Den 6. mar. 2016 13.41 skrev "Karl Auer" <ka...@biplane.com.au>:
> Dunno about "harsh", but RFC 2464, section 4 says that the prefix must > be 64 bits. By (extremely strong) implication, a host must not use a > prefix of any other length to perform SLAAC. I say "extremely strong" > because the entire description of how an IPv6 Ethernet interface > identifier is formed depends on it being composed of the prefix plus an > EUI-64 identifier. Later RFCs firm up the requirement and apply it in > other contexts. But the most popular OS (Windows) completely ignores all of that and makes up an identifier not based on EUI-64. Everyone are happy anyway. The RFC should have let identifier selection as an implementation detail as the risk of collision is almost non existent given a sufficient random selection and we have duplicate address detection as a safeguard. Regards Baldur
