About the 2 macs and 1 linux on a LAN

[John F. Kohler]

Here is a posting from another user of kingston kne110tx/

http://www.tux.org/hypermail/linux-tulip/1999-Mar/0059.html

John

Mitchell Patenaude wrote:

> On Wed, Jul 19, 2000 at 11:11:32AM -0700, Mitchell Patenaude wrote:
> > P.S.  I haven't been following this in detail, but what I have gathered
> > is that you are trying to get a DEC tulip based NIC to be recognized
> > under RedHat.  The module loads, but doesn't ever work.  NIC works fine
> > under DOS.  Is that a fair summary?
>
> I went over to John's place after work last night. Here's what I found:
>
> Hard coding the IRQ in the conf.modules wasn't a good idea, so I removed
> that, and the module would load properly, and we got link light, etc.
> However, he's still not getting ping from the other machines on his
> home network.
>
> We verfied the cable/network port by swapping cables with working machine.
> So it's definately something about the card.
>
> The best clues I could find were:
>
> The lights on the LinkSys router showed that we had link, but it also
> showed 10 rather than 100, (the 100 light wasn't lit like it was for
> the two macs he had connected.)
>
> When I did a flood ping, a very few packets would get through.  There were
> about 5% showing up as errors, 1-2% showing up okay (though with ping
> times ranging from 2ms up to 47seconds (47000 ms).
>
> Tcpdump showed that arp was working, but only sporadically.
>
> tcpdump didn't find the echo_request packets from the other machines on
> the network.
>
> I got the tulip_diag and mii_diag programs, and they showed that the card
> thought it was running in MII 100 with full duplex.  (Interesting that
> the router didn't show the 100 light). I thought that the FD might be
> the problem, so I hard coded it to half duplex using the options=13 line
> in the /etc/conf.modules, but that didn't help, and may have hurt.
>
> I'm thinking it's probably an inabililty of the kingston (tulip) card
> to handshake properly with the router.  I would suspect a bad cable,
> but when we pulled it out from the back of the linux box and plugged it
> into his mac it worked fine.  When we plugged the cable from the working
> mac into the tulip card, it failed on the linux box, so the trouble is
> definately in the case.  I would suspect that the card itself it bad,
> but John says it was working fine at the install fest a few weeks back.
>
> Does anybody else have any things to try that we haven't already?
>
>   -- Mitch