1. Pseudowire Edge to Edge Emulation FROM THE SERVICE PROVIDER POINT OF VIEW gilles.deworm@ebone.com

2. Drivers For PWE3/L2TPv3 (1)  Adding to the product portfolio a service that emulates “circuit-like” connections over a single or multiple (inter-AS) IP networks for Point-To-Point circuits or Point-To-Multipoint circuits  Having a performing and flexible toolbox for building customized solutions in the case of conflicting routing policies requirements:  open versus closed peering networks  regional/national vs. hosting vs. international transit backbone policies

3. Drivers For PWE3/L2TPv3 (2)  Interconnecting at high-speed physically disjoint network parts by building a “network based overlay” architecture.  Provide a mean for interconnecting Ethernet networks transparently.

4. Service Provider Requirements  Transparency  No change to the routing architecture  No new IP protocol implementation  Run over “plain” IP  High-speed capable  from T1/E1/E3/T3 to OC48  High performance  Hardware assisted (server card) for high BW  Flexible  In terms of payload capability: Layer 2: PPP,HDLC,FR,ATM,ETHERNET

5. Service Provider Requirements  Easy and quick service provisioning  Secure  Solution: Simple Security with Tunnel ID/Key vs. IPSec capable  Scalable  need for automatically/auto-magically tunnels setup  Minimum overhead  Tunnel Header: 4-12 bytes  Takes benefit of the statistical multiplexing of the IP networks

6. Services Overview – IP VLL (1)  Service 1: IP Virtual Leased Line  Emulation of HDLC, PPP, FR, ATM, Ethernet End-to-End interconnectivity  Transport of Layer 2 packets End-to- End  Point-To-Point  Single Virtual Leased Line/physical interface  One-to-One mapping: 1 tunnel bound to the interface

7. Services Overview – IP VLL (2)

8. Services Overview – IP VLL (3)  Examples:  Lan To Lan (L2L) interconnection aka. Transparent Lan Service (TLS)  Replacement of clear channel SDH Finer granularity in bandwidth (combined with existing IP rate-limiting tools)  Interconnection of 2 disjoint networks at high-speed  Layer 2 backhaul to a remote location Virtual presence at IX (no need for expensive LL)

9. Services overview–IP MVLL (1)  Point-To-Multipoint  Multiple Virtual Leased Lines/physical interface  Multiple tunnels with DLCI/802.1Q/[VPI/VCI] mapping to the corresponding sub-interface on the single physical interconnection

10. Services overview–IP MVLL (2)

11. Services overview–IP MVLL (3)  L2 PPVPN (Provider Provisioned Virtual Private Network). Different topologies: Hub-and-Spoke,Partial/Fully Mesh Single Interconnection/site Customer manage Routing and QoS Tunnels provisioned by the Provider: “Network based tunneling”

12. Services overview–IP MVLL (4)

13. Services overview–IP MVLL (5)  Overlay network Goal: The network D in the middle does not need to know about the routing in the other disjoint networks and has a different BGP/routing policy (more restricted for instance) To scale one transit backbone Superset and subset of routes Open versus closed peering policy Closed User Group (GRX ) Distributed IX

14. Services overview–IP MVLL (6)

15. Services overview–IP MVLL (7)  Premium Service Goal: bundle different services on a single interface. Examples: a) Transit connectivity + multiple direct connectivity to regional peering b) L2PPVPN + Internet Break-out + Managed Hosting/Housing Services

16. Services overview–IP MVLL (8)

17. Other Services (1)  Metro TLS (Transparent LAN Services) Interconnection of LANs in the Metro Area Break-out to remote MANs, Internet, CUG (intranet/extranet), etc.

18. Other Services (2)

19. Other Services (3)  Multi-services devices: On same the router, connect:  L2 PPVPN customers  L2 Backhaul service  IP transit  Inter-Connectivity to different networks (regional/national) with different routing policies  Premium service with different QoS requirements  VLAN rewriting/stripping

20. VLAN rewriting/stripping

21. Future (1)  Control plane for the forwarding plane  Enhanced security  Automatically tunnel setup  L2/L3 (dissimilar endpoints framing)  L3/L3 (similar to GRE) Tips:  MTU at endpoint interconnections no support for fragmentation)  ISIS hello padding  disable it or set correct MTU at the edge Conclusion: PWE3/L2TPv3 is a high performance transparent encapsulation protocol optimized for the encapsulation of one protocol (L2&L3)over IP. No change to the network is required (runs over IPv4).

22. Conclusion PWE3/L2TPv3 is a high performance transparent encapsulation protocol optimized for the encapsulation of one protocol (L2&L3)over IP. No change to the network is required (runs over IPv4).