Help setting up networking on KVM

Ryanms3030 · 03-05-2014, 07:22 PM

My laptop is running Debian 7. I am running KVM/Virtual Machine Manager for vms and have installed Arch as a guest but I can't get networking working.

I also have KVM running on Debian on my home server. On the server I set up a bridge but I am using ethernet. On my laptop I am using wifi and don't want to set up the bridge because that involved stopping Network Manager and I prefer to have that on for ease of use with wifi connections.

What are my best options?

evo2 · 03-05-2014, 07:59 PM

Hi,

I'm doing almost the same thing as you but I'm using wicd instead of network manager on my laptop. I use virt-manager to look after my VMs and bridged virtual network. It works flawlessly.

Evo2.

Ryanms3030 · 03-05-2014, 11:30 PM

Quote:

Originally Posted by evo2

Hi,

I'm doing almost the same thing as you but I'm using wicd instead of network manager on my laptop. I use virt-manager to look after my VMs and bridged virtual network. It works flawlessly.

Evo2.

maybe a stupid question, but are you bridging your wifi ?

I tried to set up it up with br0 bridged to my wlan0 and I get an error that wlan0 can't be added to br0. I also tried setting up a virtual network through Virtual Machine Manager's gui and get :

Error creating virtual network: internal error Network is already in use by interface wlan0

evo2 · 03-06-2014, 12:07 AM

Hi,

Quote:

Originally Posted by Ryanms3030

maybe a stupid question, but are you bridging your wifi ?

Perfectly valid question, the answer is yes.

Quote:

I tried to set up it up with br0 bridged to my wlan0 and I get an error that wlan0 can't be added to br0. I also tried setting up a virtual network through Virtual Machine Manager's gui and get :

Error creating virtual network: internal error Network is already in use by interface wlan0

Did you first remove all traces of your manually created bridge? (setup in /etc/network/interfaces?). If so there should already be a "default" network that will work through any physical device. Launch virt-manager, from the "Edit" menu select "Connection Details" and then select the "Virtual Networks" tab. There should be a network there called "default" with "Forwarding:" set to "NAT".

Can you confirm this?

Evo2.

Ryanms3030 · 03-07-2014, 11:19 PM

Quote:

Originally Posted by evo2

Hi,

Perfectly valid question, the answer is yes.

Did you first remove all traces of your manually created bridge? (setup in /etc/network/interfaces?). If so there should already be a "default" network that will work through any physical device. Launch virt-manager, from the "Edit" menu select "Connection Details" and then select the "Virtual Networks" tab. There should be a network there called "default" with "Forwarding:" set to "NAT".

Can you confirm this?

Evo2.

Sorry, just got back to this. So, default network forward to NAT does exist. I have deleted all traces of bridge interfaces. still can't connect to network. I have not been able to install a desktop on Arch (i'm assuming because I can't get online). When I run the VM, I can't load on websites on my laptop (i.e. host system). So it does seem my network is getting taken over when KVM is running. Is it possible that there is something I need to do in the Arch guest to start the network service or something like that?