Broadband Middle Mile

Broadband – Middle Mile 2010 ACE/RUS School and Symposium May 2-5, 2010 St. Louis, MO Brian LeCuyer, PE RVW, Inc. (402)564-2876 [email protected] ...
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Broadband – Middle Mile 2010 ACE/RUS School and Symposium May 2-5, 2010 St. Louis, MO Brian LeCuyer, PE RVW, Inc. (402)564-2876 [email protected]

Agenda • Pressures on Existing Transport • Technology Options • Key Considerations

©2006 RVW, Inc.

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Pressures on Existing Transport • Practically All Services Moving to IP/Ethernet – – – – –

Internet Access IPTV (Multicast / VOD) Voice (Traditional and VoIP) Business Services Distance Learning / Telemedicine

• Telco Operations Moving to IP/Ethernet – Network Management / Alarm Monitoring – Plant Records / Maps – Communication / Resource Management / Etc. ©2006 RVW, Inc.

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Pressures on Existing Transport • Bandwidth Demands Increasing – Internet Access – Entertainment Video • Expanding Channel Lineup • High-Definition Content • VOD

– Gigabit Ethernet Networks Quickly Exhausted – Push to 10-Gig and Beyond

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Pressures on Existing Transport • IP/Ethernet Network Performance Requirements Increasing – Voice and Video Services (Latency/Jitter) – Business Service Level Agreements

• IP/Ethernet Network Reliability Requirements Increasing – More Eggs in the Basket – Customer Expectations – Competition ©2006 RVW, Inc.

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Pressures on Existing Transport • Legacy TDM/SONET Challenges – IP/Ethernet Service Transition • Service Interface • Network Topology • Ethernet OA&M

– Bandwidth Efficiency/Growth

• Legacy IP/Ethernet Challenges – Performance and Reliability – Ethernet and Service Layer OA&M – Bandwidth Growth / Network Scalability ©2006 RVW, Inc.

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Technology Options • • • •

Ethernet over SONET Legacy Ethernet over Fiber CWDM / DWDM Systems Modern Carrier Ethernet

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Technology Options • Ethernet over SONET – First Generation of “Carrier Class” Ethernet – Leverages SONET Protection Scheme – Unified TDM and Packet Transport – Can be Bandwidth Inefficient • STS-level concatenation wastes bandwidth • Virtual concatenation (VCAT) more efficient

– Bandwidth Limited Beyond 1-Gig – 10-Gig (OC-192) Relatively Expensive ©2006 RVW, Inc.

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Technology Options • Ethernet over SONET – Early Systems Only Provide P2P Circuits – Modern Systems Provide MP2MP – GFP Encapsulation for Interop – Some Systems Integrate Switching/Routing Intelligence – Some Systems Adding MEF Compliance – At Least One Vendor Integrates DWDM Overlay Capability into SONET System ©2006 RVW, Inc.

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Technology Options • Legacy Ethernet over Fiber – Deploy Ethernet Switches/Routers with Direct Optical Interconnection – Traditionally Considered Less Reliable than SONET, but Closing Gap Rapidly – Very Wide Range of Cost and Capabilities – Low-End Using Non-Redundant, FixedConfiguration L2/L3 Switches – High-End Using Fully Redundant, ChassisBased Switches Using MPLS or PBB ©2006 RVW, Inc.

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Technology Options • Legacy Ethernet over Fiber – Low-End System Protection • Ring/Mesh protection via spanning-tree protocols • Hardware redundancy via dual switches • Uplink protection via STP

– High-End System Protection • Ring/Mesh protection via MPLS or PBB • Hardware redundancy via dual cards/blades • Uplink protection via STP or LAG

– Steady Movement Towards “Carrier Class” ©2006 RVW, Inc.

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Technology Options • CWDM / DWDM Systems – Technology Carries Multiple Systems “Stacked” on Same Fiber Using Different Wavelengths – Option for Growth of Legacy Ethernet Systems – Integration of Modern Carrier Ethernet Capabilities • “Best of Both Worlds” Systems • Modern Service and OAM Capabilities • Simple and Cost-Effective Growth ©2006 RVW, Inc.

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Technology Options

• Modern Carrier Ethernet

– Implement Standards that Improve System Performance, Reliability and OA&M • • • •

Consistent Service and Interface Definitions Enhanced Optical Transport Capabilities Carrier Class Protection System and Service Performance Monitoring

– Carrier Ethernet Standards Bodies • • • •

MEF - Metro Ethernet Forum IEEE - Institute of Electrical/Electronics Engineers ITU - International Telecommunication Union IETF - Internet Engineering Task Force 15 ©2006 RVW, Inc.

Technology Options • Modern Carrier Ethernet – MEF • Service Definitions – E-LINE, E-LAN, E-TREE – Port-Based / VLAN-Based

• Network Interface Definitions – UNI, NNI, E-NNI

• Test Profiles • OA&M Requirements

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www.MetroEthernetForum.org/presentations.htm

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Each Standards Body Has Their Approach Working outward from the core

Working inward from the edge

Making it work together

The MEF’s role is largely additive to these organizations, developing necessary additional specifications that are required to enable Carrier Ethernet. The MEF also provides inputs in support of Carrier Ethernet to these bodies via its participating members and liaisons. It is not within the scope of the MEF to endorse or otherwise the work of other standards bodies and associations ©2006 RVW, Inc.

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Carrier Ethernet Defined for Service Providers:

for Business Users:

A set of certified network elements that connect to transport Carrier Ethernet services for all users, locally & worldwide

A ubiquitous, standardized, carrier-class Service and Network defined by five attributes that distinguish it from familiar LAN based Ethernet

Carrier Ethernet services are carried over physical Ethernet networks and other legacy transport technologies

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Three Types of Specifications • Technical Specifications – They include architectural and abstract models required to create a robust platform of technical requirements and definitions – They are the principal documents that define mandatory and optional elements, attributes etc., of the elements of a Carrier Ethernet network (UNI, Services, NNI, etc)

• Implementation Agreements – These typically quantify specific parameters and attributes called out in the technical specifications so that consistent, interoperable implementation can occur

• Abstract Test Suites – These consist of a series of tests to be used to measure conformance to certain MEF specifications. – They are intended to be used to create specific test plans such as those used in the MEF Certification Program ©2006 RVW, Inc.

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MEF Key Specifications • Architecture – MEF 4, Generic architecture provides a basis for offering services and building out national/international networks

• Services – MEF 6.1 – Ethernet Services Definitions – defines E-Line and E-LAN service types, and defines in detail Ethernet Private Line (EPL) and Ethernet Virtual Private Line (EVPL) service – MEF 10.2 - Ethernet Service Attributes – Phase 2 defines the key UNI and EVC attributes that can be used to build services.

• Abstract Test Suite for Ethernet Services – MEF 9 & MEF 14 - basis for certification of vendor equipment and service provider services ©2006 RVW, Inc.

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Approved MEF Specifications REF

Description

MEF 2

Requirements and Framework for Ethernet Service Protection

MEF 3

Circuit Emulation Service Definitions, Framework and Requirements in Metro Ethernet Networks

MEF 4

Metro Ethernet Network Architecture Framework Part 1: Generic Framework

MEF 6.1

Metro Ethernet Services Definitions Phase 2

MEF 7.1

EMS-NMS Information Model

MEF 8

Implementation Agreement for the Emulation of PDH Circuits over Metro Ethernet Networks

MEF 9

Abstract Test Suite for Ethernet Services at the UNI

MEF 10.2

Ethernet Services Attributes Phase 2*

MEF 11

User Network Interface (UNI) Requirements and Framework

MEF 12

Metro Ethernet Network Architecture Framework Part 2: Ethernet Services Layer

MEF 13

User Network Interface (UNI) Type 1 Implementation Agreement

MEF 14

Abstract Test Suite for Traffic Management Phase 1

MEF 15

Requirements for Management of Metro Ethernet Phase 1 Network Elements

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Approved MEF Specifications REF

Description

MEF 16

Ethernet Local Management Interface

MEF 17

Service OAM Framework and Requirements

MEF 18

Abstract Test Suite for Circuit Emulation Services

MEF 19

Abstract Test Suite for UNI Type 1

MEF 20

User Network Interface (UNI) Type 2 Implementation Agreement

MEF 21

Abstract Test Suite for UNI Type 2 Part 1: Link OAM

MEF 22

Mobile Backhaul Implementation Agreement Phase 1

MEF 23

Class of Service Implementation Agreement Part 1

MEF 24

Abstract Test Suite for UNI Type 2 Part 2: E-LMI

MEF 25

Abstract Test Suite for UNI Type 2 Part 3: Service OAM

MEF 26

External Network Network Interface (ENNI) – Phase 1

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How the Specifications Enable Carrier Ethernet Carrier Ethernet Attributes MEF Specs

Standardized Services Service Management

MEF 2

Reliability

Quality of Service

Scalability

Architecture Area

MEF 3

Service Area

MEF 4

Architecture Area

MEF 6.1

Service Area

MEF 7.1

Service Area

Service Area

Service Area

Service Area

Service Area

Management Area

MEF 8

Service Area

MEF 9

Test & Measurement Area

MEF 10.2

Service Area

MEF 11

Architecture Area

MEF 12

Architecture Area

MEF 13

Architecture Area

MEF 14

Test & Measurement Area

Test & Measurement Area

Architecture Area

Test & Measurement Area

MEF 15

Management Area

MEF 16

Management Area

MEF 17

Management Area

MEF 18

Test & Measurement Area

Test & Measurement Area

MEF 19

Test & Measurement Area

Test & Measurement Area

MEF 20

Architecture Area

MEF 21 & 24

Test & Measurement Area

MEF 22

Service Area

MEF 23

Service Area

MEF 25

Test & Measurement Area

MEF 26

Service Area

Test & Measurement Area

Architecture Area

Architecture Area Test & Measurement Area

Service Area

Service Area

Service Area

Service Area

Service Area

Service Area

Service Area

Test & Measurement Area

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MEF Carrier Ethernet Terminology • UNI Type I – A UNI compliant with MEF 13 – Manually Configurable

• UNI Type II – Automatically Configurable via E-LMI – Manageable via OAM

• Network to Network Interface (NNI) – Network to Network Interface between distinct MEN operated by one or more carriers – An active project of the MEF

• Metro Ethernet Network (MEN) – An Ethernet transport network connecting user endpoints (Expanded to Access and Global networks in addition to the original Metro Network meaning)

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MEF Carrier Ethernet Terminology • The User Network Interface (UNI) – The UNI is the physical interface or port that is the demarcation between the customer and the service provider/Cable Operator/Carrier/MSO – The UNI is always provided by the Service Provider – The UNI in a Carrier Ethernet Network is a physical Ethernet Interface at operating speeds 10Mbs, 100Mbps, 1Gbps or 10Gbps Carrier Ethernet Network CE CE

UNI UNI

CE: Customer Equipment, UNI: User Network Interface.

MEF certified Carrier Ethernet products

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MEF Carrier Ethernet Terminology • Ethernet Virtual Connection (EVC) – – – –

Service container Connects two or more subscriber sites (UNI’s) An association of two or more UNIs Prevents data transfer between sites that are not part of the same EVC – Three types of EVCs • Point-to-Point • Multipoint-to-Multipoint • Rooted Multipoint

– Can be bundled or multiplexed on the same UNI – Defined in MEF 10.1 technical specification

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EVCs and Services In a Carrier Ethernet network, data is transported across Point-to-Point and Multipoint-to-Multipoint EVCs according to the attributes and definitions of the E-Line, E-LAN and E-Tree services

Point-to-Point EVC UNI UNI

UNI UNI

Carrier Ethernet Network

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Carrier Ethernet Service Types (1 of 3): E-Line

• E-Line Service used to create –Ethernet Private Lines –Virtual Private Lines –Ethernet Internet Access E-Line Service type

UNI UNI

Point-to-Point EVC

UNI UNI CE CE

CE CE

Carrier Ethernet Network

MEF certified Carrier Ethernet products

UNI: User Network Interface, CE: Customer Equipment ©2006 RVW, Inc.

Carrier Ethernet Service Types (2 of 3): E-LAN

• E-LAN Service used to create – Multipoint L2 VPNs – Transparent LAN Service – Foundation for IPTV and Multicast networks etc.

E-LAN Service type CE CE UNI UNI

Carrier Ethernet Network

UNI UNI CE CE

Multipoint-to-Multipoint EVC MEF certified Carrier Ethernet products

UNI: User Network Interface, CE: Customer Equipment ©2006 RVW, Inc.

Carrier Ethernet Service Types (2 of 3): E-Tree • Used for Applications requiring Point-to-Multipoint topology – Video on demand, internet access, triple play backhaul, mobile cell site backhaul, franchising applications

• Provides traffic separation between ‘Leaf’ UNIs – Traffic from any “leaf” UNI can be sent/received to/from “Root” UNI(s) but never being forwarded to other “Leaf” UNIs UNI UNI

Root

CE CE

Leaf Leaf

CE CE

UNI UNI

Rooted Multipoint EVC

UNI UNI

Leaf

CE CE UNI UNI CE CE

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Services Using E-Line Service Type • Ethernet Private Line (EPL) – Replaces a TDM Private line – Dedicated UNIs for Point-to-Point connections – Single Ethernet Virtual Connection (EVC) per UNI – The most popular Ethernet service due to its simplicity Storage Service Provider

UNI UNI UNI UNI CE CE

Carrier Ethernet Network

CE CE

ISP POP

UNI UNI

Point-to-Point EVC

Internet

UNI UNI CE CE

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Services Using E-Line Service Type • Ethernet Virtual Private Line (EVPL) – Replaces Frame Relay or ATM services – Supports Service Multiplexed UNI (i.e. multiple EVCs per UNI) – Allows single physical connection (UNI) to customer premise equipment for multiple virtual connections Service Multiplexed Ethernet UNI

ISP POP

UNI UNI

Internet

UNI UNI

CE CE

Carrier Ethernet Network CE CE

CE CE

UNI UNI

Point-to-Point EVC

CE CE

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Services Using E-LAN Service Type • Ethernet Private LAN (EP-LAN) and Ethernet Virtual Private LAN (EVP-LAN) Services – Supports dedicated or service-multiplexed UNIs – Supports transparent LAN services and multipoint Layer 2 VPNs Service Multiplexe d Ethernet UNI CE CE

UNI UNI

UNI UNI

UNI UNI CE CE

Carrier Ethernet Network

Mulitipoint-to-Multipoint EVC

UNI UNI CE CE

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MEF 6.1 Ethernet Services Definitions Phase Port-Based VLAN-Based 2 Service Type (All-to-One Bundling)

(Service Multiplexed)

E-Line (Point-to-Point EVC)

Ethernet Private Line (EPL)

Ethernet Virtual Private Line (EVPL)

E-LAN (multipoint-to-multipoint EVC)

Ethernet Private LAN (EP-LAN)

Ethernet Virtual Private LAN (EVP-LAN)

E-Tree (rooted multipoint EVC)

Ethernet Private Tree (EP-Tree)

Ethernet Virtual Private Tree (EVP-Tree)

No change

Modified

New

MEF 6.1 Enhancements • Defines a new service type (E-Tree) in addition to those defined in MEF 6 • Adds four new services – two each to E-LAN and E-Tree

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Technology Options • Modern Carrier Ethernet – IEEE G.709 (OTN) • “SONET-Like” Framing for Service Transport • Forward Error Correction – Extends Effective Optical Reach

• Transport Performance Monitoring • GCC – General Communications Channel SONET (T1.105) OC‐48 OC‐192 OC‐768

OTH (G.709) OTU1 OTU2 OTU3

G.709 Line Rate OPUk Payload Rate OTUk Frame Period (kbit/s) (kbit/s) (µs) 2,666,057 2,488,320 48.971 10,709,225 9,953,280 12.191 42,836,900 39,813,120 3.035 ©2006 RVW, Inc.

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Technology Options • Modern Carrier Ethernet – IEEE 802.3ah - Ethernet in the First Mile (EFM) – First Ethernet OAM Standard (2004) • • • • •

Remote loopback Remote failure indication Link monitoring Loopback Control Discovery

– Focused on Point to Point Ethernet Link OAM • Does not propagate beyond a single link or hop • Maintenance OAM, not service

– Shares BW with Data Payload ©2006 RVW, Inc.

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Technology Options • Modern Carrier Ethernet – IEEE 802.1ag - Connectivity Fault Management • • • •

Continuity Check (CC) Loopback Linktrace Service level monitoring / Maintenance Domains

– Partitions network into hierarchical OAM regions for fault management – Basic Connectivity and Troubleshooting Across Single or Multiple Domains – CFM is the Foundation for Services OAM ©2006 RVW, Inc.

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Technology Options • Modern Carrier Ethernet – ITU Y.1731 - OAM Functions and Mechanisms – Builds on 802.1ag Functionality and Adds: • Delay Measurement (DM), Delay Variation Measurement (DVM), Loss Measurement (LM) • Alarm Indication Signal (AIS) & Remote Defect Indication (RDI) • Test Pattern and Test Mode – But no test methodology or standard test suite

• Automatic Protection Switching (APS)

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Customer Site

Service Provider 1

Service Provider 2

E-NNI

UNI

Customer Site

UNI

CE CE

CE CE

Access Link OAM

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Link OAM

Access Link OAM

MEF NID

IEEE 802.3ah

MEF NID

IEEE 802.1ag

Connectivity Fault Mgmt OAM

SOAM

Service Layer OAM (UNI to UNI)

ITU Y.1731

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Technology Options • Modern Carrier Ethernet – ITU G.8032 (Ethernet Ring Protection Switching) • Provides sub-50ms protection and recovery • Prevents Layer-2 Loops • Relies on Y.1731 Signal Fail (SF) Message – No current support for degraded signal switching

• Version 2 Adds – – – – –

Interconnected Rings Manual Protection Switching (Force, Manual, Clear) Multiple Ring Instances Revertive / Non-Revertive Switching Block RPL ©2006 RVW, Inc.

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Technology Options • Modern Carrier Ethernet – IETF Useful OAM Standards • RFC 2819/2021/2613 – Remote Monitoring (RMON) – RMON1: Layer 1 and Layer 2 – RMON2: Network and Application Layer – SMON: Switched Networks

• RFC 3176 – sFLOW – Traffic Sampling – Not Real-time information

• RFC 2544 – Ethernet Test Suite

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Technology Options • Modern Carrier Ethernet – Other Advancing Technologies • MPLS / VPLS / MPLS-TP – Layer-2 Services Across Layer-3 Networks

• PBB / PBB-TE – Layer-2 Network Scaling – MAC-in-MAC

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Key Considerations • • • • • •

Bandwidth Requirements and Growth Physical and Logical Architecture Layer-2 Network Scaling Hardware Protection Requirements Service Protection Requirements Access and Core Design Coordination

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Thank You!

Brian LeCuyer, PE (402) 564-2876 [email protected]

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