GR NET2 Designing The Optical Internet of Greece: A case study

1. GRNET2Designing The Optical Internet of Greece: A case study Magda ChatzakiDimitrios K. Kalogeras Nassos Papakostas Stelios Sartzetakis GRNET

2. Structure • Current Status • Basic Design Principles for GRNET2 • Implementation Considerations of the 2-layer Architecture for GRNET2 • Implementation Plan GRNET

3. Current Status • Fairly homogeneous infrastructure • c75xx, Fore ASX-200BX • IP over ATMover SDH • Technological limits (SAR limits) • No Qos, no service differentiation • Inefficient capacity allocation and bandwidth management mechanisms • No IP VPNs GRNET

4. Basic Design Principles for GRNET2 • optical transmission • Fiber lease or λ provisioning • λ creation through management system • Minimization of overlay technologies • link layer protocol consideration PoS (without Sonet layers), GigE, SRP GRNET

5. Two Layer Architecture • Overview of the existing high speed NRN network upgrades (Canet3, Abilene) • Backbone and access network • Backbone capacity = w * Σ accesscapacity GRNET

6. Design, Dimensioning and QoS Provisioning • Suboptimal path selection with existing network routing protocols • IP traffic engineering - Native MPLS (VPN, TE) • No clear results based on aggregation of access traffic characteristics • Results: • Overprovisioning • QoS GRNET

7. Support of QoS Differentiation • QoS and CoS differentiation at layer 3(i.e. IP QoS) • traffic identification, classification and policingon IP layer • Vendor specific or independent (WFQ, WRR, RED or WRED) • End-to-End architecture(virtual wire ?) • Min. Guarantee for BW, packet loss (delay ?) GRNET

8. Support of QoS – cont. • regulatory infrastructure (DEN ?) • administrative mechanisms for access regulation of network resources based on categories such as users, hosts, applications, accounts, etc. GRNET

9. Internet connectivity • Downstream congestion on the international lines • Bandwidth management mechanism to its customers according to a predefined policy GRNET

10. Advanced services • IPv6(desired) • VPN serviceon λ • provisioning and management of guaranteed BW between the access points and the backbone network • Large scale conference GRNET

11. GigaPoPs and Physical Layer • GigaPoP: a distributed switching and routing infrastructure • DWDM with PoS encapsulation for WAN and GigE for MAN • N x 2.5 Gbps speeds • Gigapop in three cities • A Gigabit Ethernet switch for providing high speed in the access network GRNET

12. Core – Access Arch. (WAN layout) Xanthi Thessaloniki Ioannina Larissa Athens Patra Crete GRNET

13. GigaPoP General Layout GRNET

14. Distributed Gigapop (MAN) GRNET

15. MAN characteristics • Ring topology • access of customer networks= GigE • Protected Access (e.g. IEEE 802.1d spanning – tree) • VPN services to its customers = separate optical paths in a mesh or ring topology • MAN infrastructure (GigE Switch, Router+GigE) GRNET

16. MANs GRNET

17. ATHENS MAN Physical topology GRNET

18. Athens GRNET GigaPoP GRNET

19. Athens MAN WDM network (1) λ Service Provider building/ WDM equipment GRNET IP Equipment GRNET Customers’ Equipment (Universities, Research Institutes) GRNET

20. Athens MAN Requirements (1) • Mandatory/Desirable requirements • Fiber infrastructure • >= G.652 (Dispersion Un-shifted Fiber) • Testing tools for optical parameters’ measurement • 2 optical paths for each access node • avoid Single Points of Failure • Access node distance from WDM core < 10 km • Support for 15 Access Nodes GRNET

21. Athens MAN Requirements (2) • WDM Networking equipment • Frame+bit-rate independent all-optical λ service • Co-location of GRNET IP equipment with WDM • 2,5 Gbps physical ring upgradable to 10 Gbps • Wavelength Adaptation capable (via transponders) • Spare λ for testing purposes • Embedded system upgradeable • Multiple frames in a single wavelength (D) • Optical switching/conversion (D) • Support of “Digital Wrapper” (D) GRNET

22. Athens MAN WDM network (2) • Core WDM Network composed of a ring of re-configurable OADMs • 80 km optical ring with 10 OADMs (no regeneration) • 2,5 Gbps ports (upgradeable to 10Gbps) • 1-32 λ per node • 100 Ghz spacing • Add/drop up to • 160 Gbs (upgradeable to 640 Gbps) • Tx/Rx Line - up to • 80 Gbps East (upgradeable to 320 Gbs East) • 80 Gbs West (upgradeable to 320 Gbs East) GRNET

23. Athens MAN WDM network (3) • Multi rate (up to 2,5 Gbps) 3R Transponders supporting Gigabit Ethernet, SDH frames, ATM etc. including 24 Transponder Shelf • Offers OCh SNC protection – will not be used by GRNET • Network Management System – Access to the NMS is negotiable • Configuration Management • End-to-end OCh SNC provisioning • Fault Management • Alarm Reporting/Filtering • Performance Management • Client layer monitoring • Future upgrade will support Digital Wrapper GRNET

24. IP CoS implementation • Min. Guaranteed capacity service (IP +) • Voice over IP service • Internet connectivity capacity management service • Number of Classes not yet resolved GRNET

25. Implementation Plan • Study phase end by Q2 2001 • Infrastructure RFP by Q3 2001 • λ provisioning starting by Q4 2001 • Cost 30 M Euros 75 % by EU , 25 by National sources GRNET

26. Thank You! GRNET