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1. 发明授权

US07697416B2 Constructing a repair path in the event of non-availability of a routing domain 有权
标题翻译：在路由域不可用的情况下构建修复路径
公开(公告)号：US07697416B2
公开(公告)日：2010-04-13
申请号：US11518382
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
IPC分类号： H04L1/00 , H04L12/26 , H04L12/28 , H04L12/56
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： In one embodiment, an apparatus and method are described for constructing a repair path in the event of non-availability of a routing domain component of a routing domain comprising, as components, links and nodes. The apparatus is arranged to receive respective network repair addresses from each of the far-side and near-side advertising node for use in the event of non-availability of a routing domain component between the advertising node. The apparatus is further arranged to advertise the near-side advertising node network repair address to one or more far-side nodes via a path external to the routing domain.
摘要翻译：在一个实施例中，描述了在路由域的路由域组件的不可用性的情况下构建修复路径的装置和方法，该路由域组件包括作为组件的链路和节点。该装置被安排为从广播节点和广播节点之间的路由域组件不可用的情况下接收来自远侧和近侧广告节点的相应网络修复地址。该装置还被布置成经由路由域外部的路径将近侧广告节点网络修复地址通告给一个或多个远侧节点。

2. 发明授权

US07957306B2 Providing reachability information in a routing domain of an external destination address in a data communications network 有权
标题翻译：在数据通信网络中的外部目的地地址的路由域中提供可达性信息
公开(公告)号：US07957306B2
公开(公告)日：2011-06-07
申请号：US11518383
申请日：2006-09-08
申请人： Stewart F. Bryant , Mike Shand , Gargi Nalawade , Robert Raszuk , Keyur Patel , David D. Ward , Clarence Filsfils , Stefano B. Previdi
发明人： Stewart F. Bryant , Mike Shand , Gargi Nalawade , Robert Raszuk , Keyur Patel , David D. Ward , Clarence Filsfils , Stefano B. Previdi
IPC分类号： H04L12/26 , H04L12/66 , G06F15/16
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/28
摘要： An apparatus for providing reachability in a routing domain of a data communications network having as components nodes and links therebetween for a routing domain external destination address is provided. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with the internal advertisement of the destination address reachability.
摘要翻译：提供了一种用于在数据通信网络的路由域中提供可达性的装置，其具有用于路由域外部目的地地址的节点和链路之间的组件。该设备被布置为在路由域中的节点内部向目的地址可达性通告，并将可达性类别与目的地址可达性的内部广告相关联。

3. 发明申请

US20080062986A1 Providing reachability information in a routing domain of an external destination address in a data communications network 有权
标题翻译：在数据通信网络中的外部目的地地址的路由域中提供可达性信息
公开(公告)号：US20080062986A1
公开(公告)日：2008-03-13
申请号：US11518383
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Clarence Filsfils , Stefano B. Previdi , Robert Raszuk
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Clarence Filsfils , Stefano B. Previdi , Robert Raszuk
IPC分类号： H04L12/56
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/28
摘要： An apparatus for providing reachability in a routing domain of a data communications network having as components nodes and links therebetween for a routing domain—external destination address is described. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with said internal advertisement of said destination address reachability.
摘要翻译：描述了一种用于在数据通信网络的路由域中提供可达性的装置，其具有用于路由域 - 外部目的地地址之间的节点和链路之间的组件。该装置被布置为在内部向路由域中的节点通告目的地址可达性，并将可达性类别与所述目的地址可达性的所述内部广告相关联。

4. 发明申请

US20080062861A1 Constructing a repair path in the event of non-availability of a routing domain 有权
标题翻译：在路由域不可用的情况下构建修复路径
公开(公告)号：US20080062861A1
公开(公告)日：2008-03-13
申请号：US11518382
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
IPC分类号： H04J3/14
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： In one embodiment, an apparatus and method are described for constructing a repair path in the event of non-availability of a routing domain component of a routing domain comprising, as components, links and nodes. The apparatus is arranged to receive respective network repair addresses from each of the far-side and near-side advertising node for use in the event of non-availability of a routing domain component between the advertising node. The apparatus is further arranged to advertise the near-side advertising node network repair address to one or more far-side nodes via a path external to the routing domain.
摘要翻译：在一个实施例中，描述了在路由域的路由域组件的不可用性的情况下构建修复路径的装置和方法，该路由域组件包括作为组件的链路和节点。该装置被安排为从广播节点和广播节点之间的路由域组件不可用的情况下接收来自远侧和近侧广告节点的相应网络修复地址。该装置还被布置成经由路由域外部的路径将近侧广告节点网络修复地址通告给一个或多个远侧节点。

5. 发明授权

US08111616B2 Constructing a repair path in the event of failure of an inter-routing domain system link 有权
标题翻译：在路由间域网系统链路故障的情况下构建修复路径
公开(公告)号：US08111616B2
公开(公告)日：2012-02-07
申请号：US11518405
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , Gargi Nalawade , Robert Raszuk , Keyur Patel , Stefano B. Previdi , David D. Ward
发明人： Mike Shand , Stewart F. Bryant , Gargi Nalawade , Robert Raszuk , Keyur Patel , Stefano B. Previdi , David D. Ward
IPC分类号： G01R31/08 , G06F11/00
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28
摘要： An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.
摘要翻译：描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

6. 发明申请

US20080219153A1 Constructing a repair path in the event of failure of an inter-routing domain system link 有权
标题翻译：在路由间域网系统链路故障的情况下构建修复路径
公开(公告)号：US20080219153A1
公开(公告)日：2008-09-11
申请号：US11518405
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Stefano B. Previdi , Robert Raszuk
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Stefano B. Previdi , Robert Raszuk
IPC分类号： G01R31/08
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28
摘要： An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.
摘要翻译：描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

7. 发明授权

US07864669B2 Method of constructing a backup path in an autonomous system 有权
标题翻译：在自治系统中构建备份路径的方法
公开(公告)号：US07864669B2
公开(公告)日：2011-01-04
申请号：US11254587
申请日：2005-10-20
申请人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David D. Ward , John Galen Scudder , Stefano B. Previdi , Ian Michael Charles Shand , Gargi Nalawade
发明人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David D. Ward , John Galen Scudder , Stefano B. Previdi , Ian Michael Charles Shand , Gargi Nalawade
IPC分类号： H04L12/26
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28 , H04L2212/00
摘要： A method of constructing a backup path in an autonomous system (AS) for failure of an inter-AS link is described. The method comprises identifying an alternate inter-AS path and constructing a tunnel to an end point on the alternate path.
摘要翻译：描述了在自治系统（AS）中构建用于AS间链路故障的备用路径的方法。该方法包括识别替代的AS间路径并构建到备用路径上的终点的隧道。

8. 发明授权

US07961600B2 Loop prevention technique for MPLS using service labels 有权
标题翻译：使用服务标签的MPLS环路防护技术
公开(公告)号：US07961600B2
公开(公告)日：2011-06-14
申请号：US12694038
申请日：2010-01-26
申请人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
发明人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
IPC分类号： H04L12/26
CPC分类号： H04L45/18 , H04L45/04 , H04L45/22 , H04L45/28 , H04L45/50
摘要： In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.
摘要翻译：在一个实施例中，在计算机网络的第一边缘设备和相邻路由域之间检测到通信丢失。在第一边缘设备处接收数据分组，其中所接收的数据分组包含经由相邻路由域可到达的目的地地址。确定服务标签是否位于包含在所接收的数据分组中的多协议标签交换（MPLS）标签栈中。 MPLS标签堆栈中的服务标签表示接收到的数据包是根据快速重路由（FRR）操作先前重新路由的。响应于接收到的数据分组在MPLS标签堆栈中不包括服务标签的确定，所接收的数据分组被重新路由到计算机网络的第二边缘设备以转发到相邻路由域。

9. 发明申请

US20100118732A1 LOOP PREVENTION TECHNIQUE FOR MPLS USING SERVICE LABELS 有权
标题翻译：使用服务标签的MPLS环路预防技术
公开(公告)号：US20100118732A1
公开(公告)日：2010-05-13
申请号：US12694038
申请日：2010-01-26
申请人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
发明人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L45/18 , H04L45/04 , H04L45/22 , H04L45/28 , H04L45/50
摘要： In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.
摘要翻译：在一个实施例中，在计算机网络的第一边缘设备和相邻路由域之间检测到通信丢失。在第一边缘设备处接收数据分组，其中所接收的数据分组包含经由相邻路由域可到达的目的地地址。确定服务标签是否位于包含在所接收的数据分组中的多协议标签交换（MPLS）标签栈中。 MPLS标签堆栈中的服务标签表示接收到的数据包是根据快速重路由（FRR）操作先前重新路由的。响应于接收到的数据分组在MPLS标签堆栈中不包括服务标签的确定，所接收的数据分组被重新路由到计算机网络的第二边缘设备以转发到相邻路由域。

10. 发明授权

US07664013B2 Loop prevention technique for MPLS using service labels 有权
标题翻译：使用服务标签的MPLS环路防护技术
公开(公告)号：US07664013B2
公开(公告)日：2010-02-16
申请号：US11068081
申请日：2005-02-28
申请人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
发明人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
IPC分类号： H04L12/26
CPC分类号： H04L45/18 , H04L45/04 , H04L45/22 , H04L45/28 , H04L45/50
摘要： A local fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. The backup edge device identifies protected data packets as those which contain a predetermined “service” label in their MPLS label stacks. In other words, the service label is used as an identifier for packets that have been FRR rerouted. Upon receiving a data packet containing a service label, the backup edge device is not permitted to reroute the packet a second time, e.g., in response to another inter-domain node or link failure, thereby preventing loops from developing at the edge of the network.
摘要翻译：本地快速重路由（FRR）技术在计算机网络的边缘实现。根据该技术，如果边缘设备检测到阻止其与相邻路由域通信的节点或链路故障，则边缘设备将至少一些寻址到该域的数据分组重新路由到备用边缘设备，将数据包转发到相邻域。重新路由的数据包在被转发到备份边缘设备之前被指定为“保护”（即重新路由）数据分组。备份边缘设备将受保护的数据包标识为在其MPLS标签堆栈中包含预定“服务”标签的数据包。换句话说，服务标签被用作已被FRR重新路由的数据包的标识符。在接收到包含服务标签的数据分组时，不允许备份边缘设备第二次重新路由该分组，例如响应于另一个域间节点或链路故障，从而防止在网络边缘发展的环路。

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