On 16/12/2016 00:12, Holger Zuleger wrote: > >>> My info is, to set >>> sysctl -w net.inet6.send.opstate=0 >>> to go back to mac address based eui64, but didn't checked it. >> >> Please don't resort to eui64. That's a bad idea. See RFC7721 and RFC707 > Hmm, yes but from an operating view... > > In case of re-numbering your network, RFC72177217 (and SEND as well) is > a step backward. Both EUI48 and the Windows random stable IID mech have > the benefit of prefix independent IIDs. > > The change of name to IP mapping in the DNS is ways easier if the IID > remain the same. I have a small programm to re-generate additional AAAA > records if I have to introduce a new provider prefix (and delete the old > one as well). > > If the IID is prefix dependent (CGA, RFC7216), than the best (or the > only scalable way) is that the host itself updates the DNS via dynamic > updates. > And integrating dynamic dns into standard operating systems is another > thing I'm waiting for a long time now.
Using Dynamic DNS Update for this has been recommended since RFC4192 in 2005. We renewed that in https://tools.ietf.org/html/rfc7010#section-6.1 . If many operators yell for it, it might even happen. Brian > BR > Holger >