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31 Pages·2016·1.58 MB·English

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INTRODUCTION
 TO
 SOFTWARE
 DEFINED
 WIDE
 AREA
 NETWORKS
 (SD-­‐WAN)

APRICOT
 2016

ALASTAIR
 JOHNSON

FEBRUARY
 2016

2

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
AGENDA

1.  What
 is
 SD-­‐WAN?

2.  Why
 is
 SD-­‐WAN
 happening?

3.  How
 does
 it
 work?

4.  Why
 do
 service
 providers
 care?

5.  Summary

3

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
WHAT
 IS
 SD-­‐WAN?

SD-­‐WAN
 (SoXware
 Defined
 Wide
 Area
 Network)
 is
 a
 new
 model
 for
 evolving
 the
 delivery
 of
 WAN
 services
 using

SDN
 principals

--

Overlay(offers( Self%governance-
IT-­‐approach
 to

transport( of-service- network
 service

delivery

choices( func1ons-

SD-­‐WAN
 changes
 the
 model
 of
 tradi\onal
 WAN
 networking
 with
 an
 IT-­‐approach
 to
 network
 services,
 with

centralized
 control
 and
 a
 decoupled
 service/transport
 architecture

4

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
WHAT
 IS
 SD-­‐WAN?

•  Open
 Network
 Users
 Group
 (ONUG)
 Working
 Group

-  Defini\on
 of
 use
 cases,
 test
 plans,
 and
 interop

-  Whitepaper
 with
 core
 business
 requirements
 for
 SD-­‐WAN
  1.  Ac\ve-­‐ac\ve
 WAN
 transports
 (public/private)

-  Biannual
 showcases
 of
 products
 aligned
 with
 use
 cases

2.  Virtual
 or
 physical
 CPE
 on
 commodity
 hardware

-  Primarily
 enterprise
 focused,
 with
 vendor
 par\cipa\on
 and
 contribu\on

3.  Secure
 hybrid
 WAN
 architecture
 with
 dynamic
 traffic

•  Heavy
 focus
 on
 virtualiza5on

engineering

-  Network
 Virtualiza\on
  4.  Visibility,
 priori\za\on
 and
 steering
 of
 traffic

-  Abstrac\on
 of
 service
 from
 transport
 –
 like
 MPLS
 did
 in
 the
 IP
 world
 (and
 IP
 did
 to
  5.  Highly
 available
 and
 resilient
 WAN

Op\cal)

-  Virtual
 Machines/Network
 Func\on
 Virtualiza\on
  6.  L2
 and
 L3
 interoperability

-  Abstrac\on
 of
 service
 func\on
 from
 hardware
  7.  Dashboard
 repor\ng

-  Virtualized
 router,
 firewall,
 …
  8.  Open
 north-­‐bound
 APIs

•  Driven
 by
 enterprises
 looking
 for
 new
 technology
 advantages

9.  Zero
 touch
 deployment
 of
 branch
 site

-  Opera\onal

10.  FIPS
 140-­‐2
 cer\fica\on

-  Financial

-  Efficiency

-  New
 capabili\es

5

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
SD-­‐WAN
 –
 BIGGER
 PICTURE

Centralized

Policy
 and
 Control

Policy
 based
 Network

management

Automated
 branch

and
 Services
  Intelligent
 Traffic
 control

orchestra\on

Wellington
  MPLS
 WAN

SD-­‐WAN
 enabled
 VPN
 Network

Any-­‐to-­‐any
 network

connec\on

HQ/DC

Auckland

Christchurch
  Internet
  Transport
 Independent

6

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
NETWORK
 VIRTUALIZATION
 IS
 NOT
 NEW

Service
 layers
 con\nue
 to
 be

abstracted!

P2P

Op\cal
 Transport
 and
 Service

IP
 service
 layer
 overlaid
 on

op\cal
 transport

VRF
VRF
VRF
VRF VRF
VRF
MPLS
 service
 on
 IP
 transport

VRF VRF
on
 op\cal
 transport

7

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
CPE
 CHANGES

HOW
 IS
 THIS
 DIFFERENT
 FROM
 VCPE?

• Virtualized
 CPE
 (VCPE)
 is
 looking
 at
 evolu\on
 of
 CPE,
 not
 at
 evolu\on
 of
 network
 or
 service

• CPE
 as
 a
 virtual
 machine
 on
 X86

-  Virtualized
 Network
 Func\on
 (VNF)
 running
 in
 the
 datacenter
 or
 on
 other
 commodity
 hardware

• X86
 CPE
 plamorm
 at
 the
 customer
 premises
 that
 can
 host
 VNFs

• ”Same
 same
 but
 different”

-  Changing
 the
 hardware
 plamorm
 to
 reduce
 cost
 or
 consolidate
 physical
 components

-  Does
 not
 take
 advantage
 of
 the
 management
 or
 network
 abstrac\on
 benefits

L2

PE

VCPE
 in
 DC
  X86
 VCPE
 at
 customer
 site

8

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
AGENDA

1.  What
 is
 SD-­‐WAN?

2.  Why
 is
 SD-­‐WAN
 happening?

3.  How
 does
 it
 work?

4.  Why
 do
 service
 providers
 care?

5.  Summary

9

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.
EVOLUTION

•  Management scale •  Hybrid transports
•  Centralization Control
  Cost
  •  Mix and match MPLS,
Wireless, Internet, …
•  IT-centric approach with
APIs/programmability •  Internet “good enough”
•  Automation of management •  Sharp cost savings make it so
•  Upgrades •  Primary transport for cloud/
Flexibility

web applications
•  Events
•  X86 platforms with high
•  Visibility and reporting
performance and modest cost
•  Span/scope delegation
•  Mix and match site capabilities
•  Service chaining for new
and network requirements
functionality
•  Hybrid transports
•  Hybrid cloud environments
•  Improve site turn-up times
10

COPYRIGHT
 ©
 2016
 NOKIA.
 ALL
 RIGHTS
 RESERVED.