Why don't ISPs peer with everyone?
jerome at ceriz.fr
Mon Jun 6 19:08:01 CDT 2011
2011/6/7 Jimmy Hess <mysidia at gmail.com>:
> (a) Costs of peering; both in terms of administrative overhead,
> ports, circuits, cabinet space,...
The cost of peering on an IXP is roughly the same as setup fees for a
new transit, and a BGP session to an IXP route server is not far from
what will a full view cost in RAM and CPU on your edges.
> (B) Loss of revenue due to peering. An extreme example is a very
> large ISP peering
> with a small ISP, to allow the small ISP to reach large ISP's customers.
> The large ISP loses revenue, if they provide the peering for free,
> since it would mean
> the small ISP is not paying for that transit.
Large ISPs do buy transit too. On a financial perspective, it can be
considered as "outsourcing the peering function", with a paid SLA for
> And once a customer, never a peer.
Never peer with one of your peer's customer is one basic rule of
peering agreements between tier-2 and 1 networks.
It's a shame financial pragmatism makes the Internet less "meshy", and
thus more fragile...
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