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Resource Management for Dynamic Service Chain Adaptation

Resource Management for Dynamic Service Chain Adaptation. draft-lee-nfvrg-resource-management-service-chain-01. S. Lee (ETRI) seungiklee@etri.re.kr S . Pack (Korea Univ.) shpack@korea.ac.kr M.-K. Shin (ETRI) mkshin@etri.re.kr E. Paik (KT) eun.paik@kt.com. NFVRG@IETF-92. At IETF-91. Goal

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Resource Management for Dynamic Service Chain Adaptation

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  1. Resource Management for Dynamic Service Chain Adaptation draft-lee-nfvrg-resource-management-service-chain-01 S. Lee (ETRI) seungiklee@etri.re.kr S. Pack (Korea Univ.) shpack@korea.ac.kr M.-K. Shin (ETRI) mkshin@etri.re.kr E. Paik (KT) eun.paik@kt.com NFVRG@IETF-92

  2. At IETF-91 • Goal • NFV Resource management for optimizing NFP (Network Forwarding Path) • Use cases • fail-over, traffic optimization, load balancing, energy efficiency • NFP adaptation (update) • 1) monitor VNF-I & VL • 2) select VNF-I • 3) replace VNF-I & VL • SFC applicability • at control-plane architecture < fail-over use case >

  3. Problem refined • Resource scheduling is needed due to: • VNF-Is and VLs shared by multiple NFPs of different Network Services • dynamic states of NFV resources • NFP update vs. VM scaling • Focusing on NFP only • NFP construct or update by selecting existing VNF-Is • VM scaling or allocation is already covered in cloud computing

  4. +2 Use Cases • Path optimization • NFP construction (or update) by selecting VNF-Is and VLs considering processing power, bandwidth, latency, etc. • For end-to-end QoS • End-point mobility • NFP update by relocating VNF-Is at changes of network attachment point of the end

  5. Applied to a SFC I-D • draft-ww-sfc-control-plane-04 • 5.4. Service Function Path Adjustment • Collect and monitor states and attributes of SFIs and overlay links • Evaluate SFIs and overlay links based on the monitoring results • Select SFIs to re-determine a SFP according to the evaluation results • Replace target SFIs (e.g., in a failure or overloaded) with newly selected ones • Enforce the updated SFP for upcoming SFC traversal to SFFs; or to the SFC Classifier Node

  6. Issues • Resource allocation is NP-hard • trying to address the problems with heuristic approaches in the draft • other contributors for detailed algorithms? • Seamless VM migration at VNF-I replacement • Document scope • target on architectural contribution • use cases & algorithms • contribution to SFC control plane • NFP update vs. VNF-FG update or VM scaling

  7. Next Step • Problem articulation from top to bottom • Simulation results • Prototyping within OPNFV and ODL • Any other contributors? • Adopt as RG draft

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