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It Ain’t Carrier-Grade Cloud_

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Presentation on theme: "It Ain’t Carrier-Grade Cloud_"— Presentation transcript:

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

The NFV Concept Network functions are fully defined by SW, minimising dependence on HW constraints VIRTUAL NETWORK FUNCTIONS DPI CG-NAT GGSN/ SGSN FUNCTION BRAS Firewall PE Router 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 The NFV Framework NFV Infrastructure E2E Network Service Compute
End Point E2E Network Service Compute Storage Network HW Resources Virtualization Layer Virtualization SW Virtual Virtual Resources Logical Abstractions Network Service VNF Logical Links VNF Instances SW Instances VNF : Virtualized Network Function

5 The NFV Reference Architecture
Computing Hardware Storage Network Hardware resources Virtualisation Layer Virtualised Infrastructure Manager(s) VNF 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 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 GLOBAL NETWORK VIEW IS REQUIRED FOR MANAGEMENT Network requires shape (+ E2E interconnection) …which are big challenges for vanilla cloud computing. AN ADAPTED VIRTUALISATION ENVIRONMENT IS NEEDED TO OBTAIN CARRIER-CLASS BEHAVIOUR

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

8 Redesigning Network Segments
Distributed Data Plane Centralized Control Plane LOCAL PoPs v v REGIONAL DATA CENTRES Service Domain CDN Video SDP CSFB NGIN P-CSCF Security IMS SRVCC M/SMSC Network Domain EPC BRAS PE DHCP PCRF DPI CG-NAT GGSN DNS UDB HW and SW decoupling HW and SW decoupling Infrastructure OS + HyperVisor OS + HyperVisor COTS HW 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

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

10 High and Predictable Performance is Achievable
80 Gbps per COTS blade @Cloud VM Bare Metal Acceptable performance GAP x10 @vPoP EXECUTION 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)

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

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

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

14 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. EXPLORE PoC TRIAL DEPLOY MATURITY LEVEL

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 Thank you.

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