[systemd-devel] MAC address of host0 interface for --network-bridge

[Lennart Poettering]

On Thu, 16.03.17 00:27, Bhasker C V (bhasker at unixindia.com) wrote:

> Hi all,
> 
>  I am using --network-bridge option to setup my container systemd-nspawn.
>  I however dont see any option in man systemd-nspawn to specify a MAC
> Address for the host0 interface. Is there a way to do this ?
>  I see that when using --network-bridge option, the host0 interface
> MAC is fairly constant but does this get auto-generated  ? if yes, is
> there a chance for this MAC to change ?

You can change the MAC address via the ip tool during runtime.

That said, we derive the MAC by default as hash from the host machine ID
and the container name, so that it is effectively random, but stable,
and different on each instance of the container and host.

Lennart

-- 
Lennart Poettering, Red Hat