misc/140346: High bandwidth use causes loss of wlan connection
dc at anybots.com
Fri Nov 6 20:00:05 UTC 2009
>Synopsis: High bandwidth use causes loss of wlan connection
>Arrival-Date: Fri Nov 06 20:00:04 UTC 2009
>Originator: Daniel Casner
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.
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