So we're now going to take a look at InterConnection Best Practices. While this is not directly about BGP configuration there's a lot here that's actually very significant when considering how to operate BGP and how to configure BGP when talking with neighboring network operators. For the InterConnection Best Practices we're going to look at the types of peering. We will look at the use of the PeeringDB and the IXPDB and we will look at the use of the Internet Routing Registry. We will now look at the different types of peering. Private peering is where two network operators agree to interconnect the networks and exchange their respective routes for the purpose of ensuring that customers can reach each other directly over the peering link. Settlement free peering is where there are no traffic charges and is the most common form of peering on the internet today. Paid Peering is where two operators agree to exchange traffic charges for a peering relationship. How these paid peering operate usually depends on the two operators concerned. Bilateral Peering is very similar to a Private Peering but usually takes place at a public peering point, for example, an Internet Exchange Point. Multilateral Peering takes place at Internet Exchange Points where operators all peer with each other via a device called a route server. And Mandatory Multilateral Peering is where operators are forced to peer with each other as a condition of their exchange point membership. Indeed Mandatory Multilateral Peering is strongly discouraged; it has no record of success. There are one or two places in the world where the exchange point and the members have agreed on a Mandatory Multilateral Peering Policy and this works for them in their particular circumstances but the vast experience around the globe has shown that Bilateral Peering and Multilateral Peering are the most successful types of peering taking place at internet exchange points. There's also Open Peering. Open Peering is where an ISP publicly states that they will peer with all parties who approach them for peering. This is commonly found at Internet Exchange Points where the ISP or network operator will participate via the route server. There is Selective Peering where an ISP's peering policy depends on the nature of the operator who requests peering with them. At IXPs the operator will not generally peer with the route server but will only appear bilaterally. And finally there is Restrictive Peering where an ISP decides who its peering partners are and is generally not approachable to considering peering opportunities. The Peering Database documents ISP peering policies and you can reach it through the URL peeringdb.com I would like to advise all operators of autonomous systems to register the details in the PeeringDB even if at the moment the operator is not at an Internet Exchange Point. This gives the AS visibility within the peering community and should the operator come to an exchange point in the future the entry is visible in the PeeringDB and can be updated as required. Furthermore participation in the peering fora is strongly encouraged as well. There is the Global Peering Forum, the GPF, which is where multinational operators and regional operators meet to discuss and negotiate peering opportunities, but every region also has its own peering forum whether it's European Peering Forum, Middle Eastern, the Asian Peering Forum, Caribbean, Latin America, Africa and so on. Indeed the Peering Fora are so successful many countries now operate their own peering fora either as part of the local exchange point activity or as part of the local network operations group. The other database of interest to the internet operations community is the IXPDB. This documents the internet exchange points and the participants around the world. The IXPDB is hosted by Euro-IX. Euro-IX is the European Internet Exchange Point Association. All internet exchange point operators are recommended to register the IXP in the database. IXPs who are already using IXP Manager will have this happen as part of the IXP Manager setup and this will provide the LAN IP addresses of each member to facilitate automation. By the way, IXP Manager is a full stack management platform for internet exchange points. It includes an administration and a customer portal and helps with providing end-to-end provisioning. It also teaches and implements best practice. It's free and open source and comes highly recommended.

© Produced by Philip Smith and the Network Startup Resource Center, through the University of Oregon.

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