Clients the success rate was

    The majority of the failures can be attributed to one of two causes. The
    major cause of unresolved failures was due to IPP Clients that had problems
    with IPP Printers that sent unexpected HTTP "100 continue" messages. This
    was recognized as an implementation error. The other cause was v1.0
    Printers that explicitly disallowed v1.1 Clients. IPP inherently provides a
    mechanism that allows minor version mismatches to be gracefully handled.
    The minor version mismatch was recognized as an unecessary printer


                                    Peter Zehler
                                    Xerox Architecture Center
                                    Email: Peter.Zehler@usa.xerox.com
                                    Voice: (716) 265-8755
                                    FAX: (716) 265-8792
                                    US Mail: Peter Zehler
                                            Xerox Corp.
                                            800 Phillips Rd.
                                            M/S 139-05A
                                            Webster NY, 14580-9701

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