INTSERV/DIFFSERV Group Activities

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1 Programma di Ricerca Scientifica di Interesse Nazionale Tecniche per la garanzia di qualità in reti di telecomunicazioni multiservizi INTSERV/DIFFSERV Group Activities

2 Group Composition Università di Bologna Politecnico di Milano Università di Pisa Università di Roma La Sapienza

3 Main Goals Theoretical studies QoSinIPnetworks» Integrated Services (IntServ) architecture» Differentiated Services (DiffServ) architecture» Evolution towards optical packet switching Experimental activities implementation of local test-bed Tests and measurements

4 Theoretical Studies Inteworking between IntServ and DiffServ paradigms Resource allocation Deterministic approach Statistical approach

5 Interworking IntServ/DiffServ: Network Scenario Bandwidth Broker Host RSVP based access networks R ED ED R R R ED ED DS-R Diff-serv cloud DS-R ED ED R R ED: Edge Device DS-R Diff-ServRouter R: RSVP capable router User flows SACP protocol RSVP relationship

6 Theoretical Studies Shaping and policing for EF and AF PHBs Source characterization and policing Application of DiffServ model to optical switching architectures

7 Assured Forwarding 2Mbit/s TCP/IP Sources AF Token Bucket Token Bucket Token Bucket 34 Mbit/s TCP/IP sources supported by the AF service Best Effort background traffic (optional) IP buffer Token Bucket used as TCP/IP Sources BE Discarding priority IP access router integrated policer shaper

8 DiffServ in Optical Packet Switching Packet Encoder Packet buffer Packet selector Solutions for: Expedited Forwarding Assured Forwarding CONTROL Optical implementation of RED technique: packet marking non FIFO policies

9 Experimental Activities Implementation of IP traffic generator Performance measurements of packet scheduling algorithms CBQ implementations Commercial IP routers

10 Experimental Activities Implementation of RSVP-ATM Edge Device (HED) and RSVP Manager Module (RMM) Test of IntServ and DiffServ paradigms Local area Geographical link

11 Local Test Bed - Pisa Radiology department subnet jebediah HED20 Sun Sparc baseTX FORE ATM NIC Misure sul CBQ FORE ATM NIC 10baseT HP Internet Advisor TLC lab subnet Newbridge CS 3000 Workgroup RSVP host (source) switch Sun UltraSparc 1 remote link CS 1000 WGS RSVP host (receiver) Sun UltraSparc 5 barney Linux PC (Background traffic source) FORE ATM NIC HP BSTS Background cell flow source/receiver FORE ATM NIC brockman Linux PC (Background traffic receiver)

12 Local Test Bed - Roma End User Terminal End User Terminal IntServ Cloud Edge Device Edge Device IntServ Cloud Traffic generator / monitor Traffic generator DiffServ Cloud DiffServ Router Traffic generator / monitor

13 LocalTestBed-Bologna ROUTER 7200/7500 BACKBONE DI TEST TF-TANT(TERENA+DANTE) (F,A, D,GR, I, NL, CZ,CH) TAM ATM WS GARR-B INGEGNERIA Almanet SWITCH DI TEST INFN/CNAF ROUTER 7200/7500 ATM TAM BASATA SU ATMosfera

14 Session Agenda Subsession A - Theoretical Aspects » Shaping and Policing for EF and AF PHBs (Politecnico di Milano) » Delivering Statistical QoS Guarantees using EF PHB in a DiffServ Network (Univ. di Roma) » Differentiated Services in an Optical Internet Backbone (Univ. di Bologna) : Coffe Break

15 Session Agenda Subsession B - Implementation and Experimental Aspects » Implementation and Experimental Activity in IntServ and DiffServ Frameworks (Univ. di Pisa) » Traffic generators and performance measures in DiffServ networks (Univ. di Roma) : Discussion

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