公开(公告)号：US20130051224A1

公开(公告)日：2013-02-28

申请号：US13661529

申请日：2012-10-26

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Francois Le Faucheur ,  Anna Charny

IPC: H04L12/28 ,  H04L29/14

CPC classification number: H04L45/00 ,  H04L12/4633 ,  H04L12/5691 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

Abstract: In one embodiment, a set of tunnels is determined that traverse a particular link connected to an intermediate node in a network. The intermediate node computes, in a coordinated path computation, paths for tunnels of the set of tunnels that do not include the particular link. The coordinated path computation considers each of the tunnels of the set of tunnels. The intermediate node selects one or more tunnels of the set of tunnels for preemption. The one or more tunnels are selected as tunnels that are reroutable by respective head-end nodes of the one or more other tunnels. Notifications are sent to one or more other intermediate nodes that inform the one or more other intermediate nodes of the one or more tunnels selected for preemption.

Abstract translation: 在一个实施例中，确定穿过连接到网络中的中间节点的特定链路的一组隧道。 中间节点在协调路径计算中计算不包括特定链路的隧道组的隧道的路径。 协调路径计算考虑隧道组中的每个隧道。 中间节点选择该组隧道中的一个或多个隧道进行抢占。 一个或多个隧道被选择为可由一个或多个其他隧道的相应头端节点重新路由的隧道。 通知被发送到一个或多个其他中间节点，其通知一个或多个其他中间节点选择用于抢占的一个或多个隧道。

公开(公告)号：US10721158B2

公开(公告)日：2020-07-21

申请号：US15690107

申请日：2017-08-29

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Alton Lo ,  Anna Charny

IPC: H04L12/703

Abstract: In one embodiment, a primary tunnel is established from a head-end node to a destination along a path including one or more protected network elements for which a fast reroute path is available to pass traffic around the one or more network elements in the event of their failure. A first path quality measures path quality prior to failure of the one or more protected network elements. A second path quality measures path quality subsequent to failure of the one or more protected network elements, while the fast reroute path is being used to pass traffic of the primary tunnel. A determination is made whether to reestablish the primary tunnel over a new path that does not include the one or more failed protected network elements, or to continue to utilize the path with the fast reroute path, in response to a difference between the first path quality and the second path quality.

公开(公告)号：US20180006932A1

公开(公告)日：2018-01-04

申请号：US15690107

申请日：2017-08-29

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Alton Lo ,  Anna Charny

IPC: H04L12/703 ,  H04L12/707 ,  H04J3/14 ,  H04L12/46 ,  H04L12/773 ,  H04L12/723

Abstract: In one embodiment, a primary tunnel is established from a head-end node to a destination along a path including one or more protected network elements for which a fast reroute path is available to pass traffic around the one or more network elements in the event of their failure. A first path quality measures path quality prior to failure of the one or more protected network elements. A second path quality measures path quality subsequent to failure of the one or more protected network elements, while the fast reroute path is being used to pass traffic of the primary tunnel. A determination is made whether to reestablish the primary tunnel over a new path that does not include the one or more failed protected network elements, or to continue to utilize the path with the fast reroute path, in response to a difference between the first path quality and the second path quality.

公开(公告)号：US09774523B2

公开(公告)日：2017-09-26

申请号：US14537772

申请日：2014-11-10

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Alton Lo ,  Anna Charny

IPC: H04L12/703 ,  H04J3/14 ,  H04L12/46 ,  H04L12/707 ,  H04L12/723 ,  H04L12/773

CPC classification number: H04L45/28 ,  H04J3/14 ,  H04L12/4633 ,  H04L45/22 ,  H04L45/50 ,  H04L45/60

Abstract: In one embodiment, a primary tunnel is established from a head-end node to a destination along a path including one or more protected network elements for which a fast reroute path is available to pass traffic around the one or more network elements in the event of their failure. A first path quality measures path quality prior to failure of the one or more protected network elements. A second path quality measures path quality subsequent to failure of the one or more protected network elements, while the fast reroute path is being used to pass traffic of the primary tunnel. A determination is made whether to reestablish the primary tunnel over a new path that does not include the one or more failed protected network elements, or to continue to utilize the path with the fast reroute path, in response to a difference between the first path quality and the second path quality.

公开(公告)号：US20150063093A1

公开(公告)日：2015-03-05

申请号：US14537772

申请日：2014-11-10

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Alton Lo ,  Anna Charny

IPC: H04L12/703 ,  H04L12/46

CPC classification number: H04L45/28 ,  H04J3/14 ,  H04L12/4633 ,  H04L45/22 ,  H04L45/50 ,  H04L45/60

Abstract: In one embodiment, a primary tunnel is established from a head-end node to a destination along a path including one or more protected network elements for which a fast reroute path is available to pass traffic around the one or more network elements in the event of their failure. A first path quality measures path quality prior to failure of the one or more protected network elements. A second path quality measures path quality subsequent to failure of the one or more protected network elements, while the fast reroute path is being used to pass traffic of the primary tunnel. A determination is made whether to reestablish the primary tunnel over a new path that does not include the one or more failed protected network elements, or to continue to utilize the path with the fast reroute path, in response to a difference between the first path quality and the second path quality.

Abstract translation: 在一个实施例中，沿着包括一个或多个受保护网络的路径的头端节点到目的地建立主隧道，对于该隧道，快速重路由路径可用于在一个或多个网络元件周围传送流量 他们的失败 第一路径质量在一个或多个受保护的网络元件故障之前测量路径质量。 第二路径质量测量在一个或多个受保护网络元件故障之后的路径质量，而快速重路由路径被用于传递主隧道的业务。 确定是否通过不包括一个或多个失败的受保护网络元件的新路径重新建立主隧道，或者响应于第一路径质量之间的差异来继续利用具有快速重路由路径的路径 和第二条路径质量。

公开(公告)号：US08767532B2

公开(公告)日：2014-07-01

申请号：US13661529

申请日：2012-10-26

Applicant: Cisco Technology, Inc.

Inventor： Jean-Philippe Vasseur ,  Francois Le Faucheur ,  Anna Charny

IPC: H04L12/26

CPC classification number: H04L45/00 ,  H04L12/4633 ,  H04L12/5691 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

Abstract: In one embodiment, a set of tunnels is determined that traverse a particular link connected to an intermediate node in a network. The intermediate node computes, in a coordinated path computation, paths for tunnels of the set of tunnels that do not include the particular link. The coordinated path computation considers each of the tunnels of the set of tunnels. The intermediate node selects one or more tunnels of the set of tunnels for preemption. The one or more tunnels are selected as tunnels that are reroutable by respective head-end nodes of the one or more other tunnels. Notifications are sent to one or more other intermediate nodes that inform the one or more other intermediate nodes of the one or more tunnels selected for preemption.

Abstract translation: 在一个实施例中，确定穿过连接到网络中的中间节点的特定链路的一组隧道。 中间节点在协调路径计算中计算不包括特定链路的隧道组的隧道的路径。 协调路径计算考虑隧道组中的每个隧道。 中间节点选择该组隧道中的一个或多个隧道进行抢占。 一个或多个隧道被选择为可由一个或多个其他隧道的相应头端节点重新路由的隧道。 通知被发送到一个或多个其他中间节点，其通知一个或多个其他中间节点选择用于抢占的一个或多个隧道。