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1 Ethernet Access Services Definition and Implementation.

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Presentation on theme: "1 Ethernet Access Services Definition and Implementation."— Presentation transcript:

1 1 Ethernet Access Services Definition and Implementation

2 2 Co-presented by: Ralph Santitoro Director of Carrier Ethernet Solutions Arie Goldberg Omnitron CEO and Founder MEF Board Member

3 3 Ethernet over SDH (EoS) Ethernet over PON/WDM Ethernet Service Delivery over Different Access Network Technologies EoDSL 10/100BaseT Coax Ethernet over HFC 10/100BaseT Ethernet over Fiber (EoF) Ethernet over PDH (EoPDH) 10/100BaseT Ethernet can be delivered over many different types of access network technologies 10/100BaseT Ethernet Service Provider

4 4 Fundamental Ethernet Service Components UNI (User-to-Network Interface) –Physical interface/demarcation between service provider and subscriber –Service 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 service as defined by the associate between 2 or more UNIs E-NNI I-NNI These Ethernet Service components are independent of the Access or Transport Network Technology to delivery the service Access/Aggregation Network E-NNI Metro Transport / Core Network Access/Aggregation Network UNI EVC

5 5 Example of Ethernet Service Delivery over Different Access/Transport Technologies E-NNI 10Mbps EVC I-NNI Subscriber is unaware of the various transport network technologies used to deliver this 10Mbps Ethernet Service PDH (E1/T1) Access Network Provider E-NNI MPLS Transport Network Fiber Access Network UNI 2 PDH Access Network EoPDH: N bonded E1sEoPDH: N bonded E1s Fiber Access Network Ethernet over Fiber (EoF)Ethernet over Fiber (EoF) MPLS Transport Network Ethernet over MPLSEthernet over MPLS PDH Access/Aggregation Network –UNI 1 : PDH access network bonds 5 E1s for 10Mbps EoPDH –E-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ) MPLS Transport Network –802.1ad frames mapped to MPLS transport network –I-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ) Fiber Access Network –UNI 2 : 10Mbps Ethernet over Fiber (EoF) Ethernet Service Provider UNI 1

6 6 Ethernet Services and Ethernet Access to IP Services Ethernet Services are Connectivity Services –Multi-site E-LAN Ethernet Private LAN Transparent LAN Service VPLS –Site-to-Site E-Line Ethernet Private Line Ethernet Virtual Private 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 Service: Layer 2 Service End-to-End Ethernet Access to IP Service: Layer 2 access to IP Service E-LAN E-Line Internet VoIP E-Line

7 7 Comparison of Ethernet L2 VPN and IP VPN Services in Access Network Fundamental difference between Ethernet and IP Services in the access network is the information used to identify, forward and process service frames 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 Attribute Ethernet Service IP Service Customer HandoffEthernet UNIEthernet port (or PDH circuit) Service IdentificationVLAN ID / EVCIP Address CoS IdentificationPCPDSCP/ToS Packet/Frame Routing/Forwarding MAC Address (E-LAN) VLAN ID (E-Line) IP Address Fault Management Link Trace, Continuity Check (Layer 2 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 Provider

8 8 Ethernet Access Service Attributes Ethernet Service Performance Metrics, Bandwidth Profiles, CoS, Service Performance, and Fault Management

9 9 Ethernet Service Performance Management Key Metrics 1.Frame/Packet Delay (Latency) 2.Frame/Packet Delay Variation (Jitter) 3.Frame/Packet Loss Ratio 4.Service Availability 5.Frame/Packet Goodput ITU-T has defined measurement framework/metrics for items 1-3 –IP packet-based measurements –ITU-T Y.1731 defines how to use 802.1ag to measure service performance MEF has defined measurement framework for items 1-4 –Ethernet Frame-based measurements –MEF 10.1 defines formulae for: Frame Delay (FD), FD Variation, Frame Loss Ratio, Service Availability The combination of IEEE 802.1ag, ITU-T Y.1731 and MEF 10.1 define Ethernet service performance

10 10 Ethernet Service Performance Metrics Frame Delay (FD) and Frame Delay Variation (FDV) –Measured between UNI pairs via transmission and reception of a percentile of service OAM frames over a measurement period –Example: FD: 30ms (99 th percentile over 15 minute interval) FDV: 10ms (99the percentile over 15 minute interval) –FD and FDV measurements can be One Way or Round Trip Frame Loss Ratio (FLR) –Percentage of Green (in-profile for CIR) Ingress frames received at Egress UNI over a measurement period –Example FLR: 2% ( over 15 minute interval) Service Availability –Percentile Amount of time, FLR meets its service level objectives over a measurement period –Example Availability: 99.9% (over 1 month interval)

11 11 Bandwidth Profiles (BWP) and CoS Bandwidth Profiles per EVC (service) and per CoS –CIR (Committed Information Rate) CIR assured via Bandwidth Reservation and Traffic Engineering –EIR (Excess Information Rate) EIR bandwidth is considered excess Traffic dropped at congestion points in the network –CBS/EBS (Committed/Excess Burst Size) Higher burst size results in improved performance EVC-1 CIR EIR EVC-2 CI R EIR EVC-3 CIR EIR UNI EVC 1 CoS 6 1Mbps CIR for VoIP CoS 2 6Mbps CIR for VPN data traffic 3Mbps for Internet Access EVC 2 10Mbps UNI (port) BWPs can divide bandwidth per EVC (service) over a single UNI –Multiple services over same port (UNI) –CoS markings enable the network to determine the network QoS to provide CIR defines the assured bandwidth EIR improves the networks Goodput

12 12 Ethernet Service Connectivity Fault Management IEEE 802.1ag for EVC Connectivity Fault Management –For Protection/Restoration Connectivity Check Messages (CCMs) for heartbeats –For diagnostic purposes Connectivity Check (Layer 2 Ping), Link Trace, Loopbacks CCMs initiated between: –Management Endpoints (MEPs / UNIs) –Management Intermediate Points (MIPs / NNIs) –Management Endpoints and Intermediate Points (UNI-NNI) Connectivity Fault Management provided by Carrier Ethernet network elements and NIDs

13 13 Ethernet Link Fault Management IEEE 802.3ah for Link Fault Management for (first mile) Ethernet access connection –Link Fault Detection and Remote Loopbacks Layer 1 fault management used for transport connections used to deliver Ethernet services –Ethernet over PDH –Ethernet over SDH –Ethernet over DSL –Ethernet over HFC Coax Ethernet Link Fault Management performed by Carrier Ethernet network elements and NIDs

14 14 Access Network Metro Aggregation Network Access Network IP/MPLS Core Network Metro Aggregation Network Maintenance Association (MA) MEP#1 MEP #2 MIP Ethernet Service Continuity Check MEP #1 No CCMs received from MEP #2 within 30ms (3 x 10ms) MEP #2 Report on CC fault if no CCMs are received from MEP #1 for 30ms MEP #1 Send CCMs with RDI flag set MEP #2 Remote alarm detected by received RDI Report alarm to management system MEP #2 Initiate protection switchover MEP #1 CCMs sent every 10ms on working/protect paths Check for CCMs received from MEP #2 on working/protect paths MIP UNI MEP #2 CCMs sent every 10ms Check for CCMs received from MEP #1 MEP #1 Report CC fault to management system Ethernet continuity check is analogous to IPs Ping but does much more

15 15 Ethernet Link Trace Access Network Metro Aggregation Network Access Network IP/MPLS Core Network Metro Aggregation Network MEP MIP Link trace Reply UNI Ethernet Link Trace is analogous to IPs Traceroute

16 16 Some Benefits of Ethernet L2 VPN versus IP VPN L2 VPN Service Benefit Enterprise Benefits Service Provider Benefits No IP awareness required –Especially important with IPv6 applications No service provider coordination of IP addresses No concerns of service providers IPv6 capabilities No need for service provider to have IPv6- capable routers Fault management –Ethernet OAM versus IP, MPLS and Ethernet OAM Simpler OAM (lower OpEx) by managing a single network layer –Perform just Ethernet OAM instead of Ethernet OAM + MPLS (OAM) + IP OAM for fault management Multi-site connectivity Simpler to add new location to an E-LAN service (auto learning) In many cases, simpler to deploy L2 multipoint services

17 17 Summary Ethernet Service are agnostic of the Access or Transport Network Technology –Facilitates a common service portfolio for all markets Ethernet Service can be: –A Layer 2 Connectivity Service (E-Line or E-LAN L2 VPN) –A Layer 1 Private Line Replacement (EPL) –A Layer 2 access connection to an IP Service Ethernet Access to Internet Managed IP VPN or VoIP service

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