In a Carrier Ethernet network, data is transported across Point-to-Point and Multipoint-to-Multipoint Ethernet Virtual Connections(EVCs) according to the attributes and definitions of the E-Line, E-LAN, and E-Tree Service Types defined in the MEF specifications.

Each EVC carries data in the form of Carrier Ethernet Service Frames from UNI to UNI as shown in the diagram. The UNI (User Network Interface) is defined as the physical demarcation point between the responsibility of the Service Provider and the responsibility of the Subscriber.

An additional service type (E-Access) is provided to facilitate wholesale service provider interconnections at the ENNI. The ENNI (External Network Network Interface) is defined as the physical demarcation point between the responsibility of two interconnecting Service Providers.

Further, each Service Type consists of both Port Based and VLAN aware services, for example, the point-to-point EPL and EVPL services.

Each EVC can be configured with a rich set of attributes that (bandwidth profiles (CIR, EIR, CBS, EBS), multiple classes of service, application-oriented performance objectives, traffic management, forwarding rules, etc.

CE 2.0

CE 2.0 is a ubiquitous, standardized, carrier-class Service and Network defined by five attributes that distinguish it from familiar LAN-based Ethernet. Enterprise users more typically refer to Carrier Ethernet as Ethernet Business Services.

CE 2.0 supercedes CE 1.0. Since 2012 CE 2.0 - a new generation of Carrier Ethernet defined below - is having a significant impact on the market. CE 2.0 greatly expands from 3 services in CE 1.0 to 8 services, 2 of each respectively in E-Line, E-LAN, E-Tree, and E-Access (defined in MEF Standards MEF 6.1, 22.1, 33)The industry's first standardized Multi-CoS with application-oriented CoS Performance Objectives, new metrics (MEF 6.1, 10.2, 20, 23.1) Interconnect through the integrated delivery of MEF Service Attributes (MEF 10.2, 26.1, 33) allows ubiquitous deployment spanning multiple providers Manageability, (MEF 7.1, 16, 17, 30, 31) plus additional specifications.

For Service Providers: CE 2.0 is set of MEF CE 2.0 Certified network elements that connect to transport Carrier Ethernet services for all users, locally & worldwide. Carrier Ethernet services are carried over physical Ethernet networks and other legacy transport technologies.

Click "Show More" for descriptions of all eight CE 2.0 Services, bandwidth profiles, Mult-CoS, traffic management ...

CE 2.0 E-Line Services

  • CE 2.0 EPL and EVPL services as defined in MEF 6.1 can be used to create a broad range of point-to-point services
  • A CE 2.0 EPL service uses dedicated UNIs and provides a high degree of transparency such that Service Frames are identical at both the source and destination UNIs.  All-to-one bundling at the UNIs minimizes the coordination between the Subscriber and Service Provider on the definition of the CE-VLAN ID/EVC Map at each UNI
  • A CE 2.0 EVPL service allows for service multiplexing and bundling enabling the support of multiple EVCs at the UNI and the mapping of more than one CE-VLAN ID per EVC

CE 2.0 E-LAN Services

  • CE 2.0 EP-LAN and EVP-LAN services as defined in MEF 6.1 can be used to create a broad range of multipoint-to-multipoint services
  • A CE 2.0 EP-LAN service uses dedicated UNIs and provides a high degree of transparency such that Service Frames are identical at both the source and destination UNIs.  All-to-one bundling at the UNIs minimizes the coordination between the Subscriber and Service Provider on the definition of the CE-VLAN ID/EVC Map at each UNI
  • A CE 2.0 EVP-LAN service allows for service multiplexing and bundling enabling the support of multiple EVCs at the UNI and the mapping of more than one CE-VLAN ID per EVC

CE 2.0 E-Tree Services

  • CE 2.0 EP-Tree and EVP-Tree services as defined in MEF 6.1 can be used to create a broad range of rooted-multipoint services.
  • A CE 2.0 EP-Tree service uses dedicated root and leaf UNIs and provides a high degree of transparency such that Service Frames are identical at both the source and destination UNIs.  All-to-one bundling at the UNIs minimizes the coordination between the Subscriber and Service Provider on the definition of the CE-VLAN ID/EVC Map at each UNI
  • A CE 2.0 EVP-Tree service uses root and leaf UNIs and allows for service multiplexing and bundling enabling the support of multiple EVCs at the UNI and the mapping of more than one CE-VLAN ID per EVC

CE 2.0 E-Access Services

  • CE 2.0 Access EPL and Access EVPL services as defined in MEF 33 can be used to create a broad range of access services
  • A CE 2.0 Access EPL service interconnects a dedicated UNI and an ENNI.  It provides a high degree of transparency such that Service Frames are delivered unchanged at the ENNI with the addition of an S-VLAN tag and the ENNI Frames are delivered unchanged at the UNI except for the removal of the S-VLAN tag
  • A CE 2.0 Access EVPL service uses a UNI that can support multiple service instances.  Access EVPL provides a high degree of transparency such that Service Frames are delivered unchanged at the ENNI with the addition of an S-VLAN tag and the ENNI Frames are delivered unchanged at the UNI except for the removal of the S-VLAN tag

Carrier Ethernet CE 2.0 Service Definitions and Attributes

Bandwidth Profiles are Governed by

  • CIR Committed Information Rate is Guaranteed Data Rate
  • EIR Excess Information Rate exceeds CIR, but will be delivered “Best Efforts”
  • CBS/EBS Committed/Excess Burst Size

Color Mode

  • Green – Forwarded frames – CIR conforming traffic
  • Yellow – Forward with Best Effort frames – Over CIR , within EIR
  • Red – Discarded frames – Exceeds EIR

Industry’s First Standardized Multi-CoS

  • CoS Differentiates and Prioritizes services
  • Bandwidth Profile Assignment Per CoS
  • Performance Monitoring per CoS

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