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1. 发明授权

US08619773B2 Service request packet including an exterior network protocol attribute 有权
标题翻译：服务请求包，包括外部网络协议属性
公开(公告)号：US08619773B2
公开(公告)日：2013-12-31
申请号：US12846811
申请日：2010-07-29
申请人： Clarence Filsfils , Cedell Adam Alexander, Jr. , Jim Guichard
发明人： Clarence Filsfils , Cedell Adam Alexander, Jr. , Jim Guichard
IPC分类号： H04L12/28
CPC分类号： H04L45/30 , H04L45/42 , H04L67/28
摘要： Packets are encapsulated and sent from a service node to one or more application nodes for applying one or more Layer-4 to Layer-7 services to the packets. Before which for a packet, the service node performs a lookup operation based on a destination address of the packet in a routing data structure derived from a exterior network protocol, such as, but not limited to Border Gateway Protocol (BGP). This lookup operation results in the identification of a next hop packet switching device to which the packet would be sent from the service node. The service node includes this identification of the next hop address in the request packet sent to the application node(s). After the service(s) are applied to the packet, an application node will send the services-applied packet to this next hop address. In this manner, application nodes do not need to run an exterior network protocol. Although, they typically will run an Interior Gateway Protocol for identifying how to forward packets to the next hop address.
摘要翻译：分组被封装并从服务节点发送到一个或多个应用节点，以将一个或多个第4层到第7层服务应用于分组。在分组之前，服务节点基于来自外部网络协议（例如但不限于边界网关协议（BGP））的路由数据结构中的分组的目的地地址来执行查找操作。该查找操作导致从服务节点发送分组的下一跳分组交换设备的标识。服务节点包括发送到应用节点的请求分组中的下一跳地址的标识。应用程序节点将该服务应用于数据包后，将将应用服务的数据包发送到下一跳地址。以这种方式，应用节点不需要运行外部网络协议。虽然，它们通常将运行内部网关协议，用于识别如何将数据包转发到下一跳地址。

2. 发明申请

US20120027016A1 Service Request Packet Including an Exterior Network Protocol Attribute 有权
标题翻译：包括外部网络协议属性的服务请求数据包
公开(公告)号：US20120027016A1
公开(公告)日：2012-02-02
申请号：US12846811
申请日：2010-07-29
申请人： Clarence Filsfils , Cedell Adam Alexander, JR. , Jim Guichard
发明人： Clarence Filsfils , Cedell Adam Alexander, JR. , Jim Guichard
IPC分类号： H04L12/56
CPC分类号： H04L45/30 , H04L45/42 , H04L67/28
摘要： Packets are encapsulated and sent from a service node to one or more application nodes for applying one or more Layer-4 to Layer-7 services to the packets. Before which for a packet, the service node performs a lookup operation based on a destination address of the packet in a routing data structure derived from a exterior network protocol, such as, but not limited to Border Gateway Protocol (BGP). This lookup operation results in the identification of a next hop packet switching device to which the packet would be sent from the service node. The service node includes this identification of the next hop address in the request packet sent to the application node(s). After the service(s) are applied to the packet, an application node will send the services-applied packet to this next hop address. In this manner, application nodes do not need to run an exterior network protocol. Although, they typically will run an Interior Gateway Protocol for identifying how to forward packets to the next hop address.
摘要翻译：分组被封装并从服务节点发送到一个或多个应用节点，以将一个或多个第4层到第7层服务应用于分组。在分组之前，服务节点基于来自外部网络协议（例如但不限于边界网关协议（BGP））的路由数据结构中的分组的目的地地址来执行查找操作。该查找操作导致从服务节点发送分组的下一跳分组交换设备的标识。服务节点包括发送到应用节点的请求分组中的下一跳地址的标识。应用程序节点将该服务应用于数据包后，将将应用服务的数据包发送到下一跳地址。以这种方式，应用节点不需要运行外部网络协议。虽然，它们通常将运行内部网关协议，用于识别如何将数据包转发到下一跳地址。

3. 发明授权

US09300579B2 Packet metadata channels carrying infrastructure metadata in networks 有权
标题翻译：在网络中携带基础设施元数据的数据包元数据信道
公开(公告)号：US09300579B2
公开(公告)日：2016-03-29
申请号：US13863013
申请日：2013-04-15
申请人： Daniel C. Frost , Simon James Trevor Spraggs , Rex Emmanuel Fernando , Stewart Frederick Bryant , Jim Guichard , Carlos M. Pignataro , Clarence Filsfils
发明人： Daniel C. Frost , Simon James Trevor Spraggs , Rex Emmanuel Fernando , Stewart Frederick Bryant , Jim Guichard , Carlos M. Pignataro , Clarence Filsfils
IPC分类号： H04L12/26 , H04L12/741 , H04L12/723
CPC分类号： H04L45/74 , H04L45/50
摘要： In one embodiment, an apparatus in a network determines particular metadata to communicate infrastructure information associated with a particular packet to another apparatus in the network. The apparatus sends into the network the particular packet including a metadata channel, comprising said particular metadata, external to the payload of the particular packet. Examples of infrastructure metadata carried in a packet include, but are not limited to, information defining service chaining for processing of the packet, contextual information for processing of the packet, specific handling instructions of the packet, and operations, maintenance, administration (OAM) instrumentation of the packet.
摘要翻译：在一个实施例中，网络中的装置确定特定元数据以将与特定分组相关联的基础设施信息传送到网络中的另一装置。该装置向该网络发送包括特定数据包的有效载荷之外的包括所述特定元数据的元数据信道的特定数据包。在分组中携带的基础架构元数据的示例包括但不限于定义用于处理分组的服务链接的信息，用于处理分组的上下文信息，分组的特定处理指令以及操作，维护，管理（OAM）数据包的检测。

4. 发明授权

US07983153B2 Fast reroute (FRR) protection at the edge of a RFC 2547 network 有权
标题翻译：在RFC 2547网络边缘的快速重路由（FRR）保护
公开(公告)号：US07983153B2
公开(公告)日：2011-07-19
申请号：US12481411
申请日：2009-06-09
申请人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
发明人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
IPC分类号： H04J1/16 , H04J3/14 , H04L1/00 , H04L12/26
CPC分类号： H04L45/28 , H04L45/02 , H04L45/04 , H04L45/22 , H04L45/50
摘要： In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.
摘要翻译：在一个实施例中，第一路由域中的边缘设备被配置为经由数据链路与第二路由域进行通信。边缘设备接收包含经由第二路由域可到达的目的地地址的数据分组，以及指示数据分组是先前通过多协议标签交换在第一路由域中从另一边缘设备重新路由的受保护分组的指示（MPLS）快速重路由（FRR）备份路径。边缘设备确定与第二路由域的通信是否仍然通过数据链路可用，如果是，则删除数据分组是受保护分组的指示，并将数据分组转发到第二路由域，如果不是，删除数据包，以防止数据包在另一个MPLS FRR备份路径上的第一个路由域再次被重新路由。

5. 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。

6. 发明申请

US20100309919A1 LABEL DISTRIBUTION PROTOCOL LABEL FILTERING 有权
标题翻译：标签分配协议标签过滤
公开(公告)号：US20100309919A1
公开(公告)日：2010-12-09
申请号：US12478388
申请日：2009-06-04
申请人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
发明人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/00 , H04L45/026 , H04L45/04
摘要： In one embodiment, a device of a particular non-backbone routing domain in a computer network determines whether each of one or more routes is reachable within the particular non-backbone domain. The device may then generate a filtered set of label mappings having only those of the one or more routes reachable within the particular non-backbone domain. Accordingly, the device may advertise label mappings only of the filtered set to one or more neighboring devices.
摘要翻译：在一个实施例中，计算机网络中的特定非骨干路由域的设备确定一个或多个路由中的每一个是否在特定非骨干域内可达。然后，设备可以生成仅具有在特定非骨干域内可达的一个或多个路由的那些过滤的标签映射集合。因此，设备可以将仅滤波集合的标签映射通告给一个或多个相邻设备。

7. 发明授权

US07535828B2 Algorithm for backup PE selection 有权
标题翻译：备份PE选择算法
公开(公告)号：US07535828B2
公开(公告)日：2009-05-19
申请号：US11084838
申请日：2005-03-18
申请人： Robert Raszuk , Jean-Philippe Vasseur , Clarence Filsfils , Jim Guichard
发明人： Robert Raszuk , Jean-Philippe Vasseur , Clarence Filsfils , Jim Guichard
IPC分类号： G01R31/08 , H04L12/28
CPC分类号： H04L45/28 , H04L45/04 , H04L45/502
摘要： A fast reroute (FRR) technique is implemented at the edge of a computer network. 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 backup edge device is not permitted to reroute the packets a second time. According to the inventive technique, the edge device first identifies a group one or more possible backup edge devices and then selects at least one preferred backup edge device from the group. The edge device makes its selection based on the values of one or more metrics associated with the possible backup edge devices. The metrics are input to a novel selection algorithm that selects the preferred backup edge device(s) using a hierarchical selection process or a weighted-metric selection process, or some combination thereof.
摘要翻译：在计算机网络的边缘实现快速重路由（FRR）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份边缘设备，该备份边缘设备又将分组转发到邻居域。备份边缘设备不允许再次重新路由数据包。根据本发明的技术，边缘设备首先识别一个或多个可能的备份边缘设备，然后从组中选择至少一个优选的备份边缘设备。边缘设备根据与可能的备份边缘设备相关联的一个或多个度量值进行选择。将度量输入到新颖的选择算法，其使用分层选择过程或加权度量选择过程或其某种组合来选择优选的备份边缘设备。

8. 发明申请

US20110080911A1 Forwarding of Packets to a Same Location Having a Same Internet Protocol (IP) Address Embedded in a Different Advertised Route 审中-公开
标题翻译：将数据包转发到具有嵌入在不同广告路由中的相同互联网协议（IP）地址的相同位置
公开(公告)号：US20110080911A1
公开(公告)日：2011-04-07
申请号：US12573088
申请日：2009-10-02
申请人： Jim Guichard , Pradosh Mohapatra , Clarence Filsfils
发明人： Jim Guichard , Pradosh Mohapatra , Clarence Filsfils
IPC分类号： H04L12/56
CPC分类号： H04L45/24 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/50
摘要： Routes advertised in a network may include an Internet Protocol (IP) address and one or more values to distinguish the route from other route(s) including the same IP address. Routes in a same context (e.g., within a same Virtual Private Network or for an entire network) with a same IP address are considered to refer to a same destination. When these routes are associated with different paths through a network, these different paths can be used to forward traffic for packets associated with routes including a same IP address (in a same context), particularly in response to a network problem.
摘要翻译：在网络中通告的路由可以包括因特网协议（IP）地址和一个或多个值以区分路由与包括相同IP地址的其他路由。具有相同IP地址的相同上下文（例如，在相同的虚拟专用网络或整个网络内）的路由被认为是指相同的目的地。当这些路由与通过网络的不同路径相关联时，这些不同的路径可以用于转发与包括相同IP地址（在相同上下文中）的路由相关联的分组的流量，特别是响应于网络问题。

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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