Re: [Dime] Diameter Prefix Delegation Application

[Frank Xia <[e-mail]>]

Hi Julien

Thank for your comments!

Just as IPv4 address management needs not only
DHCPv4 solution but also AAA mechanisms,
IPv6 prefix management as an extension of
address mangement also needs  corresponding
facilitis.

Please also check my inline reply...

BR
Frank

----- Original Message ----- 
From: "Julien Bournelle" <[e-mail]>
To: "Glen Zorn" <[e-mail]>
Cc: <[e-mail]>; <[e-mail]>; <[e-mail]>
Sent: Friday, June 13, 2008 7:29 AM
Subject: Re: [Dime] Diameter Prefix Delegation Application


> hi all,
>
> I second Glen's comments.
>
> Moreover, after a quick look to the Problem Statement draft, I think
> that for section 4.1 (AR) and section 4.2 you can delegate prefix
> during the network access authentication/authorization phase. For NEMO
> case, I thought that DHCPv6
> or even IKEv2 may be used.
Frank=>As a complement of  NEMO DHCPv6 soution,
Diameter can also be used for prefix management.
>From AAA perspective, IMHO, prefix mangement is a
kind of authorization which is possibly decoupled
from authentication.    For example, prefix lifetime renew is
not supposed to take place during authentication stage.

>
> Regards,
>
> Julien
>
> On Fri, Jun 13, 2008 at 1:34 PM, Glen Zorn <[e-mail]> wrote:
>> [e-mail] writes:
>>
>>> Hi all,
>>>
>>> Is there already a draft regarding a new Diameter Prefix Delegation
>>> application? Could somebody provide me with some links to related
>>> drafts, please? I have already read the problem statement draft
>>> (http://www.ietf.org/internet-drafts/draft-sarikaya-dime-prefix-
>>> delegation-ps-01.txt) but I couldn't find further information.
>>
>> Looking over the referenced draft, it seems AFAICT to be an inappropriate 
>> use of Diameter.  I can't find any evidence of actual AAA usage or even a 
>> user -- it seems that the author wants to use Diameter just as a 
>> transport for arbitrary prefixes (I'm certainly willing to be corrected 
>> on that point, however).  I'm led to believe this because of the 
>> following statement "[RFC4818] designs Delegated-IPv6-Prefix attribute 
>> which is used for delegating prefixes.  However in [RFC4818], the 
>> recommended usage scenario is AAA server configures the delegating server 
>> with some prefixes and then DHCP Prefix Delegation [RFC3633] can be used 
>> to delegate these prefixes to the requesting router.  Also 
>> Delegated-IPv6-Prefix carries a number of prefixes only.  Lifetime values 
>> for each prefix can not be carried."  I can't think of a reason, if the 
>> delegated prefixes were for a human user, why the lifetime of the 
>> prefixes would not be just as long as the user session.
>>
>>>
>>> The Diameter Prefix Delegation application is a very interesting thing,
>>> and I'm thinking about to set up a own draft on this topic.
>>>
>>> Best regards,
>>>
>>>
>>> Rafael
>>>
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