2012-12-13 21:05, RJ Atkinson <[email protected]> : > > On 13 Dec 2012, at 10:46 , Rémi Després wrote: >> Reverse mapping, whose use I still don't see, >> cannot work the privacy option of RFC 4941 > > It still works fine, because the scope bit > is set to local scope for the RFC-4941 uses > (RFC-4941, Section 3.2.1, Step 3). > > Under IEEE 802 rules, as best I understand them, > all bets are off once the scope bit has been set > to local.
In IEEE, g=1 always specifies that the MAC address is a group address, BOTH for universal and local scopes. > If the 4RD folks want to do something special when (U==0), > as far as I know there aren't any issues. This wouldn't work because 4rd needs a guarantee that its IIDs differ from those of the privacy option. > It is the > apparent insistence upon changing the semantics of > the (U==1) and (G==1) combination that is problematic. The proposal is only to use the u=g=1 pattern (never used so far in IIDs of unicast addresses) as the escape pattern permitting to specify new IID types (for IPv6 unicast addresses): - u=0 => all other bits have any values (privacy option) - u=1 and g=0 => all other bits comply with IEEE EUI-64 - u=g=1 => all other bits have an IETF defined format, determined by an IID type whose pattern is registered by IANA. Regards, RD PS: Note that, to simultaneously run ILNP and 4rd in a site with a guarantee that they won't interfere, it is sufficient that ILNP node IDs are without u=g=1. Each experiment thus deals with its exclusive addresses its own way. > > Yours, > > Ran > > > PS: I'm now offline due to travel, and expect to be > offline for several days. > > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
