Re: RA "requires" DHCPv6 ?

Fernando Gont <fgont@si6networks.com> Sat, 31 March 2012 19:43 UTC

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Date: Sat, 31 Mar 2012 21:43:17 +0200
From: Fernando Gont <fgont@si6networks.com>
Organization: SI6 Networks
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To: Karl Auer <kauer@biplane.com.au>
Subject: Re: RA "requires" DHCPv6 ?
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On 03/31/2012 03:12 PM, Karl Auer wrote:
> On Sat, 2012-03-31 at 14:10 +0200, Fernando Gont wrote:
>>> Anyway, I've been working on the basis that the M and O flags are
>>> advisory and not prescriptive. That is, they do not *require* the
>>> host to do anything.
>>
>> Exactly: They do not REQUIRE you to do DHCPv6. You MAY want  not to do
>> it, and just not use the Internet for the day.
> 
> Or you could use one's statically assigned address. 

Oh, yeah. And you could have opted to not send the RS in the first
place... and what? :-)

-- However, particularly in the case in which the local router wants you
to use DHCPv6, they could easily block addresses that have not been
leased by the DHCPv6 server. SO, at the end of the day, you're at its mercy.


> Or you could make
> addresses using other available prefixes, from the same or other
> routers.

We were assuming the "regime" was controlling the local link. If they
do, its up to them whether there are other routers on the link and/or
whether RAs are allowed to flow on that link.

Thanks,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492