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

[Tore Anderson <tore fud no>]

* Dan Williams

> On Thu, 2011-08-11 at 00:10 +0200, Tore Anderson wrote:
>> NetworkManager currently operates on the assumption that Managed
>> (Stateful) DHCPv6 preempts SLAAC. This is not the case; Managed DHCPv6
>> and SLAAC are completely orthogonal. My consumer-grade xDSL CPE (a ZyXEL
>> P-2812HNU-F3) does both at the same time by default, which is a
>> necessity to trigger the following bug:
> 
> Given the discussion from this week about SLAAC vs. the A=1 flag, is
> this patch independent of that or should we wait for additional changes
> in behavior?

Well, the bug I'm trying to fix; when both A=1 and M=1, you get a
seemingly successful activation followed by an instant failure, over and
over and over again; is very real and needs to be fixed. Stock NM takes
forever to connect to my home network because of it, see
<https://bugzilla.redhat.com/show_bug.cgi?id=720188> for a syslog.

The patch fixes the A=1, M=1 case. However it inadvertently breaks the
A=0, M=1 case, so it should *not* be applied. A new and better patch
should be developed, which may involve a more thorough revision of how
NM reacts to various types of RAs. I'll elaborate more on this in an
answer to your other message.

Best regards,
-- 
Tore Anderson