1 / 26

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

GR NET2 Designing The Optical Internet of Greece: A case study. Magda Chatzaki Dimitrios K. Kalogeras Nassos Papakostas Stelios Sartzetakis. Structure. Current Status Basic Design Principles for GRNET2 Implementation Considerations of the 2-layer Architecture for GRNET2

lucus
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related