On Aug 15, 2013, at 10:05 , Leo Bicknell <bickn...@ufp.org> wrote: > On Aug 14, 2013, at 3:27 PM, Patrick W. Gilmore <patr...@ianai.net> wrote:
>> Once you define what you mean by "how bit is the Internet", I'll be happy to >> spout off about how big it is. :) > > Arbitrary definition time: A Internet host is one that can send and receive > packets directly with at least one far end device addressed out of RIR > managed IPv4 or IPv6 space. > > That means behind a NAT counts, behind a firewall counts, but a true private > network (two PC's into an L2 switch with no other connections) does not, even > if they use IP protocols. Note that devices behind a pure L3 proxy do not > count, but the L3 proxy itself counts. > > Now, take those Internet hosts and create a graph where each node has a > binary state, forwards packets or does not forward packets the result is a > set of edge nodes that do not forward packets. The simple case is an end > user PC, the complex case may be something like a server in a data center > that while connected to multiple networks does not forward any packets, and > is an edge node on all of the networks to which it is attached. > > To me, "all Internet" traffic is the sum of all "in" traffic on all edge > nodes. Note if I did my definition carefully out = in - (packet loss + > undeliverable), which means on the scale of the global Internet I suspect out > == in, when rounded off. I have a feeling you flipped "in" & "out" in that formula. > So please, carry on and spout off as to how big that is, I think an estimate > would be very interesting. Spout off time: My laptop at home is an edge node under the definition above, despite being behind a NAT. My home NAS is as well. When I back up my laptop to my NAS over my home network, that traffic would be counted as "Internet" traffic by your definition. I have a feeling that does not come close to matching the mental model most people have in their head of "Internet traffic". But maybe I'm confused. -- TTFN, patrick
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