[46508] in North American Network Operators' Group
Re: de-peering and peering
daemon@ATHENA.MIT.EDU (Shashi Kumar)
Tue Apr 2 14:33:18 2002
Message-ID: <3CAA0908.4020002@wipro.com>
Date: Wed, 03 Apr 2002 01:09:52 +0530
From: "Shashi Kumar" <shashi.kumar@wipro.com>
MIME-Version: 1.0
To: nanog <nanog@merit.edu>
Cc: Venkatesh Seshasayee <venkatesh.seshasayee@wipro.com>
Content-Type: multipart/mixed;
boundary="----=_NextPartTM-000-79b446b3-4646-11d6-a942-00b0d0d06be8"
Errors-To: owner-nanog-outgoing@merit.edu
This is a multi-part message in MIME format.
------=_NextPartTM-000-79b446b3-4646-11d6-a942-00b0d0d06be8
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Steve:
Thanks for the reply. But when doing a traffic engineering i have the
following problem. Consider the scenario.
Let us say Network A has a peering Agreement with Network B. Now let us
say Network X wants to reach Network B. X and B do not have a peering
agreement. Can Network A use the peering Link between A nd B to route
the traffic of network X.
What are the mechanisms in place in B's network to detect that Network A
is transiting the data( in this case network B looser) from Network X?
Basically what I am trying to arrive at is: Suppose the peering
arrangement between A and B were to be for data originating from A and B
only(and not transited). Can A or B misuse the peering agreement by
masquerading transit data as if its originating from its own n/w?
thx,
shashi
Steve Naslund wrote:
> Peering arrangements are when networks make connections between each other.
> Usually networks of
> equal size (traffic wise) will try to peer with each other. Although this
> may not be technically correct here
> are the basics.
>
> Peering - connections between networks that our cooperative, there is no
> cost other than the physical
> connection itself. That cost might be shared or the smaller network may pay
> for the physical connection.
> Carries traffic that terminates on one of the two networks. i.e. you can't
> go through the peering connection
> you have with my network to get to another network. Consider peering
> connections to be express routes between
> two networks. You generally can get this type of connection if you are a
> service provider or public institution.
> It is harder to get if you are a private entity unless you can show a
> benefit for me in peering with you. In
> other words, I would like the traffic flow to be as symmetric as possible or
> improve service for an important
> customer.
>
> Transit - connections between networks that I pay for an allow me to get to
> anything on the Internet. These
> are generally very expensive but allow you to reach anyone, anywhere.
> Consider transit connections to be the
> superhighway with exits to everywhere but with a lot of traffic. Anyone who
> buys service from an upstream
> provider has a transit connection although they usually refer to full BGP
> sessions.
>
> Now you can see that if I am paying for a transit connection through say
> UUnet and I have a ton of traffic going
> to say Exodus, it is in my best interest to try to establish a peering
> agreement with Exodus so that I don't have
> to use my expensive bandwidth from UUnet. I can also get a more direct
> route to where my customers want to go and
> avoid congestion.
>
> Peering and de-peering have a huge impact on traffic engineering because
> lack of peering means that most traffic
> is being carried by the biggest transit providers like UUnet and Cable &
> Wireless. Peering makes the Internet
> more redundant and reliable and evens out the loads better. Traffic
> engineering is all about peering and which
> paths are preferred over others. I your only connections are transit then
> there are not many options for
> traffic engineering.
>
> Steve
>
>
>>-----Original Message-----
>>From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
>>Shashi Kumar
>>Sent: Tuesday, April 02, 2002 12:36 PM
>>To: nanog@merit.edu
>>Subject: de-peering and peering
>>
>>
>>Dear List:
>>
>> Sorry for a naive question. Could some one on the list explain what is
>>peering and de-peering ? and how peering and de-peering influence
>>traffic engineering?. ( data traffic or otherwise..)
>>
>>thanks in advance,
>>shashi
>>
>>
>>
>
>
------=_NextPartTM-000-79b446b3-4646-11d6-a942-00b0d0d06be8
Content-Type: text/plain;
name="Wipro_Disclaimer.txt"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
filename="Wipro_Disclaimer.txt"
**************************Disclaimer************************************
Information contained in this E-MAIL being proprietary to Wipro Limited
is 'privileged' and 'confidential' and intended for use only by the
individual or entity to which it is addressed. You are notified that any
use, copying or dissemination of the information contained in the E-MAIL
in any manner whatsoever is strictly prohibited.
********************************************************************
------=_NextPartTM-000-79b446b3-4646-11d6-a942-00b0d0d06be8--
