Slightly off topic, but has anyone ever seen 2 separate systems with the
same MAC address?  I thought this was a "never supposed to happen" kind of
thing as MAC's are supposed to be globally unique. However, I've had this
happen twice now with clients on my ADSL network (I use an OpenBSD/PF box
as a router/dhcp server).

In the first case, it was an onboard AOpen NIC on the motherboard, this
time it seems to be an SIS nic. (Judging by the vendor prefix).

NICs are usually in Windoze systems, so I'm not sure if I can use software
to set the MAC. And if I could, is there a 'private' range for MACs that
could be used if I did set it to something else? That way I don't
accidentally give them another mac that might be duplicated.

Thanks.

Sincerely,
Kirk Ismay
System Administrator
The Net Idea

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