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NETWORK FUNCTIONSVIRTUALIZATION
Symposium on Computer Science and EngineeringUniversity of Massachusetts at Amherst
May 2, 2015
K. ARVINDhttps://www.linkedin.com/in/karvind
KRITHI60
Plan of the Presentation
• Problem• Solution – Network Functions Virtualization• Standards• Benefits • Enabling Technologies: Virtualization and Cloud• Orchestration• Conclusion
Carrier NetworksVariety of Network Functions
Message Router
Session Border Controller
WAN Accelerator
Deep Packet Inspection
Carrier Grade NATFirewall
Tester/QoE MonitorSGSN/GGSN
Provider Edge Router
BRAS MME
Problem•Variety of network appliances•Proprietary hardware•Expensive•Service deployment slowed down•Space•Power•Rapid obsolescence•Constrain innovation
Ref: ETSI NFV white paper
Solution: NFV•Network Functions Virtualization• Standard high volume hardware
•Servers•Storage•Switches
•Data centers or Customer Premises
Ref: ETSI NFV white paper
Network Functions Virtualization
• Initiated by an international consortium of Tier 1 service providers • European Telecommunications Standards Institute (ETSI)• ETSI NFV white paper - November 2012• Goal: Address the problem of expensive, proprietary, and short-lived
systems by:• Decoupling hardware and software• Leveraging standard IT virtualization technology• Using open APIs and an ecosystem of suppliers to build solutions
ETSI NFV ISG
>230 member companies Ref: NFV, An Insider’s Perspective, Marc Cohn, Sept 2013, www.sdxcentral.com
Ref: ETSI NFV ISG Publishes Second Release of Documents, Don Clarke, www.cablelabs.com
Phase 1 Organization Structure
ETSI NFV ISG Specifications
• GS NFV 001 – Use Cases• GS NFV 002 – Architectural Framework• GS NFV 003 – Terminology for Main Concepts• GS NFV 004 – Virtualization Requirements• GS NFV-MAN 001 – Management and Orchestration • GS-NFV-INF – NFV Infrastructure• GS NFV PER 002 – Proofs of Concept • and more: http://www.etsi.org/technologies-clusters/technologies/nfv
NFV Benefits•Cost Savings•Economies of Scale
•COTS hardware produced in high volume•Order of magnitude more servers shipped than routers
•Consolidation•Reduced equipment costs •Reduced power consumption
NFV Benefits
•Increased service velocity•Increased service agility•Increased pace of innovation
NFV Enabling Technologies
• Standard commodity hardware• Virtualization• Cloud Computing
Standard Commodity Hardware
•Industry standard servers (e.g., x86), switches and storage
•High volume – millions•Interchangeable subcomponent market
•Economies of scale
Virtualization
Ref: https://software.intel.com/en-us/articles/the-advantages-of-using-virtualization-technology-in-the-enterprise
Cloud Computing
• On-demand network access to computing capabilities
• Shared pool of computing resources
• Rapid elasticity• Metering capability
Ref: The NIST Definition of Cloud Computing, NIST SP 800-145
Ubiquitous, convenient, on-demand network access to computing capabilities
Shared Pool of Computing Resources
Rapid Elasticity
Metering
What do we have so far?
• Virtual Network Appliances => CapEx and OpEx savings• Open Standards => Ecosystem of virtual appliance suppliers• Cloud Infrastructure => On-demand creation of any
number of appliances• What is missing?
• Orchestration
Orchestration
ServiceOrchestrator
Orchestration
• Virtual Network Function Management:• Deploy, instantiate, monitor, scale, fault diagnosis, healing,
terminate
• Service Orchestration:• Create, activate, and manage whole network services that may
consist of an interconnection of VNFs and physical devices
• Resource Orchestration:• Coordinate with Virtual Infrastructure Manager to orchestrate
resource allocation
ETSI NFV Reference Architectural Framework
REF: ETSI GS NFV 002 v1.2.1 NFV Architectural Framework
Ensemble Open Service Architecture™Ensemble OSA™ is the industry’s first open architecture for
software-defined services
Optimizing the Service Delivery Lifecycle
The Ensemble Service Orchestrator is an open, extensible, carrier-class NFV service lifecycle management and orchestration system that coordinates virtual resources and physical network elements to create, activate, and assure services using one or more virtual network functions.
The award-winning ESO is designed to help communication service providers (CSPs) and mobile operators achieve the greatest cost savings and respond quickly and appropriately for optimized revenue generation. ESO helps providers and operators achieve greatest profitability.
http://www.overturenetworks.com/products/network-virtualization/ensemble-service-orchestrator-eso/
NFV Status
• Proof of Concept trials conducted by many service providers • British Telecommunications: vBRAS• Deutsche Telekom: vIMS• Orange Silicon Valley: vEPC• Telefonica: DPI, CGNAT
• Virtualization of Mobile Core Network and IMS seem to be the most popular applications.
• OPNFV – Open Platform for NFV
Carrier Networks are on the cusp of a paradigm shift
Proprietary hardware appliances are being replaced with virtual appliances.
Improved Service Velocity and Agility
Cost Savings
Reduced Environmental Impact
Innovation unshackled
ETSI is developing open specs for NFV
Orchestration is key to service provisioning