[v6ops] Re: [IPv6]Re: Is the P flag even necessary? M flag already does enough (Re: Re: A detail review of draft-ietf-6man-pio-pflag-04)

[Ted Lemon <[e-mail]>]

What I’m saying is that the text is ambiguous because you don’t say what
“by default” means. I am one of the people who wants to get rid of the
hierarchical model.

Op di 6 aug 2024 om 09:05 schreef Timothy Winters <[e-mail]>

> Hi Ted,
>
> On Mon, Aug 5, 2024 at 2:30 PM Ted Lemon <[e-mail]> wrote:
>
>> On Mon, Aug 5, 2024 at 11:16 AM Timothy Winters <[e-mail]> wrote:
>>
>>> v6ops has a draft for PD on the LAN to improve this situation.
>>>
>>> https://datatracker.ietf.org/doc/draft-ietf-v6ops-cpe-lan-pd/
>>>
>>> Please feel free to send comments, we are about to do WGLC on it.
>>>
>>
>> Hey, Tim. I hadn't read the document in a while. I see this text in the
>> last requirement:
>>
>> The IPv6 CE Router SHOULD by default provision IA_PD IA prefixes with a
>> prefix-length of 64.
>>
>> I read this as "if the DHCP client doesn't specify a narrower prefix, the
>> CE router SHOULD .. 64"
>>
>> Is that what you intended? If not, I think you need to say more. If that
>> is what you intended, this won't work, because if we stack CE routers, I
>> expect every CE router to ask for a /48, rather than not specifying, and
>> that would mean that we'd always delegate the narrowest remaining subset of
>> the outer CE router's delegation to the first inner router that makes a
>> request.
>>
> That's what the working group wanted.  The original version of this
> document had more text about how to support hierarchical or flat models.
> After a round or two discussion what came out of that was routers behind a
> CE Router are no longer a CE Router as they aren't at the customer edge.
>  The draft reflects that general consensus, that leans towards deploying a
> flat model as opposed to hierarchical, which is where the /64 length
> derives from.
>
> I think it may be time for another document to specify what to do if
> you're a Internal Router (but not SNAC).  We could include all the flat
> model text for becoming a DHCP Relay and giving out IA_PD with /64 from the
> customer edge.
>
>>
>>
>