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Re: KVM Bridge wlan0



	Hi.

Please refrain from top-posting.
Please do not CC me, I'm subscribed to the list.

On Sun, 6 Mar 2016 14:05:32 -0500
Timothy Marion <timothy.marion@marion.systems> wrote:

> I do not know that I want to bridge eth0 to wlan0.

You have it anyway in the current configuration.


> I have one working interface on my computer wlan0. 

Er, your 'ifconfig' list says otherwise. At the very least you have a
wired interface called eth0. It's irrelevant to the current problem,
though.


> I want a virtual machine using KVM to be able to communicate to the
internet using wlan0. 

There are multiple ways of doing it. Bridge, NAT, tunnels, you name it.


> All documentation I can find indicates that is done with a bridge. 

Because it's the simpliest way to accomplish such connectivity. But
about the only *real* need to use a bridge arises if you need the
outside world to communicate with your VM. As in - you need someone to
establish inbound connections to your VM with the minimal hassle.


> All documentation I can find indicates you do this
with eth0. I do not use eth0. I have wlan0.

Got it.


> good new! I now have br0 with eth0 and wlan0.

Just as planned.


> bad new! now the laptop no longer has any internet connectivity.

Which is clearly shown by this (note NO-CARRIER):

> 2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast master br0 state DOWN mode DEFAULT group default qlen 1000
>     link/ether 2c:60:0c:2f:be:18 brd ff:ff:ff:ff:ff:ff
> 3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br0 state DOWN mode DORMANT group default qlen 1000
>     link/ether ac:b5:7d:3d:18:df brd ff:ff:ff:ff:ff:ff
> 4: br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
>     link/ether 2c:60:0c:2f:be:18 brd ff:ff:ff:ff:ff:ff

So, disregarding eth0. Do you have wpa_supplicant running? Does wpa_cli
show successful association with your AP?

Reco


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