Re: AW: Guidelines for Numbering IPv6 Point-to-Point Links and Easing the Addressing Plans

[JORDI PALET MARTINEZ <jordi.palet@consulintel.es>]

Yes, but then we are creating a kind of non-reachability to the router from
outside the network by using only link-local.

If I'm an user and I want to address my router from outside my network, this
is an easy way. Same for the ISP, if he need to address this router and is
outside his network.

Regards,
Jordi




> De: Fred Baker <fred@cisco.com>
> Responder a: <owner-v6ops@ops.ietf.org>
> Fecha: Wed, 1 Mar 2006 11:30:09 -0500
> Para: "Bonness, Olaf" <Olaf.Bonness@t-systems.com>
> CC: <ot@cisco.com>, <jordi.palet@consulintel.es>, "v6ops@ops.ietf.org"
> <v6ops@ops.ietf.org>
> Asunto: Re: AW: Guidelines for Numbering IPv6 Point-to-Point Links and Easing
> the Addressing Plans
> 
> My assumption as a routing geek is that the only reasonable use of a
> numbered point to point link is to address an end station; it needs
> an address to be useful in the network. But any router/router point-
> to-point interface should be supportable using link-local addresses.
> A router needs one address reachable by its administration (eg non-
> link-local), to be a member of any prefix on a LAN that it is
> serving, and to be able to reach p/p-connected end stations it serves.
> 
> On Mar 1, 2006, at 5:41 AM, Bonness, Olaf wrote:
> 
>>> 
>>>    4.  Routing Aggregation of the Point-to-Point Links
>>> 
>>>    Following this approach and assuming that a shorter prefix is
>>>    typically delegated to a customer, in general a /48 [4], it is
>>>    possible to simplify the routing aggregation of the point-to-point
>>>    links.  Towards this, the point-to-point link may be numbered
>>> using
>>>    the first /64 of a given /48.
>>> 
>>> using the first (or any) subnet of a larger prefix, breaks the
>>> conceptual model of DHCP prefix delegation. the prefix is
>>> delegated to
>>> the requesting router and cannot be used to number the link between
>>> the delegating and requesting router.
>> 
>> My assumption from a service provider point of view would be to use
>> a dedicated sub-preaefix (e.g. /48)of my own aggregate to address
>> the point-to-point links (e.g. /64)  to the custumers (in the case
>> I have to do this).
>> 
>> cu
>> Olaf
> 




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