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The NFV Way: It Ain’t Carrier-Grade Cloud_ Diego R. Lopez Telefónica I+D March 2014.

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Presentation on theme: "The NFV Way: It Ain’t Carrier-Grade Cloud_ Diego R. Lopez Telefónica I+D March 2014."— Presentation transcript:

1 The NFV Way: It Ain’t Carrier-Grade Cloud_ Diego R. Lopez Telefónica I+D March 2014

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

3 DISCOVER, DISRUPT, DELIVER 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 DISCOVER, DISRUPT, DELIVER The NFV Framework NFV Infrastructure End Point E2E Network Service ComputeStorageNetwork HW Resources Virtualization Layer Virtualization SW Virtual Compute Virtual Storage Virtual Network Virtual Resources Logical Abstractions Network Service VNF Logical Links VNF Instances VNF SW Instances VNF : Virtualized Network Function VNF

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

6 DISCOVER, DISRUPT, DELIVER It Ain’t Cloud Applied to Carriers The network differs from the computing environment in 2 key factors… Data plane workloads (which are huge!) Network requires shape (+ E2E interconnection) HIGH PRESSURE ON PERFORMANCE GLOBAL NETWORK VIEW IS REQUIRED FOR MANAGEMENT 1 2 …which are big challenges for vanilla cloud computing. AN ADAPTED VIRTUALISATION ENVIRONMENT IS NEEDED TO OBTAIN CARRIER-CLASS BEHAVIOUR

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

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

9 DISCOVER, DISRUPT, DELIVER With the Proper Balance between NFV & SDN BNG CONTROL CG-NAT 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 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 NFV Interconnecting Virtual Network Functions (a.k.a. backplane)  Separation of control and data plane  Easy orchestration with SW domain Interconnecting Virtual Network Functions (a.k.a. backplane)  Separation of control and data plane  Easy orchestration with SW domain SDN DHCP UPnP TR-069 IPv4 / IPv6 Session mgmt NAT NAT ctrl. Pool admin POOL MGMT

10 DISCOVER, DISRUPT, VM Bare Metal Acceptable performance Bare Metal GAP x10 Bare Metal EXECUTION MANAGEMENT EXECUTION MANAGEMENT What defensive Industry says What can be achieved doing things well (*) 80 Gbps per COTS blade (*) ETSI NFV Work Item “NFV Performance & Portability Best Practises”: DGS/NFV-PER001DGS/NFV-PER001 Current version: v0.0.7 (stable draft – 15/10/2013) High and Predictable Performance is Achievable

11 DISCOVER, DISRUPT, DELIVER 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 EXPLOREPoCTRIALDEPLOY MATURITY LEVEL Switch Access Point Módem Virtual CPE FW TR-069 NAT UPnP DHCP IPv4/IPv6 STB Home environment Telco Network environment Shifting network functions deployed in home environment to the network… Live trial today Commercial before end 2014 NFV Current Targets: Virtual Residential CPE

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

13 DISCOVER, DISRUPT, DELIVER QinQ termination LPM Routing GRE tunnelling (reference for wholesale services) MPLS tunnelling 80 Gbps line rate switching per server BNG EXPLOREPoCTRIALDEPLOY MATURITY LEVEL NFV Current Targets: SW BNG

14 DISCOVER, DISRUPT, DELIVER Common routing protocols supported and extended by open source project. Well-known router command line. EXPLOREPoCTRIALDEPLOY MATURITY LEVEL 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) OPTIMIZED DATA PLANE (DPDK-based) High-performance line-rate data plane. Running as separate process, does not lead to licensing issues. NFV Current Targets: Enhanced Virtual Router

15 DISCOVER, DISRUPT, DELIVER 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

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