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VTHD PROJECT (Very High Broadband Network Service): French NGI initiative C. GUILLEMOT FT / BD / FTR&D / RTA christian.guillemot @francetelecom.com Le présent document contient des informations qui sont la propriété de France Télécom. L'acceptation de ce document par son destinataire implique, de la part de ce dernier, la reconnaissance du caractère confidentiel de son contenu et l'engagement de n'en faire aucune reproduction, aucune transmission à des tiers, aucune divulgation et aucune utilisation commerciale sans l'accord préalable écrit de France Télécom R&D France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D1 - 25/05/2017 (Nom du fichier) - D1 - 01/03/2000 Presentation Overview VTHD: french NGI initiative project objectives partnership VTHD network QoS engineering rationale service model implementation issues Provisioning & traffic engineering dynamic provisioning with optical networks Interworking of IP and X-connected WDM networks layer 2 traffic engineering Conclusion 2 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D2 - 25/05/2017 VTHD Project objectives To set up a strong partnership with higher education and research institutions within the framework of french RNRT and european IST networking development programms. Open internet R&D To develop new applications and to ensure that they can be put in use in the broader global Internet. To experiment optical internetworking with two jointed technological objectives: to assess scalable capacity upgrading techniques to assess traffic management tools necessary to operate a QoS capable test-bed. To deploy and operate a high performance network that provides nationwide high capacity interconnection facilities among laboratories at the IP level that supports experiments for new designs for networking. with actual traffic levels consistent with interconnexion capacity. 3 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D3 - 25/05/2017 Partnership & Applications (1) Partnership: France Telecom/FTR&D INRIA (Computering National Institute) & European G. Pompidou Hospital High Telecommunications Engineering Schools: ENST ; ENST-Br ; INT Institut EURECOM (ENST + EPFL: Switzerland) Data applications: Grid-computing (INRIA) . Middleware platform for distributed computing High performance simulation & monitoring 3D virtual environment (INRIA) Data base recovery, data replication (FTR&D) Distributed caching (Eurecom Institute) 4 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D4 - 25/05/2017 Partnership & Applications (2) Video-streaming Video-on-demand, Scheduled live-transmission, TV broadcasting (FTR&D) MPEG 1: ~ 1 Mb/s MPEG 4: <~ 1 Mb/s (adaptative video-streaming, multicast) MPEG 2: ~6 Mb/s : high quality video TV/IP Real time applications Tele-education (High Telecommunications Engineering Schools). Distant-learning,Educational cooperative environment, digital libraries Tele-medecine (INRIA+ G. Pompidou hospital) High-definition medical images distant analysis & processing Surgery training under distant control Voice over IP (FTR&D) PABX interconnection: E1 2Mb/s emulation Adaptative VoIP: hierarchical coding Video-conferencing (FTR&D) 5 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D5 - 25/05/2017 VTHD network 8 points of presence interconnected by an IP/WDM backbone aggregating traffic from campuses using Giga Ethernet p2p access links. Transmission resources (access fibers, long haul WDM optical channels) supplied by France Telecom Network Division on spare resources. VTHD Network management carried by FT operational IP network staff in a « best effort » mode. VTHD network usage No survivability commitment ( neither for links nor routers faults) Acceptable Usage Policy: notifiable « experimentations » partners are committed to have a commercial Internet access 6 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D6 - 25/05/2017 Network Architecture Atrium A weakly meshed topology moving towards • a larger POPs connectivity • and peering with IST Atrium network Backoffice 8 POPs connected to 18 campuses Backbone router access router 7 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D7 - 25/05/2017 VTHD Routers & DWDM systems Cisco 12000 VTHD: A multi-supplier infrastructure FTR&D Cisco 6509 Avici TSR Juniper M40 GigaEthernet STM1/OC 3 Juniper M20 FT/BD 2.5 Gb/s STM-16 POS INRIA 2.5 Gb/s STM-16 POS FTR&D 2.5 Gb/s STM-16 POS 4 channel STM-16 ring FTR&D ENST INRIA INRIA FTR&D INRIA FTR&D FT/BD HEGP ENST INT EURECOM 8 FTR&D INRIA France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D8 - 25/05/2017 VTHD: Routing FTR&D INRIA • IS-IS AS VTHD • I-BGP4 Static FTR&D FTR&D FTR&D E-BGP4 INRIA FTR&D INRIA HEGP INRIA INT ENST ENST FTR&D Protection /IP rerouting RENATER (~ 10 s) 9 Eurécom INRIA France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D9 - 25/05/2017 QoS engineering: rationale Context VTHD: experimental & operational network that encompasses both the core network, the CPEs and the dedicated (V)LANs. that will progressively have FTR&D operational hosts reachibility (VPN engineering permitting) traffic: VTHD network interconnects distributed communities (FTR&D, INRIA, Telecom. Engineering schools) supports bandwidth demanding applications for bulk traffic (metacomputing, web traffic, data base back up) VTHD supports applications that need QoS guarantees : VoIP, E1 virtual leased lines, 3D virtual environment , video conferencing Traffic load is expected to remain low in the VTHD core network with occasional congestion events: a context indicative of actual ISPs backbones. Objective to experiment a differentiated QoS capable platform involving all architectural components, even if their functionalities are basic. 10 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D10 - 25/05/2017 Expected VTHD bulk traffic Bulk traffic is data traffic: « web traffic »: INRIA WAGON tool WAGON is a software tool generating web requests Web browsing user behaviour is simulated using a stochastic process & starting from data traces of actual web servers. Web servers generate actual back traffic to virtual users requests WAGON first objective is web server architecture improvement. Traffic /server: 160 Mbit/s (CPU limited), 7 servers. Web servers Grid computing (INRIA): Grid cluster 1 Gb/s 1 Gb/s Parallel computing using a Distributed Shared Memory between 16 (soon 32) PC clusters. Processes (computing, data transfers) are synchronized by the grid middleware. Data transfers are built on independent PC to PC file transfers Mean traffic level/ cluster transfer: 500 Mbit/s 42 Web clients Data base recovery (FTR&D) 80 Gigabyte transfers (~ few 100 Mb/s ?) 11 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D11 - 25/05/2017 Actual VTHD bulk traffic 12 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D12 - 25/05/2017 QoS Architecture components policy FTR&D directory VTHD directory manager DNS/DHCP : Back Office VTHD BO SLA directory QoS manager correlation engine OSSIP Modelling VTHD PE Switches FE , GE VTHD CPE : Cisco 7206 Policy server operational interconnection facility : Traffic matrix Policy server PHB, AC engineering VTHD backbone measurements 13 Building blocks integral to QoS engine: •VTHD service model (PHB, Admission control) • Performance metering (QoS parameters measurem.) • modelling (traffic matrix, correlation engine) •policy based management (policies,COPS protocol) •SLA France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D13 - 25/05/2017 VTHD backbone Service model (1) 3 service classes mapped to EF and AF Diff Serv classes both for admission control and service differentiation in the core network. Scheme applied at PEs ingress interfaces CPEs in charge of flows classification,traffic conditioning, packet marking. Class 1: Expedited forwarding intended to stream traffic traffic descriptor: aggregated peak rate QoS guarantees: bounded delay, low jitter, low packet loss rate admission control: token bucket (peak rate, low bucket capacity) –suitable to high speed links: individual flow peak rate is small fraction of link rate so that variations in combined input rate remain low Class 3: Best effort intended to elastic traffic no traffic descriptor, no admission control best effort delivery 14 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D14 - 25/05/2017 VTHD backbone Service model (2) Class 2: Assured forwarding intended to elastic traffic that needs minimum throughput guarantee traffic descriptor: ? QoS guarantees: minimum throughput admission control: based on number of active METER EF - Conforming ABSOLUTE DROPPER QUEUE ABSOLUTE Feedback AF1 flows & TCP . ALG. DROPPER COUNTER CLASSIFIER QUEUE SCHEDULER whatever the traffic profile, fair sharing of dedicated bandwidth REMARKING among flows ensures that flow throughput never decreases below some minimum acceptable level for admitted flows (after J.W. BE ALG. DROPPER Roberts) assumes that TCP flow control is good approximation for fair sharing RED algorithm may improve fair sharing by punishing aggressive Feedback QUEUE 3 DS VTHD node flows. Admission control should keep EF & AF cumulative traffic load below congestion and low enough to enable the close loop feedback to take place properly . 15 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D15 - 25/05/2017 Closed loop operation loose traffic engineering Closed Loop Network Operation admission control: hose model PolicyRepository - based on local traffic profile and per interf. SLA - not on global network status - unknown local traffic profile per outgress /destination Accounting Policies Service Model Routing Policies High-Level Policy Recalculation STATE INFO Dynamic Device-Indep. Recalculation traffic dynamics service model to be re-engineered to meet SLAs. - Relevant times scales (minutes to hours) are not consistent with capacity planning. 16 Business Plane LDAP MODIFIED DEVICE INDEPENDENT VALUES - Topology changes may require admission control & Security Policies PERFORMANCE INFO Packet Flow LDAP Management Plane PDP STATE INFO COPS(Report) CONFIGURATION COPS(Decision) NetworkElement IPPM NEW POLICIES Packet Flow PEP Network Plane France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D16 - 25/05/2017 Implementation issues Admission control: EF class: PIRC only supported on GE line cards on Cisco GSR PIRC is lightweight CAR: no access-group, dscp, or qos-group matching is available; rule matches *all* traffic inbound on that interface. AF class: status information on active flows not available (classification and filtering rules enforcement at the flow granularity level with Internet II Juniper processor) AF flows aggregate filtering based on token bucket descriptor – appropriate token bucket parameters ? Performance metering On shelve tools for passive measurements at backbone border are not available at Gb/s rate Policy based management COPS protocol not supported by Cisco GSR, Juniper M40, Avici TSR & many other issues to be addressed: QoS policies, SLA/SLS definition, correlation engine,…. 17 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D17 - 25/05/2017 Dynamic provisioning & optical networks IP pervasiveness & WDM optical technologies are key drivers for: high demand for bandwidth & transmission cost lowering. which in turn lead to exponential traffic growth and huge deployment of transport capacities Exponential nature of traffic growth shifts network capacity planning paradigm from: fine network dimensioning to coarse network dimensioning for pre-provisioned transport networks. Coarse network dimensioning and elastic demand for networking services shift the business model from demand driven to supply driven which in turn calls for. new service velocity : fast lambda provisioning arbitrary transport architecture for scalibility & flexibility: shift from ring-based to meshed topology efficient and open management systems wider SLA capability rapid response to dynamic network traffic and failure conditions 18 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D18 - 25/05/2017 MP(Lambda)S optical networks Soft-ware centric architecture leveraging on IP protocols Distributed link state routing protocol: OSPF, (PNNI) Signaling: Multi Protocol Label Switching (MPLS) / CR-LDP (RSVP-TE) : LDP queries OSPF for the optimal route, resources are checked prior to path set-up IP control network 12 34 …….. …… 12 34 …….. …… 12 34 …….. …… Out of band control channel 12 34 …….. …… « optical » X-connect IP control plane interconnection facility decoupled from data plane. IP router address (control) + “IP” switch address (data) per X-connect. 19 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D19 - 25/05/2017 VTHD Configuration Rennes Paris AUB Rouen 2 3 Sycamore Xconnected network Switch Capability LSA Avici TSR 1 2 Sycamore opaque LSA features Switch IP address Minimum grooming unit supported by the node Identified user groups that have reserved and available grooming resources User groups resources to be pre-emptable Software revision Trunk Group LSA 3 Administrative cost of trunk group Protection strategy for individual trunks within trunk group User group assignment of trunk group Conduit through which the trunks run Available bandwidth of the trunk group Trunk allocated for preemption Avici TSR Paris STL Paris MSO 20 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D20 - 25/05/2017 Dynamic provisioning for trunks TSR Composite Links: bundling of STM16 links Composite link is presented as a single PPP connection to IP and MPLS IP traffic is load balanced over member links based on a hash function Link failures are rerouted over surviving member links in under 45msecs may be faster than restoration at optical level Decoupling of IP routing topology (software/control plane) from router throughput (hardware/data plane). Relevant to IP/WDM backbone router: number of line cards scaled on nbr of x nbr of fibres. - dynamic provisioning for composite link capacity upgrading pre-provisined transport network: capacity pool standard or diversely routed additional link (packet ordering preservation) need signaling between router & optical X-connect. 21 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D21 - 25/05/2017 O-UNI signaling UNI signaling : Optical Network UNI -N ONE: Optical Bootstrap the IP control channel Establish basic configuration Discover port connectivity ND UNI -N UNI UNI -C ND UNI UNI -C Client Neighbor discovery UNI UNI -C ND ONE Client End points Service bandwidth Protection/restoration requirements UNI -N Internal Connectivity ND ND: UNI neighbor discovery Connection creation, deletion, status enquiry Modification of connection properties UNI -N Network Element UNI functions : UNI Client partnership UNI -C Client OIF draft: oif2000.125.3 signaling protocols: RSVP-TE or CR-LDP Avici & Sycamore first release scheduled next June VTHD experiment: Avici/FTR&D/Sycamore Address resolution registration query client addresses type: IPv4, IPv6, ITU-T E.164, ANSI DCC ATM End System Address address , NSAP) COP usage for UNI for outsourcing policy provisioning within the optical domain 22 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D22 - 25/05/2017 Conclusion Where do we stand now French partnership kernel. IP network deployment completed Partners usage and related applications rising up. Sycamore platform lab tests. What ’s to come VPN service provisioning (first IPSEC based then MPLS based) to enable secured usage from « regular » hosts. QoS capable test-bed. IPv6 service provisioning. New applications/services support within the RNRT/ RNTL or IST framework ? 23 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D23 - 25/05/2017 Thank you! 24 France Télécom R&D La communication de ce document est soumise à autorisation de FTR&D © France Télécom - (Nom du fichier) - D24 - 25/05/2017