D-Link DGS-6600-48TS Configuration Guide - Page 373

Volume 5-Multiprotocol Label Switching / Chapter 35-Virtual Private Lan Services (VPLS) Chapter Overview Chapter 35 Virtual Private Lan Services (VPLS) Chapter Overview The following topics are included in this chapter, please go to the topic for more detailed information: • Chapter Overview • An Introduction to VPLS • Attachment Circuit (AC) • Pseudowire (PW) • MPLS Tunnel • VPLS Service • VPLS Configuration Commands • Creating a VPLS • Setting a VPLSID • Psuedowire configuration • Encapsulation Configuration • Setting a local AC link MTU of a VPLS • Clearing Mac Address Tables for VPLS • Configuration Examples • MPLS - VPLS Configuration Example • Configuration Restrictions and Constants An Introduction to VPLS A Virtual Private LAN Service (VPLS) is an L2VPN service that emulates LAN service across a Wide Area Network (WAN). The primary motivation of VPLS is to provide connectivity between geographically dispersed customer sites across MANs and WANs, as if they were connected using a LAN. All PEs which participate in a VPLS interconnect each other via a full mesh of Pseudowires (PWs) through the provider network (i.e. MPLS network in this specification). A CE connects to a VPLS by attaching to one of the PEs via an Attachment Circuit (AC). VPLS operation emulates an IEEE Ethernet bridge and it is fully capable of learning and forwarding a frame on Ethernet MAC address. So a CE can transmit the frames to multiple remote CEs. When a CE transmits a frame, the PE that receiving it examines the addressing information in the frame's L2 header in order to determine how to forward the frame (to a local CE or a remote PE via PW). Forwarding decisions are made in the manner that is normal for bridges, which is based on MAC source address learning. DGS-6600 Configuration Guide 373