Date: Fri, 6 Nov 2009 19:56:14 GMT From: Daniel Casner <dc@anybots.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/140346: High bandwidth use causes loss of wlan connection Message-ID: <200911061956.nA6JuEkb078856@www.freebsd.org> Resent-Message-ID: <200911062000.nA6K04HT099398@freefall.freebsd.org>
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>Number: 140346 >Category: misc >Synopsis: High bandwidth use causes loss of wlan connection >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Nov 06 20:00:04 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Daniel Casner >Release: 8.0-BETA3 >Organization: Anybots Inc. >Environment: 8.0-BETA3 FreeBSD 8.0-BETA3 #1: Mon Aug 31 08:58:35 PDT 2009 root@plutonium:/usr/obj/usr/src.RELENG_8/sys/GENERIC i386 >Description: 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. >How-To-Repeat: Set up a wireless connection, here is an example from my rc.conf wlans_rum0="wlan0" ifconfig_wlan0="ssid Anybots 10.10.10.27 netmask 255.255.255.0" defaultrouter="10.10.10.20" Mount an NFS partition, write a large file over NFS. The connection is usually lost fairly quickly. Running: 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. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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