On Feb 5, 2013, at 9:01 AM, [email protected] wrote: >> With these specifications, it is impossible on a SLAAC link that two hosts >> that have universal-scope addresses (necessarily different if they >> communicate at the MAC layer), would have conflicting IIDs at the IP layer >> if they derive them from MAC addresses. > > Impossible if the MAC addresses are indeed unique. That is correct for > *almost* all cases. But not 100%.
Yup, there have been multiple instances where NIC vendors have accidentally (or possibly intentionally) recycled MACs. And, unfortunately with the increase in virtulization (and cloning of virtual machines) the chances of identical MACs increases dramatically… W > > Steinar Haug, AS 2116 > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > -- "I think it would be a good idea." - Mahatma Ghandi, when asked what he thought of Western civilization -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
