On Mar 21, 2013, at 3:18 PM, Brian Haberman <[email protected]> wrote:

> On 3/20/13 3:26 PM, Johannes Gilger wrote:
>> 
>> What is most depressing to me (as a European) is the scale of
>> under-utilization of the IPv4 address space. Simply have a look at the
>> Hilbert map and check out all the black blocks (either ARIN or US corps)
>> and the most colorful blocks (either APNIC or RIPE).
>> 
>> http://internetcensus2012.bitbucket.org/images/hilbert_icmp_map.png
> 
> Just one quick point on the above... It is unclear how much of the black 
> blocks are due to under-utilization.  The data was collected by utilizing 
> ICMP traffic and many service providers block ICMP traffic. So, those black 
> blocks could be due to lost ICMP probe traffic.

My view as well.  The report made a lot of assumptions about things they 
couldn't reach.  I think the only part know for sure was that they couldn't 
reach them.  The rest is speculation.  

Bob

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