[141326] in North American Network Operators' Group
Re: Why don't ISPs peer with everyone?
daemon@ATHENA.MIT.EDU (Joel Jaeggli)
Tue Jun 7 16:00:38 2011
From: Joel Jaeggli <joelja@bogus.com>
In-Reply-To: <Pine.LNX.4.64.1106061540570.11051@whammy.cluebyfour.org>
Date: Tue, 7 Jun 2011 05:12:01 -0700
To: "Justin M. Streiner" <streiner@cluebyfour.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 6, 2011, at 12:53 PM, Justin M. Streiner wrote:
> On Mon, 6 Jun 2011, rucasbrown@hushmail.com wrote:
>=20
>> All the whole "don't peer with this guy" only makes your customers
>> have worse latencies and paths to other people, making the Internet
>> less healthy.
>=20
> Not necessarily. Peering with an ISP who wants to take the traffic =
between your network and theirs through a saturated pipe, an overloaded =
router, or across an MPLS pipe with 13 underlying hops (each of which =
could be a choke point themselves) will not make your end-to-end =
latencies any better.
>=20
> As others have mentioned, some ISPs do have friendly peering policies. =
This is particularly true for ISPs that are co-located at the same IXP, =
because much of the opex is already baked into the ISP's relationship =
with the IXP.
>=20
> The reason most of the larger ISPs, particularly those who live in the =
DFZ, have peering policies (especially for settlement-free peering) that =
could be construed as less friendly to smaller networks is because those =
guys want to sell you transit, rather than let you peer for free, or for =
less than a the full transit rate. It doesn't make financial sense for =
them to exchange bits with you for free, when they can make money off of =
those same bits if you buy transit instead.
carrying packets long distances cost more than carrying them short =
distances... large networks have an incentive to have the cost of that =
conveyance be reflected in peering relationship figuring out what if =
relationship makes sense in the marginal sense implies both parties see =
mutual benifit.
> jms
>=20
