Re: [Qemu-devel] Re: [PATCH 1/5] virtio-net: Allow setting the MAC address via set_config

[Jamie Lokier]

Paul Brook wrote:
> > What I meant is that if we allow the guest to change his mac address, it
> > can deliberately
> > change it to other hosts/guests mac and thus create networking problems.
> > Although guest can always mangle packets, maybe it worth enforcing these
> > macs for the guest.
> 
> This doesn't seem any different to real hardware that allows you to
> change the MAC address.

Indeed I have used that on several occasions to workaround pointless
firewalls and home networking restrictions.

People doing MAC-level hot-failover in high-availability environments
do it too.

-- Jamie