Ethernet private line (EPL) and Ethernet virtual private line (EVPL) are Ethernet services defined by the Metro Ethernet Forum (MEF) and fall under their Ethernet services category ‘E-Line’.
Both EPL and EVPL Ethernet provide the simplicity of private connections combined with the flexibility and scalability of MPLS technology across a range of bandwidths, but the main difference for businesses is the configuration they would require.
EPL provides Point-to-Point (P2P) connectivity between a pair of dedicated User Network Interfaces (UNIs) and allows for a high degree of transparency along the network.
EVPL, however, can enable multiple Ethernet Virtual Connection (EVCs) per UNI to support Point-to-Multipoint (P2MP) connectivity through the use of service multiplexing meaning businesses can benefit a one-to-many topology.
As well as E-Line via EPL or EVPL, there are also a number of other Ethernet connectivity options available such as VPLS (E-LAN) and NNI (ENNI) and P2NNI (E-Access). VPLS enables a many-to-many topology that can securely connect multiple sites in to a single bridged domain with flexible capacity.
For larger businesses, a Network-to-Network Interface (NNI) is the best solution, offering a high bandwidth single point of access in a core network location ensuring high availability and low latency.