Re: Tierwise ISPs

Hehe,

I tought I look this stuff up on wikipedia without even thinking ...

-- 
Regards,
Iwan Hoogendoorn
CCIE #13084 (R&S / Security / SP)
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On Sat, Nov 28, 2009 at 1:53 PM, Marko Milivojevic <markom_at_ipexpert.com> wrote:
> On Sat, Nov 28, 2009 at 10:41, Iwan Hoogendoorn <iwan_at_ipexpert.com> wrote:
>> Hi Bhuvanesh ,
>>
>>
>> A Tier 1 network is an IP network that participates in the Internet
>> solely via Settlement Free Interconnection, also known as settlement
>> free peering.
>
> Ugh... I would be careful with this statement. This is highly
> "politically wrong".
>
>> Tier 3 - A network that solely purchases transit from other networks
>> to reach the Internet.
>
> What, it's not allowed to have any peers? How is that even possible? :-)
>
> * * *
>
> There have been *endless* discussions on this subject on both NANOG
> and Cisco-NSP mailing lists. The common conclusion is that these term
> "make no sense", i.e. there is so much disagreement about them, that
> it needs to be left to analysis of the reader to determine which (I)SP
> is in which group.
>
> One of the more common examples used is Cogent - are they Tier-1 or
> Tier-2? They don't have settlement-free peering, but only because some
> of the "traditional" T-1 carriers downright refuse to peer with them,
> accusing them of price dumping... There are other examples, as well.
>
> As far as I'm aware, there no books that deal with this subject and
> your best choice are mailing list archives and probably some academic
> papers.
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
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