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Date:      Fri, 01 Mar 2002 11:42:38 +0000
From:      Bob Bishop <rb@gid.co.uk>
To:        "Crist J. Clark" <cjc@FreeBSD.ORG>, freebsd-bugs@FreeBSD.ORG
Subject:   Re: kern/35442: Problem transmitting runts in if_sis driver (with patch for fix)
Message-ID:  <4.3.2.7.2.20020301114109.00c2cef0@gid.co.uk>
In-Reply-To: <200203010750.g217o3e64107@freefall.freebsd.org>

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Hi,

At 23:50 28/02/02 -0800, Crist J. Clark wrote:
>  > Packets that are less than the 60 byte minimum for ethernet
>  > are transmitting with trailing 1 bits (this shows up at 0xff
>  > in ethereal/tcpdump) instead of trailing 0 bits.  This is the
>  > way the chip (National Semiconductor DP83815) interprets
>  > auto-padding.
>
>  Uh, so? Why do you feel that these need to be zeroed?

Careful: I think the packet is being transmitted short and the intervening 
switch supplies the trailing 1s.

--
Bob Bishop		    +44 (0)118 977 4017
rb@gid.co.uk		fax +44 (0)118 989 4254


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