Hi, On Fri, Feb 24, 2017 at 12:34:32PM +0900, Lorenzo Colitti wrote: > I don't think you can say nothing in the past matters here. We know that > there have been host implementations that relied on this guarantee, and we > have to consider that if we change the standard, those implementations will > become non-compliant. Details, please. Besides SLAAC not working (because not defined), which implementations will not work with non-/64 network length? You might know, but if you say "we know", it's not including myself (yet). Gert Doering -- NetMaster -- have you enabled IPv6 on something today...? SpaceNet AG Vorstand: Sebastian v. Bomhard Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann D-80807 Muenchen HRB: 136055 (AG Muenchen) Tel: +49 (0)89/32356-444 USt-IdNr.: DE813185279