Hi, > On 14 Dec 2016, at 11:08, Jeroen Massar <[email protected]> wrote: > > On 2016-12-14 11:55, Holger Zuleger wrote: >> Hi, >> >> I just realized that the permanent interface identifier of my MAC has >> changed after upgrading to OS 10.12 (I guess). >> >> The output of ifconfig shows a new "secured" flag at the permanent address. >> $ ifconfig en0 | grep inet6 | \ >>> sed "s/2[^:]*:[^:]*:[^:]*:[^:]*:/<prfx48>:/" >> inet6 fe80::c54:6333:ac12:c67b%en0 prefixlen 64 secured scopeid 0x4 >> inet6 <prfx48>:20e3:84f6:6794:5ace prefixlen 64 autoconf secured >> inet6 <prfx48>:8822:a8a3:b6ec:a79b prefixlen 64 autoconf temporary >> >> I found two or three posts in the internet, all mentioning (or hoping) >> that this is related to a change to RFC7217 as default IID mechanism. >> >> But one guy sad, that the source code (of 10.11) shows, that this is a >> cryptographic generated interface identifier for SeND (RFC3971). >> >> I tend to believe that the latter is true. > > Seeing how Apple implemented things like "Happy Eyeballs" it likely is > neither. And in the case of "Happy Eyeballs" there is no way to turn it > off either. Filing radar bugs clearly does not help as they never get > addressed or marked as 'dupe' at which point you do not know the status > of the 'original' problem and well, nothing happens...
Interesting - I’d also assumed the new form of address was RFC 7217 support. I don’t think any other common OS implements SeND, does it? Tim
