May 2001GRNET GRNET2 Designing The Optical Internet of Greece: A case study Magda Chatzaki Dimitrios K. Kalogeras Nassos Papakostas Stelios Sartzetakis

May 2001GRNET Structure Current Status Basic Design Principles for GRNET2 Implementation Considerations of the 2-layer Architecture for GRNET2 Implementation Plan

May 2001GRNET Current Status Fairly homogeneous infrastructure –c75xx, Fore ASX-200BX IP over ATM over SDH Technological limits (SAR limits) No Qos, no service differentiation Inefficient capacity allocation and bandwidth management mechanisms No IP VPNs

May 2001GRNET 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

May 2001GRNET Two Layer Architecture Overview of the existing high speed NRN network upgrades (Canet3, Abilene) Backbone and access network Backbone capacity = w * Σ access capacity

May 2001GRNET 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: 1.Overprovisioning 2.QoS

May 2001GRNET Support of QoS Differentiation QoS and CoS differentiation at layer 3 (i.e. IP QoS) traffic identification, classification and policing on IP layer Vendor specific or independent (WFQ, WRR, RED or WRED ) End-to-End architecture (virtual wire ?) Min. Guarantee for BW, packet loss (delay ?)

May 2001GRNET 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.

May 2001GRNET Internet connectivity Downstream congestion on the international lines Bandwidth management mechanism to its customers according to a predefined policy

May 2001GRNET Advanced services IPv6 (desired) VPN service on λ provisioning and management of guaranteed BW between the access points and the backbone network Large scale conference

May 2001GRNET 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

May 2001GRNET Core – Access Arch. (WAN layout) Athens Crete Thessaloniki Xanthi Ioannina Larissa Patra

May 2001GRNET GigaPoP General Layout

May 2001GRNET Distributed Gigapop (MAN)

May 2001GRNET 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)

May 2001GRNET MANs

May 2001GRNET ATHENS MAN Physical topology

May 2001GRNET Athens GRNET GigaPoP

May 2001GRNET Athens MAN WDM network (1) λ Service Provider building/ WDM equipment GRNET IP Equipment GRNET Customers’ Equipment (Universities, Research Institutes)

May 2001GRNET 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

May 2001GRNET 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)

May 2001GRNET 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)

May 2001GRNET 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

May 2001GRNET IP CoS implementation Min. Guaranteed capacity service (IP +) Voice over IP service Internet connectivity capacity management service Number of Classes not yet resolved

May 2001GRNET Implementation Plan Study phase end by Q Infrastructure RFP by Q λ provisioning starting by Q Cost 30 M Euros 75 % by EU, 25 by National sources

May 2001GRNET Thank You!