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Controlled Load Service QoS Model draft-kappler-nsis-controlledload-qosm-03.txt

Controlled Load Service QoS Model draft-kappler-nsis-controlledload-qosm-03.txt. Cornelia Kappler, Xiaoming Fu (Robert Hancock presenting) IETF#65 – Dallas March 2006. Overview. Goals Controlled load service QoSM Draft Updates Open Issues Next steps. Goals.

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Controlled Load Service QoS Model draft-kappler-nsis-controlledload-qosm-03.txt

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  1. Controlled Load Service QoS Modeldraft-kappler-nsis-controlledload-qosm-03.txt Cornelia Kappler, Xiaoming Fu (Robert Hancock presenting) IETF#65 – Dallas March 2006

  2. Overview • Goals • Controlled load service QoSM • Draft Updates • Open Issues • Next steps

  3. Goals • NSIS base protocol suite is in final stages • Controlled-load service: a light-weight per-flow reservation model • Much simpler than guaranteed service • A useful example for NSIS deployment especially in access networks • CLS QoSM is about: • How to interpret QoS parameters in conjunction with NSIS QoS signaling in a way which replicates RSVP/IntServ behaviour

  4. CLS QoS Model • Token bucket parameters • QSPEC control information • MTU not included • As per Interim meeting consensus – but see later • Traffic control rules • Scheduling • Excess treatment

  5. Draft Updates After discussions at Paris meeting: • Update with detailed QOSM parameter mappings with RFC2211 • Updated Appendix: gives more detailed QOSM for both • sender-initiated reservations, and • RSVP-fashion receiver-initiated reservations

  6. Half-Open Issues • Three options for constructing QoS-NSLP-QUERY messages like RSVP-PATH messages: • Token bucket (QNE-readonly) + available bandwidth (QNE-RW) should probably be used • How exactly to interoperate with RSVP/IntServ • Basically, service translation is not a problem, but the interworking with RSVP/IntServ may need further study • The flexibility of QoS NSLP on reservation initiator can bring IntServ potentially more supporting scenarios • Some design freedom (e.g. on sender-initiated case)

  7. Next Steps • Still some protocol fine-tuning • Update following QoS-NSLP finalisation • Verify scope • Is this refining the definition of CLS? Or just providing new freedom for how to invoke it? • Start considering CL-ECN extensions? • Should it be accepted as a WG item?

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