PCH Peering Paper

Thu Feb 18 00:18:53 UTC 2016

This assumes that there are no cooperatives providing settlement free peering which includes both peer and transit routes.

Owen

> On Feb 17, 2016, at 14:09 , Bill Woodcock <woody at pch.net> wrote:
> 
> Each bit traverses only one peering session, however, at the "top of its trajectory" to use a physical metaphor. The uphill and downhill sides are all transit.
> 
> 
>                -Bill
> 
> 
>> On Feb 17, 2016, at 14:06, Owen DeLong <owen at delong.com> wrote:
>> 
>> 
>>> The premise above therefore devolves to: Since most of the traffic is to those networks, then most of the bits flow over contracted peerings.
>>> 
>>> Perhaps “most” can be argued, but obviously a significant portion of all peering bits flow over contracted sessions. Hopefully we can all agree on that.
>> 
>> There’s greater complexity here, however…
>> 
>> Many of the bits that flow flow over several networks between their source and destination. Likely the vast majority of bits traverse at least 3 autonomous systems in the process.
>> 
>> So when you want to count traffic that went over a non-contract peering session vs. traffic that went over a contract peering session, how do you count traffic that traverses some of each?
>> 
>> Owen
>> 