Computer Network NFV Management and Orchestration.pdf
- 1. ETSI NFV Management and Orchestration - An Overview Mehmet Ersue ETSI NFV MANO WG Co-chair (mehmet.ersue@nsn.com) IETF #88, Vancouver, Canada
- 2. Virtualization as a Paradigm Virtual Machine Guest OS Guest Applic ation Virtual Machine Guest OS Guest Applic ation Virtual Machine Guest OS Guest Applic ation NF: Network Function VNF: Virtual Network Function NC: Network Controller VN: Virtual Network Virtualiz ation and Applicati on Manage ment Hardware Host OS Hypervisor Cloud Stack, Open Stack Cloud API VNF VN VN NF NF VN NaaS IaaS NC VNC Virtual Machine Guest OS Guest Applic ation Examples of VNFs: • Switching: BNG, CG-NAT, routers. • Mobile network nodes: HLR/HSS, MME, SGSN, GGSN/PDN-GW, RNC. • Home routers and set top boxes. • Tunnelling gateway elements. • Traffic analysis: DPI. • Signalling: SBCs, IMS. • Network-wide functions: AAA servers, policy control. • Application-level optimisation: CDNs, Load Balancers. • Security functions: Firewalls, intrusion detection systems. Virtual Network Functions (VNF) 2
- 3. Network Function Virtualization Components NFV Infrastructure (NFVI) Compute Storage Network HW Resources Virtualization Layer Virtualization SW Virtual Compute Virtual Storage Virtual Network Virtual Resources Logical Abstractions Network Service VNF VNF VNF VNF VNF Logical Links VNF Instances VNF VNF VNF SW Instances VNF : Virtualized Network Function VNF End Point End Point E2E Network Service VNF Forwarding Graph aka. Service Chain 3
- 4. Example of an E2E Network Service with VNFs and nested VNF Forwarding Graphs End Point VNF-1 VNF- 2C PNF-3 VNF- 2A VNF- 2B Virtualisation Layer VNF-FG-2 End-to-end network service Physical link Logical link Virtualisation VNF-FG End Point NFVI-PoP Hardware Resources in Physical Locations Legend Source: ETSI NFV E2E Architectural Framework 4
- 5. MANO Functional Blocks • NFV Orchestrator: – on-boarding of new Network Service (NS), VNF-FG and VNF Packages – NS lifecycle management (including instantiation, scale-out/in, performance measurements, event correlation, termination) – global resource management, validation and authorization of NFVI resource requests – policy management for NS instances • VNF Manager: – lifecycle management of VNF instances – overall coordination and adaptation role for configuration and event reporting between NFVI and the E/NMS • Virtualised Infrastructure Manager (VIM): – controlling and managing the NFVI compute, storage and network resources, within one operator’s infrastructure sub-domain – collection and forwarding of performance measurements and events 6
- 6. NFV Management and Orchestration Architecture VNF Virtualised Infrastructure Manager (VIM) VNF Manager (VNFM) NFVI Execution reference points Main NFV reference points Other reference points EMS VNF Catalog Or-Vi VeNf-Vnfm Os-Nfvo VeEn-Vnfm Nf-Vi Vn-Nf NFV Orchestrator (NFVO) NFV-MANO OSS/BSS NFVI Resources Or-Vnfm Vnfm-Vi NFV Instances NS Catalog Source: ETSI NFV MANO WI document (ongoing work) 5
- 7. NFV Entities to deploy and manage • Network Service (NS): – described by its descriptor file, orchestrated by NFVO, – may cover 1 or more VNF Graphs, VNFs and PNFs. • VNF Forwarding Graph (VNF-FG): – described by its descriptor file, orchestrated by NFVO, – may cover VNF-FGs, VNFs and NFs • VNF: – described by its descriptor file, instantiated by the VNF Manager, – covers VNF components (VNFC) each mapped to a VM described with the Virtual Deployment Unit descriptor. VNF NetworkService 1..n VNF Forwarding Graph 1 1..n 0..n 7
- 8. Overview of MANO Descriptor Files 8 VNF Forwarding Graph: -‐ E2E Service Description & KPIs -‐ Info about Component VNFD , PNFD, and associated Links -‐ Inter NF KPIs with dependent VNFs /PNFs in service graph VNFFG Virtual VNF Link Descriptor: -‐ Link type (eg Point to Point , Multipoint) , Inter VNF, & VNF to legacy network links, SAN -‐ KPIs (eg Bandwidth , QoS , Latency) -‐ Network type (Hypervisor vSwitch, NIC eSwitch, Cluster VEPA or FCoE/IB, WAN) VVLD Virtual Network Function Descriptor: • Compute requirements and SLAs • For each Component sub functions, (eg Processing, memory, Storage access requirements & SLAs) • Reliability SLAs/class • Intra VNF component links VNFD Physical Network Function Descriptor: • Reliability SLAs/class • Legacy network links … PNFD Service catalog VNF catalog O r c h e s t r a t o r NFV instances Service Instance • Services customized from templates by NFVO • Each service having component VNFDs, service graph definition, and real time status of service graph Link Instance • VNLs instantiated in NFVI by NFVO & VIM VNF Instance -‐ VNFs instantiated by NVFO, VNFM & VIM PNF Instance -‐ PNFs incorporated by NVFO Service Chain Record Virtual VNF Link Record Virtual Network Function Record Physical Network Function Record Element catalog VNFIDs VVLIDs NSIDs Service order with parameters Resource orders with parameters NSD VNFFGID Source: ETSI NFV MANO WI document (ongoing work)
- 9. Overview of MANO Descriptor Files (ongoing work) • Network Service descriptor: – E2E service description including supported SLA parameter, references to covered VNF-FG and VNFs, list of supported service monitoring parameters. • VNF Forwarding Graph descriptor: – VNFFG description, VNFs and VNFDs needed for orchestration, reference to link information, description of Physical/Logical interfaces • VNF Descriptor: – Links to scripts for initiation and termination, description of internal and external connectivity, dependencies between VNFCs. – VDU Description: • VM specification, required storage and computation resources, initiation and termination scripts, high avaliability redundancy model, scale_out/in limits. • PNF Descriptor: – reference to link information, exposed external interfaces, PNF addresses, PNF status, systems subscribed for notifications 8
- 10. Overview of MANO Descriptor Files (ongoing work) (ctd.) • Network Service Instance Descriptor: – Network service category , network attachment points, scaling methodology and policy, list of SLA descriptors, and monitoring parameter. • VNF Instance Descriptor: – VNF category, information on external connectivity, scaling methodology and policy, list of SLAs, and the list of monitoring parameter. 9
- 11. VNF DESCRIPTOR MODEL (ongoing work) 11 10
- 12. Current Development in NFV MANO WG • NFV MANO WG recently developed: – Network Service and VNF lifecyle management message flows: • including onboarding, instantiation, scaling and termination, • yet to do: VNF Forwarding Graph lifecyle management – Information elements for the entities VNF, VNFFG, NS and their instances, • Current focus is on NFV operational management: – Fault and event management – planned: capacity planning, migration, etc. • Provide gap analysis and recommendations to SDOs as well as open source organizations, – Collaboration for further development in selected organizations planned based on a cooperation on working group level. GS: Group Specifica.on
- 13. Timeline for ETSI NFV Work Programme Source: ETSI NFV White Paper 2 MANO WI Stable Draft MANO WI Early Draft 11
- 14. References • Published E2E Arch, REQ, Use Case, Terminology documents in ETSI NFV Open Area: – http://docbox.etsi.org/ISG/NFV/Open/Published/ • Published ETSI NFV white paper: – http://portal.etsi.org/NFV/NFV_White_Paper.pdf – http://portal.etsi.org/NFV/NFV_White_Paper2.pdf • ETSI member area: – Current NFV MANO WG WI document: DGS/NFV-MAN001 (ongoing work) • http://docbox.etsi.org/ISG/NFV/MAN/70-DRAFT/MAN1/NFV-MAN001v0011.zip – ETSI NFV ISG portal: • http://portal.etsi.org/portal/server.pt/community/NFV/367?tbId=789 – NFV MANO WG on ETSI portal: • http://portal.etsi.org/portal/server.pt/community/NFV/367?tbId=796 12