VLL

Hello there!

The Virtual leased line (VLL) technology, also called Virtual Private Wire Service (VPWS), emulates leased lines on an IP network to provide a low-cost asymmetrical digital data network (DDN) service. It is a point-to-point (P2P) Layer 2 tunneling technology, based on Multiprotocol Label Switching (MPLS), which allows the exchange of data packets between networks using different media.

Purpose

There are many different types of Layer 2 networks: Ethernet, Asynchronous Transfer Mode (ATM), Frame Relay (FR) and High-Level Data Link Control (HDLC). However, because they use different protocols, they are isolated from one another.

More Ethernet connections are required between large cities and remote areas. Traditionally, service providers use direct-leased lines or set up Layer 2 tunnels between two areas, but this is expensive and can be difficult to maintain and extend.

Please visit the link below for more information:

https://support.huawei.com/enterprise/es/doc/EDOC1000178179/3e8aae35/overview-of-vll.