TOPOLOGY
The IP network (Internet Protocol) of ANSP has a star topology. Its logical structure has been introduced at the PPTA - Academic Traffic Exchange Point section. In the PPTA there is no hierarchy among networks. Every institution and project that is part of ANSP and every network with which it directly exchanges traffic is treated in the same way, as an independent and autonomous network. For this, the BGP (Border Gateway Protocol) is used, which allows each participant to have complete freedom of choice of their topologies, internal protocols and network policies. And likewise, to have the freedom also to exchange traffic directly with another networks.
Naturally, the physical structure is quite different. The figure below shows the complete topology of the PTTA, with all its components. It can be seen that to achieve the logical simplicity presented in the figure, in addition to the PTTA, to which nineteen institutions are directly connected, ANSP maintains three points of concentration, in Campinas, where Unicamp and nine other institutions are connected, in São José dos Campos, where INPE and four more institutions are connected, and in São Paulo, where USP, the RNP PoP in São Paulo, and another fifteen institutions, are connected.
ANSP external connectivity
The physical map of the IPÊ network of the RNP, used by ANSP to provide its users with access to research and education institutions throughout the country, can be seen on the RNP’s web page, http://www.rnp.br/backbone/index.php. Similarly, the physical map of RedCLARA, which allows ANSP users to have direct access to the Latin American networks, is available on the web page http://www.redclara.net/index.php?option=com_content&view=article&id=51&Itemid=422&lang=en.
Access to the research and education networks around the world and to the commodity internet is a little more complex. The figure below shows schematically how it works. It can be seen that:
- Physical access to the Brazilian commodity Internet is handled directly by ANSP in the PTT of NAP do Brasil and, through the RNP, in the PTT-Metro of NIC.br.
- Physical access to the international commodity Internet is handled at two points. In the NAP of the Americas in Miami, through the MRS service (Managed Routing Services) of the Terremark World Wide company, and in the PoP of Internet2 in Atlanta, through its Transit Rail-Commercial Peering Service (TR-CPS).
- ANSP reaches international research and education networks via the AtlanticWave consortium, Distributed Traffic Exchange Point with points of presence in São Paulo (PTTA), Miami (AMPATH), Atlanta (SoX), Washington, DC (MAX / NGIX) and New York (MANLAN).
- Through AtlanticWave, ANSP exchanges traffic with Internet2, with the NLR (National Lambda Rail), with the network of Canada (CANARIE), with the TransLight project and the European GÉANT network. Through these last two, ANSP has access to networks in Europe, Asia, the Middle East and Africa.
- Through Internet2, ANSP has access to other American networks (ESnet, NISN, NREN and DREN) and to the StarLight traffic exchange points in Chicago and PacificWave on the U.S. west coast. Through these last two and the GLORIAD and TransPAC2 projects, ANSP has access to networks in Asia and Oceania.
