[lxc-users] Problem starting container when network is set to macvlan (on an wlan physical interface)

[Gros Lalo]

Hi,

I just found some explanation as to why the macvlan mode will not work on
Wifi: https://superuser.com/questions/1113812/how-to-
configure-macvlan-interface-for-getting-the-ip/1114044

"
Macvlans are not built to work on wireless interfaces. The reason is that
all APs will reject frames originating from a MAC address which did not
authenticate with them, while the whole point of macvlans is exactly to
provide new subinterfaces with their own MAC address, different from that
of the physical interface. It is thus no surprise that when you try to
enable a default gateway on the macvlan interface, which automatically
tears down the original gateway on the wlan0 interface (remember the rule: one
default gateway per routing table only), you are left without a connection.
"

Kind regards

On Tue, Dec 5, 2017 at 11:21 PM, Gros Lalo <gros.lalo at gmail.com> wrote:

> Hi,
>
> I am running latest LXD/LXC (version 2.18) distributed with Ubuntu 17.10.
> I have 2 physical network interfaces on the computer: one ethernet and one
> wifi. Earlier i was using the ethernet one and had a profile set to use
> macvlan over it. Everything worked smoothly. Today, i had to move my router
> away and hence switched to using the Wifi adapter on the host. Thus i
> changed to another profile where I enabled macvlan over that wifi
> interface. After this I am not able to get the network up in my container.
> The container runs but,
> 1. lxc list <container_name> does not show any IP address.
> 2. inside of the container there is no network.
> 3. The host's network gets dropped (all my ssh connections to the machine
> hosting the container ended).
>
> I am wondering if this is a known issue and what is the work around.
> Otherwise is it possible to get some tips on how to troubleshoot this
> problem. Ideally i would like to use macvlan (instead of say bridge)
>
> Thanks in advance
>
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