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Date:      Wed, 20 Nov 2002 13:45:26 +0100
From:      =?iso-8859-1?Q?Sten_Daniel_S=F8rsdal?= <sten.daniel.sorsdal@wan.no>
To:        "Randall Stewart" <randall@stewart.chicago.il.us>, "shubha mr" <shubha_mr@yahoo.com>
Cc:        <freebsd-questions@FreeBSD.ORG>, <freebsd-net@FreeBSD.ORG>
Subject:   RE: duplicate packets in ping?
Message-ID:  <0AF1BBDF1218F14E9B4CCE414744E70F07D1C5@exchange.wan.no>

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I've had similar issue with Intel Ethernet controllers (i82562ET and =
i82801BA/BAM).
It was practically no load, and on the wire there was no duplicates but =
ping got duplicates anyway. - It only happens sporadically and it =
happens to about 10 boxes with the same FreeBSD version (exact same).
Havent had the chance to dig into it though....
Same with you?

-----Original Message-----
From: Randall Stewart [mailto:randall@stewart.chicago.il.us]=20
Sent: 20. november 2002 13:34
To: shubha mr
Cc: freebsd-questions@FreeBSD.ORG; freebsd-net@FreeBSD.ORG
Subject: Re: duplicate packets in ping?


shubha mr wrote:
> Ping on my device driver (for my NIC )gives duplicate packets.does=20
> anyone know why they occur and how to eliminate them?
> thanks
> shubha
>=20
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>=20

I have noticed a similar occurance in some of my SCTP testing with all =
of the BSD's. In particular the linksys pcmcia cards seem to do this. In =
my testing and analysis this always seems to occur when the card is busy =
and what happens is you lose some packet and another appears to be =
duplicated... I traced this out with ethereal a while ago and then just =
stopped using that card when I figured out it was some sort of circular =
buffer issue.. I did not dig in and find out if it was the card or =
driver... I rather suspect it is the card (since it is a low end one).. =
but one never knows...

R

--=20
Randall R. Stewart
randall@stewart.chicago.il.us 815-342-5222 (cell phone)


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