Without having read the draft, it occurs to me that the whole idea of DAD latency impacting hand-offs is a self inflicted problem. From the perspective of 'failure to plan on your part does not constitute an emergency on my part', it would seem the prudent thing for a MN to do is establish DAD for all candidate prefixes well before it is ready to start using them. I realize this creates extra traffic if the node doesn't end up moving, but it also prevents a node from stepping on someone else that was actively using an address. Which is more important, making sure a node can move quickly, or making sure a stationary node is not interrupted???
Tony > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Nick > 'Sharkey' Moore > Sent: Monday, October 14, 2002 7:58 PM > To: [EMAIL PROTECTED] > Subject: Optimistic DAD draft ... > > > G'day IPng-ers, > > One of the big issues in getting low-latency > handovers working for IPv6 mobility is the long delay > involved in completing DAD. > > One option is to allow the Mobile Node to communicate > while the address is still Tentative (optimistically assuming > that DAD will succeed), but to adjust its ND / SAA behaviour > in order to minimize disruption in case of an address > conflict (and maintain correct interoperation with unmodified nodes). > > We've kicked the idea around a little on mobile-ip, > and I've formalized my thoughts into an internet draft, > which should get published soon. In the meantime, you can > find it at <http://www.ctie.monash.edu.au/ipv6/fastho.htm> > (tentatively titled draft-moore-ipv6-optimistic-dad-00). > > I'd be interested in your opinions on the draft, > and its potential suitability for standards track. > > > cheers, > Nick > -- > Nick 'Sharkey' Moore <[EMAIL PROTECTED]> > Research Fellow, CTIE Tel: +61 3 9905 3707 > Monash University, Australia Fax: +61 3 9905 5358 > -------------------------------------------------------------------- > 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] > -------------------------------------------------------------------- > -------------------------------------------------------------------- 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] --------------------------------------------------------------------
