The SEEREN initiative is co-funded by the European Commission under the FP5 contract IST-2001-38830

www.seeren.org

SEEREN

A regional MPLS-based network in SE Europe

Jorge-A. Sanchez-P., Constantinos Kotsokalis - GRNETKonstantinos Anagnopoulos, Panagiota Bosdogianni - ISTF

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Introduction

SEEREN: South-Eastern European Research and Education Network

Built in 2003, operates through 2004Funded by the E.C. under IST programmeConsortium includes: GRNET, HUNGARNET/NIIF, RoEduNet, INIMA, BIHARNET, ISTF (formerly ICTDA), MARNET, AMREJ, DANTE, TERENAhttp://www.seeren.org

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Objective

Ease the digital divideConnect beneficiaries to GEANTCreate an infrastructure for e-Science applicationsSupport the advance of technical know-how in the area

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Topology

BeneficiariesINIMA (Albania)MARNET (FYR of Macedonia)BIHARNET (Bosnia – Herzegovina)AMREJ (Serbia – Montenegro)ISTF (formerly ICTDA, Bulgaria)

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Physical Topology

CapacitiesINIMA: 2 Mbps (1xE1)MARNET: 4 Mbps (2xE1)BIHARNET: 2 Mbps (1xE1)AMREJ: 34 Mbps (1xE3)ISTF: 18-34 Mbps (ATM, shaped, 24 Mbps median throughout the project)RoEduNet (backup link): 34 Mbps (ATM, shaped)

Terrestrial links onlyEquipment donation by Cisco (worth €120.000)

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Physical Topology (2)

Backbone provided by OTEGlobe after tenderBased on OTEGlobe’s MultiServices Platform (MSP)

MPLS-based22 POPs world-wide

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Physical Topology (3)

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Logical Topology

2 VPNsIntra-NREN traffic & traffic towards GEANTBackup to RoEduNet

Used only when GRNET links to GEANT fail

Any-to-any eBGP sessions between the connected partiesIntegrate with the MSP to create logical network

MSP functions as a “black-box”

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Logical Topology (2)

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Architecture

Carrier supporting Carrier – CsCA way for service providers to allocate VPNs for other service providersSub-carrier’s customer traffic encapsulated in MPLS labels, thus eliminating management complexity LSPs extended to CEsLabels exchanged not only within the MSP but also between PEs and CEs (LDP or BGP+labels)

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Architecture (2)

Carrier supporting Carrier – CsC (cont’d)Routes of the edge service provider or its clients are not propagated to the core networkRemoves from the clients the burden of configuring, operating and maintaining their backbone’s connection to the core network

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Acceptance tests

Rude / Crude used (open-source software)Client & server connected on the CEs when possibleBenchmarked 50%, 100%, 110% and 120% of each link’s capacity Packet sizes varied in accordance to RFC-2544

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Acceptance tests (2)

Rude does not take into account (OSI) Layers 2-4 overheadCalculations to generate all correct combinations required

Rude performs rounding!Cross-checking generator and collector logs explains minor packet loss near full capacityStrange results (throughput slightly larger than theoretical) also explained by rounding

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Acceptance tests (3)

Capacity Pkt size Pkts recvd Pkts OoS Pkts Lost Total bytes Throughput (Mbps) Expected (Mbps) Real/Expected50% 64 1071429 0 0 31071441 517844 4,142752 509765 4,07812 102%50% 128 530892 0 82 49372956 822866 6,582928 817382 6,539056 101%50% 256 264318 0 0 58414278 973527 7,788216 971191 7,769528 100%100% 64 1798769 0 344088 52164301 863443 6,907544 1019531 8,156248 85%100% 128 1071418 0 10 99641874 1672000 13,376 1634765 13,07812 102%100% 256 530974 0 0 117345254 1955820 15,64656 1942382 15,539056 101%

Utilization: 50%

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Production stage

SEEREN performing very wellSLA reports: 100% availability for all links for the last 3 months

CsC not hindered by heterogeneity of CEs (7500, GSR, Cat6500 w/ MFC2, others)Collaborative management

Stay tuned for Octavian Rusu’s (RoEduNet) presentation!

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Conclusion

SEEREN extends GEANT to the BalkansIs built on OTEGlobe’s MPLS-based MSPCarrier supporting Carrier usedMultihop eBGP integrates with the MSP to create a mesh (logical network)

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Credits

Technical work carried out by:NREN APMs & colleagues

AMREJ: Slavko Gajin, Djordje VulovicBIHARNET: Edin SilajdzicGRNET: Andreas PolyrakisINIMA: Neki Frasheri, Dashamir HoxhaISTF: Vedrin Jeliazkov, Hristo TurlakovMARNET: Goran MuratovskiRoEduNet: Octavian Rusu, George Bulescu, Cristian Orban

OTEGlobeKostas AnagnopoulosPanagiota Bosdogianni

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http://www.seeren.org

Thank you for your attention!