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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