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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.
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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
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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
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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
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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
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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)
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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
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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.
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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
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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
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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
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“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
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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
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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
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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
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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
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Broadband Network Gateway
Broadband Service Gateway
BBF WT-178: HIERARCHICAL BNG (REVERSE ANGLE)
Residential Gateway
MPLS Backbone
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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
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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
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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
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NFV REFERENCE ARCHITECTURE (ETSI GS NFV 002 V1.1.1 2013-10)
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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
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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
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EXTRACTING SERVICES FROM THE NETWORK
On Box x86 Service Complex On Cloud
Where Is The Best Location To Scale Service Deployment?
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WHERE TO START?
New Risks and Complexity Still Baking
vCPE
Service Chaining
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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
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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.
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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
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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
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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)