[Dnsmasq-discuss] Problem with VM and dnsmasq

[mario]

Bonjour, Albert.

Unfortunately, I wish it were that simple: I know that, and I have always
changed the interface the VM is linked to  in an appropriate way. I
thought it was tacitly understood.

Besides, like I said, I always see the BOOTP/DHCP request reach the gateway:
if I had forgotten to switch the interface in VBox, that could not possibly
happen.

Cheers,

Mario

On 10/07/2015 04:24 PM, Albert ARIBAUD wrote:
> Hi mario,
>
> Le Wed, 7 Oct 2015 15:41:15 +0200, mario <jjskoli at gmail.com> a écrit :
>
>> Hello, my first post.
>>
>> I use as a gateway a Debian Jessie pc with dnsmasq providing both DHCP
>> and DNS.
>>
>> Normally, it works flawlessly, but there may be one bug. On one of my
>> pcs (Ubuntu 14.04)
>> I run a VirtualBox instance with an Arch Linux VM for which I have
>> chosen a Bridged
>> Adapter mode. When the host is on Ethernet the VM  gets an IP address
>> from dnsmasq
>> unfailingly. But when the host in on wifi, and the VM still in bridged
>> adapter mode, the VM cannot seem to obtain an IP address.
>>
>> [...]
>>
>> I would be glad of any feedback, I hope I have provided enough info to
>> allow diagnosing the problem.
> In a Virtualox VM, you have to specify which host interface your VM's
> interface is bridged to; there is no setting such as "the currently up
> and running interface", it has to be one existing interface, and it is
> a static setting.
>
> Therefore, if it is bridged to eth0, and eth0 is on the network, then
> all is fine on the VM; but if you switch the host to wlan0, then the VM
> still tries to use eth0 (and fails).
>
> One solution may be to define two VM interfaces and bridge one to eth0
> and one to wlan0. At least one of them will be... bound... to get DHCP
> right (but the other one may still believe it has an IP address when
> its host counterpart is down; I havent't tried this setup).
>
>> Cheers,
>>
>> Mario
> Amicalement,