[GXemul-devel] MAC address for emulated hosts

[Jan-Benedict G. <jb...@lu...>]

Hi!

I just tried to find a way to configure specific MAC addresses for an
emulated machine. Couldn't find something in the docs and a quick look
at the sources seems to indicate that, for all emulated NICs,
net_generate_unique_mac() is called to calculate a MAC address. It
seems that for two "VMs" run as separate processes, the same MAC would
be used?

  That would not be working well with TAP devices. And the generated
MAC addresses don't work too well for setting up an external DHCP
server. (Some background: I'd like to setup quite a herd of emulated
hosts, based on Qemu, SIMH and gxemul. They'll usually use an overlay
to a static base disk image and the operating systems on the
individual emulated machines will just be different wrt. their MAC
address, thus get different IP addresses. That however implies that I
can actually _supply_ a MAC address.)

  @Anders: Do you already have private patches to allow for
configurable MAC addresses? Or maybe I'd cook up something?

Thanks,
  Jan-Benedict

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