[Voyage-linux] Basic Wifi problem

[Adrian Reyer]

Hello Matt,

On Thu, May 05, 2011 at 09:53:20PM -0700, Big Booger wrote:
> I assume it is the wifi address), but when I disconnect the ethernet cable my 
> connection through the wifi address is disabled.  Does anyone have any insight 
> into what is going on here?  I would like to have this alix board supply my DAC 

Basically this is a problem I face on my laptop as well.
You have 2 interfaces pointing to the same network, this makes 2 routes
to the same network via sepertae interfaces. They are ordered in some
way, you will find out with 'route -n'
The kernel always uses the first matching route it finds. So if your
ethernet-route ist the first interface, no matter what way the packets
came in, they will leave via the ethernet interface.
A bridge would be a solution, unfortunately you can't bridge
wlan-interfaces in most cases.
Another solution is to take interfaces up and down automatically. If the
cable detection works fine in your setup, you can just edit
/etc/network/interfaces and replace
auto eth0
by
allow-hotplug eth0
Be aware, if you now do /etc/init.d/networking restart your interface
will go down and *not* come up again as the hotplug event is missing.
Manually using 'ifup eth0' will work, though.
allow-hotplug should work with wpa_supplicant as well for your wlan
interface, I'd start with eth0 only, as I tend and encounter
problems with wlan and hotplugging.

Regards,
	Adrian
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