[arin-ppml] [arin-council] Submitted to ARIN Consultation and Suggestion Process

Owen DeLong owen at delong.com
Fri Aug 19 15:43:32 EDT 2011

On Aug 19, 2011, at 7:48 AM, Heather Schiller wrote:

> On Fri, Aug 19, 2011 at 4:08 AM, Owen DeLong <owen at delong.com> wrote:
>> On Aug 18, 2011, at 5:53 PM, Paul Vixie wrote:
>> .
>>>> Not so much the way the prefix was acquired as when the prefix was
>>>> acquired. IMHO, if you acquire prefixes that late in the game, you should
>>>> expect that some people might be out of routing slots and may not be able
>>>> to carry them. IPv4 is doomed to this fate IMHO. ...
>>> can you explain why IPv6 would not be similarly doomed ?
>> Because I don't need another /16 when I put 65,000 hosts on my /64?
>> Owen
> I believe Paul's point is: What makes you so sure that people with
> limited routing slots, will choose to carry those new fangled v6
> things that only geeks are using, versus turning off v6 in order to
> carry more v4 routes?  There isn't a magical routing table separation
> inside the box.  Providers know who they can reach on v4, they know
> there is content on v4 and that they will have less complaints and
> more customers working if they choose v4 over v6.  Another thing that

That's very true. However, I think that most network engineers are able
to see that IPv6 has a sustainable future and IPv4 does not. I can't
imagine that very many providers would actually consider turning off
IPv6 to make IPv4 routing slots available as doing so would be so utterly

I suspect those that do will not subsequently be viable long enough
for this to truly matter.

> could happen is that folks move to filter on /23 or shorter, instead
> of /24.  It's hard to imagine that today, but that may be more
> palatable than dropping entire regions.

I wouldn't think people would drop entire regions. I can, however, foresee
people dropping newer IPv4 routes in favor of preserving pre-existing

> In all of this, I have not seen a push for better aggregation - so
> here is a nudge.. if you see your company on the list, go ask why and
> see what can be done to aggregate.
> http://www.cidr-report.org/as2.0/#Gains  for the full list.
> ASnum  	NetsNow	  NetsAggr	  NetGain	  % Gain  	Description
> Table  	371480	  219140	  152340	  41.0%  	All ASes
> AS6389  	3583	  231	  3352	  93.6%  	BELLSOUTH-NET-BLK - BellSouth.net Inc.
> AS18566  	1912	  376	  1536	  80.3%  	COVAD - Covad Communications Co.
> AS4766  	2498	  969	  1529	  61.2%  	KIXS-AS-KR Korea Telecom
> AS22773  	1433	  106	  1327	  92.6%  	ASN-CXA-ALL-CCI-22773-RDC - Cox
> Communications Inc.
> AS4755  	1531	  223	  1308	  85.4%  	TATACOMM-AS TATA Communications
> formerly VSNL is Leading ISP

Yep... That will forestall the situation for a little while if people actually
do something about it.


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