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Author: Ralph Ronnquist
To: dng
Subject: Re: [DNG] Picking VM MAC addresses (was Re: A way of holding telephone-conferences with DEVUAN?)
Olaf Meeuwissen wrote on 9/4/20 9:48 pm:
> Hi,
> Ralph Ronnquist via Dng writes:
>> [...]
>> btw, the MAC address choice has some rules apart from needing to be different
>> from any other MAC address your networking will get to know of. My rule of
>> thumb is to start with 04, end with 2, and fill the middle "randomly", but keep
>> the same MAC address allocated for its individual guest system, which I also
>> keep documented in /home/share/dhcphosts.
> If you pick MAC addresses for your VMs, just make sure they are locally
> administered ones. See
> https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local
> These have the second least significant bit of the first byte set to
> one, so starting with 04 is NG. First byte values matching 0x#2, 0x#3,
> 0x#6, 0x#7, 0x#a, 0x#b, 0x#e and 0x#f, where # stands for an arbitrary
> hexdigit, are fine.

.. any day without learning something is a lost day. :) Obviously I need to
polish my thumb.