Re: Connection breaks frequently with Connection Sharing (3G to WLAN)



On Tue, 2009-01-20 at 17:48 +0200, Juhani Jaakola wrote:
> I have a PC with A-Link WL54H WLAN card (driver rt2500pci) and a USB 3G modem. I connect to the Internet via the 3G modem and I want to share that connection with other PCs via WLAN. I'm running Fedora 10.
> 
> I connected to Internet with "Auto GSM network connection". Then I chose "Create New Wireless Network..." to share the 3G connection to other PCs with WLAN. I created a network with security NONE. Then I connect to the new ad hoc WLAN network from ThinkPad with Windows XP SP3.
> 
> My problem is that the WLAN connection to the ThinkPad breaks very frequently. Last hour the connection broke 13 times! This is what I get in /var/log/messages:

When you say "break", what exactly is that behavior?  The logs don't
look out of the ordinary.  I suspect some of the mac80211 "IBSS merging"
behavior, but it's too early to say for sure.  The driver doesn't look
like it's sending disconnection events, so unless the driver is jumping
channels due to the IBSS merging behavior it shouldn't interrupt the
connection.

dan

> --- begin of /var/log/messages ---
> Jan 20 16:45:29 tik NetworkManager: <info>  (wlan0): supplicant connection state:  completed -> associated
> Jan 20 16:45:29 tik NetworkManager: <info>  (wlan0): supplicant connection state:  associated -> completed
> Jan 20 16:45:32 tik dnsmasq[3661]: DHCPDISCOVER(wlan0) 00:16:6f:05:8e:88 
> Jan 20 16:45:32 tik dnsmasq[3661]: DHCPOFFER(wlan0) 10.42.43.10 00:16:6f:05:8e:88 
> Jan 20 16:45:32 tik dnsmasq[3661]: Ignoring domain foo-domain.net for DHCP host name otherpc
> Jan 20 16:45:32 tik dnsmasq[3661]: DHCPREQUEST(wlan0) 10.42.43.10 00:16:6f:05:8e:88 
> Jan 20 16:45:32 tik dnsmasq[3661]: DHCPACK(wlan0) 10.42.43.10 00:16:6f:05:8e:88 otherpc
> Jan 20 16:46:53 tik NetworkManager: <info>  (wlan0): supplicant connection state:  completed -> associated
> Jan 20 16:46:53 tik NetworkManager: <info>  (wlan0): supplicant connection state:  associated -> completed
> Jan 20 16:48:18 tik dnsmasq[3661]: DHCPRELEASE(wlan0) 10.42.43.10 00:16:6f:05:8e:88 
> Jan 20 16:48:40 tik dnsmasq[3661]: DHCPDISCOVER(wlan0) 00:16:6f:05:8e:88 
> Jan 20 16:48:40 tik dnsmasq[3661]: DHCPOFFER(wlan0) 10.42.43.10 00:16:6f:05:8e:88 
> Jan 20 16:48:40 tik dnsmasq[3661]: Ignoring domain foo-domain.net for DHCP host name otherpc
> Jan 20 16:48:40 tik dnsmasq[3661]: DHCPREQUEST(wlan0) 10.42.43.10 00:16:6f:05:8e:88 
> Jan 20 16:48:40 tik dnsmasq[3661]: DHCPACK(wlan0) 10.42.43.10 00:16:6f:05:8e:88 otherpc
> --- end of /var/log/messages ---
> 
> And /var/log/wpa_supplicant.log contains the following lines repeated many times:
> 
> --- begin of quote ---
> Associated with 02:16:6f:10:ef:33
> CTRL-EVENT-CONNECTED - Connection to 02:16:6f:10:ef:33 completed (reauth) [id=0 id_str=]
> --- end of quote ---
> 
> ps -ef shows the following arguments for the key processes:
> 
> NetworkManager --pid-file=/var/run/NetworkManager/NetworkManager.pid
> 
> /usr/sbin/pppd nodetach lock nodefaultroute ttyUSB0 noipdefault usepeerdns lcp-echo-failure 0 lcp-echo-interval 0 ipparam /org/freedesktop/NetworkManager/PPP/0 plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so
> 
> /usr/sbin/dnsmasq --no-hosts --keep-in-foreground --bind-interfaces --no-poll --except-interface=lo --listen-address=10.42.43.1 --dhcp-range=10.42.43.10,10.42.43.100,60m --dhcp-option=option:router,10.42.43.1 --dhcp-lease-max=50 --pid-file=/var/run/nm-dnsmasq-wlan0.pid
> 
> /usr/sbin/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -u -f /var/log/wpa_supplicant.log
> 
> My versions are:
> 
> kernel-2.6.27.9-159.fc10.i686
> NetworkManager-0.7.0-1.git20090102.fc10.i386
> dnsmasq-2.45-1.fc10.i386
> wpa_supplicant-0.6.4-2.fc10.i386
> 
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