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