公开(公告)号：US20030142674A1

公开(公告)日：2003-07-31

申请号：US10265621

申请日：2002-10-08

Applicant: NORTEL NETWORKS LIMITED

Inventor： Liam Casey

IPC: H04L012/56

CPC classification number: H04L45/502 ,  H04L12/4633 ,  H04L12/4641

Abstract: A network can be organized for providing virtual private LAN segment (VPLS) services to customers into a network core and an associated number of logical provider edges. Each logical provider edge is partitioned into a plurality of Edge-PEs and a Core-PE. Customers connect to the Edge-PE. The Edge-PE maintains a context (a virtual bridge) for each customer VPLS it serves, VPLS service is realized by a full mesh of so called virtual circuit (VC) tunnels between virtual bridge ports. Each VC tunnel is identified by 3 VC labels in each direction, the first label is used in the encapsulation of customer traffic from the ingress Edge-PE to the ingress Core-PE, the second from ingress Core-PE to egress Core-PE and the third from egress Core-PE to Egress Edge-PE. The mechanisms for the allocation of the label values to and how the label values are used provide a realization of VPLS service that is scalable and easy to administer.

Abstract translation: 可以组织网络以向客户提供虚拟专用LAN段（VPLS）服务到网络核心和相关数量的逻辑提供商边缘。 每个逻辑提供商边缘被分割成多个Edge-PE和Core-PE。 客户连接到Edge-PE。 Edge-PE为其服务的每个客户VPLS维护上下文（虚拟桥），VPLS服务通过虚拟桥端口之间所谓的虚拟电路（VC）隧道的完整网格来实现。 每个VC隧道在每个方向由3个VC标签标识，第一个标签用于封装从入口Edge-PE到入口Core-PE的客户流量，第二个标签用于从入口Core-PE到出口Core-PE的第二个， 从出口Core-PE到出口边缘PE的第三个。 标签值分配的机制以及如何使用标签值提供可扩展且易于管理的VPLS服务的实现。