Ethernet Services over Packet Aware Transport final.ppt

Ethernet Services over Packet Aware Transport

Benefits of Packet-Aware Transport

• History and Goals of Packet Aware TransportHistory and Goals of Packet Aware Transport

• Benefits of Packet Aware TransportBenefits of Packet Aware Transport

• Evolution of SONET/SDH EquipmentEvolution of SONET/SDH Equipment

• Evolution of Ethernet EquipmentEvolution of Ethernet Equipment

• Service Interworking with MPLSService Interworking with MPLS

Ethernet Services over Packet Aware Transport

• History of Packet Aware Transport• Late 1990s: Proprietary Ethernet over Sonet/SDH gear• 2001-present: Standards-based “data-aware Sonet/SDH” solutions

(GFP, VCAT, LCAS)• 2002-present: Metro Ethernet solutions based on pure Ethernet, WDM &

MPLS as pure-packet alternative to Sonet/SDH• 2005: End-to-end architectures evolve beyond point solutions

• Goals for Packet Aware Transport• Reduce capex for packet services transport• Support legacy traffic & services consistent with existing infrastructure• Reduce opex through functional integration of packet & transport• Increase service provisioning times• Improve bandwidth efficiency associated with multiple grades of packet

services transport


Transparently multiplex different types of traffic onto a single Sonet/SDH pipe

Distinguish between high-priority and low-priority traffic within the Sonet/SDH

Bridge converged core IP network & metro/access Sonet/SDH network

Provision services end-to-end using standards-based MPLS signaling

Enable handoff of all services on one universal port

Eliminate the need to crossconnect data services at multiple locations

Aggregate traffic on handoff interfaces to reduce access charges

Converge on Ethernet ports and service for many interfaces

Packet-Aware Transport Model

SONET/SDHSONET/SDH

MPLS Core

MPLSCommon

Core

MPLSCommon

Core

OpticalCore

OpticalCore

AccessEthernet

Packet ADMMSPP

WDM / PON

MetroPacket ADM

Ethernet MSPPRouterWDM

CoreRouter

SONET/SDHWDM

Packet-Aware Transport Network

Virtual Circuits

Universal Port

OC-nPort

OCnOCn

OCn

EthernetEthernet

ATMATM

Frame RelayFrame Relay

CustomerCLE







TDM Centric vs. Packet Centric

FrameATMIPEthernet

FrameATMIPEthernet

Pseudo-wiresPseudo-wires

Access Ring

3/1 DCS

ADMIP

Router

ATMSwitch

FrameSwitch

AccessPacket Ring

Packet-awareMSP

ServiceEdge

• Integrated architectures• Bandwidth-efficient• Hardware cost-effective-• Feature-rich

EvolutionEvolution

FrameATMIPEthernet

FrameATMIPEthernet

TDM-EncapsulatedTDM-Encapsulated

ADM

PL

Data

Same:• Reliability

• Security

• Performance

Same:• Reliability

• Security

• Performance

PrivateLine

Data3/3 DCS

1/0 DCS

Enabling Technologies: Virtual Concatenation

• Radically improves data/Ethernet transport efficiency• More granular than typical Sonet concatenations with full legacy

Sonet compatibility • Dynamically created N x STS1 or N x VT1.5 Sonet channels for

Ethernet transport (N = 1, 2, 3…)

OC192

STS3c

2xSTS1 VC

7xVT1.5 VC

STS1

100-Mbit/s Ethernet

10-Mbit/s Ethernet

Enabling Technologies:Generic Framing Procedure (GFP)

• Carriers required new, more broadly applicable method of mapping new services to their transport networks

• Packet-over-Sonet, native Ethernet, Fiber Channel, ESCON & Resilient Packet Ring (RPR) all map to SDH/Sonet equipment using GFP

IP Data ServicesStorageServices

GE, ESCONFC/FICON

GE, Ethernet RPRATM10GEPDH

DWDM

WIS HDLC

Virtual Concatenation Sonet / SDH

OTN

Fut

ure

Ser

vice

s

Lam

bda

Ser

vice

s

Frame GFP

PPP (POS)

Transparent GFP

Enabling Technologies: Resilient Packet Ring

• 2-fiber ring topology; each station performs: add, drop, copy

• Data rates of 155-Mbit/s to 10-Gbit/s & beyond

• Packet-based traffic management for 3 classes of service

• Sub-50ms protection for all services

• Bandwidth efficiency

• Efficient statistical multiplexing

• Spatial reuse

• Protection per CIR, and not per channel

• Fairness (weighted)

• Support for both Sonet & Ethernet PHY

MAC BW

Monitor

SONET Evolves for Packet Efficiencies

Sonet/SDH PHY

TDM Fabric

Traditional ADM

STS-1 VT1.5

Sonet/SDH PHY

TDM Fabric

Hybrid ADM

STS-1 VT1.5 Packet Services

Sonet/SDH PHY

Packet Fabric

Service Aware ADM

STS-1,VT1.5

Packet Services

Time

• Add/drop circuits

• No support for packet services

• Distributed DXC

• Mapping of packet services to circuits

• Some local packet switching

• Optimized for packet multiplexing

• Mapping of circuits over packets

• Traditional synchronization

Circuits Packets







Core POPCentral ExchangeMetro Network

Local ExchangeAccess Network

Customer

Managed Ethernet access

Data services

Dual-homing for higher availability

Physical ring or pt-pt mesh

optionsPositives• Very low CAPEX

• Inexpensive compact units

• Efficiency through aggregation

• Very low OPEX

• Simple to deploy and operate

• Full OAM

• Connection oriented approach

• Carrier class

• Secure traffic separation

• Scalable

• Future proof

Ideal for profitable mainstream rollout Ideal for profitable mainstream rollout

Carrier-class Ethernet mixed deployment

Aggregation

Demarcation x 10

P

PE PE

Aggregation 2

x 10

Aggregation

& switching

x 10 x 10

x 10Aggregation

Demarcation

Metr

o c

ore

Metr

o a

ccess

CP

Aggregation network putting it all together

Integrated Ethernet access infrastructure

for enterprise, business and retail

market

Aggregation and demarcation layer

Metro PoP

Service edgeswitch or router

ProtectedGigabit Ethernet

ring

Business /retail

Enterprise /business

10 x 10/1006 x 10/100/1000

FE

FEGE

GE

Network services

layer

Scalable Ethernet access solutions

Secure connection oriented transport Statistical multiplexing Flexible bandwidth options from 1 to 1000Mbit/s Most cost-effective solution for carrier mass rollout

Metro Ethernet Ethernet

Ethernet

Cu

st o

mer

pr e

mis

e

FSP Management Suite

Metr

o

access

Port aggregation

Port aggregation

Port extension

Port extension

Ethernet backhaul Ethernet backhaul

Metr

o

core

Extending Ethernet Transport into core transport

• Rapidly scale and add new Ethernet services over existing fiber infrastructure• Extend distances up to hundreds of kilometers• Natural extension in to core/access transport

Logical connection

FSP Management Suite

Ethernet Ethernet

LevelOfAggregation







MPLS Evolves the Metro

FSP 150CP

FSP 150Mx

FSP 150CP

PoP#2PoP#1

FSP 150CP

x10 x10

FSP 150CP

x10 x10

PoP#4PoP#3

FSP 150MxFSP 150Mx

VLAN/MPLS/IP mapping

in metro edge device

The Internet

Internet peering

location

Customer A logical path

Customer B logical path

Access

infrastructure

Metro core

MPLS Evolves the Metro and Core

• MPLS-enabled core network brings packet-awareness• Network services defined at the edge of the MPLS

core network• Enhanced Ethernet switching services• Other IP-enabled services, e.g., IP VPN, DIA, VOIP

Optical Core

Transport

IPNetwork

IPNetwork

MPLSCommon

Core

MPLSCommon

Core

Voice Network

ATM/FR NetworkFR UNI

Ports/IPFRT3FR

IMA NxT1FR NNI

ATM UNIEthernetDS1/DS3

OC-3/12/48PPP/HDLC

ATMIPEthFR

Optical Core

TransportEvolution

Ser

vice

Edg

e

Ethernet Services over Packet Aware Transport final.ppt

Documents

ethernet services

local packet

ethernet transport n

dxc mapping of packet

purepacket alternative

mbits ethernet

pure ethernet

native ethernet