*BSD News Article 91079


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From: sthaug@nethelp.no (Steinar Haug)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: 100BaseT ?
Date: 14 Mar 1997 07:20:17 GMT
Organization: Nethelp Consulting, Trondheim, Norway
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Message-ID: <5gau7h$57e@verdi.nethelp.no>
References: <3328C157.41C67EA6@dnrc.bell-labs.com>
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In-reply-to: Bernhard Suter's message of Thu, 13 Mar 1997 22:09:11 -0500
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37064

[Bernhard Suter]

|   Is anybody using 100BaseT ethernet with FreeBSD? Some of the supported
|   ethernet cards are 10/100 (fxp0 - Intel EtherExpress Pro/100, de0 - DEC
|   DC21140, vx0 - 3Com 3c590). Shouldn't they autonegotiate to 100BaseT
|   when connected to a 100BaseT network? I have tried to connect two
|   FreeBSD 2.1.5 machines with Intel and DEC chip based cards with an
|   ethernet X-wire - the 100 LED goes on but packets cannot be transmitted
|   without errors. (seems like some PHY config problem in the driver...)

100BaseTX with a hub seems to work just fine. I've had trouble getting it
to work with just a crossover cable lately though...

|   Is it correct that fast ethernet hosts should only use the "standard"
|   IEEE 802.2 encapsulation (RFC 1042) and not the classical Ethernet
|   ecapsulation (RFC 894)?

No. And in fact the classical Ethernet encapsulation (type code in bytes
13-14) is now an official part of 802.3.

|   Is this beeing observed by other OS?

No. All the ones I've seen use the classical Ethernet encapsulation for
IP.

|   As far as I
|   can see, the Ethernet sublayer in FreeBSD only supports the RFC 894
|   style encapsulation for IP. If this is a problem are there any fixes?

It's not a problem.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no