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Date: Sat, 3 Nov 2001 12:23:19 -0800 (PST)
From: Daniel Rudy <dcrudy@aol.com>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/31737: Network performance is <16Kbps using a full-duplex 100mbit lan 
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>Number:         31737
>Category:       kern
>Synopsis:       Network performance is <16Kbps using a full-duplex 100mbit lan
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Nov 03 12:30:02 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Rudy
>Release:        4.4-STABLE 10.29.2001
>Organization:
None
>Environment:
FreeBSD strata.pacbell.net 4.4-STABLE FreeBSD 4.4-STABLE #0: Mon Oct 29 09:12:31 PST 2001
root@strata.pacbell.net:/usr/src/sys/compile/STRATA  i386
>Description:
Network perfomance is non-existant while using a 100 MegaBit/sec LAN
under Full-Duplex mode.  Network stalls during ANY file transfer when
the file size exceeds around 60K including FTP and NFS.  Machines that
use other platforms, such as Microsoft Windows 98, Windows 2000, etc.,
also experiance the same problem when connecting ONLY to FreeBSD
machines, but work fine when connecting to any machine that is not
FreeBSD based.  This problem was not apparent in 4.2.
>How-To-Repeat:
Set network transfer mode to 100mbps Full-Duplex and try to transfer
a large file which is >500KB.
>Fix:
Uknown at this time.  Problem seems to be in the networking subsystem.
Considering that changing to half duplex fixes the problem, the problem
is probably at the interface point betwen the network subsystem and the
network interface card device driver.
>Release-Note:
>Audit-Trail:
>Unformatted:

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