"David W. Hankins" <[EMAIL PROTECTED]> writes: > On Fri, Sep 05, 2008 at 10:32:46AM -0400, Robert E. Seastrom wrote: >> Forwarded to NANOG in the interests of wider awareness... having been >> there and torn out my already scarce hair, duplicate MAC addresses can >> really mess up your day... > > Out of curiosity, does this happen often enough we might want to > consider an automated means to negotiate out of the problem state > (e.g. detect collisions and negotiate MAC address by DHCP)? > > It would take years to deploy but might save thousands of hairs.
The same DHCP server (ip helper-address blah) serves my office, my home, and the colo. Can you give me an idea of a good heuristic for telling the difference between moving my laptop around and finding MAC address collisions? Or are you suggesting that you hand out a MAC address along with an IP address when the client DHCPs and the client then changes it? -r