Carrier Ethernet Operations, Administration & Maintenance Santanu Dasgupta 1 Acknowledgement   Jose Liste   Sudarshan Pathalam 2 Agenda   OAM Overview   Ethernet OAM – Protocol Overview IEEE 802.3ah – Link OAM, also known as EFM IEEE 802.3ag – Connectivity Fault Management (CFM) ITU Y.1731 – Fault & Performance Management MEF E-LMI – Configuration Management   Ethernet Service Activation Testing   OAM Interworking   Sample Fault Management Scenarios   Ethernet OAM Deployment Use Cases   Summary 3 Operations, Administration & Maintenance   F – Fault Management   C – CFonfiguraCtion ManaAgement PS   A – Accounting   P – Performance Management   S – Security Management OAM Protocols and Mechanisms helps operator to achieve some of the FCAPS functionality OAM capability is one of the key differentiator to make a SP network truly “Carrier Grade” 4 Problem Scope A few possible scenarios Excessive Uni-directional D-LDP session Encoding Errors Link Duplex failure SP Network mismatch Access Core VC failure Excessive Customer Equipment FCS Errors U-PE D C-VLAN N-PE 1 N-PE 3 to EVC U-PE A MPLS CrosCsE- connected mismatchC E Unexpected SONET/SDH LSP Speed Service Native Endpoint Failure Ethernet mismatch PW CE N-PE 4 CE U-PE B MPLS U-PE C N-PE 2 AC Ethernet UNI Ethernet UNfaI ilure Physical PW failure link failure Physical VLAN to VFI link failure xconnect failure UNI VFI port failure failure Physical U-PE P-Router link failure device failure failure 5 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 interfaces Management Plane N (NMS / EMS) ß à S Network Plane (Elements) W ßà E 6 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 interfaces Management Plane N (NMS / EMS) ß Primary Focus of Ethernet OAM protocols is on W ßà E inàteractions S (across NEs) Network Plane (NEs) W ßà E 7 Focus Areas of Ethernet OAM UNI UNI Access Aggregation Edge Core Edge Aggregation Access U-PE PE-AGG N-PE N-PE PE-AGG U-PE Core Core EPL   EVPL   EP-­‐LAN   EVP-­‐LAN   EP-­‐TREE   EVP-­‐TREE   AC  EPL   AC  EVPL   CE Services & Network Infrastructure Fault Management Config Management Performance Management Fault Detection Frame Loss Measurement Fault Notification Delay Measurement Service Provisioning Fault Verification Delay Variation Measurement Fault Isolation Availability Measurement Fault Recovery 8 Ethernet OAM Building Blocks PMearnfoargmemanecnet ManFaagueltm ent Performance ManaPMgearnfoaergmemamnecnet ent ManFaagueltm ent Configuration ManCaMoannfgiaggueremateionmnt ent E - LEM- LI M I I P S L A s CMoannfiagguermateionnt 8 0 2 . 1 a g / Y. 1 7 3 1 8 0 2 . 3 a h Fault PMearnfoargmemanecnet ManaMagnFaagueeltm emnt ent CMoannfiagguermateionnt   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 networks   MEF E-LMI: Ethernet Local Management Interface   IP SLA’s: Performance Management using CFM and Y.1731 mechanisms 9 Carrier Ethernet OAM Protocol Positioning Connectivity Customer AggEreA-LgcaMcteiIo sns Fault MCaonrae gement Aggregation Customer Y.1731 Performance Business Management Business MPLS OAM Ethernet Ethernet Ethernet MPLS/IP MPLS/IP MPLS/IP Link OAM Residential Residential UNI NNI NNI NNI UNI   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 10