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NETWORK FUNCTION VIRTUALIZATION: FROM THE DATA CENTER TO THE WAN

Hayim Porat, CTO

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Use of standard IT virtualization technology to consolidate many types of network equipment onto industry standard servers, switches and storage

QUICK RECAP:WHAT IS NFV

Future Virtual Network

Physical Network

Orchestration

Internet

Standard high volume servers

F

A D

B C

G H I J

E

Internet

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Adaptation of OTT distributed cloud model to CSP networks to be more competitive Distributed flexible deployment Rapid service configuration

and delivery Automation Lower hardware costs

WHY IS NFV IMPORTANT

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As virtualized functionality can theoretically be run anywhere

But there are “considerations” Link issues

• Security• Tromboning • Latency

Performance for various functions

WHERE CAN VNFs RESIDE? Up to 100’s of km

apart

Service Provider Network

“The WAN”

10’s of km apart

Data Center Cloud

VNFs

Virtual network functions (VNFs) running on

commercial platformsVNFs

Edge Cloud

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CLOUD AND EDGE COMPUTING SERVICES

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Latency of Data TransactionsLow sensitivity High Sensitivity

Freq

uenc

y of

Dat

a Tr

ansa

ctio

ns

Low

High

Email

Video

Centralized Cloud Computing

Adapted from NTT January 2014

Storage Hosted Applications

Gaming

IoT

Smart City M2MAR

Health Care

Search

Enhanced Mobility

EnterpriseSecurity

Intelligent Transportation

Edge Cloud Computing

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EDGE COMPUTING SERVICES

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Driven by IoT, M2M

Focuses of NRENs everywhere

Opportunity for synergy with Network Function Virtualization (NFV)

Smart Cities

Intelligent Transportation

HealthAugmented

Reality

Delivery Production

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WHAT ARE UNIQUE PROPERTIES OF THE

EDGE CLOUD

Centralized Data Center Cloud

Edge Cloud

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DATA CENTER CLOUD

DATA CENTER VERSUS EDGE CLOUD

• Centralized

EDGE CLOUD

• Economies of scale

• Cheap space and energy

• A/C often not required

• Commoditized repeatable HW & SW

• Homogeneous management

• Not sensitive to latency

• Close to customers• Economies of application

• Premium for space and energy

• A/C required

• Tailored HW & SW

• Tailored management

• Low latency required

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ANOTHER EXAMPLE: CPE VIRTUALIZATION

Network functions for interworking enterprise LANs across the WANB Demarcation, routing, VPN, NAT,

WAN optimization, security, etc.

Implemented physically at customer premises using multiple dedicated appliances

PhysicalCPE

Service Provider Network

“The WAN”

Data Center Cloud

vCPE

vCPEVirtualization can be

distributed across multiple locations

Edge Cloud

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vCPE needs cleartext to process data

However the medium between the CP and cloud is unprotected

Hence both user encryption and tunnel encryption is required

Doubles processing and energy costs

LINK ISSUESSECURITY

1. Cleartext

2. Service provider IPSec Tunnel

4. User’s encrypted traffic

ServiceProvider or

Cloud Network

3. IPsec decryption, vCPE processing, User encryption

Service Provider Network

“The WAN”

Data Center Cloud

Edge Cloud

vCPE

vCPE

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Can occur frequentlyB DHCPB DNSB AAA

Creates link congestion

Can add many 10s of ms to transactions

LINK ISSUESTROMBONING AND LATENCY

Service Provider Network

“The WAN”

Data Center Cloud

Edge Cloud

vCPE

vCPE

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RECAP Edge cloud is preferred

choice for some applications However it has its unique

economics and scale Thus it needs tailored

solution Some things to consider:

B NFV at the network edgeB NFV accelerationB Hyper-converged cloud

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NFV TO THE NETWORK EDGE Reduces latency

Limits tromboning

Also a platform for edge computing services (e.g. IoT, M2M, AR)

Up to 100’s of km apart

Service Provider Network

“The WAN”

10’s of km apart

Data Center Cloud

VNFs

VNFs

Edge Cloud

Move VNFs from anywhere in the network or cloud, to as close

as possible to the WAN edge

Plus opportunity to combine with the

Edge Cloud

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NFV ACCELERATION Supplement NFV for intensive

input/output or other processing tasks not best suited to general purpose computing

Create a hybrid device with best of both worlds

Optimize for first cost and energy costs

Optional add-on only when needed

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THE CASE FOR A HW ACCELERATED NFV

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Processor Number (sorted by efficiency)

Ene

rgy

effic

ienc

y (M

OP

S/m

W)

Microprocessors

DSPs

10x

100x

Dedicated HW

More efficient…

More flexible…

FPGAs ASICs

Source: Bob Broderson, Berkeley Wireless group

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APPLYING ACCELERATION TO VNFs

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High speed switching

Deep packet inspection

Security

Digital signal processing

INTERESTING TOPIC FOR NREN

RESEARCH

Mobility

VNFs

Switching

VPN Gateways Control & Access

Traffic analysis

Service assurance

Signaling

Security

Optimization

P-CPE

Service Provider or Cloud Network

VNFs

VNFs

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HYPER CONVERGED CLOUD Strong fit with distributed

network edge computing

Eases complexity through local plus hierarchical management Unified meta-data management,

customized edge management

Complimentary with NREN research!!

Servers Storage Network Management Security Facilities Services

Converged Infrastructure

ComputeStorage

Networking

Intelligence

Virtual Machine

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Multiple platforms for best application fit

B Neptune packet transport bladeB Stand-alone moduleB I/O acceleration

Best of breed VNFsAccelerated NFV-IHyper converged cloud

platform based on OpenStack

ECI ELASTIC VIRTUALIZATION Mercury NFV platforms

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“Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better.” ― Edsger W. Dijkstra

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THANK YOU!

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