Ethernet AB Switch

2007-12-25 7:26:00

Dear Sun-managers,

Thank you for your responses on the issue of using an A-B switch for

an Ethernet. To clarify and apologize for the unclearness of my original

question.

    1) Although I did not mention it, the machine in question is a SS2

    running SunOS 4.1.

    2) The connection will be over UTP using a thick Ethernet to UTP

    transceiver.

    3) This is a stopgap measure (oh! what a surprise :-)), but there

    is concern about security, thus the issue of not allowing simultaneous

    connectivity (despite the fact that the machine does not have SunLink

    IR).

    4) This is on an internal TCP/IP network, thus any damage due to mis

    configured addresses should remain within the company...

However, on to the comments that people had:

Several people brought some electrical problems that might occur.

In fact one person pointed out that this is a violation of the

Ethernet specs.

Aside from electrical considerations, the overall consensus seemed

to be that this is a BAD idea and that any short term gains are

far outweighed by the long term mess that it creates. Although it

is technically possible (albeit with reboots).

My feeling is that we already have IP level gateways, we should be

connecting machines using those and not some sort of jimmy-rigged

solution.

I will happily email the entire stack of messages to anybody who

is interested in the subject, please contact me at the address listed

below.

The contributors and interested parties that I had heard from by the

time of this writing were:

        "Andrew Luebker" <uunet!eye.psych.umn.edu!aahvdl>

        uunet!ica.philips.nl!geertj (Geert Jan de Groot)

        uunet!itd.dsto.oz.au!dam (Damian Marriott)

        uunet!zia.AOC.NRAO.EDU!pgreen (Philip Green)

        uunet!fsg.com!chuck (Chuck Yerkes)

        uunet!mcc.com!vasey (Ron Vasey)

        uunet!roke.rap.ucar.EDU!tres (Tres Hofmeister)

        uunet!pex.eecs.nwu.edu!phil (William LeFebvre)

        uunet!roentgen.RadOnc.Duke.EDU!antoine

        uunet!juliet.ll.mit.edu!mikem ( Michael Maciolek)

        Charles Finnell <uunet!lear.mitre.org!finnell>

        uunet!odi.com!keith

        

Thank you, I appreciate your time and effort.

Nicholas Jacobs

nick@ml.com, uunet!toro!nick, 212 449 1455

Merrill Lynch & Municipal

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