misc/140346: High bandwidth use causes loss of wlan connection
weongyo.jeong at gmail.com
Sun Nov 8 11:20:07 UTC 2009
The following reply was made to PR misc/140346; it has been noted by GNATS.
From: Weongyo Jeong <weongyo.jeong at gmail.com>
To: Daniel Casner <dc at anybots.com>
Cc: freebsd-gnats-submit at freebsd.org
Subject: Re: misc/140346: High bandwidth use causes loss of wlan connection
Date: Sun, 8 Nov 2009 02:46:04 -0800
On Fri, Nov 06, 2009 at 07:56:14PM +0000, Daniel Casner wrote:
> >Number: 140346
> >Category: misc
> >Synopsis: High bandwidth use causes loss of wlan connection
> >Confidential: no
> >Severity: critical
> >Priority: high
> >Responsible: freebsd-bugs
> >State: open
> >Class: sw-bug
> >Submitter-Id: current-users
> >Arrival-Date: Fri Nov 06 20:00:04 UTC 2009
> >Originator: Daniel Casner
> >Release: 8.0-BETA3
> Anybots Inc.
> 8.0-BETA3 FreeBSD 8.0-BETA3 #1: Mon Aug 31 08:58:35 PDT 2009 root at plutonium:/usr/obj/usr/src.RELENG_8/sys/GENERIC i386
> I am using a rum wireless card (Asus WL-167g) wireless card and creating a wlan virtual device from it to connect to a wireless network. This same card worked flawlessly under FreeBSD 7.
> The interface associates with wireless networks just fine, however, any time I try to push a large amount of data over the interface, such as writing a 100Mb file over NFS, the connection will die and not be restored.
> Setting "wlandebug state+scan" it appears that the wlan device is performing background scans and re-associating correctly, however, the operating system does not resume sending packets over the interface. I can not ping from the wireless device or ping it from the out side after the connection dies.
> Set up a wireless connection, here is an example from my rc.conf
> ifconfig_wlan0="ssid Anybots 10.10.10.27 netmask 255.255.255.0"
> Mount an NFS partition, write a large file over NFS.
> The connection is usually lost fairly quickly.
> ifconfig wlan0 down
> ifconfig wlan0 up scan
> Usually restores the connection, however, continuing to try and push a large amount of bandwidth will cause it to die again.
It looks it's a known issue and fixed at r198098. Could you please test
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