Dynamic Management for End-to-end IP QoS From Best-effort to Personalized Services Fayçal Bennani & Noëmie Simoni ENST TNC 2000 - Lisbon, 23 May 2000.

Problematic From best-effort to multi forwarding service From connectionless to tunneling From per-hop to end-to-end services From user’s flow to CoS flow From best-effort to personalized services. TNC 2000 - Lisbon, 23 May 2000.

Content Problematic QoS in IP: today’s solutions QoS in IP: key points Components to support QoS Proposition of management components Dynamic management for end-to-end IP QoS: a solution in five models Conclusion TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: today's solutions Topology-based systems: IP over ATM, MPLS, Flow-oriented solutions: IntServ, DiffServ. TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: today's solutions IP over ATM On-demand VCs with specific QoS Various traffic classes: CBR, rt-VBR, nrt-VBR, ABR, UBR. TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: today's solutions MPLS Traffic aggregates are associated with LSPs (Label-Switched Path) The label used for switching is associated with a FEC (Forwarding Equivalent Class) TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: today's solutions IntServ QoS per individual flow: each application makes a reservation request for the resources it needs. Use of signaling protocols (RSVP) Issue of scalability TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: today's solutions DiffServ The DiffServ architecture defines service classes based on a classification of flows. Repartition among edge and core devices: peripheral nodes set the DSCP, core nodes implement PHBs (Per-Hop Behavior) to deliver a differentiated service at the node output: (default (best effort), expedited forwarding (EF), assured forwarding (AF)) TNC 2000 - Lisbon, 23 May 2000.

QoS in IP : key points CoS flow A set of transfer units considered related to each others. Packets are considered to belong to a same flow according to quantitative observations, like: being generated by the same user, being generated by the same application, coming from the same originating network, having the same destination, requiring the same CoS. TNC 2000 - Lisbon, 23 May 2000.

QoS in IP: key points Per-domain organization Domain A Domain C Domain B TNC 2000 - Lisbon, 23 May 2000.

Architectural Components to support QoS LAN WAN Conditionner: Metering Dropping Remarking Contrat verification Conditionner: Shaping Formating Identification, QoS selection Classifier: BA, MF Queuing Access and congestion management Scheduling TNC 2000 - Lisbon, 23 May 2000.

Proposition of dynamic management components Control Plane Management Plane Mapping Few ms to few sec Few sec to few min Hours / Days Days / Weeks Renegotiations Notifications Traffic engineering Monitoring analysis UMD Policy (COPS) Signaling (RSVP) Negotiation Time less than a ms User Plane Buffering Conditioning Classification Congestion control Retransmissions TNC 2000 - Lisbon, 23 May 2000.

Dynamic Management for End-to-end QoS: a solution in five models TNC 2000 - Lisbon, 23 May 2000.

Management organizational model BM QB Domain A Domain C Domain B TNC 2000 - Lisbon, 23 May 2000.

Functional Model Negotiation function Mapping function Re-negotiation function TNC 2000 - Lisbon, 23 May 2000.

Architectural Model Notifications and monitoring between a core router and its QB, Notifications from QBs to the BM, Anticipation strategy made by the BM may include routing tables updates, monitoring needed to evaluate the long term impact of the strategic anticipations made by the BM. TNC 2000 - Lisbon, 23 May 2000.

Relational Model How to make relations among the various components that cooperate to grant and maintain an end-to-end QoS ? In-band communication: OAM flows MPLS with its Label Distribution Protocol (LDP) Out-band alternatives: TMN compliant architectures (SNMP, CMIP) TNC 2000 - Lisbon, 23 May 2000.

Informational model: QoS Informs about a contract QoS evaluation through generic criteria Requested QoS must be mapped to CoSs Significant parameters of each visibility level Flow characterization is domain dependent. TNC 2000 - Lisbon, 23 May 2000.

Conclusion QoS-enabling components time Vs planes classification Interconnection units perform renegotiations and mapping functions A distributed management between QBs, BM and boundary nodes. TNC 2000 - Lisbon, 23 May 2000.

Perspectives Development of managing objects (for mapping and renegotiations). Investigation of potential enhancements with new technologies TNC 2000 - Lisbon, 23 May 2000.

Thank you. TNC 2000 - Lisbon, 23 May 2000.