Re: [PATCH] Don't allow Managed DHCPv6 to short-circuit SLAAC

[Tore Anderson <tore fud no>]

* Dan Williams

> Sure, feel free to ask questions.  I did have the same thought the other
> day when looking through the standards, but the RFCs appear to be
> somewhat ambiguous WRT to whether Managed should care about RA
> prefix/addressing or not.I assume your read on that is that if RA
> indicates Managed mode, both the RA and the DHCP response should be
> honored?

That is how I understand it, yes. From RFC 4861, regarding the Managed flag:

      M              1-bit "Managed address configuration" flag.  When
                     set, it indicates that addresses are available via
                     Dynamic Host Configuration Protocol [DHCPv6].

                     If the M flag is set, the O flag is redundant and
                     can be ignored because DHCPv6 will return all
                     available configuration information.

Doesn't say anything about M=1 allowing one to ignore A=1 in a Prefix
Information Option. Also I note that Windows does both when A=1 and M=1.

In any case, the current behaviour, with the connection being activated
and instantly failed over and over and over again, is really undesirable.

Best regards,
-- 
Tore Anderson