Date: Mon, 31 May 2004 12:33:49 -0400 From: Chuck Swiger <cswiger@mac.com> To: Technical Director <technical@server1.ultratrends.com> Cc: questions@FreeBSD.ORG Subject: Re: 3Com 3c905B-TX Fast EtherLink XL Packet Loss Message-ID: <40BB5E6D.3050408@mac.com> In-Reply-To: <20040530224910.S980@server1.ultratrends.com> References: <20040530224910.S980@server1.ultratrends.com>
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Technical Director wrote:
[ ... ]
> 3Com 3c905B-TX showing up as xl0
>
> plugged in using a etl certified (whooie) cat-5e to:
>
> Linksys EtherFast 4116
>
> Using ping -f /{some address}/, I've noticed at these configured speeds
> the following:
>
> 10baseT/UTP half-duplex == 11% packet loss
> 10baseT/UTP full-duplex == 30% packet loss
> 100baseTX half-duplex == 70-80% packet loss
> 100baseTX full-duplex == 95-99% packet loss
Some older cards simply won't handle the data rate of a flood ping; if you can
do something like:
ping -s 1000 -i 0.001 _address_
...without packet loss, it's probably fine to use for normal purposes. The
only other response I can think to give is to try swapping in a high-end card
like a fxp.
--
-Chuck
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