[arin-ppml] Encouraging IPv6 route aggregation

[David Farmer]

On 15 Oct 2009 William Herrin wrote:

> On Thu, Oct 15, 2009 at 7:26 PM, David Farmer <farmer at umn.edu> wrote:
...
> > General Purpose End-User Assignments (PI), /48 or shorter;
> > 2620:0000:/23
> 
> Hi David,
> 
> One ARIN policy problem that's turning this into an IPv6 swamp is the
> "or shorter" part. Every time ARIN hands out a /40 they've effectively
> handed out 256 disaggregable /48's. As a community we'd be far better
> off if everyone who could justify more than a /48 got a /32 from the
> /32 blocks instead.

This is interesting idea, I'm not convinced just yet, but my initial reaction is it 
might be a good idea.  However,  I realy want to hear what more people think 
about this idea.

> This isn't IPv4. We don't actually need to save the bits between /40
> and /32 but it would be awfully handy if I could write a simple route
> filter that says, "your entire ARIN allocation (not subdivided parts
> of it) is what I'm willing to accept and route." I could even resort
> to, "whichever neighbor offers the largest chunk of a given ARIN
> allocation gets the packets for the whole thing so don't try to mess
> with me by failing to offer the aggregate route."

So then are you opposed to the part of 2009-7 that removes the requirement 
to announce the aggregate allocation? 

If we allow service providers to announce prefixes between /32 and /48 then 
why not assign blocks between /32 and /48  to end-users who justify them, 
that that the will reall be that many of them?

I would be very much opposed to making a similar jump from /32 to /24 or 
shorter, but I can see the logic of going from /48 to /32.  If you justify more 
than a /32, you should only get what you can justify, one bit at a time.   

I'll be leading one of the lunch tables topics on IPv6 on Thursday in 
Dearborn, I would like to here what people think.

===============================================
David Farmer                                      Email:farmer at umn.edu
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