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[rpd] Report of the Soft Landing isuue

Mark Elkins mje at
Mon Apr 3 13:19:41 UTC 2017

On 03/04/2017 14:50, Noah wrote:
> Elkin,
> Ok talking of ASN's, since most networks either have a /32 or /48 IPv6
> allocation assigned to them,  shall we safely suggest that only less
> that 20k networks (ASN's) announce their IPv6 aggregates. 
> In anycase,  a prefix count of over 600k for IPv4 vs over 30k for IPv6
>  and an ASN count of over 60k originating IPv4 prefixes vs an ASN
> count of over 10k originating IPv6 prefixes, my argument still holds
> on restricting remaining IPv4 space and allocate it on need basis.

Using your numbers, if one looks at the Address Table ratio of 600 to
30, thats 20:1
Using your ASN count ratio - its now 60:20 or 3:1.
a 3:1 ratio seems a lot worse than a 20:1 ratio

I'd still like to see what the real ratios are though.
I did find at:-
"At 70%, the percentage of IPv4 address space announced by ASNs that
also announce IPv6 is in stark contrast with the fact that only around
1.5% of end users can actually use the IPv6 Internet, according to
Google's statistics."

> Meanwhile lets promote more IPv6 adoption for those already with
> address space.

With that - I agree,

> Noah
> On 3 Apr 2017 3:07 p.m., "Mark Elkins" <mje at
> <mailto:mje at>> wrote:
>     On 03/04/2017 13:41, Noah wrote:
>>     On 3 Apr 2017 12:55 a.m., "Owen DeLong" <owen at
>>     <mailto:owen at>> wrote:
>>         I am not calling for softening and depleting IPv4 at this
>>         stage, but I don’t see any advantage to tightening it, either.
>>     The last i checked, the IPv4 FIB is handling over 600k aggregate
>>     prefixes vs IPv6 FIB that stands at close to only 40k aggregate
>>     prefixes a compeling fact that the internet is still largely
>>     dependent on IPv4 today.
>     Noah, you can't use that argument. Perhaps a better number to look
>     at would be how many ASN's there are in the routing table, and how
>     many of them are IPv4 only vs how many have both IPv4 and IPv6 or
>     even IPv6 only.
>     Most ISP's run with one ASN but many run with multiple ASN's - but
>     I believe ASN's would be a better measurement.
>     I, as an ISP advertise one /32 of IPv6, and multiple IPv4 prefixes.
>>     Very few IPv6 only green fields to say the least.
>>         In fact, I would argue that by insisting on holding resources
>>         in the free pool for “possible future newcomers” you are, in
>>         effect, assigning them to organizations without any current
>>         proof of physical infrastructure in the AfriNIC service
>>         region to the disadvantage of organizations that do currently
>>         have proof of infrastructure and a documented need for the
>>         addresses within the region today.
>>     IMHO, your premise is flawed, in my experience (having worked for
>>     3 SP startups and still do),  because we were all startups at
>>     some point when we involved ourselves in the business of
>>     connecting folk to the internet and every iron that we fired up
>>     then and today needed and still needs at the very least an IPv4
>>     address to connect to the internet.
>     Occasionally at AFRINIC Meetings, we have an "IPv6 only" day.
>     Generally, most people survive just fine. I think this "IPv6 Only"
>     day event should perhaps be something we always do at our
>     meetings. Its also been done at SAFNOG (Southern African NOG) a
>     few times.
>>     In anycase, IPv6 internet is still developing sponteneously at
>>     almost 40k prefixes announced with a few case studies around the
>>     US, Europe, Asian and some parts of Africa and South America and
>>     could take another decade as long as telecoms  around the world
>>     still run CGN's.  
>>     IMHO market forces and tech-dynamics (IoT) will push for IPv6
>>     adoption and until then, the over a decade aggressive invetments
>>     in IPv4 internet will still stand even though most equipment and
>>     software today pretty much supports IPv6.
>>     Noah
>     -- 
>     Mark James ELKINS  -  Posix Systems - (South) Africa
>     mje at <mailto:mje at>       Tel: +27.128070590 <tel:+27%2012%20807%200590>  Cell: +27.826010496 <tel:+27%2082%20601%200496>
>     For fast, reliable, low cost Internet in ZA:
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Mark James ELKINS  -  Posix Systems - (South) Africa
mje at       Tel: +27.128070590  Cell: +27.826010496
For fast, reliable, low cost Internet in ZA:

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