Ethernet Virtual Private Line (EVPL) is a carrier Ethernet service that delivers point-to-point or point-to-multipoint connectivity between customer sites. It offers more flexibility than the standard Ethernet Private Line (EPL) by allowing multiple services or service attributes to be delivered over a single connection. Here’s a comprehensive overview of EVPL:
Definition:
- EVPL is defined by the Metro Ethernet Forum (MEF) in the MEF 6.1 and MEF 10.1 standards. It’s designed to connect two or more user network interfaces (UNIs) with a combination of dedicated and multiplexed services.
Characteristics:
- Service MultiplexingMultiple services (like Internet access, MPLS, and VoIP) can be provided over a single physical connection.
- VLAN-AwareUnlike EPL, which is transparent to VLAN tags, EVPL often involves VLAN tagging and can differentiate services based on those tags.
- Configurable Service AttributesEVPL allows for different classes of service, enabling prioritization of specific traffic types over others.
Benefits:
- FlexibilitySupports multiple services over a single connection, making it adaptable to varied business needs.
- ScalabilityEasily adjust bandwidth or add/remove services as required.
- Cost-EffectiveBy multiplexing services over a single connection, businesses can reduce the total number of required connections, leading to potential cost savings.
- Enhanced Traffic ManagementEVPL’s ability to recognize and handle different VLAN tags means businesses can better manage and prioritize different types of traffic.
Use Cases:
- Hybrid Connectivity: A business might need a combination of dedicated connectivity between its main office and data center (using EPL) and a shared, multiplexed connection to its branch offices (using EVPL).
- Service Segregation: A company could use EVPL to segregate VoIP, data, and video conferencing services, ensuring each has the appropriate bandwidth and priority.
Differences from Other Services:
- EVPL vs. EPL: While both can provide point-to-point connectivity, EVPL allows for service multiplexing on a single connection, whereas EPL offers a transparent, dedicated link.
- EVPL vs. E-LAN: EVPL is typically point-to-point or point-to-multipoint, while E-LAN provides multipoint-to-multipoint connectivity, interconnecting multiple sites as if they’re on the same local network.
Considerations:
- Management Complexity: With the flexibility and multiplexing capabilities comes the need for more complex management and configuration, especially when dealing with multiple VLAN tags and services.
- Security: Because multiple services might share the same physical connection, businesses must ensure each service is securely isolated from the others.
In summary, Ethernet Virtual Private Line (EVPL) is a versatile carrier Ethernet service that combines the best of dedicated and multiplexed services. It’s particularly beneficial for businesses that need a mix of dedicated links and shared services, offering flexibility, scalability, and efficient use of bandwidth.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
Fiber Internet
Internet delivered through strands of glass using light. Fiber commonly supports high capacity, low latency, and strong upload performance, but availability must be confirmed for the exact address.
Bandwidth
The amount of data a connection can carry in a given time, usually measured in Mbps or Gbps. More bandwidth supports more users, devices, and simultaneous applications.
MPLS
Multiprotocol Label Switching, a private-network technology that directs traffic along managed paths. Organizations use it for predictable connectivity between locations.
VoIP
Voice over Internet Protocol carries phone calls over an IP network instead of a traditional analog phone line. Call quality depends on network stability, latency, and traffic management.
Cybersecurity
The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.
Zero Trust
A security model that does not automatically trust a user or device because of its location. Access is continuously verified and limited to what is necessary.