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Re: [Xen-users] mac addresses domUs

Mike A. Kenny wrote:
AFAIK every NIC manaufacturer is allocated a 2 (or is it 3?) byte prefix for 
the device
addresses. This prevents address clashes during ARP. Are there any guidelines on what macs to assign to domU devices? Or is this even something that one needs to consider?

Mike, the Users Manual (located at http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/user.html ) says the following:

"You may also want to edit the vif variable in order to choose the MAC address of the virtual ethernet interface yourself. For example:

    vif = ['mac=00:16:3E:F6:BB:B3']

If you do not set this variable, xend will automatically generate a random MAC address from the range 00:16:3E:xx:xx:xx, assigned by IEEE to XenSource as an OUI (organizationally unique identifier). XenSource Inc. gives permission for anyone to use addresses randomly allocated from this range for use by their Xen domains."

Anthony Valentine
Asst. I.T. Manager
Spenard Builders Supply

UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things.

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