It should be done for normal commercial links and consumer networks (houses) wired (fixed) and wireless (fixed). The execution cost is not that great in those networks for what one gets to verify EUI's are unique. But, for Mission Critical Secure Defense wireless Networks DAD can be avoided if in fact the EUI's are guaranteed to be unique on such devices, especially for MANETs. Some time soon I will post draft to MANET or Autoconfig MANET work that depicts the use of pre-DAD, boot operation of radio, and then post-DAD after boot operation of radio, and that the post-DAD operation is not needed in some cases. This would be an implementation choice, and IPv6 addrconf standard is clear that DAD is required. Thus, the risk of implementation of such a net would have to assume interoperability and uniqueness of the EUI responsibility. There is also Optimistic DAD that can be used for commercial mobile devices on wireless networks, one should review and check. But, today I am aware of no implementations that do not implement DAD or have implemented Optimistic DAD (but there are folks on this list that can correct me if Optimistic DAD has been implemented???).
/jim > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of giuseppe > Sent: Tuesday, May 17, 2005 1:48 AM > To: ipv6@ietf.org > Subject: DAD > > In IPv6 stateless address autoconfiguration, how is it > possible that the > generated address could be duplicated? > The MAC that host appends to the link prefix is unique, isn't it? > Replies appreciated > G > > -- > ---------------------- > ---------------------- > Giuseppe De Marco, Ph.D. > > Dipartimento di Ingegneria > dell'Informazione e Ingegneria Elettrica > DIIIE, University of Salerno > via ponte don Melillo 1, Fisciano, Salerno > tel: +39 089 964012 > email: [EMAIL PROTECTED] > > Department of Information and > Communication Engineering > Faculty of Information Engineering > Fukuoka Institute of Technology (FIT) > 3-30-1 Wajiro-Higashi, Higashi-ku, Fukuoka 811-0295 > Japan > email: [EMAIL PROTECTED] > -------------------- > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
