North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: de-peering and peering
> 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. If there is an agreement in place (ie. A and B exchanging customer prefixes and X is a customer of A). > 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? You should be able to filter. RADB is one solution that may make it more manageable. But if your not filtering it will still require a transit provider to get the traffic back to X (think asymmetry). Kris > masquerading transit data as if its originating from its own n > 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: [email protected] [mailto:[email protected]]On Behalf Of >>Shashi Kumar >>Sent: Tuesday, April 02, 2002 12:36 PM >>To: [email protected] >>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 >> >> >> > >
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