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TERENA compendium of national research and education networks in europe/network3.7 Cross-border Dark FibreA number of countries have or are planning to install cross-border darkfibre links from one neighbouring NREN to the other. A relatively recentdevelopment, cross-border dark fibre “is optical fibre dedicated to use by asingle organisation—where the organisation is responsible for aaching thetransmission equipment to ‘light’ the fibre” (‘Networks for Knowledge andInnovation,’ SERENATE Summary Report, pg. 34-5). Table 3.7.1 provides anoverview of current and planned cross-border dark fibre links.As the table suggests, there are more planned links than current linksand the majority of the cross-border links are concentrated in CentralEurope. Being a recent development, any additional conclusions about thedevelopment of cross-border dark fibre are misplaced.3.8 Routers and SwitchesA router is a device or, in some cases, soware in a computer, thatdetermines the next network point to which a packet should be forwardedtoward its destination. 5 Routers are thus important pieces of equipmentfor any NREN. Table 3.8 provides an overview of routers and switchescurrently used by NRENs. Note that several NRENs use routers andswitches from more than one manufacturer. Information for each NREN isavailable from the Compendium website.Table 3.7.1 Cross-border Dark FibreLocationNREN to NRENCurrentACONET-SANETVienna, Austria – Bratislava, SlovakiaAMREJ-NIF/HUNGARNETSubotica, Serbia/Montenegro – Szeged, HungaryCESNET-PIONIEROstrava, Cezch Republic – Cieszyn, PolandCESNET-SANETBrno, Czech Republic – Bratislava, SlovakiaDFN-SURFnetMuenster, Germany – Enschede, NetherlandsDFN-SWITCHLörrach, Germany (BelWü) – Basel, SwitzerlandPIONIER-DFNGubin, Poland – Guben, GermanyPlanned for 2006 and AfterBASNET-PIONIERGrodno, Belarus – Kuznica, PolandCESNET-ACOnetBrno, Czech Republic – Vienna, AustriaDFN-PIONIERPomellen, Germany – Kolbaskowo, PolandDFN-RENATERKiel, Germany – Strasbourg, FranceDFN-SWITCHKarlsruhe, Germany – Basel, SwitzerlandGARR-SWITCHMilano, Italy – Manno, SwitzerlandLITNET-PIONIERKaunas, Lithuania – Ogrodniki, PolandPIONIER-UARNETHrebenne, Poland – Rawa Ruska, UkrainePIONIER-DFNSlubice, Poland – Frankfurt(Oder), GermanyRBNet/RUNNet-PIONIERMamonovo, Russia – Granowo, PolandSANET-PIONIERSkaliste, Slovakia – Zwardon, PolandSURFnet-DFNMaastricht, Netherlands – Aachen, GermanyTable 3.8 Routers and SwitchesEU/EFTA countries (27 NRENs in the survey)Vendor Cisco Juniper HP Avici Nortel Extreme Foundry Enterasys MikroTik Tellabs 3Com PlanetNumber of NRENs 24 9 2 1 1 1 1Other countries (18 NRENs in the survey)Number of NRENs 18 2 1 1 1 1 15Source: whatis.techtarget.com47