Extreme Networks BlackDiamond 6800 MPLS Installation And User Manual page 111

7 Configuring MPLS Layer-2 VPNs
The chapter describes Layer-2 VPN services and the following topics:
• Overview of MPLS Layer-2 VPNs on page 7-1
• TLS VPN Characteristics on page 7-5
• Configuring MPLS Layer-2 VPNs on page 7-6
• TLS VPN Configuration Examples on page 7-10
• Using ESRP with MPLS TLS on page 7-17
Overview of MPLS Layer-2 VPNs
The basic idea behind transparent LAN services (TLS) over MPLS is to enable Layer-2
virtual private networking (VPN) service offerings in a simple manner that is easy to
deploy and operate. Layer-2 VPN services, based on a combination of Ethernet and
MPLS/IP technologies, are designed to enable service providers to offer Ethernet
business private line services. These services are also referred to as Transparent LAN
Services (TLS) or Virtual Private LAN Services (VPLS). Layer-2 VPN services use a
simple Layer-2 interface at the customer edge combined with the resilience and
scalability of an MPLS/IP core to provide VPN connectivity.
MPLS Module Installation and User Guide 7-1