arquitecturas de acceso multiservicio
TRANSCRIPT
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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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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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The Evolution ofMultimedia Services
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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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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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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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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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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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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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DSL Forum’sTR-101
An Architecture for Ethernet Aggregation of DSL Access Nodes
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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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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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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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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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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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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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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
Aggregation Node:Carrier Ethernet Switch/
Service Router with
Aggregation function
BNG/BRAS extremely important for PPPServices/migration/legacy ATM support
IP/MPLS Core
Business
Corporate
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Video BNG
Aggregation Node:Carrier Ethernet Switch/
Service Router withAggregation function
Aggregation Node:Carrier Ethernet Switch/
Service Router withAggregation function
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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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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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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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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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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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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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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Aggregation
Network ArchitectureTransport Options
IP, Ethernet Bridging, MPLS, or … ?
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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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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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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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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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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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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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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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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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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
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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)
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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
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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
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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?
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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
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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
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Carrier Ethernet
Aggregation : Architectural Approaches
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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
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CoreAccess Edge
DSL
Residential
STB
Content Farms
VOD TV SIP
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
AggregationL2 / Simple L3
Aggregation NetworkMPLS/IP
IntegratedServices
CoreNetworkMPLS /IP
Centralized Unclustered Single-Edge
Internet Voice VoD / TV Business
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EdgeAggregationL2 / Simple L3
Aggregation NetworkMPLS/IP
IntegratedServices
Core
Content Farms
VOD TV SIP
CoreNetworkMPLS /IP
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
Centralized Clustered Single-Edge
Access
DSL
Residential
STB
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
Internet Voice VoD / TV Business
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EdgeAggregationL2 / Simple L3
MSE
DPI
Aggregation NetworkMPLS/IP
BNG
Core
CoreNetworkMPLS /IP
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
Centralized Unclustered Multi-Edge
Content Farms
VOD TV SIP
Access
DSL
Residential
STB
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
Internet Voice VoD / TV Business
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EdgeAggregationL2 / Simple L3
MSE
DPI
Aggregation NetworkMPLS/IP
BNG
Core
CoreNetworkMPLS /IP
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
Centralized Clustered Multi-Edge
Content Farms
VOD TV SIP
Access
DSL
Residential
STB
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
Internet Voice VoD / TV Business
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Access
DSL
Residential
STB
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
CoreEdgeContent Farms
VOD TV SIP
Core NetworkMPLS /IP
IntegratedService
Ethernet/MPLS/IP
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
Distributed Unclustered Single-Edge
Internet Voice VoD / TV Business
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Access
DSL
Residential
STB
Mobile
ETTx
PON
MSPP
Cable
Business
Corporate
Residential
STB
CoreEdgeContent Farms
VOD TV SIP
Core NetworkMPLS /IP
IntegratedService
Ethernet/MPLS/IP
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
Billing
Policy Control Plane (per subscriber)
Distributed Unclustered Single-Edge
Internet Voice VoD / TV Business
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Carrier Ethernet AggregationSystem 1.5
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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.
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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
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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
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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
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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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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
3Play IP service subnet
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)
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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
Large Scale Aggregation
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
3Play IP service subnet
MPLS NNI
IP or PPPoE access. ISG is distributedon the Aggregation Nodes
ISG Sessions
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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
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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
IngressPOP TAG 100 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
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Trunk UNI, N:1 Service VLAN
Residential Service Connectivity Overview
Bridged DSL RG
Routed DSL RG
Emulated bridge domain
BNGInternet Service Router
•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
Video Service Router Function
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
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Trunk UNI, N:1 Service VLANResidential Services Aggregation Model
802.1Q [10]
802.1Q [10]
EoMPLS 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
IngressPOP TAG 10 symmetric
IngressPOP TAG 10 symmetric
IngressPOP TAG 100 symmetric
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
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Trunk UNI, 1:1 Internet Access VLAN
Residential Services Connectivity Overview
Routed DSL RG
QinQ/802.1ad interface
BNGInternet Service Router
• 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
Video Service Router Function
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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Trunk UNI, 1:1 Internet Access VLANResidential Services Aggregation Model
Aggregation BNGAccess Distribution
EoM PLS PW
802.1Q Range [11,1011]
802.1Q Range [1,1011]
802.1Q 10
802.1Q 10
Bridge Domain 1000
20xGE 2x10GE 2x10GE 20xGE
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.
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Wholesale Services Deployments
MPLS NNI
MPLS NNI
Ethernet UNI
Ethernet UNI
Ethernet UNI
Large Scale Aggregation
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
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Large Scale Aggregation
Intel l igent Edge
Multiservice Core
EfficientAccess
IP, MPLS MPLSMPLS / IPDSL, WiMAX, Ethernet
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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MSE Service EdgeBusiness Ethernet Services
Ethernet UNI
MSE implements servicenetwork forwarding andaccess SLA enforcement
MSE implements servicenetwork forwarding andaccess SLA enforcement
Aggregation Network implement s a transportfunction based on EoMPLS pseudowires
Large Scale Aggregation
Intel l igent Edge
Multiservice Core
EfficientAccess
IP, MPLS MPLSMPLS / IPDSL, WiMAX, Ethernet
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
MSE implements servicenetwork forwarding andaccess SLA enforcement
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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))
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TV Broadcast CAC on theAccess Node Interface
Large ScaleAggregation
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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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
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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
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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
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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
Large ScaleAggregation
IntelligentEdge
MultiserviceCore
EfficientAccess
Aggregation NodeMSE
PPP, IP, MPLS MPLSMPLS / IPDSL, Ethernet
Access Node
BNG
Distribution Node
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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
Aggregation BNGAccess Distribution
20xGE 2x10GE 2x10GE 20xGE
Gateway for VOD/IPTV
PPPoE sessions
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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
Aggregation BNGAccess Distribution
20xGE 2x10GE 2x10GE 20xGE
Gateway for VOD/IPTV
VFI
PPPoE sessions
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Residential Services Active/Active Access Node Redundancy
PPPoE sessions
BNGPPPoE load sharing
VLAN 10
Gateway for VOD/IPTV
EoMPLS PW
VLAN 10
Gateway for VOD/IPTV
EoMPLS PW
Aggregation NodeVRRP/HSRP
Aggregation BNGAccess Distribution
20xGE 2x10GE 2x10GE 20xGE
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
Gateway for VOD/IPTV
EoMPLS PW
Gateway for VOD/IPTV
Eo MP LS PW
Aggregation NodeVRRP/HSRP
Aggregation BNGAccess Distribution
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
Identity AddressMgmt
Portal SubscriberDatabase
Monitoring PolicyDefinition
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
20xGE 2x10GE 2x10GE 20xGE
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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