公开(公告)号：US07733856B2

公开(公告)日：2010-06-08

申请号：US10891546

申请日：2004-07-15

Applicant: Thippanna Hongal ,  Prashanth Ishwar ,  Rahul S. Kasralikar ,  John Rigby ,  Krishna Sankaran ,  Ramanaravanan Ramakrishnan

Inventor： Thippanna Hongal ,  Prashanth Ishwar ,  Rahul S. Kasralikar ,  John Rigby ,  Krishna Sankaran ,  Ramanaravanan Ramakrishnan

IPC: H04L12/56

CPC classification number: H04L12/4675 ,  H04L12/462 ,  H04L43/10 ,  H04L49/555

Abstract: Path information is obtained in a VPLS-based network by generating special Layer 2 frames (referred to herein as “trace-request frames”), performing source MAC filtering to identify the trace-request frames, and generating a special frame (referred to herein as a “trace-reply frame”) when the source MAC filtering identifies a trace-request frame. Upon identifying a trace-request frame, path information is collected and embedded into the trace-reply frame. The trace-reply frame is then sent to the originating node where the path information is used to learn the path that the trace-request frame traversed. By sending multiple trace-request frames with different source MAC addresses, path information received from source MAC filtering at different nodes in the VPLS-based network can be collected and used to learn an entire path of interest.

Abstract translation: 通过生成特殊的第2层帧（这里称为“跟踪请求帧”），执行源MAC过滤以识别跟踪请求帧并生成特殊帧（在本文中称为），在基于VPLS的网络中获得路径信息 作为“跟踪回复帧”），当源MAC过滤标识跟踪请求帧时。 在识别跟踪请求帧之后，路径信息被收集并嵌入跟踪回复帧。 然后将跟踪回复帧发送到始发节点，其中使用路径信息来学习跟踪请求帧所经过的路径。 通过发送具有不同源MAC地址的多个跟踪请求帧，可以收集用于基于VPLS的网络中的不同节点处的源MAC过滤接收的路径信息，并用于学习整个感兴趣的路径。