filtering /48 is going to be necessary

Fri Mar 9 14:50:56 UTC 2012

Jeff Wheeler <jsw at inconcepts.biz> wrote:

Hello Jeff,

> On Fri, Mar 9, 2012 at 3:23 AM, Mehmet Akcin <mehmet at akcin.net> wrote:
>> if you know anyone who is filtering /48 , you can start telling them
>> to STOP doing so as a good citizen of internet6.
>
> I had a bit of off-list discussion about this topic, and I was not
> going to bring it up today on-list, but since the other point of view
> is already there, I may as well.
>
> Unless you are going to pay the bill for my clients to upgrade their
> 3BXL/3CXL systems (and similar) to XXL and then XXXL, I think we need
> to do two things before IPv6 up-take is really broad:
>
> 1) absolutely must drop /48 de-aggregates from ISP blocks
> 2) absolutely must make RIR policy so orgs can get /48s for
> anycasting, and whatever other purposes

I used to be (or still am) on the same page as you are. I was dropping
everything smaller than a /36 from PA ranges at the edge. 

I recently had to relax this filter, because Cloudflare seems to insist
on throwing tons of /48s from their 2400:cb00::/32 into the air without
an aggregate. And guess what the popular cloud reverse proxy for IPv6
webpages is these days ... cloudflare.

Yes, it sucks, yes, I wrote them, but no answer and no change.

Best Regards,
Bernhard