On 4/22/15 12:51 PM, Templin, Fred L wrote: > Hi Alex, > >> -----Original Message----- >> From: Alexandru Petrescu [mailto:[email protected]] >> Sent: Tuesday, April 21, 2015 12:42 PM >> To: Templin, Fred L; Jouni Korhonen; [email protected] >> Subject: Re: [DMM] Mobility Exposure and Selection WT call >> >> Le 31/03/2015 00:42, Templin, Fred L a écrit : >>> Hi Alex, >>> >>>> -----Original Message----- From: dmm [mailto:[email protected]] >>>> On Behalf Of Alexandru Petrescu Sent: Thursday, March 26, 2015 3:03 >>>> PM To: Jouni Korhonen; [email protected] Subject: Re: [DMM] Mobility >>>> Exposure and Selection WT call >>>> >>>> Le 26/03/2015 13:17, Jouni Korhonen a écrit : >>>>> Alex, >>>>> >>>>> 3/26/2015, 11:00 AM, Alexandru Petrescu kirjoitti: >>>>> >>>>> [snip] >>>>> >>>>>>> I thought by "fixed" you meant it stays the same wherever the >>>>>>> Host goes (something like the Home Address). >>>>>> >>>>>> Alper - I think a LL address can also be qualified as 'fixed' - >>>>>> it never changes. >>>>> >>>>> Does LL here mean link-local or link-layer? If it is the former >>>>> one, then the above assertion is not correct. >>>> >>>> Link-local. >>>> >>>> And you seem to say a link-local address is not fixed? I think >>>> link-local addresses _are_ fixed set in stone. They are formed >>>> locally without need of help from router. >>> >>> AERO provides a fixed link-local address that is formed from a >>> prefix received by DHCPv6 Prefix Delegation (PD). >> >> Fred - but why should this ll prefix be provided by DHCP? Is it of >> variable value? Or is the link-local constant all the time? (in which >> case it could be hardcoded everywhere). > > DHCPv6 Prefix Delegation delegates an IPv6 prefix to the AERO > Client (e.g., 2001:db8:1:2::/64). The Client then constructs an > AERO link-local address from the prefix as fe80::2001:db8:1:2 > (i.e., it embeds the 64-bit prefix from the prefix delegation in > the 64-bit interface identifier of an IPv6 link-local address).
So, it is not actually a link-local address per the IPv6 Addressing Architecture (https://tools.ietf.org/html/rfc4291#section-2.5.6). Regards, Brian
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