VPLS

• Enables carriers to bring various WAN connections (IP or MPLS) together in a single logical ethernet network
• Allows MPLS networks to provide multipoint ethernet services
• Allow CE nodes to communicate directly with other CE nodes
• Ethernet Bridges – Pseudo-Wires (PW)
• Forwards frames at L2
• Self-learn source MAC address to port and frames are forwarded based on destination MAC address
  • If MAC is unknown, broadcast or multicast is flooded out all ports associated with virtual bridge
• Architecture must perform
  • Auto discover other PE’s associated with the VPLS instance
  • Signaling of PWs to interconnect VPLS virtual Switch Instance (VSI)
  • Loop avoidance
  • MAC address withdrawal

Metro-Ethernet

• • Separated into different subsections
  • Port-based
  • Per-vlan
  • Per-class per-vlan

Point-to-point

Simple:

Ethernet private line (EPL) (for example, Ethernet mapped to SONET/SDH frames) or Ethernet Internet access with IPsec encryption (no split tunnel)

Trunked:

Ethernet Virtual Private Line (EVPL), also called Ethernet Relay Service (ERS)

Multipoint

Simple:

Ethernet Internet access with multipoint DMVPN or MPLS Ethernet access to group encrypted transport (GET)

Trunked:

Ethernet Relay Multipoint Service (ERMS) or Ethernet Multipoint Service (EMS)

Carrier Ethernet Services

• Ethernet Virtual Private Line – E-LINE

  • Connect 2 customer ethernet ports over a WAN
  • Ethernet Private Line (EPL)
    • Provide p2p ethernet virtual connection (EVC) between a pair of user network interfaces (UNIs)
    • High degree of transparency
  • ○ Ethernet Virtual Private Line (EVPL)
    • Provide p2p or p2m between a pair of UNIs

• Ethernet Virtual Private LAN – E-LAN

  • Multipoint service connecting sets of customer endpoints
  • Appearance of a bridged ethernet connecting the sites

• Ethernet Virtual Private Tree – E-TREE

  • Multipoint service connecting one or more root to a set of leaves