VLL

Virtual Leased Line (VLL) is a Layer 2 Virtual Private Network (L2 VPN) architecture that provides point-to-point Ethernet line or Virtual Private Wire Services (VPWS).

A VLL instance is a special type of VPLS deployment.

VLL provides point-to-point (p2p) connectivity between two access networks or endpoints. Typically, a VLL is used to connect two sites that are geographically apart.

The following figure depicts an enterprise VLL service.

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Enterprise leased line service (VLL)

CE1 and CE2 are the customer edge devices in geographically separate sites.

Pseudowire (PW) is a circuit emulation infrastructure that extends L2 connectivity from CE1 to CE2 by way of PE1 and PE2. The tunnel is typically a L3 tunnel on which a L2 circuit is emulated.