Moving along the NFV Way_

Transcription

1 Moving along the NFV Way_ Diego R. Lopez Telefónica I+D May 2014

2 The NFV Concept Network functions are fully defined by SW, minimising dependence on HW constraints DPI BRAS Firewall CG-NAT PE Router GGSN/ SGSN VIRTUAL NETWORK FUNCTIONS FUNCTION COMMON HW (Servers & Switches) CAPACITY

3 NFV-based Target Service Provider Network The target is a simplified, less expensive service provider network Service level functionality should be implemented largely in software The network infrastructure consists of low unit cost COTS network elements: servers, packet optical transport, data center switches and storage Leverage low cost per unit to provide bandwidth expansion and increasing range of services Use distributed storage instead of expensive routing and transport to deliver popular, high volume content Use software-based service delivery to be more responsive to new requirements from customers and market opportunities Automate management and provisioning to the greatest extent possible From hardware-based networks to software defined, virtualized ones Leverage SDN for application-aware routing, and separation of packet forwarding from control to rapidly introduce new services and adapt to changing traffic patterns Network functions, caching, applications, enablers all run in virtualized distributed data centers IP & transport infrastructure still used as necessary in optical backbone and Internet

4 Architectural Use Cases Network Functions Virtualisation Infrastructure as a Service Network functions go cloudlike Virtual Network Function as a Service Ubiquitous, delocalized network functions Virtual Network Platform as a Service Applying multi-tenancy at the level Forwarding Graphs Building E2E services by composition!

5 Service-Oriented Use Cases Mobile core network and IMS Elastic, scalable, more resilient EPC Specially suitable for a phased approach Mobile base stations Evolved Cloud-RAN Enabler for SON Home environment L2 visibility to the home network Smooth introduction of residential services CDNs Better adaptability to traffic surges New collaborative service models Fixed access network Offload computational intensive optimization Enable on-demand access services!!

6 The NFV Framework Logical Abstractions End Point E2E Network Service Network Service End Point Logical Links SW Instances : Virtualized Network Function Instances NFV Infrastructure Virtual Resources Virtual Compute Virtual Storage Virtual Network Virtualization SW Virtualization Layer HW Resources Compute Storage Network

7 XaaS for Network Services NSP User Forwarding Graph Admin User VNPaaS aas Admin User Hosting Service Provider Tenants NFVIaaS NFVI Provider IaaS NaaS NaaS PaaS PaaS SaaS

8 The NFV Reference Architecture OSS/BSS Service, and Infrastructure Description Os-Ma Se-Ma Orchestrator Or-Vnfm EMS 1 EMS 2 EMS 3 Ve-Vnfm Manager(s) NFVI 1 2 Vn-Nf 3 Vi-Vnfm Or-Vi Virtual Computing Computing Hardware Virtual Storage Virtualisation Layer Vl-Ha Storage Hardware Virtual Network Hardware resources Network Hardware Nf-Vi Virtualised Infrastructure Manager(s) Execution reference points Other reference points Main NFV reference points

9 Proofs of Concept Look for practical results Demonstrate and disseminate NFV capabilities Explore technology options Facilitate gap analysis Contribute to guide the future ISG activity Lightweight process Few (objective) requirements to file a PoC proposal Run PoC project Openly report results to the community The call is open along the ISG lifetime

10 It Ain t Cloud Applied to Carriers The network differs from the computing environment in 2 key factors 1 Data plane workloads (which are huge!) HIGH PRESSURE ON PERFORMANCE 2 Network requires shape (+ E2E interconnection) GLOBAL NETWORK VIEW IS REQUIRED FOR MANAGEMENT which are big challenges for vanilla cloud computing. AN ADAPTED VIRTUALISATION ENVIRONMENT IS NEEDED TO OBTAIN CARRIER-CLASS BEHAVIOUR

11 Cloud Computing vs NFV CLOUD COMPUTING NFV 1. PERFORMANCE BOUND TO CPU 2. AGGREGATED VIEW OF RESOURCES (CPU, memory, etc.) 3. ENDPOINTS Applications need the OS 4. NODE-CENTRIC Shapeless interconnection 1. PERFORMANCE BOUND TO I/O & MEMORY ACCESS 2. NUMA VIEW Internal architecture is relevant for guests 3. MIDDLEPOINTS Data-plane network functions bypass the OS 4. NETWORK-CENTRIC The network has a shape 5. MANY AND SMALL VMs 5. FEW AND LARGE VMs

12 Redesigning Network Segments Distributed Data Plane Centralized Control Plane Service Domain LOCAL PoPs CDN P-CSCF v Video Security REGIONAL DATA CENTRES SDP IMS v CSFB NGIN SRVCC M/SMSC EPC BRAS PE DHCP PCRF Network Domain DPI CG-NAT GGSN DNS UDB Infrastructure HW and SW decoupling OS + HyperVisor COTS HW HW and SW decoupling OS + HyperVisor COTS HW MPLS/SDN/Optical MPLS/SDN/Optical Networks PoPs and datacentres intra- and inter-communications will be critical to guarantee network service elasticity and network plasticity

13 With the Proper Balance between NFV & SDN BNG IPv4 / IPv6 CONTROL Session mgmt TR-069 UPnP DHCP CG-NAT NAT Pool admin NAT ctrl. POOL MGMT NFV SW-defined network functions Separation of HW and SW No vertical integration - HW vendor SW vendor Mgmt vendor Once network elements are SW-based, HW can be managed as a pool of resources SDN Interconnecting Virtual Network Functions (a.k.a. backplane) Separation of control and data plane Easy orchestration with SW domain

14 High and Predictable Performance is Achievable Acceptable performance 80 Gbps per COTS blade x10 GAP Bare Metal EXECUTION Bare Metal MANAGEMENT EXECUTION Bare Metal MANAGEMENT What defensive Industry says What can be achieved doing things well (*) (*) ETSI NFV Work Item NFV Performance & Portability Best Practises : DGS/NFV-PER001 Current version: v0.0.7 (stable draft 15/10/2013)

15 An Evolutionary Approach NFV implies a significant change for current network infrastructures No zero-day approach is feasible Avoiding disruptions Identify relevant use cases Emerging services Reuse of equipment still in amortization Leverage on new planned elements in architecture Plan for phased deployments Interworking with existing infrastructure Not breaking current operational practice Take advantage of NFV advantages Flexibility Extensibility Reusability Soft-Node DS vcpe

16 NFV Current Targets: Virtual Residential CPE Shifting network functions deployed in home environment to the network Telco Network environment Access Point Home environment Switch Módem Virtual CPE STB UPnP IPv4/IPv6 DHCP NAT FW TR-069 Simple, stable along the time and cheaper customer premises equipment Quick and transparent migration to IPv6 Service evolution and operation is supported inside telco network Monetize cloud and video services (virtual set top box) Monetize security and digital identity features Live trial today Commercial before end 2014 MATURITY LEVEL EXPLORE PoC TRIAL DEPLOY

17 NFV Current Targets: Elastic DPI Deeper RELEVANT INFO Copy RAW USER TRAFFIC RAW USER TRAFFIC MITIGATION OF Switch Metadata interface OpenFlow CENTRALISED INTELLIGENCE REAL-TIME ANALYSIS Security Alarms OF Controller Network Big Data xdrs POLICY DECISIONS Other data NFV domain SDN domain >80 Gbps line rate per server Stable signatures Flexible data analysis and signature upgrade Forensic analysis feasible. MATURITY LEVEL EXPLORE PoC TRIAL DEPLOY

18 NFV Current Targets: SW BNG BNG QinQ termination LPM Routing GRE tunnelling (reference for wholesale services) MPLS tunnelling 80 Gbps line rate switching per server MATURITY LEVEL EXPLORE PoC TRIAL DEPLOY

19 NFV Current Targets: Enhanced Virtual Router Leverage on open source routing project (Quagga) as rich and widely tested protocol suite while assuring data plane performance OPEN-SOURCE CONTROL PLANE (Quagga + Linux) Common routing protocols supported and extended by open source project. Well-known router command line. OPTIMIZED DATA PLANE (DPDK-based) High-performance line-rate data plane. Running as separate process, does not lead to licensing issues. MATURITY LEVEL EXPLORE PoC TRIAL DEPLOY

20 Accelerating Transformation ROADMAP ACCELLERATION Industry Exploration PoC Develop Trial & Industrialised product AVAILABLE Deployment SDOs & de facto technologies Open source & basic technologies Drive Standardise Time Months

21 Closing the Gaps ADD VALUE HERE: Industry should focus on providing differential s. Credible ROADMAP needed!! Legacy OSS/BSS Virtual Network Functions Orchestrator Manager ADD VALUE HERE: Industry should focus on providing differential s and Network Orchestration Current State of the Art is good enough (if properly arranged) OS + Hypervisor Commodity HW Commodity Switching infrastructure Virtualised Infrastructure Manager Work is needed in Open Source to AVOID proliferation of VERTICAL SOLUTIONS Network Virtualisation Infrastructure and its and Management its Management should become should completely homogenous become COMMODITY (commoditized if you like)

22 Taking a First Step: The NFV Reference Telefónica ECOSYSTEM ADD VALUE HERE: Simplest integration ECOSYSTEM s NFVO ADD VALUE HERE: Network Orchestration on top of Carrier-grade OpenStack NFVI VIM = OpenStack++ OFC++ Proper HW & Hypervisor config Carrier-grade OpenStack going to upstream development BASELINE TECHNOLOGIES 22

23

24