Metro Ethernet UNI Standards Update Gary Southwell VP of Product Marketing Internet Photonics MEF Marketing Collateral co-chair

Agenda UNI – Purpose UNI – Overview of Requirements UNI – Architectural Fit UNI – Enabled services Status & next steps/activities

Ethernet Services Standardization Services Metro Ethernet Forum Network Implementation IEEE and IETF PPVPN OA&M Metro Ethernet Forum UNI

Metro Ethernet UNI PurposePurpose –Provides a network subscriber edge demarcation point for a MEN RequirementsRequirements Define demarcation for service –connectivity, –signaling, –Provisioning –Fault detection/resolution –Monitoring and management

Ethernet Services Model, Phase 1 Metro Ethernet Network Customer Edge (CE) User Network Interface (UNI) Customer Edge (CE) Service Attributes A service is what the CE sees (UNI-to-UNI). The technology used inside the MEN is not visible.

User Network Interface (UNI) Dedicated to a single SubscriberDedicated to a single Subscriber Standard Ethernet (IEEE – 2002)Standard Ethernet (IEEE – 2002) –More than 100 million devices available as CE Examples:Examples: –RJ 45 Socket on Service Provider owned Ethernet switch –RJ45 plug on Service Provider owned cable The demarcation point between Service Provider and Subscriber Responsibilities

Service Definitions Ethernet Line Service (E-Line)Ethernet Line Service (E-Line) –Point-to-Point EVC –Any valid set of other service attributes Ethernet LAN Service (E-LAN)Ethernet LAN Service (E-LAN) –Multipoint-to-Multipoint EVC –Any valid set of other service attributes Examples for typical scenarios, e.g., LAN Extension, Internet Access, Headquarters to Branch OfficesExamples for typical scenarios, e.g., LAN Extension, Internet Access, Headquarters to Branch Offices

E-Line Service UNI CE Point-to-Point Ethernet Virtual Circuits Metro Ethernet Network 1 or more UNIs UNI Video IP PBX Servers Data IP Phone

E-LAN Service CE Metro Ethernet Network CE Multipoint-to-Multipoint Ethernet Virtual Circuit UNI IP PBX Servers Data IP Phone

UNI Reference Point UNI divided into two subsetsUNI divided into two subsets –UNI-C describes the end customer UNI –UNI-N describes the end customer UNI

UNI Reference Model UNI data planeUNI data plane –defines the means of transporting information across the UNI reference point UNI control planeUNI control plane –defines the means for the customer and the MEN provider to make use of the UNI data plane UNI management planeUNI management plane –controls the operation of the UNI data and control plane

UNI Data Plane Ethernet frame flowEthernet frame flow –IEEE frames (only) TaggingTagging –Allows customer equipment (CE) to send 802.1q tagged frames across the UNI for segmentation purposes Traffic MgmtTraffic Mgmt –Binds the subscriber transmissions to traffic policies as set by an SLA

UNI Control Plane a static service discovery function that allows no or auto-configuration of the CE (PVC mode)a static service discovery function that allows no or auto-configuration of the CE (PVC mode) a dynamic connection setup function that allows dynamic establishment of Ethernet services (SVC mode).a dynamic connection setup function that allows dynamic establishment of Ethernet services (SVC mode).

UNI Management Plane QOS MgmtQOS Mgmt –Allows provisioning of service attributes thought traffic identifiers Protection & restorationProtection & restoration –Allows links from the (CE) into the MEN to be protected by various means OAMOAM –Connectivity verification, performance monitoring and SLA stats gathering

Ethernet Services Control Function A UNI-N - Demarc Component (ESCF)A UNI-N - Demarc Component (ESCF) ESCFESCF –SP’s network equipment that provides the functional element required to meter, police and shape the flow to and from the SP’s Demarc 1st point where policy is enforced in the MEN1st point where policy is enforced in the MEN

Ethernet Virtual Connection (EVC) Association of two or more UNIsAssociation of two or more UNIs Frames can only be exchanged among the associated UNIsFrames can only be exchanged among the associated UNIs A frame sent into the SP network via a particular UNI MUST NOT be delivered out of the SP network via that UNIA frame sent into the SP network via a particular UNI MUST NOT be delivered out of the SP network via that UNI

EVCS & Closed User Groups EVCS can form closed user groups (CUGS)EVCS can form closed user groups (CUGS) –Marked by VLANs or other means of identification Frames can only be exchanged among the associated UNIsFrames can only be exchanged among the associated UNIs Note UNIs can support multiple CUGsNote UNIs can support multiple CUGs

Point-to-Point EVC Exactly two UNIs are associated.

Multipoint-to-Multipoint EVC Two* or more UNIs are associatedTwo* or more UNIs are associated A flooded, broadcast or multicast ingress frame is typically replicated and delivered to all of the other UNIsA flooded, broadcast or multicast ingress frame is typically replicated and delivered to all of the other UNIs * A MP2MP EVC with two UNIs is different than a P2P EVC since additional UNIs can be added at any time.

Service Multiplexing A D C B Multiple EVCs at a UNIMultiple EVCs at a UNI Efficient use of CE portEfficient use of CE port Multiple revenue streams per SP UNIMultiple revenue streams per SP UNI Service Multiplexing EVC 1 EVC 2 EVC 3

UNI Service Model

UNI Traffic and Performance Control examples Ingress policing based on a two rate, three color Token Bucket modelIngress policing based on a two rate, three color Token Bucket model –Similar to the CIR, B c, B e of Frame Relay –Allows Subscriber to buy bandwidth with high granularity Performance parameters, e.g., Frame Delay, Frame Loss, AvailabilityPerformance parameters, e.g., Frame Delay, Frame Loss, Availability –Definitions for the basis of a Service Level Specification in a Service Level Agreement

UNI EVC Control Example Customer Equipment configuration controlCustomer Equipment configuration control

UNI Modes 1.Start with Static UNI-C config…100% of installed base compatible No chgs to Customer device config.No chgs to Customer device config. E.g. assigned VLANs)E.g. assigned VLANs) 2.Introduce auto provisioning DCE Access to CE via LMI to learn what it is connected to and configures CE automaticallyDCE Access to CE via LMI to learn what it is connected to and configures CE automatically E.g. configured VLANsE.g. configured VLANs PVC

UNI Modes 1.UNI-C requests via signaling what EVCs it desires connectivity with 2.Negotiates the service parameters if applicable 3.Provides for backward comaptibility SVC (Full Definition still pending)

Ethernet OA&M CE CE OA&MOA&M OA&M AvailabilityAvailability Status MonitoringStatus Monitoring ScalabilityScalability ExtensibilityExtensibility SecuritySecurity Tunnel and Transport IndependenceTunnel and Transport Independence Layer 3 IndependenceLayer 3 Independence

Status Ethernet UNI 1.0 in draftEthernet UNI 1.0 in draft UNI 1 Interoperability Agreement work in processUNI 1 Interoperability Agreement work in process UNI 2 - work in processUNI 2 - work in process

Thank You