[eepro100] 80% packet drop on 100MB hub

Pedro Ribeiro pribeiro@isel.pt
Wed, 20 Dec 2000 10:50:22 -0000

Humm, this seems to be the tipical problem: "It works at 10Mbit/s but whem
plugged to any 100Mbit/s device with a cable longer then 5meters it doesn't
work ..." (a report from one of my students ...)

The tipical solution (if this is your case) is recheck the wiring of the
cable, if the correct twisted pairs aren't used the crosstalk is high and
probably causes both sides to detect collisions ... (at 10Mbit/s the same
problem happens but because de frequency is lower, the crosstalk is also
lower, lowering the frame errors, that's why the problem isn't very
noticable at 10BaseT).

Hope this helps.

Here goes a link with some wiring details.

Best Regards

  Pedro Ribeiro
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----- Original Message -----
From: "Will Sadler" <sadlerw@yahoo.com>
To: <eepro100@scyld.com>
Sent: Tuesday, December 19, 2000 7:07 PM
Subject: [eepro100] 80% packet drop on 100MB hub

> Hi,
> I've got a box that is at a remote ISP with RH6.2 and
> an 82559 PCI ethernet card.  When they plug it into
> their 100MB hub it starts dropping packets like crazy.
>  I'm guessing that the card isn't auto-detecting its
> settings correctly.  Can someone point me to a
> resource that has the latest driver and utilities to
> help debug this problem?
> Thanks,
> Will
> =====
> Will Sadler   sadlerw@yahoo.com 630.355.3868 630.747.5355 cell
312.822.1193 cna
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