Arquitecturas de Acceso Multiservicio

8/16/2019 Arquitecturas de Acceso Multiservicio

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©2008 Cisco Systems, Inc. All rights reserved. Cisco PublicCisco Networkers

Argentina 2008 1


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© 2008 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 2

Carrier Ethernet Aggregation Architectures

Istvan K ako ny i - ikakonyi@ cisco.co m


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Recuerde siempre…

1. Apagar su teléfono celular mientras dure la sesión.

2. Completar su evaluación y entregarla a la asistente de sala.

3. Ser puntual en todas las actividades de entrenamiento,almuerzos y eventos sociales para lograr un desarrollo óptimo

de la agenda.

4. Completar la evaluación general incluida en su material y

entregarla el miércoles 12 de Noviembre durante la tarde.


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Argentina 2008 4

Agenda1. The Evolution of Multimedia Services2. Standard Background: DSL Forum’s TR-101

And Cisco’s implementation

3. Aggregation Network Vision and RequirementsNot all services are equal

4. Aggregation Network Transport OptionsEthernet? MPLS? IP?

How video influences the choice

5. Aggregation Network Architectural ViewsHow to put things together?

6. Carrier Ethernet Aggregation System 1.5

An end-to-end architecture for business, residential and wholesaleservices

7. SummaryNow and the future


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Argentina 2008 5

The Evolution ofMultimedia Services


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Argentina 2008 6

Evening—Home and About Town

Morning—Commute Day—Office

Use Phone as a Walletand Ticket

Conduct TelepresenceMeeting

Watch TV on Train, ProgramDVR for Tonight

Find Child’s GPSLocation on TV

Watch Shows on Demand,Answer Video Call on TV

Child’s Game and UpdateVirtual Community Pages

en Route Home

The Connected Life


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Argentina 2008 7

Customer Profiles & Traffic Mix isChangingNew Demands, New Opportunities

2004 2008

24,500 TB /month 654,000 TB /month

93% CAGR

172,000 TB /month 1,190,000 TB /month

47% CAGR

B u s i n e s s

C o n s u m e r

Rise ofVideo / IPTV

Proliferationof Business

Broadband

Consumer Broadband(TB / month)Consumer VoIP(TB / month)ConsumerIPTV / VoDConsumer FTTH(TB / month)

Business DSL

IP VPN

Private Line(IP Portion)

Ethernet

ATM / FR(IP Portion)

Source: Cisco Estimates, Ovum, Bernstein, Public Company Data


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Argentina 2008 8

Service Innovation Is Key to

Incremental Revenue Generation

PSTNPSTN

… … …

OA&MOA&M

CPE

Voiceapps

Enterprisedata

Consumerdata

Framerelay/ATM

Framerelay/ATM

Internetaccess

Internetaccess

OA&MOA&M OA&MOA&M

Existing servicedelivery approach

CostlySlow to market

IntegratedOne-size-fits-all

3 rd party applications

Network services / Intelligent IPinfrastructure

Network services / Intelligent IPinfrastructure

… … …

OA&MOA&M

Open service deliveryOpen service deliveryCPE

NGSPapps

ASP Content

NGSP destination

EfficientRapid response

OpenPersonalized

Open service deliveryfor faster innovation

& competitivedifferentiation

Flexible businessmodels to matchservice lifecycle


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Argentina 2008 9

ResilientResilientConvergedConverged

§Singlenetwork for

business andresidential

services

IntelligentIntelligent

§Serviceintelligenceapplied asrequired

throughout thenetwork

ScalableScalable

§Dramaticincreases inbandwidth,

subscribers,and services

IP NGN Carrier Ethernet

Key Attributes

§Industry’smost resilient

end-to-endsolution


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Argentina 2008 10

SP Network Evolution and Consolidation

Physical Layer Physical Layer

L3 Services

ATM

SONET/SDH

Physical Layer

cWDMdWDMFibre

cWDMdWDMFibre

• Evolution not revolution• Minimal Layering• similar control plane

in aggregation and coreYesterday

Optical Layer(IPoWDM)

L1/L2/L3 Services via IP/MPLS

High BandwidthOptical Services

Tomorrow

• Historic Growth• Not built for packet initially• Diff. Departments• High OPEX due to layering


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Argentina 2008 11

IP NGN: Converged Topology

Physical Layer

L1/L2/L3 Services

Basic high SpeedTransport

Internet

1. Optical layer

Dark fibre and / or DWDM

Basic non-oversubscribed point to point high bandwidth services

Under lying transport for IP/MPLS infrastructure

2. IP/MPLS

Based on an end to end IP/MPLS control planeConcurrent support of L1, L2, L3 services

MPLS for ‘Connected oriented’ properties with Traffic Engineering, Path protection (AND LINK and NODEprotection!!), P2P AND MP2MP, Superior and absolute QoS (RSVP-TE)

3. Flexible injection and service points

L1/L2/L3 Services

Internet

L1/L2/L3 Services

Internet


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Argentina 2008 12

DSL Forum’sTR-101

An Architecture for Ethernet Aggregation of DSL Access Nodes


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Argentina 2008 13

DSL Beyond Best Effort ?

1. Significant current interest in making residential DSL morethan a best effort service

Lower initial cost of entry and incremental revenue through valueadded services

Dynamic bandwidth services – bandwidth on demandDifferentiated services support voice, broadcast TV, video telephony,

video-on-demand

2. Number of catalystsDSL forum TR-59 (ATM Aggregation) and now TR-101

(Ethernet Aggregation)

Ethernet to the home deploymentsIPTV service delivery maturing

MPEG-4 part 10 / media player 9

Broadcast quality video at ~1.2mbps


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Argentina 2008 14

TR-101 Scope and Content

1. Technical considerationsVLAN architecture

Multicast considerations

Use of a video optimised Service Router(next to ‘traditional’ TR-59 type BRAS)

Resilience in the Ethernet Aggregation Network

QoS in the Ethernet Aggregation Network

Ethernet OAM

Support for PPPoA and IPoA (aka interworking betweenXoA and XoE)

Note: TR-101’s introduces the term Broadband Network Gateway (BNG)to differentiate from the legacy ‘BRAS’ termFor more information : http://www.dslforum.org/techwork/tr/TR-101.pdf

Ethernet Aggregation

BNG (Video)

BNG (BRAS)DSLAM

DSLAM


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Argentina 2008 15

VLAN Architecture: VLAN per User (1:1)1. VLAN use similar to ATM i.e.

connection oriented i.e.configuration intensive

2. IEEE802.1ad – Inner Tag =Port Identifier, Outer Tag =

DSLAM Identifier 3. Multicast replication inside

Single BNG, not insideEthernet AggregationNetwork

4. Multi-homing to 2 BNGsis complex

5. Good for p2p businessservices ; less ideal forTriple-Play Services

Access

Aggre-gation


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Argentina 2008 16

VLAN Architecture:

VLAN per Service/SP (N:1)1. Single tagged (802.1Q or

802.1ad) VLANs – Doubletagging not needed

2. Connectionless provisioningbenefit ; Access Nodeinserts Line ID (DHCP Opt82 , PPPoE Intermediate

Agent)

3. Network elements take careof subscriber MAC isolationthrough ‘ split horizonforwarding ’

4. Multiple injection points per

VLAN (BRAS AND VideoService Router) possible

5. Multicast replication withinaccess/Aggregation

Access Aggre-gation


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Argentina 2008 17

Ethernet Aggregate QoS Within the

Access/Aggregation Network

1. Per class scheduling within access/Aggregation network

2. Per class scheduling is essential for video as the access node is effectively amulticast insertion/replication point (replicating per subscriber line)

3. Per class scheduling essential when separate video BNG is deployed

Video BNG

BNG (BRAS)

IPTV/VoDCBR or VBR

2mbps – 3.9mbps

Video trafficuniquely markedand placed onAggregation

network§ Work preserving scheduler § Static configuration on user link

100kbps

3mbps

PQ

Voice (Priority Queue with policingat 100kbps)

Internet (shaped or policed at3mbps)

120kbps

4.5mbps

unspecified

PQ

6mbps

AggregationAccess


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Argentina 2008 18

DSLAM Packet Scheduling

1. ATM technology on last mile

2. Forwarding and service priority unified (ATM VC)

3. With Ethernet forwarding (802.1Q VLANs) and priority(802.1p priority bits) are distributed

4. Packet forwarding using:802.1Q VLAN to VC mapping

5. Service priority using802.1p priority to VC mapping, or

802.1p based scheduling across a single VC


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Argentina 2008 19

Video BNG

Cisco’s TR-101 Architecture

…from Discrete Elements

L2 Aggregation withIGMP Snooping

BNGBRAS

Residential

STB

Aggregation Node:Carrier Ethernet Switch/

Service Router withAggregation function


Service Router with

Aggregation function

BNG/BRAS extremely important for PPPServices/migration/legacy ATM support

IP/MPLS Core

Business

Corporate


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Argentina 2008 20

Video BNG





Cisco’s TR-101 Architecture

…via Video Optimization

Residential

STB

Business

Corporate

BNGBRAS

IP/MPLS CoreL2 Aggregation+ L3 IP/PIM-SSM

BNG/BRAS extremely important for PPPServices/migration/legacy ATM support


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AggregationNetwork

Architecture:Vision andRequirements

Towards a Converged Infrastructure for Quad-Play,Wholesale and Business Services


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Argentina 2008 23

Cisco IP NGN ArchitectureDelivering the Connected Life over Ethernet

DataCenter

Presence-Based

TelephonyWeb

ServicesMobileApps

IPContactCenter

A p p l

i c a t

i o n

L a y e r

S e r v i c e

L a y e r

O p e r a t

i o n a l

L a y e r

ServiceExchange

Open Frameworkfor Enabling‘Triple Play on

the Move’(Data, Voice,

Video, Mobility)

Identity Po li cy Bil ling

Mobility

SelfService

Video andGaming

IntelligentEdge

Customer Element

MultiserviceCore

Access /Aggregation

N e t w o r k

L a y e r

Transport

Intelligent Networking

S e c u r e

N e t w o r k

L a y e r

Carrier Ethernet

IPoDWDM

IP/MPLS


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Argentina 2008 24

Cisco Carrier Ethernet Services

MEF 9 & MEF 14 Certification

EPLCisco CNS 15454 CE-Series

EPL, EVPL, E-LANCisco ONS 15310 MA ML Series

EPLCisco ONS 15310 MA CE-Series

EPL, EVPL and E-LANCisco ME 6524 Ethernet Switch

PendingCisco ME 3400 Ethernet Access Switches

EPL, EVPL and E-LANCisco CNS 15454 ML-Series

EPLCisco CNS 15310 CE-Series

EPL, EVPL and E-LANCisco CNS 15310 ML-Series

EPL, EVPL and E-LANCisco 7600 Series Router - Cisco 7600 SeriesSupervisor Engine 720

EPL, EVPL and E-LANCisco Catalyst 6500 Series Switch - Supervisor 32

EPL, EVPL and E-LANCisco Catalyst 6500 Series Switch - Supervisor 720

EPL, EVPL and E-LANCisco Catalyst 4948 - 10G

EPL, EVPL and E-LANCisco Catalyst 4500 Series

EPL, EVPL and E-LANCisco Catalyst 3750 Metro Series Switch

Carrier Ethernet Services CertifiedSystem Name

In original testing (Sept 05), 16 Vendors Participated &Cisco Represent 25% of all Platforms Certified


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Cisco Aggregation Architecture Is

Aligned with Major Standardization Efforts

CPE

Aggregation Core

Access

TransportTransport

NNIEdge

UNIEdge

Focus on the User-Perspective:Ethernet Services, UNI/NNI,Traffic Engineering, E-LMI, ...

SP-Ethernet: Provider Bridges(802.1ad); EFM (802.3ah);Connectivity Management –OAM: 802.1ag; 802.1ah BackboneBridges, 802.1ak MultipleRegistration Protocol, 802.1ajMedia Converters, etc.

L2VPN, PWE3 WG – Building theNetwork Core: VPWS, VPLS

SG15/Q12, SG13/Q3; Architectureof Ethernet Layer Networks,Services etc. – from a Transportperspective. E2E OAM.

Ethernet to Frame-Re lay/ATM

Service Interworking

TR-101 alignment : BRAS-requirements, EthernetAggregation / TR-59 evolution,subscriber session handling, …

1. Ethernet technologies maturingfor Carrier AggregationNetworks

2. IEEE and IETF provideEthernet and MPLS

Aggregation options

3. DSL Forum defines architecturemodels for EtherDSL

Aggregation

4. MEF defines Ethernet servicesand UNI options

5. Cisco Systems has an activerole in these standards bodies


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Argentina 2008 26

Video/IPTV Is Key but Hardest to Deliver Video Challenges

1. High Quality of Experience (QoE)2. Differentiated offer / content explosion3. Niche and local content4. Growth of “on-demand” TV5. Need to deploy new services

6. Impact of “over the top” video

1. Stringent packet loss requirements2. Accurate CAC for VOD3. Efficient multicast for local insertion and

to accommodate new services4.


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Argentina 2008 27

1. Service = CIR/PIR pipe withapplications hosted by third parties

2. SLA defined by transport parameters3. Residential HSI = 5Mbps down, 1Mbps

up, no guarantee for streaming quality4. Business VPN = CIR & PIR, jitter,

delay, loss guarantees, no app.guarantees

1. Application hosted by provider 2. SLA is defined by Quality of Experience

(QoE) expectation3. Video = 1 artifact per 2 hour movie4. Voice = no sound quality impairments,

blocked calls rare

Network QoS Requirements1. Shape & drop packets over CIR,

leverage TCP back-off

2. QoS can change dynamically per sub(turbo button, bandwidth on demand)

3. Transport SLA must be enforced persubscriber

Network QoS Requirements1. QoE mapped to network QoS

requirements

2. QoS same for all subs of a particularapp

3. No need to enforce transport SLA persub, user per-service SLA instead

Managed Application Service

HSI and Business VPNS Residential VoIP and Video

Transport Service

Theme of Application Management Emerges

Transport Services vs. Managed Application Services


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Argentina 2008 28

Generalizing SP Ethernet AccessEvolving the Original Idea of the Ethernet Service Bus

1. Ethernet began as shared media tap points for workstationsand bridges

2. Leverage the multipoint nature of Ethernet in SP access.There is a lot of value here…

Service insertion point economics

Optimizing transport capex > per Gbps cost of Ethernet is far the best

Optimizing transport opex > using E-OAM applications

Metcalfe’s Original Concept of Ethernet (1976)


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Application Mix Can Require

Multipoint at Sequential Hops

1. Cost Optimization (OPEX and CAPEX) leads to multiple service insertions2. Application Servers only have *limited* economic ability to move towards or away

from Residential Gateway (RG)3. Application Layer Services don’t care if insertion points are L2 or L3 Network

Elements, and whether they bridge, route, use MPLS, Ethernet or SDH as atransport

Multicast Replication

PPP TerminationPPP Tunnel SwitchIP Routing

Cost EffectiveVideo Insertion

Snoop all Streams InsertUnicast for Channel Changesand retransmissions

Elements can be combined

MulticastUnicast

Cisco Visual Quality Experience (VQE)


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The Multi-Edge Architecture

View from CE: Ethernet Tap Points by Application

1. Different L3 Edge by service, services can be added and managed independently

2. SP Edge physically could be one L3 box, but likely is manyNo more ‘God-Box’

Geographic segmentation of application servers

Distributing IP on a per service basis rather than using common L2 transport

Services needing per subscriber policies (internet, peer2peer, Lawful Intercept) inserted centrally, while

‘simpler’ services (IPTV, VoD) are distributed3. Allows services & transport to be reused across a variety of access technologies

4. Intermediate tunneling technologies transparent to the CE .Can use Ethernet Bridging (802.1ad or Backbone Bridging, 802.1ah) and/or MPLS pseudo-wires

Modular L3 Edge ? Ethernet Tap Points


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Argentina 2008 31

Next-Generation Transport

Requirements

Policy Plane (per Subscriber)

Identity AddressMgmtSubscriberDatabaseMonitoring

PolicyDefinitionBilling Presence Mediation

SingleTier

Hub &Spokeor Ring

Aggregation L3 ServiceEdge

L3 Core

Portal

Business

Residential

AG

Mobile

CPE

DSL/PONCable

Ethernet

E1/ATM

Access

FR/ATM

Corporate

Ethernet

Point to PointPoint to MPMultipoint

Legacy Services

ATMFrame Relay

TDM

NGN Application

Efficient IP MulticastEfficient VoD DeliveryCall Admission Control

Others

Standards BasedCost Effective

QoS, TE & RecoveryFast Provisioning


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Argentina 2008 32

Aggregation

Network ArchitectureTransport Options

IP, Ethernet Bridging, MPLS, or … ?


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Argentina 2008 33

Aggregation Network Transport Options

DSLAccess Node

DistributionNode

BRAS

MPLS PE

SCEBusiness

Corporate

Residential

STB

AggregationNode

AggregationNode

CoreNetwork

IP / MPLS

Business

Corporate

Business

Corporate

AggregationNode

SiSi

EthernetAccess Node Aggregation Network

MPLS, Ethernet, IP

DistributionNode

Access L2/3 Edge

VoD

Content Network

TV SIP

SiSi

SiSi

SiSi

SiSi

VoD

Content Network

TV SIP

Layer 3 - IP, MPLS

„ Distributed L3 Service Edge “

Layer 2 – EthernetIEEE 802.1q / 802.1ad

„ Centralised L3 Service Edge “

802.1q

Layer 2 – MPLSEoMPLS/ H-VPLS

„ Centralised L3 Service Edge “

EoMPLS


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Argentina 2008 34

How to Build the L2/L3 BUS (Ethernetor MPLS?)The Logical Picture

1. Some Services might require L2 replication (Video Multicast) i.e. VLANs(“N:1” or multipoint VLANs)

2. Some Subscribers are receiving traffic from multiple L3 nodes i.e. N:1VLAN with MAC-address based forwarding

3. Other Services can be built with point to point constructs (“1:1” VLANs)Requires a lot of provisioning in access and aggregation network!Does not easily allow different edges per subscriber

4. MPLS or native Ethernet used to create the ‘VLAN’ ? Other Optionsexist?

Access NodeWith Ethernet Uplink

L3 Node (BRAS/Router) WithEthernet Interface

Aggregation DeviceL2 Replication Point


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Argentina 2008 35

Emulating Ethernet Links with

EoMPLS/VPWS1. EoMPLS can be used to overlay virtualL2 Ethernet Aggregation Islands over anMPLS network Allows logical separation of subscribers based onMAC-address and VLAN scaling characteristics ofEthernet Aggregation Island

2. EoMPLS can be used to emulate linksbetween Access nodes and L3 nodes

1:1 VLAN scheme

3. EoMPLS could be used to emulate linksbetween L2 Aggregation nodes and L3 nodes

N:1 VLAN scheme1:1/N:1 VLAN Scheme with redundantly attached

Access nodes

4. Leverages advantages of MPLS andEthernet bridging

Same ‘Bridging’ techniques can be deployedIP Control Plane (same as in core)

Fast Convergence optionsEoMPLS tunnel ‘never’ goes downSometimes referred to as H-VPLS (No Full Mesh ofPseudowires!)Can also transport TDM and other L1/L2 services if needed

EoMPLS PW

EoMPLS PW


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DistributionNode

SiSi

SiSi

MPLS Layer 2 Scalability

EoMPLS and VPLS VFI MAC Address Learning

1. Multipoint Layer 2 Transport – VPLS VFI requires MAC learning2. Point to Point Layer 2 Transport - EoMPLS doesn’t require MAC learning3. Exactly the same as normal Ethernet : clause 16.4 from 802.1ad allows disabling learning on

point to point VLANs

DSLAccess Node

DistributionNode

BRAS

AggregationNode

AggregationNode

AggregationNode

SiSi

Ethernet

Access Node

Access L2/3 Edge

Access Node

8 0 2 . 1 q

/ P V C

NoLearning

EoMPLS PW

802.1q/PVC

NoLearning

802.1q

NoLearning

VFI VPLS PW Mesh

Core NetworkIP / MPLS

Learning

Aggregation NetworkMPLS, Ethernet, IP

SiSi

Residential

STB

Business

Corporate

Business

Corporate

Business

Corporate

SiSi

802.1q

802.1q


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Argentina 2008 37

Scalable Learning:IEEE 802.1ad – Clause 16.4*

1. Topology converges (STP and otherprotocols)

2. Bridges “count” active ports per VLANand apply scalable learning ( )

3. Only Bridge 1d has to learn for theVLAN shown

4. Same applies for H-VPLS networks5. Static entries can still be added (e.g. as

a result of IGMP/PIM snooping)6. Hierarchically built networks (Hub and

Spoke/Ring) can usually apply thesetechniques!

C

B

A1c

1e

1g

1h

1d

1f 1b

1a

B

AC

*“In particular learning can be restricted to the ingressand egress Provider Bridge Ports of each S-VLAN thatconnects only two customer points of attachment, or tothe customer systems attached to those Ports.“

Don’t learn Learn

Scalable Learning:Don’t learn unless you have to...Bridges with only 2 active ports in a

VLAN do not have to learn for that VLAN


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Argentina 2008 38

L3PE-AGG

DSLAM

DSLAM

1. L3 allows betterload-balancingand use of thelinks across thering

2. Important for Anycast

(redundant head-ends) and local adinsertion

3. Better securitythrough antispoofingbehaviour of SSMMapping

4. Node to Nodesignalling morereliable versussignalling acrossL2 domain

PIM fast hellos/BFDVRRP (VoD)

DSLAM

DSLAM

HH--VPLSVPLS

PIMPIM

192.1.1.1

192.1.1.1

192.1.1.1

L3

L3

L3

L3N-PE

L2

L2L2

L2

L3 PIM DR

L3 PIM Non-DR(not active)

192.1.1.1

HH--VPLSVPLS

Layer 3Layer 3

L3N-PE

IGMP V2to v3 map

PIM Hello for Keep Alives Not Needed

in L3 Network

PIM FastPIM FastHellos/VRRPHellos/VRRP

Benefits of Distributed L3 Edge for Video:More Reliable, More Efficient, More Secure


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Argentina 2008 39

Using EoMPLS Across Rings for Multicast Distribution

1. Single Mcast VLAN connectsall DSLAMs for video delivery

Video flooded to all DSLAMs

2. Daisy-Chained VPLS; U-PEconnected by PW

N-PE VFI‘s not interconnected with PW

Otherwise you might need to run aSTP over the emulated LAN!

3. MPLS-FRR for PW/linkprotection—50ms restorationclaimed

Weird traffic patters across ringafter failure

No spatial re-use

4. Node failure (U-PE, N-PE)Split topology in access

R1 and R2 behave independent fromeach other (Querier for each segment):Convergence dependent on IGMPelection failure

(2-3s claimed, default = 120s!)

Problem pushed to L3 edge!

IGMP IGMP Querier Election

PW

PW

PW

PW PW PIM

Logical view

R1

R2

IGMP Querier ElectionIGMP

N-PE2

N-PE1

U-PE1

U-PE2U-PE3

U-PE4

R1

R2


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Argentina 2008 40

Logical view

R1

R2

Broadcast Video DistributionFailure Scenarios: Box Failure

1. Layer-2 subnet ispartitioned into twopieces

Violation of the fundamentalrule that an L2 segment mustbe contiguous

Spanning Tree Anyone ?

2. Usually there is unicastcontrol traffic in themulticast VLAN(e.g. RTCP, HTTP,MiddleWare traffic)

3. Unicast control trafficcould be blackholed,

unless it uses another overlay p2p topology ?

PW

PW

PW

PW PW

N-PE2

N-PE1

U-PE1

U-PE2

U-PE3

U-PE4

R1

R2


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IP for Video and IPTV Service DeliveryKey Characteristics and Benefits

1. Simplified OperationsIGMP/PIM only required, no snooping necessary in

Aggregation network; snooping contained in DSLAMSingle point of L3 termination for IPTV (no VRRP required)

2. Optimal and Scalable forwardingSSM multicast distribution model for optimal tree creationunder all conditions

Dynamic load balancing on equal cost paths(!!)Optimized ARP and IGMP tables through distributionFlexible content injection, including localized contentScales in terms of network nodes and subscribers in anytopology due to distributed L3

Allows for on-path CAC

3. ResiliencyConsistent convergence in all failure cases: Source-, Node-,Link-Failure.

Anycast-Source model for enhanced redundancy

SSM security & address-space efficiency proven architecture inmany 3Play production networks today

4. Future ReadyPossibility to add/distribute video monitoring and errorconcealment techniques easily

L3IP Mcast

L3-CoreIP Mcast

L3IP Mcast

L3-CoreIP Mcast

L3IP Mcast

L3-CoreIP Mcast

IP: 1.1.1.1

IP: 1.1.1.1

Optimal Replication

Load-balancing

Efficient Use of Access Bandwidth

Any-Cast Sources


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Argentina 2008 42

CiscoCisco

L3 VHO

L3 VSOL3 VSO

L3 VSO L3 VSO

11

22 33

44

L3 VHO

Anycast

PIM SSMFast IGP

Optimum Replication &Load-balancing

H-VPLS for Video and IPTVKey Characteristics and Issues

1. Complex OperationsComplex H-VPLS mesh

Troubleshooting challenges due to complexity of L3 / L2 /VPLS / PWE3 multi-layer solution

Different unicast versus multicast topologies!

IGMP snooping across all Aggregation network

VRRP for redundancy

2. Sub-Optimal forwardingStatic distribution tree with sub-optimal forwarding in linkfailure conditions

Per link load-balancing with 802.3ad

Scale issues with centralized ARP and IGMP tables

Restricted scalability in terms of network nodes andsubscribers

No on-path CAC possible

3. ResiliencyNo source redundancy

H-VPLS L2 ring approach requires L3 GW to recover fromnode failures, while all users are affected)

Higher security risk due to large L2 domain with snooping-based forwarding

VPLSVPLS

L3 DR /Querier

L2 VSO

L2 VSO

L2 VSO

11

22 33

44

DR/QuerierBackup

VRRP/HSRPVRRP/HSRP

L2 VSO

H-VPLS = Complex, LimitedScaling


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Argentina 2008 43

Why Is Admission ControlEssential for Video?

1. Per-service QoS for broadcast video and VODNetwork must deliver 10 -6 loss requirement to support video

QoE

Per-sub QoS for video through BRAS function not optimal(not topology aware; does not take into account multicast

replication)Per service QoS optimizes quality & operational efficiency

2. VOD connection admission controlEvery link has queue dedicated to video, with a certain amount

of planned capacity

CAC will make sure that queue is never oversubscribed bydisallowing the VOD request that would oversubscribe thequeue if allowed to flow over the network


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Cisco’s Integrated Video CAC1. Integrated Video CAC approach combines two methods

On-path RSVP-CACtopology aware, handles dynamic topology changesDSCP based implementation eliminates scale challenges experienced with IntservProven scale – tested to 50-100.000 sessions with 500 set ups per secondLayer 3 required at PE-AGG to implement path-based CAC

Off-path CAC based on Broadband Policy Manager (BPM) for DSL line congestion

2. VOD stream will be denied if business rules of either fail

3. Prioritize blocking of Free VOD vs. Pay VOD in network failure scenarios

CoreVoD Servers

MPLSPE

BRAS

PE-AGG

BPM

N-PE

RSVP-CAC

VOD Request

Deny or Admit

2222

22

22

33

44

55

11

DSLAM

66

L3

L3

L3L3

L3


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Why Is Multicast CAC NeededOversubscription on Aggregation Link to DSLAM

1. Sum of all multicastchannels > capacityplanned bandwidth

2. Need to controlmulticast replication

Per interface

Per set of groups

Per content provider

3. IOS feature: Mroutestate replicationPE

10GE

1 G E

250-500 users per DLAM

1GE

DSLAM

DSLAM

DSLAM

200-250 DLAMs per 7600

Cat7600

Simply Not Enough BWfor all the Triple Play Services

1 G E

Multicast CAC =Handling Replication Limits


46/103


Argentina 2008 46

Aggregation Network Models

DSL

Access Node

DistributionNode

BRAS

MPLS PE

SCEBusiness

Corporate

Residential

STB

AggregationNode

AggregationNode

CoreNetwork

IP / MPLS

Business

Corporate

Business

Corporate

AggregationNode

SiSi

EthernetAccess Node Aggregation Network

MPLS, Ethernet, IP

DistributionNode

Access L2/3 Edge

VoD

Content Network

TV SIP

SiSi

SiSi

SiSi

SiSi

VoD

Content Network

TV SIP

SameControlPlane !!

§ MPLS/IP Aggregation Transport MechanismsDistributed Services: IP, MPLS/Multicast VPNs

Centralised and Transparent Ethernet Services: EoMPLS, H-VPLS

§ Ethernet/IP Aggregation Transport MechanismsDistributed Services: IP, IP VRF-lite

Centralised and Transparent Ethernet Services: IEEE 802.1q, 802.1ad,802.1ah (future)


47/103


Argentina 2008 47

Cisco Carrier Ethernet DesignTransforming Consumer and Business Services

Video BroadcastVoIPVoDiFrame Cache

Application Layer

Managed Business Services(Storage, VoIP, Security)

Portal Authenticationand Billing

BroadbandPolicy Manager

Policy/Service Layer

EMS andProvisioning

Subscriber andService Database

Access

Residential

STB

EthernetPE-Agg

AggregationMobile / WiMAX

DSL

Cable

PON

Business

ETTx

Subscriber Edge

Distributed:L2 PW, L3VPNIP Multicast

Centralized:H-VPLS, L3VPN

IP Multicast

EthernetN-PE

Distribution

MSE PE

IP/MPLS Edge

BRAS

IP/MPLS Core

Core

DPI

Edge AggregationVideo/Voice – L3

HSI/Business - MPLSMSPP

CPE

CPE


48/103


Argentina 2008 48

Core

VoD Servers

BRAS

PE-AGG

High Speed Internet (HSI)§ L2 EoMPLS Backhaul§ Per sub QoS§ Central L3 and services§ PPPoE & DHCP

Video and Voice§

L3 edge distributed forefficient multicast andresiliency

§ Virtualization via MPLS VPN§ Per service QoS

N-PE

L3

Business VPN§ L2 EoMPLS backhaul§ Per sub QoS§ Central or distributed services

(L3 VPN, L2 VPN, VPLS, FW)

MSEMSEL2 VPNL2 VPNL3 VPNL3 VPN

RAN Backhaul§ L1 CES over Packet§ Per Service QoS§ Distribution of clock

HSIVoDBroadcast TV

Business VPNRAN Backhaul

BSCBSC

From Design Principles to ImplementationOne Carrier Ethernet Design


49/103


Argentina 2008 49

AggregationAccess Edge

DSL Access Node

Dist-node

BRAS

L3VPN PE

DPI

Core NetworkMPLS /IP

Agg-node

Aggregation NetworkMPLS/IP

Dist-node

Identity AddressMgmt

Portal SubscriberDatabase

Monitoring PolicyDefinition

Billing

Policy Control Plane (per subscriber)

Cable

PON

ETTx

DSL

Residential

Residential

STB

Business

Corporate

Content Farm

VOD TV SIP

BRAS

STB

Content Farm

VOD TV SIP

J

§ Support for TR-59/TR-101based business models isessential for smooth migrationto Ethernet architectures

PPP

AAA

L2TP for wholesale

§ Single point of sessionmanagement and configuration

§ Support for distributed / localpolicy definition andenforcement via ISG -> policy-manager not always required

§ Support for granular Sessioncontrol and accounting

§ Easy migration to IntelligentService Gateway (ISG)IP sessions

§ Support for TR-59/TR-101based business models isessential for smooth migrationto Ethernet architectures

PPP

AAA

L2TP for wholesale

§ Single point of sessionmanagement and configuration

§ Support for distributed / localpolicy definition andenforcement via ISG -> policy-manager not always required

§ Support for granular Sessioncontrol and accounting

§ Easy migration to IntelligentService Gateway (ISG)IP sessions

Next Generation Broadband ArchitectureWhy a *Real* BRAS Is Required?


50/103


Argentina 2008 50

Intelligent Services Gateway (ISG)

Many Services to Many ScreensMany Services to Many Screens

IdentityIdentityBillingBillingDHCPDHCPRadiusRadiusOSSOSS //BSSBSS

ISGISG

DynamicPersonalized

Services

Multi-Dimensional

Identity

IntegratedPolicyServer

OperationalIntegrationPoint

IPTV/VoD Broadband Access

Gaming

Messaging MusicVoice

Networkintelligence

enablesscalable

efficiency

Networkintelligence

enablesscalable

efficiencySubscriber

and/orapplication

driven

Subscriberand/or

applicationdriven

Enablestailoredservicesdelivery

(PPP +IP ;access

agnostic)

Enablestailoredservicesdelivery

(PPP +IP ;access

agnostic)

Speed toserviceSpeed toservice

IPNetwork


51/103


Argentina 2008 51

ISG Policy and Control Plane1. ISG provides a dynamic

interface for sessioncontrol

2. It binds the sessioncontrol plane with dataplane features andfunctions

3. Northbound DynamicSession Interface

Session logon/logoff View Service ListService logon/logoff View Session statusView System messagesFeature Change

4. ISG features controllableby RADIUS

5. Service polices includingtraffic policies, L4redirect, Subscriber ACL,Idle Timer, SessionTimer, QoS,Session/Service

Accounting, Pre-paid

Open northbound interfaces:RADIUS, CoA, XML

IP RoutingProtocols

FIB

§ Local policy execution§ External policy retrieval and

enforcement§ Authentication/Authorization/

Accounting§ Identity Management (mxID)§ Data plane provisioning

ISA/ISG

Policy and Control Plane

NetworkService

A C L

A C L

A C L

FeatureFeatureFeature

Flow

Flow

Flow

Subscriber Session

Data


52/103


Argentina 2008 52

Carrier Ethernet

Aggregation : Architectural Approaches


53/103


Argentina 2008 53

Architectural Dimensions

DistributedCentralized

Single-Edge

Multi-Edge

Clustered

Unclustered

Some services are produced ondistributed devices, whereas other

services are produced centrally

All services flow through a single device,distributed in the architecture close to the

subscriber Distributed

Separate devices for various

services. Could be service specificedge, or common per-subscriber PEPbut on multiple systems

All services flow through single device,located in a centralized PoPCentralized

Multi-EdgeSingle-EdgeServices

Geographic

x

y

z


54/103


Argentina 2008 54

CoreAccess Edge

DSL

Residential

STB

Content Farms

VOD TV SIP

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB




Billing


AggregationL2 / Simple L3


IntegratedServices

CoreNetworkMPLS /IP

Centralized Unclustered Single-Edge

Internet Voice VoD / TV Business


55/103


Argentina 2008 55

EdgeAggregationL2 / Simple L3


IntegratedServices

Core

Content Farms

VOD TV SIP

CoreNetworkMPLS /IP




Billing


Centralized Clustered Single-Edge

Access

DSL

Residential

STB

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB



56/103


Argentina 2008 56


MSE

DPI


BNG

Core

CoreNetworkMPLS /IP




Billing


Centralized Unclustered Multi-Edge

Content Farms

VOD TV SIP

Access

DSL

Residential

STB

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB



57/103


Argentina 2008 57


MSE

DPI


BNG

Core

CoreNetworkMPLS /IP




Billing


Centralized Clustered Multi-Edge

Content Farms

VOD TV SIP

Access

DSL

Residential

STB

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB



58/103


Argentina 2008 58

Access

DSL

Residential

STB

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB

CoreEdgeContent Farms

VOD TV SIP


IntegratedService

Ethernet/MPLS/IP




Billing


Distributed Unclustered Single-Edge



59/103


Argentina 2008 59

Access

DSL

Residential

STB

Mobile

ETTx

PON

MSPP

Cable

Business

Corporate

Residential

STB

CoreEdgeContent Farms

VOD TV SIP


IntegratedService

Ethernet/MPLS/IP




Billing


Distributed Unclustered Single-Edge



60/103


Argentina 2008 60

Carrier Ethernet AggregationSystem 1.5


61/103


Argentina 2008 61

Key Enhancements in CE Aggregation

1. Support of 40 Gbps / slot on main aggregation platforms

2. Support of both Centralized and Distributed BNG models

3. Increased scalability , up to 40 K EoMPLS PWs / node

4. EVC Model is available on more platforms ( C7600, C4500,Next-gen Aggregation Platform

5. Full support of E-OAM protocol suites

6. Enhanced security on EVC-based aggregation ( MAC security,storm control, L2 ACLs )

7. IPoDWDM integration for 10 GE

8. Better HA solutions with IP TE-FRR, REP, MST, mLACP, etc.


62/103


Argentina 2008 62

Carrier Ethernet Aggregation System

1. Residential SLAs Enforced at BNG. BNG can be centralized / distributed2. Business Services Centralized at MSE / distributed on Agg. Nodes3. Video Services Bypass BRAS/BNG4. Access Agnostic Ethernet UNI Models


63/103


Argentina 2008 63

L3L3

EoMPLSEoMPLS

VPLSVPLS

Local connect (P2P)Local connect (P2P)

Local Bridging (MP)Local Bridging (MP)

Flexible Ethernet UNI - EVCTechnology enabler of Carrier Ethernet Aggregation

Service instance/EFP(Ethernet F low P oint)

FlexibleVLAN

tagmatching

FlexibleVLAN

tagmatching

H-QoSper VLAN

H-QoSper VLAN

FlexibleVLANTag

rewrite

FlexibleVLANTag

rewrite

Flexible VLAN tag matching, one EFP canmatch• unique single or double VLAN tags• multiple or range or any single VLAN tag• unique outer VLAN tag with multiple orrange or any inner VLAN tags• default VLAN tag

Per VLAN egress H-QoS

Flexible VLAN tag manipulation§Pop existing 1 or 2 VLAN tags§Push 1 or 2 new VLAN tags§VLAN tag translate (1:1, 1:2, 2:2,2:1)

Flexible L2/L3 service mapping§ One or groups of EFPs can be mapped tosame L2/L3 service, with split-horizonoption between EFPs§VLANs on the same physical ports can beselectively mapped to different L2/L3service

Flexible Service Mapping


64/103


Argentina 2008 64

VLAN

poppushxlate

1:1, 2:21:2

EVC – Flexible Forwarding Model

VPLS

EoMPLS PW

EoMPLS PW

EoMPLS PW

L3

L2/L3

EFPs:VLAN(802.1q

/QinQ)

ES20, SIP-400

XL2, MP

EoMPLS

P2PLocal Connect

Bridging

Bridging

Bridging

Routing

Routing

EFPs: VLAN(802.1q/QinQ)

Support 16K P2Pxconnect service

Split horizonforwarding disabled


65/103


Argentina 2008 65

Intelligent Services GatewayTechnology enabler of Carrier Ethernet Aggregation

ISG

RADIUS Portal

L4R

Self-pro-visioning

/ Selfcare

RADIUS / AAApush/pullPer Sub/ServiceAccounting

Internet

ISGSessions

PPPoEoX

IPoE

DHCP1. Identifies sessions and serviceflows

Traffic classification for all accessarchitectures

Session and flow provides per usergranularity

2. Dynamically assigns the sessionto a configured QOS policy (MQC)via Radius

3. Establishes Virtual Route perSession

4. Provides Policing, Access Control, Accounting, via Radius Push/Pull

Authentication

Logon

Change of Authorization (Policy

Push)L4 re-direction

Accounting details

5. Limitations of SSG are removedE.g. mapping traffic to VRF, various

routing tables


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Argentina 2008 66

Access Node UNI and connectivity models:

• Non Trunk UNI, N:1 VLAN

• Trunk (Multi VC ) UNI, N:1 Service VLAN

• Trunk (Multi VC) UNI, 1:1 Internet Access VLAN

These models are the base line in TR-101 andpresent in existing Access Nodes implementations

VOD data plane: MPLS LSPs, signaled by LDP or RSVP-TE in case MPLS-TE FRR protections is required

TV date plane: IP multicast over MPLS TE link protectedEoMPLS pseudowires

Large Scale Aggregation

Intel l igent Edge

Multiservice Core

EfficientAccess

Aggregation Node

BNG

PPP, IP, MPLS MPLSMPLS / IPDSL, WiMAX, Ethernet

IP ModelVoD, IPTV, VoIP

N:1, 1:1 VLAN modelsEoMPLS Pseudowire

HSI, VoIP

Access Node

N:1 VLAN model

BNG

Distribution Node

PIM and IGP control planeIP unicast/multicast data plane

EoMPLS PW

HSI IP service subnet

3Play IP service subnet

Single PW per Aggregation Node

IP/MPLS NNI

Ethernet UNI

MPLS/IP ModelVoD, IPTV, VoIPN:1 VLAN model MPLS/IP data plane

VoD control plane: LDP, RSVP-TETV control plane: PIM, 2 nd IGP


E t h e r n e t

U N I

E t h e r n e t U N I

MPLS NNI

Retail Residential Services(Centralized Multi Edge, Clustered / Unclustered)


67/103


Argentina 2008 67

Retail Residential Services( Distributed Single Edge )

Access Node UNI and connectivity models:

• Non Trunk UNI, N:1 VLAN

• Trunk (Multi VC ) UNI, N:1 Service VLAN

• Trunk (Multi VC) UNI, 1:1 Internet Access VLAN

These models are the base line in TR-101 andpresent in existing Access Nodes implementations

VOD data plane: MPLS LSPs, signaled by LDP or RSVP-TE in case MPLS-TE FRR protections is required

TV date plane: IP multicast over MPLS TE link protectedEoMPLS pseudowires


Multiservice Core

EfficientAccess

Distributed Edge Node

MPLSMPLS / IPDSL, WiMAX, Ethernet

IP ModelVoD, IPTV, VoIP

N:1, 1:1 VLAN modelsEoMPLS Pseudowire

HSI, VoIP

Access Node

N:1 VLAN model

Distribution Node

PIM and IGP control planeIP unicast/multicast data plane

HSI IP service subnet

3Play IP service subnetIP/MPLS NNI

Ethernet UNI

MPLS/IP ModelVoD, IPTV, VoIPN:1 VLAN model MPLS/IP data plane

VoD control plane: LDP, RSVP-TETV control plane: PIM, 2 nd IGP


MPLS NNI

IP or PPPoE access. ISG is distributedon the Aggregation Nodes

ISG Sessions


68/103


Argentina 2008 68

Non Trunk UNI, N:1 VLAN

Residential Services Connectivity Overview

• Mapping all subscriber services, aggregated by the Access Node in ashared VLAN , providing to the Aggregation Network a shared VLAN with allsubscriber and services traffic

• Common bridge domain with Split horizon forwarding and Subscriber LineIdentity through PPPoE Tag Line ID or DHCP Option 82

• Default Route pointing to BNG, specific router pointing to Video ServiceRouter (through RG GUI, TR-69, DHCP Option 121)

VDSL, ADSL2+, 802.3Ethernet or Single VC

Routed DSL RG

Bridged DSL RG Emulated bridge domain

BNGInternet Service Router

• PPPoE server • Default Gateway for the Internet AccessRG/appliances subnet

• DHCP relay• IP unnumbered interface• Gateway for the specific Video

Application Subnet

Video Service Router Function

Bridge DomainFunction

Aggregation Node

802.1Q

802.1Q

N:1 VLAN

N:1 VLAN

Non Trunk UNI

Ethernet or DSL Access Node


69/103


Argentina 2008 69

Non Trunk UNI, N:1 VLANResidential Services Aggregation Model

802.1Q [10]

802.1Q [10]

Eo MP LS PW

IPoE TV, VoD

Aggregation BNGAccess Distribution

20xGE 2x10GE 2x10GE 20xGE

HSI IP/PPPoE

IPoE TV, VoD

HSI IP/PPPoE

802.1Q [100]

Bridge domain 100

Ingress

POP TAG 10 symmetric

IngressPOP TAG 10 symmetric


VFI

I GMP

s n

o o pi n

g

Gateway for VOD/IPTV

1. The Aggregation Network receives a shared VLAN with all subscriberand services traffic from the access network.

2. Port-significant VLAN ids removed on ingress - POP TAG 103. Routing AND bridging in a common N:1 VLAN4. VLAN id added on egress towards BNG


70/103


Argentina 2008 70

Trunk UNI, N:1 Service VLAN

Residential Service Connectivity Overview

Bridged DSL RG

Routed DSL RG

Emulated bridge domain


•Default Gateway for the Routed CPEs or Appliances connected in the bridged RGs• PPPoE Server • DHCP relay

• Gateways for the specificVideo/Voice Application Subnets• IP unnumbered interface• DHCP relay

Voice Service Router Function

Bridge Domain

Function

Aggregation Node

802.1Q

802.1Q


ADSL, ADSL2+, 802.3Multi VC or Trunk UNI

N:1 Service VLAN

N:1 Service VLAN

Trunk or Multi VC UNI

Ethernet/WiMAX or DSL Access Node

1. Each VC or VLAN on the UNI maps a certain service or group ofservices

2. Per service VLAN with all users for that service onto that VLAN

3. Split Horizon Forwarding, locally significant VLAN ids combined into aper service ‘Bridge Domains’ (N:1)

4. Video routed (unnumbered) in Aggregation, other transported toDistribution


71/103


Argentina 2008 71

Trunk UNI, N:1 Service VLANResidential Services Aggregation Model

802.1Q [10]

802.1Q [10]

EoMPLS PW

IPoE TV, VoD



HSI IP/PPPoE

IPoE TV, VoD

HSI IP/PPPoE

802.1Q [100]

Bridge domain 100




VFI

IPoE Voice

IPoE Voice

802.1Q [11]802.1Q [12]

802.1Q [11]

802.1Q [12]

1. Port-significant VLAN ids removed on ingress2. Some VLANs routed, other bridged3. Common Bridge Domain allows to use single MPLS PW per Aggregation Node4. VLAN id removed on egress towards BNG


72/103


Argentina 2008 72

Trunk UNI, 1:1 Internet Access VLAN

Residential Services Connectivity Overview

Routed DSL RG

QinQ/802.1ad interface


• Default Gateway for the Routed CPEs or Appliances connected in the bridged RGs• DHCP relay,• PPPoE Server

• Gateway for the specific Video Application Subnets• DHCP relay• IP unnumbered interface


VLAN Rewrite/TagFunction

Aggregation Node

802.1Q

Bridged DSL RG

ADSL, ADSL2+, 802.3Multi VC or Trunk UNI

TV/VOD VC/VLAN

HIS/Voice VC/VLAN

Eo MP LS PWN:1 VLAN

1:1 VLAN

Trunk or Multi VC UNI

1:1 VLAN

Ethernet or DSL Access Node

1. Trunk UNI, 1:1 Internet Access VLAN considers DSL Multi VCs UNIs or DSL,Ethernet 802.1q tagged UNI, one VC or VLAN being used for Internet Accesswhile the other is used for TV/VOD (and optionally for VoIP)

2. This models allows to migrate from a single/dual-play 1:1 scenario to a triple playone WITH video optimisation

3. Different Bridge Domains:N:1 VLAN for TV/VOD with Split Horizon forwarding in Access and Aggregation1:1 VLAN for Internet Access/Voice)

4. The Access Node multiplex the TV/VOD traffic in a shared VLAN andprovides to the Aggregation Network per subscriber VLANs for InternetAccess and a shared VLAN for TV/VoD.


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Argentina 2008 73

Trunk UNI, 1:1 Internet Access VLANResidential Services Aggregation Model


EoM PLS PW

802.1Q Range [11,1011]

802.1Q Range [1,1011]

802.1Q 10

802.1Q 10

Bridge Domain 1000


QinQ [[100, 200,…], any]

HSI IP/PPPoE

IPoE TV, VoD

HSI IP/PPPoE

IPoE TV, VoD

IngressPUSH TAG 100 symmetric

IngressPUSH TAG 200 symmetric

1. Internet Access 1:1 VLANs are selectively double-tagged (QinQ),added to a Bridge Domain xconnected and tunnelled across asingle PW

2. TV/VOD N:1 VLAN routed in Aggregation of the network.


74/103


Argentina 2008 74

Wholesale Services Deployments

MPLS NNI

MPLS NNI

Ethernet UNI

Ethernet UNI

Ethernet UNI


Intel l igent Edge

Multiservice Core

EfficientAccess

Agg-node

BNG

IP, MPLS MPLSMPLS / IPDSL, WiMAX, Ethernet

Access Node

BNG

Dist-node

L2 Handoff P2P and MP

3PlayL3 Handoff

EoMPLS Pseudowire

HSIL3 Handoff

EoMPLS PW

MPLS VPN

MP

L2TPv2

RFC2547bis (Unicast &Multicast) MPLS VPN

ISP peering point

N:1, 1:1 VLAN

N:1 VLAN

N:1, 1:1 VLAN

N:1 VLAN

PPPoE

PPPoE/IPoE

IPoE

EoMPLS PW

P2P

MPLS VPNIPoE

E t h e r n e t

U N I

MPLS NNIEthernet UNI


75/103


Argentina 2008 75


Intel l igent Edge

Multiservice Core

EfficientAccess


BusinessE-LINE

BusinessE-LAN

H-VPLS

BusinessL3 VPN

MPLS-VPN

Aggregation NodeAccess Node Distribution Node

EoMPLS

MPLS NNI

Inter AS, PW switch

Port, 1q, QinQ

Port, 1Q, QinQ

Port, 1Q, QInQ

Aggregation Network Service EdgeBusiness Ethernet Services Architecture

Implements servicenetwork forwarding andaccess SLA enforcement

MPLS NNI


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Argentina 2008 76

MSE Service EdgeBusiness Ethernet Services

Ethernet UNI

MSE implements servicenetwork forwarding andaccess SLA enforcement


Aggregation Network implement s a transportfunction based on EoMPLS pseudowires


Intel l igent Edge

Multiservice Core

EfficientAccess


BusinessE-LINE

BusinessE-LAN

EoMPLS PWEoMPLS PseudowireVPLS

BusinessL3 VPN

EoMPLS PWMPLS-VPN

Aggregation Node

MSE

Access Node

MSE

Distribution Node

Ethernet

QinQ

Ethernet

QinQ

Ethernet

QinQ

E t h e r n e t

U N I

E t h e r n e t U N I

Port, 1Q, QInQ

Port, 1Q, QinQ

Port, 1Q, QinQ



77/103


Argentina 2008 77

VoD CAC

Aggregation Network Diffserv RSVPInterface VLAN 10!DSLAM trunk, 250Mb allocated for VoD; stream 4Mb

ip rsvp bandwidth 250000 4000ip rsvp listener outbound replyip rsvp data-packet classification none

Aggregation NodeInterface GigabitEthernet 1/0/1.1!Aggregation Trunk, 10Gb allocated for VoD;stream 4Mb

ip rsvp bandwidth 10000000 4000ip rsvp data-packet classification none

Distribution Node

Large ScaleAggregation

VoD Serversand Middleware

EfficientAccess

Aggregation Node

IPMPLS or IPDSL, Ethernet

Access Node Distribution Node

IP Unicast & Multicast PIM SSM

1. STB HTTP GET(URL) requests VoD stream

2. RSVP PATH, VoD stream BW3. RSVP PATH, VoD stream BW

RSVP Receiver CAC

RSVP Receiver Proxy CAC 4. RSVP RESV, VoD stream BW

Bandwidth PoolBandwidth Pool

5. RSVP RESV, VoD stream BW6. HTTP 200 OK (Response to SETUP (URL))


78/103


Argentina 2008 78

TV Broadcast CAC on theAccess Node Interface


IntelligentEdge

MultiserviceCore

EfficientAccess

Aggregation Node

PPP, IP, MPLS MPLSMPLS / IPDSL, Ethernet

Access Node Distribution Node

Access UNI

Limits the number ofdifferent multicaststreams sent towardsthe DSL Access Node

Single Mroute statelimits

Limits the number ofmulticast streams senttowards DSLAM, perTV programs bundles

Multiple Mroute statelimits

Enables bandwidthCAC control per TVbundles or contentproviders

Cost factor Mroutestate limits

N:1 VLAN

IP Unicast & Multicast PIM SSM orRFC2547bis (Unicast &Multicast) MPLS VPN

• Single Mroute statelimits

• Multiple Mroute statelimits

• Cost factor Mroutestate limits

Multicast CAC Models


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Argentina 2008 79

QOS Model: DownstreamResidential Triple Play Services

Aggregation Edge

Aggregation Node Core NodeAccess Node Distribution NodeCPE

Residential

STB

R*

R*

R*

Point of Replication

Access

R*R*

BRAS Shaped/Policed Rate = DSL train rate

Per access line DiffServ/ ATM or IEEE 802.1P COS

AggregateDiffServ

BNG

AggregateDiffServ

Core Node

BNG

VoD ucastVoD ucastIPTV mcastIPTV mcast

Per sub (PPPoE) H-QOS§ Parent Shaper § Child Diffserv scheduler § Marking COSIPoE sessions can only bepoliced on aggregate

Shaping

Queuing &scheduling

Marking

Policing

Scheduling

VOD TV


80/103


Argentina 2008 80

QOS Model: DownstreamMSE L2/L3 VPN Services

Aggregation EdgeAccess

Business

Per QinQ UNI H-QOS parent shape,child Diffservscheduling, markingand policing

AggregateDiffServ

Aggregation Node MSEAccess Node Distribution NodeCPE

Access Interface

Default class basedqueuing policy, to

minimize delay and

jitter for Voice/Video

Shaping

Queuing &scheduling

Marking

Policing

Scheduling

MSE

MSE Shaped Rate = DSL train rate

Corporate


81/103


Argentina 2008 81

QOS Model: Downstream Aggregation Network L2/L3 VPN Services

Aggregation Node

Aggregation EdgeAccess

Shaped Rate = Access Line Rate

Per subscriber serviceinstance, hierarchicalOQS with parentshaper and childqueuing, policing andmarking

AggregateDiffServ

Aggregation Node Core NodeDistribution NodeCPE

Access Interface

Default class basedqueuing policy, to

minimize delay and jitter for Voice/Video

Access Node

Shaping

Queuing &scheduling

Marking

Policing

Scheduling

Business

Corporate


82/103


Argentina 2008 82

Baseline Network Availability

Mechanism1. IP Services:Fast IGP/BFD convergence

Multicast fast convergence

2. MPLS Services:Pseudowire redundancy

MPLS TE-FRR Link and Node protection with IP services, PW/VPLS PW tunnel selection

3. MPLS/IP Services use a combination of MPLS TE-FRR and fastIGP/PIM convergence


IntelligentEdge

MultiserviceCore

EfficientAccess

Aggregation NodeMSE

PPP, IP, MPLS MPLSMPLS / IPDSL, Ethernet

Access Node

BNG

Distribution Node


83/103


Argentina 2008 83

Residential Services Active/Backup Aggregation Node Redundancy

VLAN 10

VLAN 10

VLAN 10

E o M P L S P W

E o M P LS P W




PPPoE sessions


84/103


Argentina 2008 84

Residential Services Active/Active Aggregation Node Redundancy

VLAN 10

VLAN 10

E o M P L S P W

E o M P LS P W




VFI

PPPoE sessions


85/103


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Argentina 2008 86

Residential Services Active/Active Access Node Redundancy

PPPoE sessions

BNGPPPoE load sharing

VLAN 10


EoMPLS PW

VLAN 10


EoMPLS PW

Aggregation NodeVRRP/HSRP



E o M

P L S P W

X E o M P L S P W

MST/RSTNative VLAN

STPRoot


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Residential ServicesETTH/WiMAX Access Rings Redundancy

PPPoE sessions

BNGPPPoE load sharing


EoMPLS PW


Eo MP LS PW

Aggregation NodeVRRP/HSRP


2x10GE 2x10GE 2x10GE 20xGE

ETTH STP Node

ETTH STP Node

ETTH STP Node

E o M

P L S P W

VFI

VFI

E o M

P L S P W

MST/RSTNative VLAN

N:1 VLAN [10 ]

STPRoot

BlockedPORT

X


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Residential ServicesMPLS/IP TV Broadcast Service High Availability

CoreAccess

20xGE 20xGE

Aggregation Distribution

2x10GE 2x10GE

Eo MPL S PW

MPLS/IP Aggregation Networkany physical topology

EoMPLS PWs with TE-FRR link protection

PIM/SSM Routing with Fast Convergence + BFD for fast failuredetection à 300 ms node failure recovery

TR-FRR à 50 ms linkfailure recovery

interface vlan 100xconnect 10.0.0.3 101 encapsulation mplsip address 1.1.1.1 255.255.255.0


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Summary


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System Components Overview

Large ScaleAggregation Network

IntelligentServices Edge

EfficientAccess Network

Aggregation Node

MPLS/IP over DWDMDSL, PON Ethernet

Access Node Distribution NodeCPE

CustomerPremises

MSE

MPLS/IP over DWDM

Core

BNG

DSL•Res: Linksys WAG310G

•Res: SA DDR2200•Bus: ISR x800

Ethernet

• Res: Genexis

• Bus: ISR x800,• Bus: ME3400

CPEs

ADSL2+

• ISAM 7302

Ethernet• ME-3400E

• Cat 4500E• ME-X45-SUP6-E

• ME-X4624-SFP-E

PON• Wave 7

Access Nodes

Cisco 7604, 7609S• RSP720• ES40

Software• 12.2(33)SRD

Aggregation Node

Cisco 7609S

• RSP720• ES40

Software

• 12.2(33)SRD

Distribution Node

Cisco ASR-1000• RP1/RP2

• ESP10/ESP20

Cisco 12400

• PRP2

• SIP600/601

Edge Nodes

Network Access, Network Management, Service Management, OAM Subsystems

ANA 4.1 (Alice Springs + CE Assurance Manager), CNR, BAC


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EdgeEdge/AggregationAccess

Aggregation

Mobile

MPLS/IPIPTV routed

HSI/Business MPLSPW




Billing

Policy Control Plane

DSL

ETTx

PON

WIMAX

VOD TV SIP

MPLS/IP

BSC RNC

BRAS

MSEDPI

Distribution

CEoIPPSTN

IP

SBC

SBC

CEoIP

Cisco’s Carrier Ethernet ApproachBuild IP Clouds, Tunnel Where Necessary

Residential

STB

Business

Corporate

J

Residential

STB


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Consistent Resiliency


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Future Path to Distributed ServicesDrivers for More Clouds and Less Circuits

1. Reduction of CAPEX and OPEXSingle provisioning point for all services (L2/L3)Common converged infrastructureBandwidth Efficiency

2. ScaleIntegration & Distribution = Scale

3. Enhanced resiliency

Automated rerouting, no need for interboxredundancy (VRRP)Evolution to zero-loss video failover (0 ms)

4. Monitoring, control, billing of futureservices

Video 2.0: P2P legal distribution modelLocal content injection

5. However SP Org. structures will bediverse

Cisco supports circuit and cloud modelsOrganizational consolidation may lead to acceptancefor cloud network configurationTrend started in challengers and some ILECsfollowed

Centralized BRAS/PE

Distributed Residential 3Play

DistributedPointsof Scale

MPLS/IP

MPLS/IP

100-200KSubs

8-24KSubs

Single Pointof Scale


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Edge/CoreEdge/AggregationAccess

Residential Edge / Aggregation

MPLS/IPDSL

ETTx

PON

MSPP

Cable

MPLS/IP

Business Edge /Core

PE/P

PE/P

VideoISGIMS

CEoIP

Carrier EthernetFoundation forFlexibility andConvergence

Build Clouds,Not Circuits forUltimate Scaleand Efficiency

Integrate SEFIntelligencewith NetworkLayer

Distributed Residential Services EdgeTarget Architecture Overview

Mobile

Residential

STB

Business

Corporate

Residential

STB


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DWDM

G.709/FEC

7600 7600

CRS

TransponderIntegrated into 7600

TransponderIntegrated into 7600

IPoDWDM 40G with Ethernet Services: • 4x10GE and 2x10GE based on ES+40

• G.709/FEC/OAM Capability

• DFC Version – 3CXL• Supported on all existing 7600 chassis

• XFP Pluggable DWDM Optics

ROADM7600

IPoDWDM in the Aggregation NetworkIPoDWDM linecard with pluggable optics


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H-VPLS Transport

IEEE 802.1ah Service Aggregation Model• E-LAN service instance:

• EVPLAN: Local, Access Network C-VLAN• EPLAN: Local Port, Access Network S-VLAN

• Integrated Edge Node provides:• H-VPLS with 802.1ah IB-BEB MAC tunneling with each ELANmapped in a different ISID, all ELAN access EFPs in the sameC-MAC bridge• VPLS auto discovery

• The Distribution Node provides• H-VPLS, connecting the Integrated EdgeNode access pseudowires• VPLS auto discovery

VPLS PW

VFI

CoreAccess Distribution


Aggregation

EPLAN: PortClassify default

EPLAN: QinQ AccessClassify S-VLANIngress Pop S-VLAN symmetric

EVPLAN: 802.1q AccessClassify C-VLANIngress Pop C-VLAN symmetric

802.1q or QinQ

B-MACBD

802.1q or QinQ

802.1q or QinQ

C-MACBD2 ISID-2ISID-2

VFI802.1q or QinQC-MAC

BD2 ISID-1ISID-1


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802.1ah into VPLS

Residential Services ArchitectureVPLS+802.1ah Carrier Ethernet Transport

N:1 VLANIP Multicast

802.1ad NNI

Intel l igentService Edge

Multiservice Core

Efficient AccessNetwork

Aggregation Node

802.1ah over MPLS (VPLS)

Large Scale Aggregation Network

DSL, PON, Ethernet

Access Node

MPLS/IP

BNGDistribution Node Core+MSE

MPLS/IP

The Service Edge may be located in a different POP.The transport services are extended over the Core Network.

BNG

IP unicast

N:1 or 1:1 VLANs

SP: VPLS/BVLAN Instance

Access Node: ISID InstanceTrunk or

Non Trunk UNI

MVR

MVR

MVR

802.1ah over 802.1ah over HH--VPLS TransportVPLS Transport MPLS/IP Transport withMPLS/IP Transport with

IP multicast or P2MPTE or MVPN MLDPIP multicast or P2MPTE or MVPN MLDP

Core+MSE

Core+MSEBNG


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Business Services ArchitectureVPLS+802.1ah Carrier Ethernet Transport

802.1ad NNI

Intel l igentService Edge

Multiservice Core

Efficient AccessNetwork

Aggregation Node

802.1ah over MPLS (VPLS)

Large Scale Aggregation Network

DSL, PON, Ethernet

Access Node

MPLS/IP

Core + MSE

MPLS/IP

ISID for Access NodeL3VPN subscribers

MVR

MVR

MVR

HH--VPLS TransportVPLS Transport MPLS/IP TransportMPLS/IP TransportMSE

MSEMPLS VPN

MPLS VPN

ISID for ELAN service

EE--LAN VPNLAN VPN

ISID for ELINE service

802.1ah into VPLS

Distribution Node

802.1ad NNI


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Summary1. Cisco’s vision is “all services to all screens”

2. Step one on this journey is to get foundation IPTV delivery right

3. Two fundamental service categories that Cisco recommends to betreated differently

Transport defined services (TDS): internet access, business/wholesale services

Managed applications services (MAS) : video, (voice)

4. Cisco IP multicast is key technology for efficient delivery of IPTV5. To deliver on expected user experience for MAS

Need CAC + per-service QoS with 10 -6 loss for video

Need layer 3 distributed edge for efficient transport, consistent resiliency, to enable path-based CAC

6. Cisco’s IP NGN service optimized network layer can provide thissolution today

7. Future developments: Architectural convergence via IPoDWDM

Better MAC scalability via 802.1ah-based aggregation

Going into the Distributed Single-edge direction


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0

Q and A


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1

Recuerde siempre…

1. Apagar su teléfono celular mientras dure la sesión.

2. Completar su evaluación y entregarla a la asistente de sala.

3. Ser puntual en todas las actividades de entrenamiento,almuerzos y eventos sociales para lograr un desarrollo óptimo

de la agenda.

4. Completar la evaluación general incluida en su material yentregarla el miércoles 12 de Noviembre durante la tarde.


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2

MUCHAS GRACIAS !!!!!

Recuerde Completar su Formulario de Evaluación !


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Arquitecturas de Acceso Multiservicio

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