Rudolf Roth, Michael Smirnov, Henning Sanneck, Dorota Witaszek GMD FOKUS

1. IP Multicast Services over ATM for Broadband Collaborative Engineering — Experience from the MULTICUBE Project Rudolf Roth, Michael Smirnov, Henning Sanneck, Dorota Witaszek GMD FOKUS Luca Salgarelli, A. Corghi; CEFRIEL ACTS Multicube

2. ACTS Project AC012 Multicube • efficient multipoint to multipoint broadband switched network services for distributed Multimedia applications • industrial partners from automotive and aerospace industry • experiments with transeuropean ATM connectivity for collaborative engineering • experiment scenarios for Collaborative Engineering, Teletesting, Distributed Simulations • development • ATM multicast server node • UNI and NNI signalling for meshed pt-to-mpt connections • study of Enhanced IP over ATM

3. Contents • Internet Integrated Services over ATM • The MIS Architecture • Main Components • The Quantized Heterogenity Service Model • Prototype Implementation Environment • Conclusions

4. Internet integrated Services over ATM • Internet Integrated Services (IIS) • Best Effort / Controled Load Service / Guaranteed Services • RSVP for IIS signalling • IP multicast aware • IIS over ATM • mapping IP flows onto point-to-multipoint SVCs • cut-through connections across ATM cloud • internetworking with other networking technologiessender / receivers directly attached ATM host or ingress / egress routers • Central Issues • QoS mapping: GS / CLS / BE --> CBR, rt-VBR, nrt-VBR, ABR, UBR • Traffic management: set up / release of QoS SVCs

5. Roadmap to IETF Working Groups for IIS • ION (Internetworking over NBMA [non-broadcast multi-access]) • Classical IP over ATM, NHRP, MARS • IntServ (Integrated Services) • specification of enhanced Internet Service Model • ISSLL (Integrated Services over Specific Link Layers) • ISATM subgroup: • framework for IntServ & RSVP over ATM • CLS & GS with ATM (QoS param mapping) • RSVP over ATM Implementation Requirements

6. Support for IP Multicast + Integrated Services in ATM Networks • needed for • IP multicast handling: • group membership • QoS aware Multicast Address Resolution Service:QoS level tracking and management • RSVP handling • RSVP processed by each hops in PATH • but ATM cloud represents single collapsed hop • transport of RSVP packets • processing of RSVP reservations

7. ACTS Project Multicube • Multicube EnhancedIP over ATM == IP multicast and QoS in ATM networks • MIS architecture: comprehensive Support Solution for IntServ in ATM networks(submitted as internet-draft to issll) • Quantized heterogenity model: efficient support for QoS in ATM cloudsallowing heterogeneous QoS levels per group • prototype implementation and proof of concepts in demonstration environment

8. MIS Architecture • server based solution • MIS multicast integrated server for MLIS • design principles: • no modification of protocols (RSVP, address resolution, ..) • clear conceptual separation of L2/L3 issues • cooperation of address resolution and reservation set-up • independence of QoS service model • components: • EARTH-SQoS-aware MARP Server based on EARTH protocol • RSVP-Server • Interworking functions • layer 3 / layer 2 QoS management • remote CAC concept

9. EARTH-S • RFC 2022 MARS: multicast ATM ARP service • EARTH protocol: extension of MARS functionality • MLIS conceptmulticast VC cut-thru connections across LIS's • Support for Source-specific subgroups (SSG, registration by IGMPv3) QoS-specific subgroups (QSG, registration by RSVP)

10. RSVP-S • RSVP (control) messages transported on distinct path from data messages • processing of PATH msg's • replication, modification, distribution • processing of RESV msg's • merging and forwarding • resource reservation policy enforcement • policing • filtering • capacity admission control

11. sender MIS receiver PATH PATH(ADSPEC) RESV translateQoS EARTH_query remote CAC EARTH_multi EARTH_qos_notify CAC result RESV MIS operation overview

12. Quantized Heterogenity Service Model • extreme cases • full: potientially separate VCs for all receivers • limited: BE + single QoS VC only • Quantized model: • small set of QoS levels allowed • ADSPEC adds constraints to PATH msgs S LIS B LIS A

13. Prototype Implementation Environment • MIS implementation currently under development(preversion for RSVP unicast / BE multicast exist) • Sun Solaris 2.5, FORE ATM SBA200E, ForeThough 4.1 +host driver extensions for point-to-multipoint connections • MINT (multimedia internet terminal)conferencing toolset • adaptive audio / video communication • RSVP control interface • session invitation, floor control

14. Summary • Framework for Integrated Services and RSVP over ATMunder development by IETF ISSLL working group • MIS Architecturea solution developed by the ACTS Project Multicubesubmitted issll internet-draft • Server-based approach integrating resource reservation and multicasting • integrated prototype to be ready by Apr. 98 • extensive experiments in final phase of Multicube • Visitors to our next Multicube Workshop are welcome !! contact: Jacopo.Corridoni@CSELT.IT