evolving the provider edge towards sdn and...

EVOLVING THE PROVIDER EDGE TOWARDS SDN AND NFV Rich Bayliss Chief Architect, Service Provider Edge Solutions November 2013

2 Copyright © 2013 - INTERNAL ONLY – Confidential and Proprietary. Juniper Networks, Inc. www.juniper.net

ABSTRACT

  The increased reach of MPLS enables new methods to converge and consolidate the traditional network silos.

  Software Defined Networking (SDN) and Network Functions Virtualisation (NFV) raise fresh questions over where subscriber attachment, service delivery and service intelligence should reside.

  In this presentation various real-world service provider architectures will be discussed highlighting the increasing diversity and opportunity of each solution.


New Service Infrastructure Solutions

AGENDA

Simplified Modern Network Architectures

Software Defined Intelligent Networking

x86

Simplify Infrastructure

Decouple Services

Converge networks

What is Edge?

Architecture Trends

My Focus At Juniper

Network Optimsation

Network Virtualisation

Dynamic Services


Metro PoP DC Core

EDGE IS A MEETING PLACE FOR INFRASTRUCTURE AND SERVICES

APP

DWDM

IP CORE

Aggregation CO

AP WiFi

WIFI

Cust X

CPE L2/Eth

CSG

eNB 4G Device

L2/Eth

IWF NTU

Cust Y

LL

OLT

VoIP

RG

STB

PON

ONT

AGG

BNG

PE

Subscriber Attachment

Service Delivery


ACCESS IS APPROACHING GIGABIT SPEEDS

CURRENT EMERGING

CELLULAR 3G HSPA+ 21-84Mbps/5.8Mbps+ LTE 100-300Mbps/50-75Mbps

LTE-Advanced (fixed) 1Gbps LTE-Advanced (mobile) 100Mbps

WIFI WiFi (802.11n) 288-600Mbps (2.4/5GHz) WiFi (802.11ac) 1.3Gbps (5GHz) WiGig (802.11ad) 7Gbps (60GHz)

FIBER GPON (G.984) – 2.488Gbps/1.244Gbps DOCSIS 3.0 (J.222) 160Mbps+/120Mbps+

10GPON (G.987) 10Gbps/2.5Gbps DOCSIS 3.1 1-10Gbps/1Gbps+

COPPER ADSL2+ (G.992.5) 24Mbps/1Mbps VDSL (G.993.1) 55Mbps/15Mbps

VDSL2 (G.993.2) 100Mbps/100Mbps

VDSL2-Vectoring 200-300Mbps G.Fast (FTTdp) 500Mbps-1Gbps


Relentless Pressure To Optimize Costs

Develop and Monetize Wireless, Cloud &

Video Content

Increase Service Innovation with Awareness, Velocity

and Agility

Reuse Elastic, Dynamic & Programmable Resources

Network Consolidation & Convergence

Complex Service Value Chains

BUSINESS AND TECHNOLOGY REQUIREMENTS


MY FOCUS AT JUNIPER

  1. Access, Aggregation and Service Edge Architecture

Leverage NGCO concepts.

Converge and Consolidate Access + Edge

Streamline NG-Edge Architecture Introduction

  2. Decouple and Distributed Services MPLS (Seamless MPLS, Segment Routing and MPLS-TP)

Network Functions Virtualisation

  3. Enhance and Evolve Services Enhanced business, residential and cloud services

Evolved network/transport services (SDN + NFV)


ATIS CCTF - CONSOLIDATION AND CONVERGENCE (BBF2013.293)

BIG BANG

PHASED

INCREMENTAL

CONCURRENTLY: Eliminate Copper Larger Access Areas Larger Regulatory Definitions

GOAL: Move To Converged Delivery of IP-Based Enhanced Services

SEQUENTIALLY: 1. Eliminate Copper 2. Larger Access Areas 3. Larger Regulatory Definitions

SEQUENTIALLY: 1. Reduce Copper 2. Larger Regulatory Definitions 3. Consolidate Facilities. 4. Eliminate Copper


INFRASTRUCTURE REQUIREMENTS OTHER THAN ACCESS TYPE AND SCALE

  Multiple Services §  MBH, Business, Residential, Wholesale §  Convergence on High-Speed Aggregation/Metro

  Any Topology §  Ring, Hub and Spoke, Partial Mesh, Subtending Nodes

  Assurance §  High Availability, QoS, Service Differentiation, SLA and OAM.

  Flexible §  Service Deployment - automated with network management §  Service Modification (Dynamic, L2-L3, VLAN allocation, BW, …)

  Manageable §  Centralized if possible, on-device if needed (ie. troubleshooting) §  Capacity control - Analytics increasingly important

  Security §  Physical security, network control plane, network dataplane, APIs.


Metro PoP DC Core

WHERE SHOULD TRADITIONAL SERVICE EDGE FUNCTIONS OCCUR?

APP

DWDM

IP CORE

Aggregation CO

AP WiFi

WIFI

Cust X

CPE L2/Eth

CSG

eNB 4G Device

L2/Eth

IWF NTU

Cust Y

LL

OLT

VoIP

RG

STB

PON

ONT

AGG

BNG

PE

Traditional

Service Edge

Distributed

Intelligent Access

Hybrid/Hierarchical

NFV

Cloud

Centralized


Service Edge Core

DWDM

IP CORE

BNG

PE

Aggregation

EXAMPLE 1: UNIVERSAL ACCESS + EDGE

Ethernet

AP WiFi

WIFI

Cust X

CPE L2/Eth

CSG

eNB 4G Device

L2/Eth

IWF NTU

Cust Y

LL

OLT

VoIP

RG

STB

PON

ONT

ROLE LOCATION ROLE/SERVICE

CPE/CSG Remote/Collector Cabinets, Cell Sites, MTU Mobile Backhaul (2G/3G, LTE).

AGG Collector Cabinets, COs Carrier Ethernet Routers – L2/L3 VPNs & MPLS services, Business Ethernet PE (L2/L3 VPNs), Residential Access

BNG/PE POPs Full service BNG & PE Service Node w/ Integrated L4-L7 services

AGG

DC

APP

Tier 1 APAC


TODAY: SERVICES ARE TIGHTLY COUPLED WITH NETWORK TRANSPORT CONFIGURATION

Aggregation Ring

Access Ring

Access Ring

Access Chain Aggregation

Ring

Access Ring

Access Chain

Core Mesh Access Chain

L3VPN + DPI

L3VPN + DPI

L3VPN + DPI L3VPN + DPI

L3VPN + DPI

L3VPN + DPI

E-Line

E-Line

Complex, Constrained, Fragile Configuration


“SEAMLESS" MPLS: END-TO-END SINGLE MPLS DOMAIN (ID: DRAFT-IETF-MPLS-SEAMLESS-MPLS)

L2 P-t-P Services: Inter-area LSP signaling, Inter-area independence through LSP hierarchy, End-to-end service continuity

Edge

BN

Access Core

IP CORE CPE

Edge

BN

Access

CPE

Agg Agg

L3 Services: Inter-area LSP signaling, Pseudowire access to L2/L3 network services, Flexible topological service placement

Edge

BN

Access Core

IP CORE CPE

Edge

BN

Access

CPE

Agg

SN

Agg

SN

LSP LSP PW PW

LSP SN SN

MPLS REMOVES LIMITATIONS ON MAC/VLAN SCALE AND TOPOLOGY

LSP LSP LSP PW PW

AN AN

AN AN


Service Edge

Aggregation Service Edge Access

RG

EXAMPLE 2: NG-BROADBAND FIXED NETWORK EVOLUTION

Core

BRAS

IPTV-RTR

AGG 2 AN IP CORE

PON INTERNET

PRESENT MODE OF OPERATION: Two layers of Aggregation and Dual Service Edge. High complexity and cost.

FUTURE MODE OF OPERATION: Distributed BNG as Service Edge. Simplified NGN with reduced costs.

Access

RG

Core

AN BNG

PON

AGG 1

TV/VOD

IP CORE

INTERNET

TV/VOD

RADIUS Provisioning for Business Services, L2 Wholesale Capable.

Tier 1 Global


Service Edge

EXAMPLE 3: CONVERGED NG-POP SERVICE EDGE

Ethernet

AP WiFi

WIFI

Cust X

CPE L2/Eth

CSG

eNB 4G Device

L2/Eth

IWF NTU

Cust Y

LL

OLT

VoIP

RG

STB

PON

ONT

BNG

Core

DWDM

IP CORE

DC

APP

Tier 1 Global


NGPOP

EXAMPLE 3: CONVERGED NG-POP SERVICE EDGE

AP WiFi

Cust X

CPE L2/Eth

eNB 4G Device

L2/Eth

VoIP

RG

STB

PON

ONT

FUNCTION ROLE FUNCTION ROLE

NG-OLT NG OLT with range up to 100km CDN Content Distribution and CDN services.

WIFI WiFi Controller COORD Network Coordination, particularly GSM/WIFI

BBU Mobile Baseband Processing EPC Mobile (and Fixed) Network Core Elements

CDN

NG-OLT

BNG WIFI

EPC BBU

COORD

Core

DWDM

IP CORE

DC

APP

Tier 1 Global


METRO ARCHITECTURES SUMMARY

Aggregation

TRADITIONAL: Multiple Layers of Aggregation, Service Edge separate to IP Core edge (LER functionality)

Metro PoP

SERVICE EDGE

CO Core

IP CORE CPE AN PRE AGG IP CORE AGG

Aggregation

OPTIMIZED: Single Layer Aggregation, Optimized centralized edge combines Service Edge and LER functionality Reduced number of device layers, traditional service edge placement.

Metro PoP

SERVICE EDGE

CO Core

IP CORE CPE AN AGG

Aggregation

DISTRIBUTED: Distributed Service Edge, Centralized IP Core edge providing LER and/or LSR functionality Reduced number of device layers, ‘optimised’ service edge placement.

Metro PoP CO Core

IP CORE CPE AN IP CORE SERVICE EDGE


Broadband Network Gateway

Broadband Service Gateway

BBF WT-178: HIERARCHICAL BNG (REVERSE ANGLE)

Residential Gateway

MPLS Backbone


HIERARCHICAL METRO ARCHITECTURES

Aggregation

HIERARCHICAL EDGE: Multiple Layers of Service edge, EG. BBF H-BNG/BSR, 3GPP TDF/SDG.

Metro PoP

SERVICE EDGE

CO Core

IP CORE CPE AN PRE AGG SERVICE EDGE AGG

Aggregation

DISTRIBUTED HEIRARCHICAL: Distributed subscriber attachment, centralized Service Edge (eg CGNAT).

Metro PoP

SERVICE EDGE

CO Core

IP CORE CPE AN SERVICE EDGE


Agg Metro PoP CO

METRO METRO

TRANSPORT METRO: Transport optimized metro (eg PTX3000) with optional distributed Service Edge

Core

IP CORE

SERVICE EDGE

CPE AN TPT RTR SERVICE EDGE IP CORE

EXAMPLE 4 & 5: TRANSPORT OPTIMIZED METRO ARCHITECTURES

CO Metro PoP

METRO

INTELLIGENT AN: Fully distributed Service Edge with optional centralized services.

Core

IP CORE CPE AN SERVICE EDGE

SERVICE EDGE

TPT RTR

Tier 1 Global


SDN AND NFV – A QUICK PRIMER

SDN – An evolution in network architecture

NFV – An evolution in equipment architecture

Equipment Architecture

Network Architecture

Standards Problem Space: 1.  What functions of the existing

network equipment should be virtualized ?

2.  What impact does SDN have on existing network architectures ?

3.  What impact do NFV and SDN have on each other ?

Network Function Virtualization • Network functions in VMs on x86 • Chain physical network to VNFs • Elastic scaling • More choice, faster innovation

Software Defined Networking • Centralized control logic • Network abstraction,

programmability & automation • Global optimization


NFV REFERENCE ARCHITECTURE (ETSI GS NFV 002 V1.1.1 2013-10)


Metro PoP Core CO

METRO AN

SERVICE EDGE

TPT RTR

DC Metro PoP CO

METRO

CLOUD SERVICE MODEL: Transport optimized metro with DC hosted cloud services.

Core

IP CORE CPE AN

EXAMPLE 6 & 7: CLOUD OPTIMIZED METRO ARCHITECTURES

DISTRIBUTED CLOUD : Transport optimized metro with Edge hosted cloud services (Service Card or Appliance).

CPE

SERVICE EDGE

TPT RTR SERVICE EDGE

IP CORE

APP

APP

Tier 1 Global

Tier 1 EMEA


Core Svc Complex

SERVICE NODE

SERVICE CHAINING AND PROACTIVE OVERLAYS

Metro PoP

UNDERLAY

SERVICE EDGE

UNDERLAY UNDERLAY

Cust X

CPE L2/Eth

Cust Y

CPE L2/Eth

Cust Z

CPE L2/Eth

Orchestrator + SDN Controller

CUST X

CUST Y

CUST Z

METRO

VNO

VNO

VNO

APP VNF

APP VNF

APP VNF

Tier 1 Global


EXTRACTING SERVICES FROM THE NETWORK

On Box x86 Service Complex On Cloud

Where Is The Best Location To Scale Service Deployment?


WHERE TO START?

New Risks and Complexity Still Baking

vCPE

Service Chaining


PROBLEM SPACE (BUSINESS EXAMPLE)

Cust X

L3 CPE PE

Core PNF/VNF

SERVICE CHAINING PROBLEM SPACE BBF: SD-326: “Service Chain” ETSI NFV ISG: “Network Forwarding Graph” IETF SFC: “Service Function Chaining” ITU-T SG11 (Test & Protocol) ITU-T SG13 (Future Networks) ONF

VIRTUAL CPE/BNG PROBLEM SPACE BBF WT-317 (Res): NERG BBF WT-328 (Biz): VBG ETSI NFV ISG: vE-CPE ITU-T SG11 (Test & Protocol)

Subscriber Attachment

Service Delivery


VCPE AND VIRTUAL SERVICE DELIVERY COVERAGE OVER TIME

Real Time Service Delivery AKA Service Chains

Virtual CPE

COVERAGE

TIME

Both Approaches Provide Benefits, Both Approaches Converge Over Time.


LONG-TERM ARCHITECTURE KEY ELEMENTS

Service Complex/DC

EDGE POP CORE L2 AGG ACCESS RETAIL ISP INTERNET

AP WiFi

WLC

OLT

VoIP

RG

STB

ONT

MS-BNG L2 SW

Cust X

CPE L2/Eth

MPLS CORE MS-BNG

IPv6

IPv4

CLOUD SERVICES

Hybrid/Hierarchical

Cloud

Tier 1 Global


Reuse Elastic, Dynamic & Programmable Resources

Network Consolidation & Convergence

Complex Service Value Chains

LEVERAGE EMERGING ARCHITECTURAL TRENDS

Simplified Modern Architecture

Universal Application Platform

Software Defined Intelligent Networking

x86


SUMMARY

  Why Does All Of This Matter?

Future architectures require fresh thinking in every corner of the network.

Service Providers are investigating a range of alternative architectures.

Standards are increasingly important but fragmented

  Common Aspects Of Each Alternative

Simplified Edge Architecture

Decouple transport from services (MPLS, Service Chaining)

Evolve network services with x86 (SDN and NFV)

evolving the provider edge towards sdn and...

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