Date: Sat, 19 Jun 2004 18:55:47 GMT From: Suihong Liang <s2liang@uwaterloo.ca> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/68117: serious network collisions after NIC "media/mediaopt" change Message-ID: <200406191855.i5JItlhX004471@www.freebsd.org> Resent-Message-ID: <200406191900.i5JJ0X3a011776@freefall.freebsd.org>
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>Number: 68117
>Category: i386
>Synopsis: serious network collisions after NIC "media/mediaopt" change
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jun 19 19:00:33 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Suihong Liang
>Release: 5.2.1
>Organization:
University of Waterloo
>Environment:
FreeBSD hurricane.cs.uwaterloo.ca 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #1: Thu Jun 17 13:09:16 GMT 2004 root@hurricane.cs.uwaterloo.ca:/usr/src/sys/i386/compile/REAL i386
>Description:
If the NIC's media/mediaopt is ever changed, then start a file transfer, there will be lots of network collision (~75%) reported by netstat. The collisions were also confirmed by the Netgear FS524 switch.
The NIC I have tried are: em0, rl0.
Note that same hardware configuration under Linux 2.6 works smoothly.
>How-To-Repeat:
ifconfig em0 media 10baseT/UTP mediaopt half-duplex (or full-duplex)
then scp a big file.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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