Date: Thu, 28 Feb 2002 23:50:03 -0800 (PST) From: "Crist J. Clark" <cjc@FreeBSD.ORG> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/35442: Problem transmitting runts in if_sis driver (with patch for fix) Message-ID: <200203010750.g217o3e64107@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR kern/35442; it has been noted by GNATS.
From: "Crist J. Clark" <cjc@FreeBSD.ORG>
To: "George V. Neville-Neil" <gnn@neville-neil.com>
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: kern/35442: Problem transmitting runts in if_sis driver (with patch for fix)
Date: Thu, 28 Feb 2002 23:46:15 -0800
On Thu, Feb 28, 2002 at 10:55:47PM -0800, George V. Neville-Neil wrote:
[snip]
> 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?
I am not aware of any standard demanding this. I've seen about every
type of behavior you can imagine in the extra space, zeros, ones,
regular patterns (0x0a0a...), pieces of the last packet (the memory
was not cleared), and junk I never figured out.
--
Crist J. Clark | cjclark@alum.mit.edu
| cjclark@jhu.edu
http://people.freebsd.org/~cjc/ | cjc@freebsd.org
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200203010750.g217o3e64107>