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> I'm trying to understand what techniques/solutions are available to > determine which AS's would make good peering partners. If we look at our > Transit stream to our upstream provider, I had heard the following from > someone and would like to get some other opinions: > > When trying to identify good AS candidates for peering from your transit > traffic stream. It would seem that distinguishing the ingress traffic by > not only the next-hop AS but also by the next-next-hop AS (or by the > complete AS path) so that you can identify which customer or peer of your > transit provider might be a likely interesting new peer for you. However, > due to the concept of BGP traffic in the internet being asymmetrically > distributed. It is not possible to exactly determine the real AS path of > incoming traffic. The only reliable information is about the next-hop and > the origin AS. Assuming that traffic is mostly symmetrical it is possible > to "estimate" the distribution of ingress traffic on AS paths. While this > assumption is questionable it at least allows to find out one (or some) of > the several "potential" intermediate" ASNs for a given origin ASNs. > > Is the above statement OK, and what about egress analysis, would that not > also provide useful as that information is more reliable? > > -guy > >
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