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Re: Exodus/C&W Depeering
- From: Hank Nussbacher
- Date: Tue Mar 26 15:53:55 2002
At 10:18 AM 26-03-02 -0800, Bill Woodcock wrote:
In general, as companies and backbones merge and eliminate "old" ASNs, that
would reduce the overall AS path length. That in general should not affect
latency but as tier-1 ASNs grow in size, and control more of the path end
to end, the latency should improve. The majors/tier1s like AT&T, UUnet,
Genuity and C&W provide SLAs "end-to-end" *within* their ASN. They control
the pipes, they know what they can take and they don't have to worry about
some overloaded peering link. So as consolidation takes place, we should
see better latencies and better SLAs.
On Tue, 26 Mar 2002, Stephen J. Wilcox wrote:
> You mean Exodus are well connected and C&W limit themselves which gives
> longer paths and increased latency.
Longer paths definitely, increased jitter probably, increased latency
probably, increased loss possibly.
C&W obviously have to have a lot of peering as well, since it's all they
have to sell to their customers. However, their peering tends to be
limited to a small number of peers to whom they have large connections,
whereas Exodus had a large number of peers to whom they had medium-sized
connections. So the average hop-count and as-path length for the Internet
as a whole are both increased by this action, and nearly all paths
increase in length for Exodus customers. So yes, Exodus customers are the
big losers in the wake of this.