“VPLS is a multipoint architecture that connects two or more customer devices using Ethernet bridging techniques over an MPLS network. In VPLS, the P-network emulates an IEEE 802.1D Ethernet bridge, with each EMS being analogous to a VLAN. VPLS is an architecture that is still being defined. There are two RFCs that are distinct and incompatible with one another: • RFC 4761: Virtual Private LAN Service (VPLS). Using BGP for Auto-Discovery and Signaling is a standard proposed by Juniper • RFC 4762: Virtual Private LAN Service (VPLS). Using Label Distribution Protocol (LDP) Signaling is a standard proposed by Cisco One of the major differences in the standard is in the VPLS PE discovery process, or how VPLS PE devices find each other, communicate capabilities, and perform tasks such as preprovisioning EVCs.”
“VPLS Architecture Model In the VPLS architecture model, UPE devices act as IEEE 802.1D standard bridges or switches. They are interconnected in a full mesh of PWs. In Figure 4-11, the PWs cross a routed MPLS and IP provider backbone. From the point of view of the UPEs, these PWs are just Ethernet connections to another switch.”
Cisco Systems, Inc. Virtual Private LAN Services (VPLS) Introduction at http://www.cisco.com/en/US/products/ps6648/products_ios_protocol_option_home.html
– Tiso, John (2011-10-31). Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide: (CCDP ARCH 642-874) (3rd Edition) (Foundation Learning Guides) (Kindle Locations 4279-4284). Pearson Education. Kindle Edition.