On Sun, Jan 12, 2014 at 3:29 AM, Roy Smith <r...@panix.com> wrote: > If you don't believe that two machines can have the same MAC address, > look up Hot Standby Router Protocol. And if you don't believe a machine > can ignore the BIA and assign a new MAC address in software, look up > Decnet <insert derogatory gesture with sound effect here>.
Most people shouldn't have to worry about MAC address duplication/collision on the same subnet (I used MACs as a means of guaranteeing uniqueness among a pool of application servers, for instance), but MAC switching in software can occur in a typical home internet connection scenario. We had a connection set up a few years ago where the ISP tech recorded the source MAC into the far end, and only that MAC would work - so when I stuck in a different router, I needed to switch it to the old MAC before it could establish a connection. Stupid? Yes. Unusual? I hope so, but still more likely than coming across DECnet in a typical home! ChrisA -- https://mail.python.org/mailman/listinfo/python-list
