[152011] in North American Network Operators' Group
Re: Question about peering
daemon@ATHENA.MIT.EDU (Suresh Ramasubramanian)
Sat Apr 7 23:43:28 2012
In-Reply-To: <86wr5r4281.fsf@seastrom.com>
From: Suresh Ramasubramanian <ops.lists@gmail.com>
Date: Sun, 8 Apr 2012 09:12:43 +0530
To: "Robert E. Seastrom" <rs@seastrom.com>
Cc: NANOG Mailing List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
fair enough. i was thinking smaller and more localized exchanges rather than=
the big ones
--srs (iPad)
On 08-Apr-2012, at 3:46, "Robert E. Seastrom" <rs@seastrom.com> wrote:
>=20
> Actually, Suresh, I disagree. It depends on the
> facility/country/continent, the cost of joining the local IX fabric at
> a reasonable bandwidth, your cost model, and your transit costs. In
> short, it's not 1999 anymore, and peering is not automatically the
> right answer from a purely fiscal perspective (though it may be from a
> technical perspective; see below).
>=20
> At certain IXes that have a perfect storm of high priced ports and a
> good assortment of carriers with sufficiently high quality service and
> aggressive pricing, a good negotiator can fairly easily find himself
> in a position where the actual cost per megabit of traffic moved on
> peered bandwidth exceeds the cost of traffic moved on transit _by an
> order of magnitude_. That's without even factoring in the (low)
> maintenance cost of having a bunch of BGP sessions around or upgraded
> routers or whatever.
>=20
> Sometimes making the AS path as short as possible makes a lot of sense
> (e.g. when trying to get an anycast network to do the right thing),
> but assumptions that peering results in lower costs are less true
> every day.
>=20
> -r
>=20
> Suresh Ramasubramanian <ops.lists@gmail.com> writes:
>=20
>> what does it cost you to peer, versus what does it cost you to not peer?
>>=20
>> if you are at the same ix the costs of peering are very low indeed
>>=20
>> On Saturday, April 7, 2012, Anurag Bhatia wrote:
>>=20
>>> Hello everyone
>>>=20
>>>=20
>>>=20
>>> I am curious to know how small ISPs plan peering with other interested
>>> parties. E.g if ISP A is connected to ISP C via big backbone ISP B, and s=
ay
>>> A and C both have open peering policy and assuming the exist in same
>>> exchange or nearby. Now at this point is there is any "minimum bandwidth=
"
>>> considerations? Say if A and C have 1Gbps + of flowing traffic - very
>>> likely peering would be good idea to save transit costs to B. But if A a=
nd
>>> C have very low levels - does it still makes sense? Does peering costs
>>> anything if ISPs are in same exchange? Does at low traffic level it make=
s
>>> more sense to keep on reaching other ISPs via big transit provider?
>>>=20
>>>=20
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>>> Thanks.
>>>=20
>>> --
>>>=20
>>> Anurag Bhatia
>>> anuragbhatia.com
>>> or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected
>>> network!
>>>=20
>>> Twitter: @anurag_bhatia <https://twitter.com/#!/anurag_bhatia>
>>> Linkedin: http://linkedin.anuragbhatia.com
>>>=20
>>=20
>>=20
>> --=20
>> Suresh Ramasubramanian (ops.lists@gmail.com)
