Carrier Ethernet - APRICOT
Carrier EthernetOperations, Administration & MaintenanceSantanu Dasgupta1
Acknowledgement Jose Liste Sudarshan Pathalam2
Agenda OAM Overview Ethernet OAM – Protocol OverviewIEEE 802.3ah – Link OAM, also known as EFMIEEE 802.3ag – Connectivity Fault Management (CFM)ITU Y.1731 – Fault & Performance ManagementMEF E-LMI – Configuration Management Ethernet Service Activation Testing OAM Interworking Sample Fault Management Scenarios Ethernet OAM Deployment Use Cases Summary3
Operations, Administration & Maintenance F – Fault ManagementFCAPS C – Configuration Management A – Accounting P – Performance Management S – Security ManagementOAM Protocols and Mechanisms helps operator toachieve some of the FCAPS functionalityOAM capability is one of the key differentiator tomake a SP network truly “Carrier Grade”4
Problem ScopeA few possible scenariosExcessiveEncoding ErrorsUni-directionalLinkAccessExcessiveFCS E ASP NetworkCoreN-PE 1D-LDP sessionfailureVC failureUnexpectedEndpointNativeEthernetC-VLANto EVCmismatchCEU-PE DN-PE link failureU-PE BN-PE 4N-PE 2U-PEdevice failureCEACEthernet UNIfailureEthernet UNIUNIport failureMPLS U-PE CSpeedmismatchPhysicallink failurePW failureVFIfailureP-RouterfailureVLAN to VFIxconnect failurePhysicallink failure5
OAM: The Concept Operations, Administration, Maintenance & Provisioning: fault indication performance monitoring security management diagnostic functions configuration & service provisioning OAM covers both Nß à S and Wß à E interfacesN ß à SManagement Plane(NMS / EMS)Network Plane(Elements)W ß à E6
Scope of Ethernet OAM Operations, Administration, Maintenance & Provisioning: fault indication performance monitoring security management diagnostic functions configuration & service provisioning OAM covers both Nß à S and Wß à E interfacesN ß à SManagement Plane(NMS / EMS)Primary Focus of Ethernet OAM protocols is on W ß à E interactions(across NEs)Network Plane(NEs)W ß à E7
Focus Areas of Ethernet EEVPLCoreEP- ‐LANEVP- ‐LANEdgeCoreEP- ‐TREEAggregationN-PEEVP- ‐TREEAccessPE-AGGACEPLU-PEACEVPLCE Services &Network InfrastructureFault ManagementFault DetectionFault NotificationFault VerificationFault IsolationFault RecoveryConfig ManagementPerformance ManagementService ProvisioningFrame Loss MeasurementDelay MeasurementDelay Variation MeasurementAvailability Measurement8
Ethernet OAMBuilding agementLIMIMELEConfigurationManagement802AIP ManagementConfigurationManagement IEEE 802.1ag: Connectivity Fault Management (CFM)IEEE 802.3ah: Ethernet Link OAM (EFM OAM)ITU-T Y.1731: OAM functions & mechanisms for Ethernet based networksMEF E-LMI: Ethernet Local Management InterfaceIP SLA’s: Performance Management using CFM and Y.1731 mechanisms9
Carrier Ethernet OAMProtocol PositioningCustomerConnectivityCoreFault nCustomerY.1731 etMPLS/IPLink sidentialUNI E-LMI – User to Network Interface (UNI) Link OAM – Any point-point 802.3 link CFM, Y.1731 PM – End-to-End UNI to UNI MPLS OAM – within MPLS cloud10
IEEE 802.3ah(Clause 57)Link OAM11
Link OAM (IEEE 802.3ah, Clause 57) Provides mechanisms usefulfor “monitoring link operation”,such as:Link MonitoringRemote Failure IndicationRemote Loopback Control Defines an optional OAM sublayer Intended for single point-to-pointIEEE 802.3 linksProtocol”1 Uses “Slowframescalled OAMPDUs which arenever forwarded by MAC clients Standardized: IEEE 802.3ah,clause 57 (now in IEEE802.3-2005)OSI A/CDLayersHigher LayersLLCOAM (Optional)NetworkMACData LinkPhysical LayerPhysical(1) No more than 10 frames transmitted in any one-second period12
IEEE 802.3ahKey Functions OAM DiscoveryDiscover OAM support and capabilities per device Link MonitoringBasic error definitions for Ethernet so entities can detect failed anddegraded connections Fault SignalingMechanisms for one entity to signal another that it has detected an error Remote MIB Variable RetrievalAbility to read one or more MIB variables from the remote DTE Remote LoopbackUsed to troubleshoot networks, allows one station to put the otherstation into a state whereby all inbound traffic is immediately reflectedback onto the link13
IEEE 802.3ahOAM Events Set of events that may impact link operation Critical Link eventsLink fault—fault in the Rx direction of local DTEDying gasp—unrecoverable local failure conditionCritical event—unspecified critical event Link eventsErrored Symbol Period EventErrored Frame EventErrored Frame Period EventErrored Frame Seconds Summary Event14
IEEE 802.3ahRemote Loopback Fault localization and intrusive link performance testing Loopback Control OAMPDU is used to control a remoteOAM client Traffic sent from master loopback port is loopback byslave port, except Pause and OAMPDUSlave drops trafficfrom LLC onlooped interfacesOAMMACPHYMaster OAMXReturned trafficdropped at Masterto prevent MACmovesSlave loops serviceframes withoutswapping MACaddressesXOAMMACPHYSlave OAM15
IEEE 802.1ag: Connectivity FaultManagement (CFM)16
CFM Overview Family of protocols that provides capabilities todetect, verify, isolate and report end-to-end Ethernetconnectivity faults Employs regular Ethernet frames that travel in-bandwith the customer trafficDevices that cannot interpret CFM Messages forwardthem as normal data frames CFM frames are distinguishable by Ether-Type(0x8902) and dMAC address (for multicast messages) Standardized by IEEE in 2007IEEE std. 802.1ag-2007 2009 Cisco Systems, Inc. All rights reserved.Cisco Public17
CFM Overview (Cont.)Key CFM Mechanisms Nested Maintenance Domains (MDs) that break upthe responsibilities for network administration of agiven end-to-end service Maintenance Associations (MAs) that monitor serviceinstances under a given MD Maintenance Points (MPs) that generate and respondto CFM PDUs Protocols (Continuity Check, Loopback and Linktrace)used for Fault Management activities 2009 Cisco Systems, Inc. All rights reserved.Cisco Public18
CFM ConceptsMaintenance Domain (MD)CECEOperator AOperator BService ProviderCustomer Defined by Operational/Contractual Boundariese.g. Customer / Service Provider / Operator MD may nest and touch, but never intersect Up to eight levels of “nesting”: MD Level (0.7)The higher the level, the broader its reach MD Name Format: null, MAC address, DNS or string-based 2009 Cisco Systems, Inc. All rights reserved.Cisco Public19
CFM ConceptsMaintenance Association (MA)CEOperator AOperator BCE Monitors connectivity of a particular service instance in a given MD(e.g. one service traversing four MDs four MAs) Defined by a set of Maintenance End Points (MEP) at the edge of adomain Identified by MAID “Short MA” Name MD Name Short MA Name Format: Vlan-ID, VPN-ID, integer or string-based 2009 Cisco Systems, Inc. All rights reserved.Cisco Public20
CFM ConceptsMaintenance Point (MP)—MEPCEOperator AOperator BCEMEPMEPMEPMEPMEPMEP MEPMEP Maintenance Association End Point (MEP) Define the boundaries of a MD Support the detection of connectivity failures between any pair of MEPs inan MA Associated per MA and identified by a MEPID (1-8191) Can initiate and respond to CFM PDUs 2009 Cisco Systems, Inc. All rights reserved.Cisco Public21
CFM ConceptsMaintenance Point (MP)—MIPCEMEPOperator AOperator BMIPMIPMEPMEPCEMIP MIPMIP MIPMIPMEP MEPMIPMEPMEPMIP MIP MIP MIPMIPMEPMIP Maintenance Domain Intermediate Point (MIP) Support the discovery of paths among MEPs and location of faults alongthose paths Can be associated per MD and VLAN/EVC (manuallyor automatically created) Can add, check and respond to received CFM PDUs 2009 Cisco Systems, Inc. All rights reserved.Cisco Public22
CFM ConceptsUP MEP CFM PDUs generated by theMEP are sent towards theBridge’s Relay Function andnot via the wire connectedto the port where the MEPis configuredBridge CFM PDUs to be responded bythe MEP are expected to arrivevia the Bridge’s Relay Function Applicable to switchesRelayEntityPort APort BCFM PDUs 2009 Cisco Systems, Inc. All rights reserved.Cisco Public23
CFM ConceptsDOWN MEP CFM PDUs generated by theMEP are sent via the wireconnected to the port wherethe MEP is configuredBridge / Router CFM PDUs to be respondedby the MEP are expected toarrive via the wire connectedto the port where the MEPis configured Port MEP—special DownMEP at level zero (0) usedto detect faults at the linklevel (rather than service)RelayEntityPort APort BCFM PDUs Applicable to routersand switches 2009 Cisco Systems, Inc. All rights reserved.Cisco Public24
CFM ConceptsMAs and UP/DOWN MEPsApplicability of UP/DOWNMEPs in switches: DOWN MEPs are typically usedfor MAs spanning a single linkDOWN MEP to UP MEPBridge 1BridgePort UP MEPs are commonly used forMAs with a wider reach (e.g. endto-end, beyond a single link)RelayEntityBridge d areaUP MEP to UP MEPBridge 1BridgePortRelayEntityBridge d area 2009 Cisco Systems, Inc. All rights reserved.Cisco Public25
CFM ProtocolsThere are three (3) protocols defined by CFM Continuity Check ProtocolFault DetectionFault NotificationFault Recovery Loopback ProtocolFault Verification Linktrace ProtocolPath Discovery and Fault Isolation 2009 Cisco Systems, Inc. All rights reserved.Cisco Public26
CFM ProtocolsContinuity Check ProtocolCEOperator AOperator BCatalogueMEPCatalogue andTerminateCatalogueMIP MIP12CEMEP3XContinuity Check Message(CCM) Used for Fault Detection, Notification and Recovery Per-Maintenance Association multicast “heart-beat” messagesTransmitted at a configurable periodic interval by MEPs(3.3ms, 10ms, 100ms, 1s, 10s, 1min, 10min)Uni-directional (no response required)Carries status of port on which MEP is configured Catalogued by MIPs at the same MD-Level, terminated by remote MEPsin the same MA 2009 Cisco Systems, Inc. All rights reserved.Cisco Public27
CFM ProtocolsLoopback ProtocolCEOperator AOperator BSCEDMEPMIP MIPMEP1 1. Loopback Message(LBM)2 2. Loopback Reply (LBR)12 Used for Fault Verification—Ethernet Ping MEP can transmit a unicast LBM to a MEP or MIP in the same MA MEP can also transmit a multicast LBM (defined by ITU-T Y.1731),where only MEPs in the same MA respond Receiving MP responds by transforming the LBM into a unicastLBR sent back to the originating MEP 2009 Cisco Systems, Inc. All rights reserved.Cisco Public28
CFM ProtocolsLinktrace ProtocolCEOperator AS2MEP1Operator B64MIP MIP3CEDMEP51, 3, 5X Linktrace Message (LTM)Y 2, 4, 6Linktrace Reply (LTR) Used for Path Discovery and Fault Isolation—Ethernet Traceroute MEP can transmit a multicast message (LTM) in order to discoverthe MPs and path to a MIP or MEP in the same MA Each MIP along the path and the terminating MP return a unicastLTR to originating MEP 2009 Cisco Systems, Inc. All rights reserved.Cisco Public29
ITU-T Y.1731 Overview 2009 Cisco Systems, Inc. All rights reserved.Cisco Public30
ITU-T Y.1731 Overview ITU-T recommendation that provides mechanisms foruser-plane OAM functionality in Ethernet networks. Itcovers:EthernetService OAMFault Management mechanismsMPLSService OAMPerformance Management mechanismsMPLS-TPTunnel OAMIP / MPLSTunnel OAM Standardized by ITU-T SG 13 in May 2006Latest published version dated Feb. 2008 after IEEE 802.1agstandardization Frame formats (Multicast Address, Ethertype, andcommon OAM PDU fields) and base functionality areagreed upon across IEEE 802.1ag and Y.1731 2009 Cisco Systems, Inc. All rights reserved.Cisco Public31
ITU-T Y.1731 Overview OAM Functions for Fault ManagementEthernet Continuity Check (ETH-CC) (Y.1731 adds unicast CCM)Covered byIEEE 802.1agEthernet Loopback (ETH-LB) (Y.1731 adds multicast LBM)Ethernet Linktrace (ETH-LT)Ethernet Remote Defect Indication (ETH-RDI)Ethernet Alarm Indication Signal (ETH-AIS)Ethernet Locked Signal (ETH-LCK)In addition: ETH-TEST, ETH-APS, ETH-MCC, ETH-EXP, ETH-VSP OAM Functions for Performance ManagementFrame Delay Measurement (ETH-DM)Frame Loss Measurement (ETH-LM)Frame Loss Measurement (ETH-SLM) 2009 Cisco Systems, Inc. All rights reserved.Cisco Public32
ETH-AIS – Alarm Indication SignalLOC Alarm Suppression Without AIS, a MEP would report Loss of Continuity (LOC) for each of itsremote MEPs upon timer expiration With AIS, if a MEP receives AIS from the network, it suppresses LOCalarms from peer MEPsLOC 1LOC 3LOC 4Network outage2mpid 1XLOC 2LOC 3LOC 4AIS defectLOC 1LOC 2LOC 42AISmpid 1XAIS3LOC 1LOC 2LOC 3AIS defectWITH AISTimer-drivenLOC notificationEvent-drivenAIS notificationCisco Public34WITHOUT AIS 2009 Cisco Systems, Inc. All rights reserved.AIS defectAISAIS defect4AIS33
Alarm Indication SignalTransport Path Failure propagationNMSAIS DefectNorthboundSyslogsCustomerEquipmentOperator ABridgesLinkFailureOperator EP(2)MIP(2)MEP(3)MIP(3)SMEP/link-statusAIS 2009 Cisco Systems, Inc. All rights reserved.Cisco Public34
Y.1731 – Performance Management Functions Frame Loss Ratio – percentage (%) of service framesnot delivered / Total number of service frames deliveredin T time interval Frame Delay – round-trip/one-way delay for a serviceframe Frame Delay Variation – Variation in frame delaybetween a pair of service frame 2009 Cisco Systems, Inc. All rights reserved.Cisco Public35
Ethernet Performance ManagementITU-T Y.1731 – Technology OverviewEthernet Delay MeasurementEthernet Loss tic -LMDual-EndedETH-LMSingle-EndedETH-SLM Two-Way delaymeasurements Also One-Way delaywhen synchronized Unidirectional frameloss measurements Applicable to P2Pservices only Unidirectional frameloss measurements Applicable to P2Pservices only Unidirectional frameloss measurements Applicable to P2Pand MP services DMM / DMR PDUs Synthetic traffic withtwo (2) mandatoryand two (2) optionaltimestamps LMM / LMR PDUs On-demand operation Based on actualService Frame Loss Exchange of serviceframe counters CCM PDUs Proactive operation Based on actualService Frame Loss Exchange of serviceframe counters SLM / SLR PDUs Based on statisticalsampling Exchange ofsynthetic framecountersScope One-Way delaymeasurementsSpecifics 1DM PDU Synthetic traffic withtwo (2) timestamps Need for Time-of-Daysynchronization 2009 Cisco Systems, Inc. All rights reserved.Cisco Public36
Y.1731 – Frame Delay Measurement Frame Delay calculatedbased on timestampsapplied to synthetic traffic Applicable to point-topoint and multipointservices Two (2) mechanismsdefinedOne-Way ETH-DMOne-Way ETH-DMPerformance Metrics One-Way FD/FDV Time-of-Day (ToD)synchronization requiredfor OW FDTwo-Way ETH-DM 2009 Cisco Systems, Inc. All rights reserved.Ethernet Delay MeasurementETH-DMCisco PublicTwo-Way ETH-DMPerformance Metrics Two-Way FD/FDV One-Way FD/FDV whensynchronized37
ITU-T Y.1731 OverviewOne-Way ETH-DMCustomerEquipmentService ProviderCustomerEquipmentNEs must be synchronized (ToD) for one-way ampf1DMOne-Way DelayOne-Way Delay VariationDelay RxTimeStampf – TxTimeStampfDelay Var.[tc] Delay[tc] – Delay[tp] 2009 Cisco Systems, Inc. All rights reserved.Cisco Publictp – Time Previoustc – Time Current1DM – One-way Delay Measurement38
ITU-T Y.1731 OverviewTwo-Way ETH-DMCustomerEquipmentService ProviderCustomerEquipmentNEs may be synchronized (ToD) for one-way mpfTxTimeStampbRxTimeStampbMEPTxTimeStampf DRxTimeStampf M0M0DMMDMROptionalTimestampsTxTimeStampf DRxTimeStampf MTxTimeStampbR0Two-Way DelayOne-Way Delay (Forward)One-Way Delay (Backward)(RxTimeStampb – TxTimeStampf) –(TxTimeStampb – RxTimeStampf)RxTimeStampf – TxTimeStampfRxTimeStampb – TxTimeStampb 2009 Cisco Systems, Inc. All rights reserved.Cisco PublicDMM – Delay Measurement MessageDMR – Delay Measurement Reply 39
Y.1731 – Frame Loss Measurement Frame Loss calculated based onactual in-profile service counters Applicable to point-to-pointservices only (with ETH-LM) Near-End Frame LossmeasurementLoss associated with Ingress Data FrameEthernet Loss M Far-End Frame LossmeasurementLoss associated with Egress Data Frame Per-CoS counters maintained perMEPTxFCl – in-profile data frames transmittedtowards the peer MEPRxFCl – in-profile data frames receivedfrom the peer MEP 2009 Cisco Systems, Inc. All rights reserved.Cisco PublicPerformance Metrics Unidirectional Frame Loss Frame Loss Ratio Availability40
ITU-T Y.1731 OverviewSingle-Ended (On-demand) ETH-LMCustomerEquipmentService ProviderCustomerEquipmentService FramesMEPPer-CoSService FramecountersTxFClRxFClTxFCfLMM00TxFCfLMR RxFCfTxFCbMEPLMMtpLMRLMMtcTxFCfLMM00TxFCf LMRRxFCfTxFCbPer-CoSService FramecountersRxFClTxFClLMRFrame Loss (Far-end)Frame Loss (Near-end)(TxFCf[tc] – TxFCf[tp]) – (RxFCf[tc] – RxFCf[tp])(TxFCb[tc] – TxFCb[tp]) – (RxFCl[tc] – RxFCl[tp]) 2009 Cisco Systems, Inc. All rights reserved.Cisco Publictp – Time Previoustc – Time CurrentLMM – Loss Measurement MessageLMR – Loss Measurement Reply41
Synthetic Loss Measurement (ETH-SLM) Y.1731 ETH-LM cannot be usedfor frame loss in multipoint EVCs A new protocol (SLM) based onsynthetic framesStatistical Frame LossCovers P2P or MP EVCsImplementable by ALL platforms ITU agreed (June 2010) toallocate code points for newPDUs (SLM / SLR)SLMSLRAB ETH-SLM included ITU-T G.8013 / Y.1731 (07/2011)CSLM – Synthetic Loss MessageSLR – Synthetic Loss Reply 2009 Cisco Systems, Inc. All rights reserved.Cisco Public42
ITU-T Y.1731 OverviewSingle-Ended ETH-SLMCustomerEquipmentService ProviderCustomerEquipmentSynthetic FramesMEPPer-Test IDSynthetic MtpSLRSLMtcSLRTxFCf SLM0TxFCf SLRTxFCbPer-Test IDSynthetic FramecountersRxFClTxFClRxFCl TxFClat ResponderFrame Loss (Far-end)Frame Loss (Near-end)(TxFCf[tc] – TxFCf[tp]) – (TxFCb[tc] – TxFCb[tp])(TxFCb[tc] – TxFCb[tp]) – (RxFCl[tc] – RxFCl[tp]) 2009 Cisco Systems, Inc. All rights reserved.tp – Time Previous – Start of Measurement Periodtc – PublicTime Current – End of Measurement PeriodCiscoSLM – Synthetic Loss MessageSLR – Synthetic Loss Reply43
Ethernet LocalManagementInterface (E-LMI)Overview 2009 Cisco Systems, Inc. All rights reserved.Cisco Public44
Ethernet LMIOverview Provides protocol and mechanismsused for:Notification of EVC addition, deletion orstatus (Active, Not Active, Partially Active)to CECommunication of UNI and EVC attributesto CE (e.g. CE-VLAN to EVC map)CE auto-configurationNotification of Remote UNI count, name andstatus to CE Asymmetric protocol based onFrame Relay LMI, mainly applicableto the UNI (UNI-C and UNI-N)User Network I Specification completed by ds/MEF16.doc 2009 Cisco Systems, Inc. All rights reserved.Cisco Public45
EthernetService Activation 2011 Cisco and/or its affiliates. All rights reserved.46
Service Activation Testing (SAT) Issuance of ‘BirthCertificate’TrafficGeneration/Reception Validation of ServiceConfigurationControlPlaneSignaling Validation of SLAThroughputTest MethodologyLatencyData PlaneLoopbackLossJitter 2009 Cisco Systems, Inc. All rights reserved.Cisco Public47
SAT ConceptsBi-directional Test OperationTGEthernet Data-Plane LoopbackTest TrafficEVCTest InitiatorResponderUni-directional Test OperationTGStart Reply / RequestTest TrafficTest Initiator 2009 Cisco Systems, Inc. All rights reserved.EVCStop Reply / RequestRLResponderTG Traffic Generation functionHW-accelarated (Platform-Dependent)RL Responder LogicCisco Public48
MEF ProjectsProject NameService ActivationTesting projectHighlights Defines set of tests needed to run before handingoff a service to subscriber Leverages ITU-T Y.1564StatusApproved ProjectEditor: CableLabsTargeting completion in Q2, 2013 Defines the test PDUs that can be used to performthe tests defined by the SAT projectSAT PDU projectLatching loopbackprojectApproved ProjectEditor: Verizon Defines control protocol to be used for unidirectional Targeting completion in Q4, 2013tests - to set up the collector and/or responder at theremote end. Defines control protocol to be used for bidirectionaltests - to put remote device into latching loopback 2009 Cisco Systems, Inc. All rights reserved.Cisco PublicApproved ProjectEditor: AdtranTargeting completion in Q1, 201449
ITU-T Y.1564 RFC2544 methodology shortcomings (asstated by Y.1564)Not Ethernet service awareTests run as a single flow at a timeTests are performed sequentiallyDoes not measure Frame Delay VariationDoes not verify CIR, CBS, EIR, EBS and CM Y.1564 advantagesTests all KPIs at same timeTest to CIR to verify SLA performance (FD, FDV,FLR)Tests to EIR limit and just beyond to verifypolicing behavior (no SLA performance expectedfor yellow frames (above CIR and below CIR EIR) 2009 Cisco Systems, Inc. All rights reserved.Cisco Public25441564Service centricDevice CentricAll KPI measured in1 testSequential TestsIncludes Jitter, CIR/EIR,CBS/EBSMissing KPIFaster Execution50
Ethernet OAMInterworkingPresentation ID 2009 Cisco Systems, Inc. All rights reserved.Cisco Public51
What Is OAM Interworking?Operator AEdge RouterATM SwitchATM SwitchEdge BridgeCustomerBridgeEthernetover MPLSBridgeBridgeRouterRouterEthernetover SONETRouterBridgeswitchswitchStrict OAM layering should be honored: messages should not cross layersOAM Messages should not leak outside domain boundaries within a layerInterworking is event translations & not necessarily 1:1 message mappingInterworking may be inter-layer and intra-layerCustomerBridge Operator BEventTranslation10GATM interEthernetRFC1483domains intra-layerService OAMServer Layers feedevents into Client LayersNetworkOAMTransportOAM 2009 Cisco Systems, Inc. All rights reserved.NetworkOAMTransportOAMCisco PublicTransportOAMTransportOAM52
Ethernet OAMDeployment UseCases 2009 Cisco Systems, Inc. All rights reserved.Cisco Public53
Ethernet OAM Deployment Use Case #1Ethernet L2 VPN SLA MonitoringEthernet Service ProviderL2 VPNCustomerL2 VPNCustomerL3 CEEVCL3 CENID /Access /Demarcation DeviceEVCShadowRouterNIDOptionalL2 VPNCustomerL3 CEEVC Ethernet Virtual CircuitNID Network Interface Device CFM Maintenance Association End Point (MEP)----- IP-based probe 2009 Cisco Systems, Inc. All rights reserved.Cisco Public54
Ethernet OAM Deployment Use Case #2Mobile Backhaul Service MonitoringDistributionRouterEthernet Service ProviderEVCDemarcSAE 4GGWRNC 3GeNodeB (4G) Cell SiteNodeB (3G) RouterBTS (2G)DemarcEVCDemarcProbe(Optional)BSC 2GDistributionRouterMobile OperatorCell Site(s)Wireline Provider / Mobile Backhaul OperatoreNode B Enhanced Node BSAE GW System Arch Evolution GWRNC Radio Network Controller 2009 Cisco Systems, Inc. All rights reserved.MTSO Mobile Telephone Switching OfficeBTS Base Transceiver StationBSC Base Station ControllerCisco PublicMobile OperatorMTSOEVC Ethernet Virtual CircuitNID Network Interface De vice CFM Maintenance Association End Point (MEP)55
Ethernet OAM Deployment Use Case #3Monitoring of Ethernet Access to L3VPNEthernet Service ProviderVRFL3 VPNCustomerEVCManagedL3 CEG.SHDSLAggregatorDemarc DeviceEVCNIDInternetL3 PEIP / MPLS CoreShadowRouterDSLAMOptionalManagedL3 CEIP Department 2009 Cisco Systems, Inc. All rights reserved.Third Party Ethernet Service ProviderOr Transport / Aggregation DepartmentEVC Ethernet Virtual CircuitNID Network Interface Device CFM Maintenance Association End Point (MEP)----- IP-based probeCisco PublicIP Department56
Ethernet OAM Deployment Use Case #4Monitoring of Broadband & Wholesale Ethernet Access ServiceEthernet Service ProviderResidentialSubscribersVRFEVCDSLAMPON OLTAggregatorAggregatorInternetBNG/BRAS SP Retail ISPEVC(Bitstream Wholesale)InternetRetail ISPWholesale SPsubscribersBroadband Department 2009 Cisco Systems, Inc. All rights reserved.Third Party Ethernet Service ProviderOr Transport / Aggregation DepartmentEVC Ethernet Virtual CircuitNID Network Interface Device CFM Maintenance Association End Point (MEP)Cisco PublicBroadband Department /Wholesale SP57
Ethernet OAM Deployment Use Case #5Monitoring of Ethernet Service over DOCSIS CableL2 VPNCustomerEthernetService ProviderCable MSO(HFC)Cable MSO(HFC)NID /DemarcationEVCL2 VPNCustomerNID /DemarcationL2 VPNCustomerEVC Ethernet Virtual CircuitNID Network Interface Device CFM Maintenance Association End Point (MEP)----- IP-based probe 2009 Cisco Systems, Inc. All rights reserved.Cisco Public58
Ethernet OAM Deployment Use Case #6Ethernet Last Mile Testing with Dataplane Loopback 2009 Cisco Systems, Inc. All rights reserved.Cisco Public59
Ethernet OAM Deployment Use Case #7Fault Management - Fault detection, Loop detection, Node monitoring,LAG port monitoring, reachability check .CustomerEthernet Service ProviderNID /DemarcationEthernetOr MPLS CoreEthernetTransportNID /DemarcationEthernetTransportCustomerNID /DemarcationCustomerEVC Ethernet Virtual CircuitNID Network Interface Device CFM Maintenance Association End Point (MEP)----- IP-based probeLink OAM Sessions 2009 Cisco Systems, Inc. All rights reserved.Cisco Public60
Deployment Use Case #8Service Activation and Throughput Test with Loopback Application: Service Turn-Up (out-of-service)Throughput Test - POP-Local CPE (shown) or POP-Remote CPECustomer siteEthernet Service ProviderX,YLoopbackA,Bip Ymac CCentralTest HeadTest TrafficEVCManagedCPEL3 Provider POPEVCVRFip Wmac Bip Xmac AA,BL3 accelerated (no CPU intervention)IPv4/IPv6-aware LoopbackConfigurable source IPv4/IPv6 of packets to loopIP address swap (implicit MAC swap) 2009 Cisco Systems, Inc. All rights reserved.Cisco Public61
Fault ManagementScenariosPresentation ID 2009 Cisco Systems, Inc. All rights reserved.Cisco Public62
High Level TopologyCisco3800L3 VPN“A”L3 VPN“B”Catalyst3750-MEEthernet access toMPLS VPN (EoMPLS)L2VPN P2P / MP(EoMPLS / VPLS)CFMIEEE oreAccessCiscoME-3400Link OAMIEEE 802.3ah 2009 Cisco Systems, Inc. All rights reserved.Cisco PublicCisco280063
Fault Management ScenariosNumber1DescriptionEnd-to-End Service/Path VerificationFault Verification/Isolation23Using E-OAM for Ethernet Access to L3VPNE2E CPE Fault Notification & CPE Corrective Actionusing Ethernet OAM Interworking 2009 Cisco Systems, Inc. All rights reserved.Cisco Public64
Operational Scenario 1 Problem StatementFault Verification and Fault Isolation of ethernet connectivity issues Problem SolutionIEEE 802.1ag (CFM) Ping and Traceroute utilities for reactivetroubleshooting of service connectivity issuesCustomerService ProviderMPLSAggregationEthernetAccessCE 11uPE 11PE-AggnPE 11EthernetAccessnPE 31uPE 31CE 31CustomerDomainService ProviderDomainOperator Domain 2009 Cisco Systems, Inc. All rights reserved.Cisco Public65
Operational Scenario 1 (cont.) Problem StatementFault Verification and Fault Isolation of ethernet connectivity issues Problem SolutionIEEE 802.1ag (CFM) Ping and Traceroute utilities for reactivetroubleshooting of service connectivity issuesCustomerService ProvideruPE11uPE31Core level 4 vlan 100mpid 3100EthernetuPE11#ping ethernet MPLSAccessCE 11uPE 11EthernetAccessType escape sequence to abort.SendingEthernet CFM loopback messages,timeoutis 2 uPEseconds:PE-AggnPE511nPE3131CE!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max 1/1/1 ms31CustomerDomainService ProviderDomainOperator Domain 2009 Cisco Systems, Inc. All rights reserved.Cisco Public66
Operational Scenario 1 (cont.) Problem StatementFault Verification and Fault Isolation of ethernet connectivity issues Problem SolutionIEEE 802.1ag (CFM) Ping and Traceroute utilities for reactivetroubleshooting of service connectivity issuesCustomerService ProvideruPE11nPE11nPE31uPE310012.017c.3d00 level 4Ethernetvlan 100MPLS CoreEthernet uPE11#traceroute ethernetType escape sequence to abort. TTL 255. Per-Hop Timeout is 10 secondsAccessAccess Tracing the route to 0012.017c.3d00 on Domain PROVIDER DOMAIN,Level 4, vlan 100CE 11uPE 11Traceroute sent via GigabitEthernet0/16PE-AggnPE 11nPE 31uPE 31CE ---------------------------------------MACIngress Ingress ActionRelay DomainActionHopsHostForwardedEgress Egress ActionNext HopService -------------------------------------B 1nPE110013.5f21.cec5 Gi3/1IngOkRlyCCDBDomainForwardedB Operator Domain! 3uPE310012.017c.3d00 Gi1/1/1 IngOkRlyNoneNot Forwarded67 2009 Cisco Systems, Inc. All rights reserved.Cisco Public
Operational Scenario 1 (cont.) Problem StatementFault Verification and Fault Isolation of ethernet connectivity issues Problem SolutionIEEE 802.1ag (CFM) Ping and Traceroute utilities for reactivetroubleshooting of service connectivity issuesCustomernPE31(config)#int gig3/1nPE31(config-if)#shutdo
Carrier Ethernet OAM Protocol Positioning E-LMI - User to Network Interface (UNI) Link OAM - Any point-point 802.3 link CFM, Y.1731 PM - End-to-End UNI to UNI MPLS OAM - within MPLS cloud Core Customer MPLS/IP Business Residential Business Residential UNI NNI NNI NNI UNI Customer MPLS OAM .
Referred to as Carrier Ethernet services by the Metro Ethernet Forum The terms "Carrier Ethernet"and "Metro Ethernet"are used interchangeably in this presentation, but in the strict sense of the term, "Carrier Ethernet"refers to the carrier-grade evolution of "Metro Ethernet" Introduction to Metro Ethernet Services
§ Referred to as Carrier Ethernet services by the Metro Ethernet Forum § The terms "Carrier Ethernet" and "Metro Ethernet" are used interchangeably in this presentation, but in the strict sense of the term, "Carrier Ethernet" refers to the carrier-grade evolution of "Metro Ethernet" Introduction to Metro Ethernet Services
Referred to as Carrier Ethernet services by the Metro Ethernet Forum The terms "Carrier Ethernet" and "Metro Ethernet" are used interchangeably in this presentation, but in the strict sense of the term, "Carrier Ethernet" refers to the carrier-grade evolution of "Metro Ethernet" Introduction to Metro Ethernet Services
Circuit Emulation Services over Carrier Ethernet Enables TDM Services to be transported across Carrier Ethernet network, re-creating the TDM circuit at the far end - Runs on a standard Ethernet Line Service (E-Line) - T1 replacement for businesses - Enables T1 alongside Ethernet for Cell BH Carrier Ethernet Network TDM Circuits (e.g. T1/E1 Lines)
What Is SP Metro Ethernet? Delivers an Ethernet UNI to businesses/subscribers for WAN/Broadband connectivity SP has multiple transport, access and service offering options 100 Mbps Ethernet Remote Worker/ Subscriber Regional Headquarters 10 Mbps Ethernet 10 Mbps Ethernet Subscriber SP Metro Ethernet Network Remote Office 2 Remote Office .
Carrier Ethernet Service E-Line for General Availability i.4 Carrier Ethernet Service Ethernet Virtual Private Line (EVPL) Ethernet Virtual Private Line (EVPL) – Uses a service multiplexed UNI or NNI that allows a single UNI/NNI connection to support
Ethernet OAM Decoder Ring IEEE 802.1ag Connectivity Fault Management (CFM) Also referred as Service OAM IEEE 802.3ah (clause 57) Ethernet Link OAM Also referred as 802.3 OAM, Link OAM or Ethernet in the First Mile (EFM) OAM ITU-T Y.1731 OAM functions and mechanisms for Ethernet-based networks MEF E-LMI Ethernet Local Management Interface
Carrier Aggregation LTE-Advanced maximum bandwidth Carrier 1 Carrier 2 Carrier 3 Carrier 4 Carrier 5 Rel'8 BW Rel'8 BW Rel'8 BW Rel'8 BW Rel'8 BW Release Max No of Carriers Peak DL Rate 2x2 MIMO 8x8 MIMO LTE-A 5 (up to 100 MHz) 1 Gbps 3.9 Gbps LTE-A Pro 32 (up to 640 MHz) 6.3 Gbps 25.1 Gbps
