But it is possible to change the meaning of A=0 to mean use dhc if you have it.
Also multiple prefixes can be provided. L and A are orthogonal. If you set L and not A all that was stated is use these for link knowlege but not for autoconfigure. /jim > -----Original Message----- > From: Erik Nordmark [mailto:[EMAIL PROTECTED] > Sent: Friday, June 03, 2005 1:22 PM > To: [EMAIL PROTECTED] > Cc: Bound, Jim; [EMAIL PROTECTED]; [email protected]; [email protected] > Subject: Re: [dhcwg] RE: purpose of m/o bit > > [EMAIL PROTECTED] wrote: > > > Yes, agreed. Going further, maybe A=0 could signal this? > > But the A flag is per prefix, not per RA. > And so far we haven't assigned any semantics to a flag in the prefix > being zero; the semantics are associated with the flags being > set to one. > That model seems to be useful when extending the flags in the > prefixes > since it provide orthogonal flags. For instance, we added the > 'R' flag > and with that we can have Prefix option which set only the R flag (as > well as the R flag in combination with one of A and L) and > the addrconf > and on-link pieces don't get confused by a prefix with R=1, A=0, L=0; > those functions just ignore prefixes that have A=0 and L=0, > respectively. > > Erik > -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
