公开(公告)号：US07583593B2

公开(公告)日：2009-09-01

申请号：US11001149

申请日：2004-12-01

申请人： James N. Guichard ,  Jean-Philippe Vasseur ,  Thomas D. Nadeau ,  Clarence A. M. Filsfils ,  David D. Ward ,  Stefano Previdi

发明人： James N. Guichard ,  Jean-Philippe Vasseur ,  Thomas D. Nadeau ,  Clarence A. M. Filsfils ,  David D. Ward ,  Stefano Previdi

IPC分类号： G01R31/08 ,  H04L12/26

CPC分类号： H04L45/22 ,  H04L41/0677 ,  H04L43/50 ,  H04L45/02 ,  H04L45/28

摘要： A path verification protocol (PVP) which enumerates a series of messages sent to a set of nodes, or routers, along a suspected path identifies forwarding plane problems for effecting changes at the control plane level. The messages include a command requesting interrogation of a further remote node for obtaining information about the path between the node receiving the PVP message and the further remote node. The node receiving the PVP message replies with a command response indicative of the outcome of attempts to reach the further remote node. The series of messages collectively covers a set of important routing points along a path from the originator to the recipient. The aggregate command responses to the series of PVP messages is analyzed to identify not only whether the entire path is operational, but also the location and nature of the problem.

摘要翻译： 列出沿着可疑路径发送到一组节点或路由器的一系列消息的路径验证协议（PVP）识别用于在控制平面级别实现改变的转发平面问题。 消息包括请求询问另一个远程节点以获取关于接收PVP消息的节点与另外的远程节点之间的路径的信息的命令。 接收PVP消息的节点用指示响应到达远程节点的结果的命令响应来回复。 一系列消息共同地涵盖沿着始发者到接收者的路径的一组重要的路由点。 对一系列PVP消息的聚合命令响应进行分析，不仅可以识别整个路径是否可操作，还可以确定问题的位置和性质。

公开(公告)号：US07505402B2

公开(公告)日：2009-03-17

申请号：US11159719

申请日：2005-06-23

申请人： Clarence A. M. Filsfils ,  James N. Guichard ,  Robert Raszuk ,  Jean-Philippe Vasseur ,  Kris Michielsen ,  Peter De Vriendt

发明人： Clarence A. M. Filsfils ,  James N. Guichard ,  Robert Raszuk ,  Jean-Philippe Vasseur ,  Kris Michielsen ,  Peter De Vriendt

IPC分类号： G06F11/00 ,  G01R31/08 ,  H04L12/56

CPC分类号： H04L12/66 ,  H04L41/0668 ,  H04L45/02 ,  H04L45/023 ,  H04L45/04 ,  H04L45/22 ,  H04L45/24 ,  H04L45/28 ,  H04L45/36 ,  H04L45/58

摘要： A method, apparatus and computer program product for providing convergence for a dual-homed site in a network is presented. An occurrence of a failure between a first Provider Edge (PE) device and a first Customer Edge (CE) device in communication with a dual-homed site is detected. A determination is made whether an alternate route exists for the dual-homed site in a routing table associated with the first PE device. When an alternate route exists then a routing entry associated with the first CE device in a routing table of said first PE device is kept from being deleted for a predetermined amount of time, the routing table is modified to reference the alternate route, the routing entry is rewritten to perform a POP and lookup in a VRF table of the first PE device, and the routing entry is deleted after the predetermined amount of time has elapsed.

摘要翻译： 提出了一种用于为网络中的双归位点提供融合的方法，装置和计算机程序产品。 检测到与双归位置通信的第一提供商边缘（PE）设备和第一客户边缘（CE）设备之间的故障的发生。 确定在与第一PE设备相关联的路由表中是否存在用于双归属站点的备用路由。 当存在替代路由时，在所述第一PE设备的路由表中与第一CE设备相关联的路由条目不被删除预定的时间量，所述路由表被修改以引用所述替代路由，所述路由条目 被重写以在第一PE设备的VRF表中执行POP和查找，并且在经过预定时间量之后删除路由条目。