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11© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Carrier Ethernet: The Next Generation Network and
Service Delivery Technology
24 April 2008
Converged Services
Carrier Ethernet
Ralph SantitoroDirector of Carrier Ethernet Solutions
Ralph@Marcom-Services.net
Carrier Days
22© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
About Turin NetworksAbout Turin Networks
A leading global provider of Carrier Ethernet solutions
For wireline and wireless network operators
Turin’s iConnect solutions address the real-world challenges of network operators
To increase network efficiency and capacity
To facilitate migration to Carrier Ethernet networks
Solutions deployed by more than 600 customers worldwide including:
Top five wireless network operators in U.S.
11 of the top 17 broadband Internet providers
Headquartered in Petaluma, CaliforniaR&D facilities in Boulder, Dallas, Boston, and Shanghai
Sales offices throughout the world.
www.TurinNetworks.comwww.TurinNetworks.com
33© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
ContentsContents
Network Segmentation
Fundamental Ethernet service components
Ethernet services and Ethernet access to IP services
Comparison between Ethernet L2 VPNs and IP VPNs
Why Ethernet L2 VPNs, EPL and EP-LAN services?
Ethernet/IP service delivery over PDH access networks
44© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Network SegmentationNetwork Segmentation
IP Service NetworksIP Service NetworksAccess NetworksAccess Networks
• Active FiberActive Fiber• PONPON• HFC (Cable)HFC (Cable)• PDH (E1/E3)PDH (E1/E3)• DSLDSL• RAN (Wireless)RAN (Wireless)
Access NetworksAll Layer 1 technologies. Technologies well defined and deployed
IP Service Networks“Application/Service-aware” part of the network. Technologies well defined and deployed. All IP/MPLS
Metro/Aggregation NetworkWhat networking technology should be used? Carrier Ethernet
VoiceVoice
InternetInternet
IPTVIPTV VoDVoD
IP VPNIP VPN
Metro Edge / Metro Edge / Aggregation NetworkAggregation Network
?
Networking Technologies have been defined to solve specific issuesNetworking Technologies have been defined to solve specific issues
Transport/Transmission OrganizationTransport/Transmission Organization Services OrganizationServices Organization
55© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Fundamental Ethernet Service Fundamental Ethernet Service ComponentsComponents
UNI (User-to-Network Interface)Physical interface/demarcation between service provider and subscriberService start/end point
NNI (Network-to-Network Interface)Demarcation/peering point
Between service providers (E-NNI)Between service provider internal networks (I-NNI)
Ethernet Virtual Connection (EVC)Logical representation of an Ethernet serviceDefined by association of 2 or more UNIs
E-NNI I-NNIAccess/Aggregation Access/Aggregation
NetworkNetwork
E-NNI Metro Transport / Metro Transport /
Core NetworkCore Network
Access/Aggregation Access/Aggregation
NetworkNetwork
UNI UNI
EVCEVC
Ethernet service components are independent of the Access Ethernet service components are independent of the Access or Transport Network technology used to delivery the serviceor Transport Network technology used to delivery the service
66© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Example of Ethernet Service Delivery over Example of Ethernet Service Delivery over Different Access/Transport TechnologiesDifferent Access/Transport Technologies
PDH Access/Aggregation NetworkUNI1: PDH access network bonds 5 E1s for 10Mbps EoPDHE-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)
MPLS Transport Network802.1ad frames mapped to MPLS transport networkI-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)
Fiber Access NetworkUNI2: 10Mbps Ethernet over Fiber (EoF)
E-NNI
10Mbps EVC10Mbps EVC
I-NNIPDH (E1/T1) Access PDH (E1/T1) Access
Network ProviderNetwork Provider
E-NNIMPLS Transport MPLS Transport
NetworkNetwork
Fiber Access Fiber Access
NetworkNetwork
UNI2
PDH Access Network• EoPDH: 5 bonded E1sEoPDH: 5 bonded E1s
Fiber Access Network• Ethernet over Fiber (EoF)Ethernet over Fiber (EoF)
MPLS Transport Network• Ethernet over MPLSEthernet over MPLS
Ethernet Ethernet Service ProviderService Provider
UNI1
Subscriber is unaware of the various access and transport network Subscriber is unaware of the various access and transport network technologies used to deliver this 10Mbps Ethernet Servicetechnologies used to deliver this 10Mbps Ethernet Service
77© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Comparison of Ethernet Connectivity Services Comparison of Ethernet Connectivity Services and Ethernet Access to IP Servicesand Ethernet Access to IP Services
Ethernet Connectivity ServicesMulti-site E-LAN
Ethernet Private LANTransparent LAN Service (L2 VPN)VPLS (L2 VPN)
Site-to-Site E-LineEthernet Private LineEthernet Virtual Private Line (L2 VPN)
E-LineE-Line
E-LANE-LAN
InternetInternet
VoIPVoIP
E-LineE-Line
Ethernet Access to IP Services
Provide Layer 2 connectivity to IP Service Networks
Ethernet access to Internet
Ethernet access to Managed VoIP service
Ethernet Connectivity Service: Layer 2 Service End-to-EndEthernet Connectivity Service: Layer 2 Service End-to-EndEthernet Access to IP Service: Layer 2 access to IP ServiceEthernet Access to IP Service: Layer 2 access to IP Service
88© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Technical Comparison of Ethernet L2 VPN and IP Technical Comparison of Ethernet L2 VPN and IP VPN Services in Access NetworkVPN Services in Access Network
Ethernet L2 VPN Service• UNIUNI• EVC (service) identified via VLAN IDEVC (service) identified via VLAN ID• CoS identified via PCPCoS identified via PCP• Forwarding on MAC or VLAN IDForwarding on MAC or VLAN ID
IP VPN Service• PortPort• Service identified via IP addressService identified via IP address• CoS identified via DSCPCoS identified via DSCP• Forwarding on IP AddressForwarding on IP Address
Service AttributeService Attribute Ethernet ServiceEthernet Service IP ServiceIP Service
Customer Handoff Ethernet UNI Ethernet port (or PDH circuit)Service Identification VLAN ID / EVC IP AddressCoS Identification PCP (or DSCP/ToS mapped to PCP) DSCP/ToS
Packet/Frame Routing/Forwarding
MAC Address (E-LAN)VLAN ID (E-Line)
IP Address
Fault Management Link Trace, Continuity Check (L2 Ping), Loopbacks Traceroute, ICMP Ping
Performance Management
Frame Delay, Frame Delay Variation, Frame Loss Ratio, Service Availability
Packet Delay, Packet Delay Variation, Packet Loss
Service Service ProviderProvider
Fundamental difference between Ethernet and IP Services is the Fundamental difference between Ethernet and IP Services is the information used to identify, forward and process service frames information used to identify, forward and process service frames
99© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Why Ethernet L2 VPNs, EPL and EP-LAN services?Why Ethernet L2 VPNs, EPL and EP-LAN services? - - Improved SecurityImproved Security
Enterprises don’t want Carriers to know or route their IP addresses for site-to-site interconnections (VPNs)
Ethernet enables Carrier’s network to transport and switch Enterprise IP traffic without interacting with it
EPL and EP-LAN services over NG-SDH provides enhanced information security
SDH’s circuit channelization coupled with LCAS diverse routes provide a data isolation and data ‘scrambling’ effect
Ideally suited for Financial verticals such as stock exchanges, banks and government market sectors
Mitigating Carrier Ethernet Security Risks: http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf
1010© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Why Carrier Ethernet for Metro/Aggregation Why Carrier Ethernet for Metro/Aggregation Networks ?Networks ?
Metro/Aggregation Network’s FunctionalityAggregate, switch and transport traffic from access network to IP service edge networksThis capability is ideally suited for Carrier Ethernet
Carrier Ethernet provides simpler and lower cost OAM than IP/MPLS
Only need to manage 1 layer versus 3 Layers with IP/MPLSAll performance and fault management accomplished via a single technology (Ethernet)
EthernetEthernet
MPLSMPLS
EthernetEthernet
IPIPFault ManagementFault ManagementPerformance ManagementPerformance Management
OpExOpEx OpExOpEx
1 Layer to 1 Layer to managemanage
3 3 Layers Layers
to to ManageManage
1111© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Converged Ethernet/IP Service Delivery over PDH Access Networks
1212© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Delivering Ubiquitous Ethernet ServicesDelivering Ubiquitous Ethernet Services- The Access Network Challenge- The Access Network Challenge
Ethernet over Fiber (EoF) access networksThe optimal technology for delivery of Ethernet services
Unfortunately, not all Enterprise sites have fiber accessHowever, they all have access to copper PDH circuits
Fiber (Off net)
Fiber (Off net)
Fiber(On net)
Fiber(On net)
Ethernet Ethernet Service Service ProviderProvider
How does a service provider deliver Ethernet How does a service provider deliver Ethernet services to all Enterprise locations?services to all Enterprise locations?
1313© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
What is Ethernet over PDH (EoPDH)?What is Ethernet over PDH (EoPDH)?
Technology that enables delivery of Ethernet services over PDH (E1/DS1, E3/DS3) access networks
Service Bandwidth GranularityN x 2Mbps (N bonded E1s), N x 1.5Mbps (N bonded DS1s)N x 32Mbps (N bonded E3s), N x 45Mbps (N bonded DS3s)Example:
5 bonded E1s provide a 10Mbps Ethernet service3 bonded E3s provides ~100Mbps Ethernet service
Supports same service attributes as EoF servicesEthernet UNI to subscriberGranular bandwidth and QoS per serviceFault Management and Performance Management for SLAs
PDH (Plesiochronous Digital Hierarchy): Term to collectively refer to E1/E3 and DS1/DS3 copper access network circuits
EoPDH enables a common Ethernet service offering EoPDH enables a common Ethernet service offering and SLA over both copper and fiber access networksand SLA over both copper and fiber access networks
1414© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
How does EoPDH work?How does EoPDH work?
Ethernet Frames enter EoPDH CLE and encapsulated into GFPEach C-VLAN ID can be used to identify a different service (EVC)
Access network multiplexes E1s/E3s into STM-n circuitsE1s/E3s in STM-n circuits terminated on EoPDH Aggregator
GFP terminated, Ethernet frames reconstructed
EoPDH Aggregator adds S-VLAN tag (QinQ) and passes Ethernet Service Frames
to Ethernet Transport Network or IP Service NetworkPreserves enterprise subscriber’s C-VLAN ID
Copper PDH Copper PDH Access NetworkAccess Network
EoPDHCLE
Ethernet Frame at UNI
ETHETH
IP
S-VLAN Tagged Ethernet Frame (EVC)
ETHETH
IP
Enterprise Enterprise SubscriberSubscriber
Ethernet Ethernet Transport or Transport or
IP Service IP Service NetworkNetwork
Channelized STM-n
IPETHETHGFPGFP
Bonded E1s/E3s
IPETHETHGFPGFP
EoPDHEoPDHAggregatorAggregator
Copper PDH Copper PDH Access NetworkAccess Network
1515© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Ethernet L2 Services and Ethernet Access to IP Ethernet L2 Services and Ethernet Access to IP Services over E1s PDH circuits: PMOServices over E1s PDH circuits: PMO
CE
Ethernetover E1s
Ethernet handoff to customer
Customer Premise
Ethernet Ethernet
Ethernet over E1s or E1s in STM-n
L2switch
PERouter
IP Service Edge
DCS
Ethernet over E1s or E1s in STM-n
TDM
EoPDH CLE
PDH Aggregation
Router
SDHADM
Local Switching Office (POP)
SD
H
SDHADM
PDH/SDHPDH/SDHAccess NetworkAccess Network
TDM PDH circuits from Customer Premise to IP Service EdgeTDM PDH circuits from Customer Premise to IP Service Edge
1616© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
FMO Step 1 in Transport Network Evolution to FMO Step 1 in Transport Network Evolution to Carrier EthernetCarrier Ethernet
CE
Ethernetover E1s
Ethernet handoff to customer
Customer Premise
Ethernet overE1s or E1s in
STMn
Local Switching Office (POP)
SD
H
EoPDH CLE
Ethernet Ethernet
L2switch
PERouter
IP Service Edge
DCS
Ethernet over E1s or E1s in STM-n
PDH Aggregation
Router
Ethernet over SDH
Carrier E
thern
et
EoPDH aggregator terminates PDH/SDH circuits and provides Ethernet to backhaul network resulting in improved bandwidth utilizationDCS and PDH Aggregation Router eliminated at IP Service Edge since PDH circuits terminated at LSO
TDM
SDHADM
SDHADM
Ethernet
PERouter
IP Service Edge
L2switch
PDH/SDHPDH/SDHAccess NetworkAccess Network
Ethernet
EoPDHEoPDHAggregatorAggregator
1717© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Eth
erne
t
FMO Step 2 in Transport Network Evolution to FMO Step 2 in Transport Network Evolution to Carrier EthernetCarrier Ethernet
CE
Ethernetover E1s
Ethernet handoff to customer
Customer Premise
Ethernet overE1s or E1s in
STMn
Local Switching Office (POP)
EoPDH CLE C
arrier Eth
ernet
SDH ADMs / Transport replaced by Ethernet TransportShortest possible Ethernet over E1 (PDH) loopsCLE at customer premise enables converged Ethernet and IP services
TDM
Ethernet
PERouter
IP Service Edge
L2switch
SD
H
Ethernet over SDH
SDHADM
SDHADM
Ethernet
ManagedManagedCLECLE
Converged Services• Ethernet L2 VPNs
• EVPL and E-LAN• Ethernet access to Internet• Ethernet access to VoIP
PDH/SDHPDH/SDHAccess NetworkAccess Network
Local switching of locally attached subscribers reduces backhaul bandwidthLocal switching of locally attached subscribers reduces backhaul bandwidth
EoPDHEoPDHAggregatorAggregator
1818© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Ethernet over PDH BenefitsEthernet over PDH Benefits
Simplifies Enterprise subscriber’s WAN connectivity
Provides “IT friendly” Ethernet (UNI) instead of E1 TDM circuit
Simplifies Provider’s Access/Aggregation Network
Reduces backhaul bandwidth requirements
By terminating TDM PDH circuits as close to subscriber as possible
Through statistical multiplexing and local switching
EoPDH enables ubiquitous, global EoPDH enables ubiquitous, global Ethernet services for off-net subscribersEthernet services for off-net subscribers
1919© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
SummarySummary
Ethernet Services can be:Private Line Replacement (EPL)Private LAN (EP-LAN)Layer 2 Connectivity Service (E-Line or E-LAN L2 VPN)Layer 2 access connection to an IP Service (Internet, VoIP, etc.)
Carrier Ethernet is the best technology to use in the metro/aggregation network
Because this part of the network need not be “IP aware”Because it is simpler and lower cost than using IP/MPLS
Carrier Ethernet and IP/MPLS can both have their place in the network
Each plays a different role in the different parts of the network
Carrier Ethernet enables the delivery of the broadest range of services Carrier Ethernet enables the delivery of the broadest range of services while providing the lowest cost metro aggregation network infrastructurewhile providing the lowest cost metro aggregation network infrastructure
2020© Copyright 2008 Turin Networks, Inc. All Rights Reserved© Copyright 2008 Turin Networks, Inc. All Rights Reserved
Recommended ReadingRecommended Reading
Metro Ethernet Services – A Technical Overviewhttp://www.metroethernetforum.org/PDF_Documents/metro-ethernet-services.pdf
Delivering Global Ethernet Serviceshttp://www.turinnetworks.com/html/TechBrief_Global-Ethernet.pdf
Mitigating Carrier Ethernet Security Riskshttp://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf
Leveraging GMPLS to deliver end-to-end Ethernet serviceshttp://www.turinnetworks.com/html/TechBrief_Leveraging_GMPLS.pdf
“Carrier Ethernet Deployment Faces Challenges, Opportunities”http://lw.pennnet.com/display_article/308790/13/ARTCL/none/none/Carrier-Ethernet-deployment-faces-challenges,-opportunities/