Tim Hartrick wrote: > All, > > > > > Getting back to the observation that some in the community are > > assigning /127s to the p2p links, this by itself does not imply that > > the interface identifier concept is inherently broken and should be > > removed from addrarch. Even if many operators turn out in fact to > > number all their p2p links this way, this will be an extremely small > > fraction of the total number of addressable end nodes. Thus, in <SNIP> > I am agreement with all the points that Thomas makes. The point above > needs further emphasis. Simply because some operators use a > /(n>64) for point to point links does not mean that all operators will or > should do the same.
The only reason that we use a /127 at IPng.nl is because those tunnels aren't going to be native links ever. For links that could once be turned over to native links one should use a /64, and using /64 for these people is simply a waste of space even if there is enough. Same that we give out /60's, most people behind cable modems don't even have more than 1 subnet and the project is for learning. On a side note we picked /127 & /60's before the other drafts where there ;) Also the SixXS project is going to advise /64's on tunnels and /48's as subnet blocks, though that all depends on the TLA's policy ofcourse.. it's their space in that case ;) As for my opinion on /64's per link and maybe making them smaller.... why should one.. this works perfectly. Ofcourse one could also opt for a: - pick random hostprefix of n bits (eg.. if you get a /100 from the RA, one picks ::123) - check with ND if it is in use - use it. But this is ugly, and if you once have a /80 and then go to a /100 you will have problems renumbering. As addresses will change in that case, now one can trust to have a /64 for each link. And how one picks a hostprefix... EUI-64 works great, so why change it ? Greets, Jeroen -------------------------------------------------------------------- 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] --------------------------------------------------------------------
