Date: Sun, 26 Aug 2001 13:03:47 -0400 From: Brian Reichert <reichert@numachi.com> To: Harry Putnam <reader@newsguy.com> Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: Frustrating network problem - need diagnotic help Message-ID: <20010826130347.A81961@numachi.com> In-Reply-To: <m1lmk79b8l.fsf@reader.newsguy.com>; from reader@newsguy.com on Sun, Aug 26, 2001 at 06:55:38AM -0700 References: <m1snefa17h.fsf@reader.newsguy.com> <20010826014336.Y81961@numachi.com> <m1lmk79b8l.fsf@reader.newsguy.com>
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On Sun, Aug 26, 2001 at 06:55:38AM -0700, Harry Putnam wrote:
> How does one tell if it is a bogus MAC address?
I initially had to cheat, and look at how Windows probed that card,
for in that OS, it worked. Ultimately, I researched the fields of
the MAC address and found that:
- From your supplied URL, the vendor is [Toshiba America]
[3COM/NoteWorthy 56K Modem]
Comparing the first three bytes or your MAC 01:d4:ff:03:00:20 against any
MAC vendor list implies a mismatch:
<http://map-ne.com/Ethernet/vendor.html>;
<http://standards.ieee.org/regauth/ethertype/type-pub.html>;
- Although, for the life of me I can't reaconstruct the research,
I recall learning that that list bit of the MAC address must be
'1', otherwise, it's interpreted as a multicast address. (Which
only makes sense in a destination address, not a source address,
which it what your card's MAC will be used for.)
> What do you mean by
> `certain' above? There were some tcp connections you could not make?
I whined to -mobile and -isp, with some feedback. Look for these
subjects:
'linksys vs cisco'
'LinkSys NP100 vs the universe'
No solutions are discussed, but I go into great detail of the
sypmtoms I was seeing in different environments.
In my case, though, it came down to a buggy ed driver in FreeBSD
4.0-RELEASE, when 4.1 came out I uprgaded, and voila! I had a
working NIC.
--
Brian 'you Bastard' Reichert <reichert@numachi.com>
37 Crystal Ave. #303 Daytime number: (603) 434-6842
Derry NH 03038-1713 USA Intel architecture: the left-hand path
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