Re: [homenet] DHCP PD

[Alexandru Petrescu <[e-mail]>]

Le 05/02/2014 09:04, Ole Troan a écrit :
> Ted,
>
>>> actually, we're talking about prefix assignment. which may be
>>> splitting hairs, but isn't quite the same as prefix delegation.
>>
>> Splain?   You mean we're talking about the general problem, rather
>> than the DHCP-PD solution?   If so, that's fine, but the specific
>> comment that Markus made was about DHCP PD, and that's what I was
>> responding to.   I am not specifically advocating the use of DHCP
>> PD to solve this problem, but I do want to see it evaluated
>> realistically, and not on the basis of a misunderstanding of what
>> it does and how it's used.
>
> as one of the authors of RFC3633, DHCP PD was not designed to do
> assignment of prefixes inside a network. DHCP PD was designed to be a
> "fax replacement".

That may be one of the original intents, I dont doubt it, and I am happy
to see it that way (although I wonder what in a fax uses prefixes).  And
I disagree with the statement that DHCP PD to be just a quote fax
replacement.

It's been also used for moving networks, like in RFC6276 and in the
upcoming to some extent it a 'proxy' form.

> there has been a number of proposals for how DHCP PD could be adapted
> for this purpose:
>
> they generally fall into one of flat assignment with central DHCP
> server or hierarchical PD with a spanning tree of DHCP relays.
>
> http://tools.ietf.org/html/draft-baker-homenet-prefix-assignment-01
> http://tools.ietf.org/html/draft-chakrabarti-homenet-prefix-alloc-01
> http://tools.ietf.org/html/draft-gmann-homenet-relay-autoconf-01
> http://tools.ietf.org/html/draft-grundemann-hipnet-00
>
> please take a look at those drafts, and let us know what we've missed
> in the DHCP PD "solution space".

The picture is interesting and one would have to look at them.  I would
specifically look for whether they suggest means to dynamically
configure the relationship between the Relay and the Server.

Alex

>
> cheers, Ole
>