New Generations Networks (NGN)

Multiservice SDH Provisioning Platform. (MSPP)Optical Transport Networks (OTN)

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The Keys to Ethernet Services Success

Rapid return on investment. Recoup capex in under a year, model deployed leverages legacy transport infrastructure.

Legacy compatibility and interoperability.leverage the installed base of transport and packet services infrastructure

Bandwidth efficiency.Ethernet must be transported as efficiently as possible, with options for statistical multiplexing and efficient mapping to SDH/SONET transport bandwidth.

Resiliency.Solution with strict protection and restoration capabilities equivalent to today’s services carried over a SDH/SONET infrastructure.

Comparable profiles to existing Layer 2 services. Customers have expectations of service quality, service guarantees, security and service flexibility that must be matched by Ethernet.

End-to-end management, monitoring and provisioning.

It can easily be summarized into two broad goals:

1) Optimize the Transport Network for Ethernet2) Optimize Ethernet for the MAN and WAN

The Four Pillars of Next-Gen SONET

1) Virtual Concatenation (VCAT), an inverse multiplexing technique that supports the

bundling of multiple independent lower-rate channels (STS-1/VC-3, VT1.5/VC-11) into

a higher rate channel. ITU-T G.707/Y.1322 and G.783

2) Link Capacity Adjustment Scheme (LCAS), a method of dynamically provisioning

and reconfiguring TDM channels to suit customer needs or carrier bandwidth

management requirements. ITU-T G.7042/Y.1305

3) Generic Framing Procedure (GFP), a universal traffic adaptation protocol for the

mapping of all broadband transport, be it Ethernet, IP, Fibre Channel, or other block-coded or packet-oriented data streams, into SDH/SONET or the Optical Transport

Network (OTN). ITU-T G.7041 (2001) & ANSI T1.105.02 (2002)

4) Generalized Multiprotocol Label Switching (GMPLS), a family of protocols under

development by the IETF designed to extend MPLS to encompass SDH/SONET

channels, wavelengths and even whole fibers. The ultimate payoff of GMPLS will be

its ability to improve end-to-end management and operations of a transport network

while supporting the dynamic provisioning of resources. IETF draft-ietf-ccamp-gmpls-sonet-sdh-08.txt and draft-ietf-ccamp-gmpls-architecture-07.txt

Protocolo de la

señal del cliente

Bit Rate SDH

Tradic.

% de

Utiliz.

SDH con

Concaten.

Virtual

% de

Utiliz.

Ethernet 10 Mbps VC-3 20% VC-11-7v 89%

Fast Ethernet 100 Mbps VC-4 67% VC-3-2v 99%

Gigabit Ethernet 1000 Mbps VC-4-16c 42% VC-4-7v 95%

Low Speed ATM 25 Mbps VC-3 50% VC-11-16v 98%

ESCON 200 Mbps VC-4-4c 32% VC-3-4v 100%

Fibre Channel 1000 Mbps VC-4-16c 42% VC-4-7v 95%

Eficiencia de la utilización del ancho de banda con concatenación virtual

VCAT

LCAS agrega:

dynamic protection management

dynamic bandwidth management.

LCAS

LCAS

The Drivers for GFP

•Standards-based method of adapting multiple protocols, including storage transport, to SDH/SONET and the OTN

•Alternative to byte-stuffed HDLC-based framing, which suffers from frame length inflation (variable

payload expansion), making capacity planning difficult for high-speed Ethernet services

•Applies to any SDH/SONET tributary or virtual concatenation group

•Improved support for Ethernet-based services, including uniform mapping across all Ethernet

•types, preservation of Ethernet MAC layer information and FCS Improved security over HDLC-

based framing though the use of HEC-based delineation

•Protocol independent aggregation from multiple client interfaces without the requirement for

protocol awareness

•Native packet-oriented transport mechanism to enable alternative path protection and statistical

multiplexing support in point-to-point, linear add-drop, and ring

topologies

GFP Values

•Transparent Encapsulation/Decapsulation preserves Control Info

•Virtually-concatenated paths sized to fit individual client signals

•Client signals preserved intact through the network

•Signals routed by switching VC paths (STS-1/VC-3 or STS-3c/VC-4 switching)

•Mix of protocols may be carried, each in its own VC path

The client-specific processes of GFP are categorized by the two types of client signal payload adaptation, either Frame-Mapped GFP, which applies to most packet data types, or Transparent GFP, applicable to most 8B/10B block-coded signals.

Frame-mapped GFP is currently the most widely employed form of GFP in use today, as it applies to Ethernet MAC frames, PPP/IP packets or any HDLC-framed PDU.

Transparent mapped GFP was designed with SAN transport in mind, as all code words from the physical interface of the client signal are transmitted. Since low transmission latency is required for storage transport, it was important to create a mapping mode that did not require waiting until the last bit of a client frame has arrived.

Combined with VCAT and LCAS, GFP enables MSPP vendors to both conform to international standards while building a truly next-gen solution for high-value data services transport.

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* Este trafico puede rodar directamente sobre fibra

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GMPLS and the Intelligent Optical Control Plane

The final pillar of the evolving next-gen SDH concept is an intelligent control plane.

Way to transform the operation and management of their transport networks from one of manually provisioned static “pipes” to one that is more dynamic and network aware.

Once IP networks evolved to support a distributed control plane, capable of managing end-to-end label-switched packet flows using MPLS, transport network operators began to contemplate an intelligent control plane that mimicked the structure ofMPLS (with its distinct data forwarding plane and control plane) but applied that intelligence to TDM timeslots, wavelengths and fiber interfaces.

To realize this vision, the intelligent control plane must perform the following four tasks:

Resource discovery: Learn the set of network elements, the available interfaces, and the topology of links between those interfaces.

Path calculation: For a particular service, calculate a path across the network that makes efficient use of the network elements and links.

Service signaling: Configure each network element in the path with all the parameters needed to turn up the service.

Policy enforcement: Guide the automatic behavior of the control plane.

GMPLS addresses the need to push the MPLS control plane beyond packet-switched interfaces to transport network interfaces.

GMPLS generalizes the two key elements of MPLS, labels and LSPs (label switched paths) (the paths set-up by the MPLS) . Labels need no longer be embedded in the packet stream itself, but instead

serve as a means of establishing cross-connections among transport network

interfaces.

Within GMPLS, LSPs are no longer associated only with the transport of

packets, frames or cells – they can be SDH LSPs, lambda LSPs, or fiber LSPs

(also the called trails).

Generalized labels, LSP hierarchy, Link bundling, IGP extensions, Signaling extensions, Fault detection, fast recovery and a Link Management Protocol (LMP), all in one stage of development or another within the IETF.

ITU-T has its program Automatically Switched Optical Network: G.807/Y.1302 Requirements for the Automatic Switched Transport Network (ASTN), and G.8080/Y.1304 Architecture for the Automatic Switched Optical Network (ASON).

GMPLS and the MSPP

Dynamic bandwidth management and automatic end-to-end provisioning of circuit (SONET) and packet-based (Ethernet) services

Point & click control via EMS/NMS reduces service activation times from weeks to seconds

Determines best path based on defined constraints and all switches are automatically configured

Ring, mesh and hybrid network topologies

Based on standards (IETF, ITU, OIF) to ensure carrier-grade reliability and interoperability

TDM Multiplexing

DS1

DS3

STS-48

DS3

DS3STS-48

Tunneling Using MPLS LSP's Is Analogous To TDM Multiplexing

From MPLS To GMPLS

LSP 7

LSP 11

LSP 42

LSP 3

LSP 88

POP 3PUSH

77

SWAP 7=>11PUSH 42

1142

SWAP 42 => 88

1188

POP 88SWAP 11=>3

3

Implicit Label(1)

Implicit Label(2)

STS-192 (1) STS-192 (2)

GMPLS: Generalized MPLS

Hybrid Ethernet over SDH/SONET MSPP Switch design

By staying within the bounds of Layer 2, with additional support for priority queuing, as well as 802.1Q and double .Q VLAN tagging of specific flows, multiple classes of traffic can be supported. This enables traffic to be shaped, classified and prioritized on a per-VLAN, per port or per subscriber basis to provide service level agreements (SLAs)

SPN Service Provider Network

VLAN Virtual LAN

C-VLAN Customer-Virtual LAN

TLS Transparent LAN Services

Extending the Richness of Ethernet Services with Virtual RPR

The use of the IEEE’s emerging standard Resilient Packet Ring(RPR)(IEEE 802.17) in the Layer 2 to further optimize the platformaround Ethernet improved bandwidth utilization and per-flow protection at 50 ms or less.

The goal of the IEEE RPR initiative is to define and standardizea protocol suite optimized for high-speed packet transmission inring topologies, combining the resiliency of fiber rings with the statistical multiplexing and QoS capabilities of a packet-optimizedMAC protocol.

Why Use RPR in an MSPP?

Enable a high capacity, shared 10GE RPR core ring

Support multiple virtual RPR rings over VC-3-Nv PHY

Perform L2 core switching and transport of low-speed and/or high port count

VPNs

Reduce or eliminate the need for external switches

Complement direct edge switching of high-speed and low port count VPNs

Use Virtual Concatenation to create VPNs over shared or dedicated logical

connections

Provide carrier-class 50ms restoration per flow during fiber cuts or equipment

failures

Objective – Be a gateway to core MPLS networks by aggregating and

performing EoMPLS encapsulation

Cisco DPT/RPR Solutions Optimize the Metro Optical InfrastructureOptimize the Metro Optical Infrastructure

• Powered by Dynamic Packet Transport (DPT), the market-leading Resilient Packet Ring (RPR) solution for unparalleled simplicity, scalability and reliability

• Based on the Cisco-developed Spatial Reuse Protocol (SRP) – IETF Informational RFC 2892

• Submitted to IEEE 802.17 Working Group (Cisco Group Chair) for consideration as the RPR industry standard

Outer Ring

Inner Ring

Outer RingData Outer Ring

Control

Inner RingData

Inner RingControl

Over 200 DPT

Customers Worldwide

Over 200 DPT

Customers Worldwide

Over 15,000 ports

deployed

Over 15,000 ports

deployed

Dynamic Packet Transport (DPT) Technology OverviewTechnology Overview

• Eliminates SONET/SDH equipment for IP transport while retaining resilience benefits

• Intelligent Protection Switching (IPS) provide fast ring restoration (< 50ms)

• Minimize provisioning configuration and maintenance requirements

• Transport independent (Dark Fiber, SONET/SDH, WDM)

DPTRing

Working Working

Dynamic Packet Transport (DPT) Technology OverviewTechnology Overview

• Dual counter rotating rings - Data transport on both rings

• Control messages carried in opposite direction from data

• Maximize bandwidth efficiency for IP services

• Extend reach of distributed IP functionality over metro area

Outer Ring

Inner RingInner Ring

Outer RingData

Outer RingControl

Inner RingData

Inner RingData

Inner RingControl

Inner RingControl

MODELO MAC DE UN NODO DE RED

MANEJO DEL ANCHO DE BANDA

MANEJO TRADICIONAL DE LA ARQUITECTURA DE PAQUETES

ARQUITECTURA DE PAQUETES MAC RPR

ITU-T Recs. on IP (Y.1000 Series)

Y.1000 - Y.1099

Y.1100 - Y.1199

Y.1200 - Y.1299

Y.1300 - Y.1399

Y.1400 - Y.1499

Y.1500 - Y.1599

Y.1600 - Y.1699

Y.1700 - Y.1799

Y.1800 - Y.1899

General

Services and applications

Architecture, access, network capabilities

and resource management

Transport

Interworking

Quality of service and network performance

Signalling

Operation, administration and maintenance

Charging

Y Series Area

Status of Standardization

Current Recs. on IP (Y.1000 Series)

Y.1001 (11/2000) IP Framework – A framework for convergence of telecommunications network and IP network technologies

Y.1221 Draft Traffic control and congestion control in IP-based networks

Y.1231 (11/2000) IP access network architecture

Y.1241 (02/2001) Support of IP-based services using IP transfer capabilities

G.871/Y.1301

(10/2000) Framework of Optical Transport Network Recommendations

G.807/Y.1302

(05/2001) Requirements for Automatic Switched Transport Networks (ASTN)

G.7041/Y.1303

(12/2001) Generic framing procedure (GFP)

G.8080/Y.1304

(11/2001) Architecture for the Automatically Switched Optical Network (ASON)

G.7042/Y.1305

(11/2001) Link capacity adjustment scheme (LCAS)

Y.1310 (03/2000) Transport of IP over ATM in public networks

Y.1311 (consent 02/2002)

Network-based VPNs - Generic architecture and service requirements

X.85/Y.1321 (03/2000) IP over SDH using LAPS

G.707/Y.1322Cor. 1Cor. 2Amendment 1

(10/2000)(02/2001)(11/2001)(11/2001)

Network node interface for the synchronous digital hierarchy (SDH)

X.86/Y.1323 (02/2001) Ethernet over LAPS

G.709/Y.1331Amendment 1

(2/2001)(11/2001)

Interfaces for the Optical Transport Network (OTN)

Status of Standardization

Current Recs. on IP (Y.1000 Series)Y.1401 (10/2000) General requirements for interworking with Internet

Protocol (IP)-based networks

Y.1402/X.371

(02/2001) General arrangements for interworking between Public Data Networks and the Internet

I.351/Y.801/Y.1501

(10/2000) Relationships among ISDN, Internet Protocol, and GII performance Recommendations

Y.1530 (05/2002) Call processing performance for voice service interworking in ISDN and IP networks

Y.1540 (ex I.380)

(02/1999) Internet Protocol data communication service – IP packet transfer and availability performance parameters

Y.1541 (02/2002) Network performance objectives for IP-based services

G.7710/Y.1701

(11/2001) Common equipment management requirements

G.7712/Y.1703

(11/2001) Architecture and specification of Data Communication Network (DCN)

G.7713/Y.1704

(12/2001) Distributed call and connection management

G.7714/Y.1705

(11/2001) Generalized automatic discovery

G.7715/Y.1706

(05/2002) ASTN routing

G.7716/Y.1707

(05/2002) ASTN link connection status

Y.1710Cor. 1

(07/2001)(02/2002)

Requirements for OAM functionality for MPLS networks

Y.1711 (02/2002) OAM mechanism for MPLS networks

Status of Standardization

Y.2000 Series of Recommendations for NGN (Planned)

Y.2000 Series NGN Frameworks and Functional Architecture ModelsY.2100 Series Quality of Service and PerformanceY.2200 Series Service Aspects Y.2210 Series Service Capabilities and Service Architecture Y.2250 Series Interoperability of Services and Networks in NGNY.2300 Series Numbering, Naming and AddressingY.2400 Series Network ManagementY.2500 Series Network Control Architecture(s) and ProtocolsY.2700 Series SecurityY.2800 Series Generalised MobilityY.2900 Series (Spare)

Status of Standardization