On Thursday 18 March 2004 21.28, Kirk Ismay wrote: > 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.
In some BIOSes there are options for setting the MAC address for onboard LAN. If you have access to the PC's, that is. /Sigfred
