Benny Amorsen wrote: > On 2003-08-19 at 04:14, Mark Smith wrote: > > > a) MAC addresses are reasonably easily to change. You can't guarantee > > b) There have been cases where manufacturers have allocated non-unique > > MAC addresses. What is worse is that these duplications have > > c) MAC addresses are typically placed in outgoing ethernet frame > > headers by the device driver, not by the NIC itself, which is why it > You are forgetting: > d) Some manufacturers allocate only one MAC address per host, with the > expectation that two interfaces would never end up on the same network. > Sun was the canonical example, but you can turn that behaviour off in > the PROM. I do not know how modern Sun machines behave.
e) Things like 802.1Q tagged vlans that providee multiple logical interfaces with their own link-local address space yet the same MAC addresses. -- Dean C. Strik Eindhoven University of Technology [EMAIL PROTECTED] | [EMAIL PROTECTED] | http://www.ipnet6.org/ "This isn't right. This isn't even wrong." -- Wolfgang Pauli -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
