Re: [v6ops] out-of-focus: why DHCPv6 breaks Android computers?

Ted Lemon <mellon@fugue.com> Tue, 29 October 2019 11:22 UTC

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From: Ted Lemon <mellon@fugue.com>
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Date: Tue, 29 Oct 2019 07:22:11 -0400
In-Reply-To: <b43f56b8-e5d6-b875-c594-656bc6ba0b45@gmail.com>
Cc: Jen Linkova <furry13@gmail.com>, "v6ops@ietf.org" <v6ops@ietf.org>
To: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [v6ops] out-of-focus: why DHCPv6 breaks Android computers?
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On Oct 29, 2019, at 6:37 AM, Alexandre Petrescu <alexandre.petrescu@gmail.com>; wrote:
> Well no.  After  activating DHCPv6 on CPE the CPE sent three RAs
> changing the Lifetime and flipping the M(anaged) and A(utonomous) flags.
> 
> Packet dumps available upon request.

That’s the problem.   It should turn on the managed bit but not turn off the autonomous bit.  The two can validly be on at the same time.

Of course, since their meanings are deprecated, it’s not too surprising that implementations get this wrong.