4.2.0, ipv6 and pd over ppp0

Udo van den Heuvel udovdh at xs4all.nl
Sun Aug 22 12:10:49 UTC 2010

On 2010-08-22 14:02, Aaron Murrihy wrote:
> I have been working with prefix delegation with dhcp-4.1.1, and I
> believe (This is the only way I discovered to do it at least) that you
> have to add into /sbin/dhclient-script code to add the prefix to a
> specified interface, using a simple command like ip -6 addr add
> $prefix dev $interface.
> If anyone has any other (or better) ideas, I would be very keen to hear them.

Thanks a lot for your response!
At least someone appears to have PD working.

Please, do you have a patch for dhclient-script? (just to be sure we all
 get this working)

Later we might make all this configurable someway?
I.e.: get PD, and put numbers on ifA and ifB. (or also ifC and ifD)


> On Sat, Aug 21, 2010 at 6:37 AM, Udo van den Heuvel <udovdh at xs4all.nl> wrote:
>> On 2010-08-20 18:20, Udo van den Heuvel wrote:
>>> I run it like:
>>> ./dhclient -6 -P -d -v ppp0
>>> I see the client do IA_PD etc and also see a message status code Success.
>>> But where does the PD go?
>>> Does the client store the Prefix?
>>> Assign it to an interface?
>>> I did not find a race of such action.
>>> Can someone please shine a light on this?
>> Hmm. I found this here:
>> http://lists.cluenet.de/pipermail/ipv6-ops/2009-December/002769.html
>> Bjørn Mork asks the right questions:
>> I'm interested in how I
>> configure the *client* to request a PD and configure one or more
>> interfaces based on that.  The main problem is: How do I tell the client
>> that I want to allocate subnet X from the delegated /48 or /56 to
>> interface I, and subnet Y from the /48 or /56 to interface J?
>> Bonus for some way to trigger radvd to announce a subnet on one or more
>> interfaces, and extra bonus for some way to trigger dhclient based on
>> received RA flags (don't know if that is feasible as long as the
>> autoconf is done by the kernel?).
>> Were any of these answered somewhere?
>> I.e.: can we actually /use/ `dhclient -6 -P`?
>> Kind regards,
>> Udo

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