1. Optical networking in CESNET Jan Radil, Stanislav Šíma, Lada Altmanová jan.radil@cesnet.cz

2. Dark fibres

3.  Connect every PoP of CESNET2(3) gigabit network, distances up to 300 km  Double access to PoPs – restoration, no single point of failure  Access to CzechLight center in Praha (and other cities in the future)  GE and SDH/SONET

4. Dark fibres  HW used  Cisco routers and switches  Keopsys optical amplifiers  Nbase-Xyplex convertors (SM-MM, to one fiber, lambdas)  Information about HW & DF in your networks?

5. CESNET2 topology

6. CzechLight  Participation in international project StarLight, NetherLight, now CzechLight  „lambda service“ with Cisco ONS 15454  2.5 G lambda to Amsterdam  Operational since January 2003  Access to Amsterdam, Geneva, Chicago  TDM box, high-end router is needed

7. 10 Gigabit Ethernet  Negotiation of contract for HW  Catalyst 6503 with ER modules (1550 nm)  Optical amplifiers, fiber test-beds prepared  First 10 GE backbone line is operated by PASNET (metropolitan acadamic network)  1310 LR modules, 1 fibre transmission, passive splitters, length 6 km

8. 10 Gigabit Ethernet

11.  Similar scenarios as with testing 1 GE (NIL)  Some results (1GE) published on Terena 2002  More detailed paper on Terena 2003  Simulating SW – problems with parameters of lasers used in „standart“ equipment (central wavelength, chirp, stability)  DWDM lasers preferred for long-distance transmissions

12. 10 Gigabit Ethernet  In my opinion, we can go over 40 km  Again, our goal is Nothing-In-Line solution