All you need to know on CE 2.0 E-Access

In 2012, the Metro Ethernet Forum (MEF) defined a new Ethernet service type, called Ethernet Access, or E-Access. The new service type was added to the three defined service types: E-LINE, E-TREE and E-LAN.

Two service providers with adjacent territories typically offer E-Access. This service can also include in the offerings of a wholesale Ethernet access provider to service providers, who have customers beyond the coverage area of their network. This might require them to extend their service reach beyond the network coverage area.

E-Access-Service-diargam1

Any Ethernet service that is based on an operator virtual connection (OVC) that associates at least one OVC End Point at a UNI (“e” or “f” in the figure below), and at least one OVC End Point at an E-NNI (“b” or “c” in the figure below), is designated as an E-Access service type.

E-Access-Service-diargam1

E-Access can be used in a number of ways:

  • To connect to the Internet and provide centralized high-speed Internet access
  • To connect to virtual private networks (VPN) in order to provide connectivity to one customer/company in multiple locations or branches
  • To connect a cloud customer that requires a dedicated Ethernet UNI for a WAN connection from his location to the cloud provider’s datacenter

In all cases, E-Access gives the service provider higher throughput with lower cost per Mb than extending its own network.

Currently, E-Access specifies two types of Ethernet services:

  • Access Ethernet Private Line Service (Access EPL) – uses a point-to-point OVC between the UNI and ENNI and allows frames at the UNI to be delivered unchanged to the ENNI, with the addition of an S-VLAN tag or MPLS header. In this service, all untagged, and any CE-VLAN tagged frames are mapped to one OVC at the UNI.
  • Access Ethernet Virtual Private Line (Access EVPL) – uses a point-to-point OVC between the UNI and ENNI, similar to Access EPL, however, with the support of multiple service instances, including a mix of Access and EVC services.

The service provider and access provider need to coordinate the value of the S-VLAN ID or MPLS label at the ENNI and other related service attributes.

Additional resources

E-Access is included in Telco Systems MEF CE 2.0 certification program

Read more about Telco Systems T-Metro multiservice E-Access platform

Download the data sheet of Telco Systems T-Metro Ethernet Access device

FacebookLinkedInTwitterShare

Related posts