In message <505e83f6.3030...@joelhalpern.com> "Joel M. Halpern" writes: > Since you invited flames... > > The argument on /64 as the longest prefix is not that it is magically > unnatural. > Rather, it is that there are a number of current and evolving protocols > that depend upon that /64. The obvious example is that SLAAC does not > work if subnets are longer than /64. > > The rules in this regard are written into approved RFCs. If homenet > wants to change that, it really needs to go to 6man with a strong case. > (for point-to-point inter-router links this was recently relaxed. > > At the same time, andy operator who insists on giving homes a /64 is > being inappropriately restrictive. Homenet should say that, rather than > trying to change the IPv6 architecture. > > Yours, > Joel
Joel, I don't consider your email a flame at all. Thanks for responding. SLAAC (which I am not at a fan of) won't work but DHCPv6 will so IMHO no loss. CGA also won't work but then again I've also never been a fan of security half measures. Yes anti-spoofing without prior exchange of a key is nice, but no reasonable authorization could be based on CGA without also exchanging some sort of key or cert and at that point the CGA as a public key is redundant. If SLAAC and CGA are the only things that break *and* providers do hand out prefixes that are too small, then /64 prefixes will have to be subdivided. So a question for you is what else if anything will break? I also understand that you are suggesting that this be taken to 6man. That is a good suggestion. Curtis > On 9/22/2012 11:30 PM, Curtis Villamizar wrote: > > 12. This is sure to be controversial. I pointed out that using > > subnets longer than /64 is OK as long as they are not leaked > > into global routing. Please read the text and changes before > > exploding on this topic. It may be necessary to subnet a /64 if > > that is all a provider will give you and you need subnets. It > > does work and it is no more unnatural than subnetting a class-A > > network would be in 1990. It means using DHCPv6 and not using > > RA prefixes for GUA (otherwise SLAAC implementations would > > likely try to use the whole bottom 64). _______________________________________________ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
