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Re: T1 vs. T2 [WAS: Apology: [Tier-2 reachability and multihoming]]
- From: Patrick W Gilmore
- Date: Tue Mar 29 10:50:18 2005
On Mar 29, 2005, at 1:24 AM, Richard A Steenbergen wrote:
Of course. There is a difference between "most peers" and "most
On Tue, Mar 29, 2005 at 02:23:06AM +0100, Stephen J. Wilcox wrote:
Ok, I'm just bored enough to bite. If we're talking about a contest to
701 is not the most connected, it has only customers and a restrictive
set of peers?
who has the most number of directly connected ASNs, I think UU might
win, even with a restrictive set of peers.
Taking a look at a count of customer ASNs behind some specific
note, I come up with the following (some data a couple weeks out of
but the gist is the same):
Network ASN Count
Which begs the question, what is the largest number of ASNs that
peers with? Patrick? :) Somehow I suspect that 701's customer base (702
and 703 aren't included in the above count BTW) overpower even the most
aggressively open of peering policies, in this particular random
and arbitrary contest at any rate.
But it is non-trivial to see which of those adjacencies are transit and
which are peering. (Nearly impossible if you define such things on
Layer 8, but not impossible if you only include which ASes are
propagated to which other ASes.)
At the end of the day, an AS with a LOT of downstream ASes can always
beat a well peered AS - there just aren't that many ASes which peer.