公开(公告)号：US09794168B2

公开(公告)日：2017-10-17

申请号：US14819346

申请日：2015-08-05

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  Carlos M. Pignataro ,  George Swallow

IPC分类号： H04L12/703 ,  H04L12/723

CPC分类号： H04L45/28 ,  H04L45/22 ,  H04L45/50

摘要： In one embodiment, a method includes generating at a network device, a continuity test packet configured to pass through a set of communication paths terminating at the network device and at least one other network device located at an opposite end of the communication paths, transmitting at the network device the continuity test packet on a first communication path in the set of communication paths, and identifying at the network device a failure in the set of communication paths if the continuity test packet is not received on a last communication path in the set of communication paths. An apparatus and logic are also disclosed herein.

公开(公告)号：US20160254994A1

公开(公告)日：2016-09-01

申请号：US15001528

申请日：2016-01-20

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  George Swallow ,  Muthurajah Sivabalan

IPC分类号： H04L12/723 ,  H04L12/26

CPC分类号： H04L45/507 ,  H04L43/0829 ,  H04L43/0835 ,  H04L45/50

摘要： Particular embodiments described herein provide for a communication system that can be configured to identify a system that includes network traffic, where at least a portion of the network traffic includes packets, at least a portion of the packets include a stack, and at least a portion of each stack includes one or more previously allocated labels. The communication system can further be configured to determine a synonymous label that triggers an action and to replace a label from the one of the one or more previously allocated labels in a specific stack of a specific packet with the synonymous label. In an example, the synonymous label can be used to identify a subset of packets in the network traffic or a source of the specific packet.

摘要翻译： 本文描述的特定实施例提供了通信系统，其可以被配置为识别包括网络业务的系统，其中网络业务的至少一部分包括分组，分组的至少一部分包括堆栈，以及至少一部分 每个堆栈包括一个或多个先前分配的标签。 通信系统还可以被配置为确定触发动作的同义标签，并且用具有同义标签的特定分组的特定栈中的一个或多个先前分配的标签之一来替换标签。 在一个示例中，同义标签可以用于标识网络流量中的分组的子集或特定分组的源。

公开(公告)号：US09474040B2

公开(公告)日：2016-10-18

申请号：US14508907

申请日：2014-10-07

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  Christian Cassar ,  Willem Maria Verrydt

IPC分类号： H04W64/00

CPC分类号： H04W64/00

摘要： An example method for independently verifying a transit point in a network environment is provided and includes receiving, at a transit point in a packet network, at least two radio signals from corresponding different radio sources, receiving, at the transit point, a sampling request in an packet message, and transmitting in another packet message a sample of the at least two radio signals such that by comparing the sample with an expected sample, a location of the transit point is determined. The expected sample can comprise another sample of the at least two radio signals that would have been received by the transit point at an expected location at a time of receipt of the sampling request, and if the expected sample matches the sample, the transit point is determined to be at the expected location.

摘要翻译： 提供了用于独立地验证网络环境中的转接点的示例性方法，并且包括在分组网络中的转接点处接收来自相应的不同无线电源的至少两个无线电信号，在中转点处接收一个采样请求 分组消息，并且在另一分组消息中发送所述至少两个无线电信号的样本，使得通过将所述样本与预期样本进行比较来确定所述中转点的位置。 预期采样可以包括在接收采样请求时在预期位置处由转接点接收到的至少两个无线电信号的另一采样，并且如果预期采样与样本匹配，则转接点为 决定在预期的位置。

公开(公告)号：US08976682B2

公开(公告)日：2015-03-10

申请号：US13760854

申请日：2013-02-06

申请人： Cisco Technology, Inc.

发明人： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC分类号： H04L12/24 ,  H04L12/26 ,  H04L12/721 ,  H04L12/703 ,  H04L12/723 ,  H04L12/801

CPC分类号： H04L12/2419 ,  H04L41/06 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L45/50 ,  H04L47/10

摘要： In one embodiment, a maintenance intermediate point (MIP) receives a packet traveling along a multi-protocol label switching (MPLS) label switched path (LSP) that extends from a first maintenance end point (MEP) to a second MEP. The receiving MIP decrements a time-to-live (TTL) value in a header of the packet. In response the TTL value in the header of the packet equaling a particular value, the receiving MIP examines an associated channel header (ACH) field in an operations, administration, and maintenance (OAM) message stored in a payload of the packet, and determines a particular OAM function to perform based on a code in the ACH field. The receiving MIP performs the particular OAM function.

摘要翻译： 在一个实施例中，维护中间点（MIP）接收沿着从第一维护终点（MEP）延伸到第二MEP的多协议标签交换（MPLS）标签交换路径（LSP）行进的分组。 接收MIP减少分组报头中的生存时间（TTL）值。 响应于等于特定值的分组的报头中的TTL值，接收MIP检查存储在分组的有效载荷中的操作，管理和维护（OAM）消息中的相关联的信道报头（ACH）字段，并且确定 基于ACH字段中的代码执行的特定OAM功能。 接收MIP执行特定的OAM功能。

公开(公告)号：US20150029871A1

公开(公告)日：2015-01-29

申请号：US13949492

申请日：2013-07-24

申请人： CISCO TECHNOLOGY, INC.

发明人： Dan Frost ,  Stewart Frederick Bryant

IPC分类号： H04L12/24 ,  H04L12/26

CPC分类号： H04L41/5038 ,  H04L41/142 ,  H04L43/026 ,  H04L43/50

摘要： In one embodiment, a device samples actual service traffic at a device in a computer network, and generates real-time statistics on distribution of various packet header parameters of the sampled traffic that influence forwarding in the computer network. As such, the device may generate and transmit synthetic measurement traffic according to the distribution. For instance, in one embodiment, the synthetic traffic may be a replay of actual service traffic with an indication that the replayed traffic is synthetic, while in another embodiment, newly generated synthetic measurement traffic may have packet header parameters substantially matching the sampled traffic.

摘要翻译： 在一个实施例中，设备在计算机网络中的设备处采样实际业务流量，并且生成影响计算机网络中的转发的采样流量的各种分组报头参数的分布的实时统计。 因此，设备可以根据分布生成和传输合成测量业务。 例如，在一个实施例中，合成业务可以是实际业务业务的重播，其中重播业务是合成的指示，而在另一个实施例中，新生成的合成测量业务可以具有基本匹配采样业务的分组头参数。

公开(公告)号：US10291516B2

公开(公告)日：2019-05-14

申请号：US15001528

申请日：2016-01-20

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  George Swallow ,  Muthurajah Sivabalan

IPC分类号： H04L12/723 ,  H04L12/26

摘要： Particular embodiments described herein provide for a communication system that can be configured to identify a system that includes network traffic, where at least a portion of the network traffic includes packets, at least a portion of the packets include a stack, and at least a portion of each stack includes one or more previously allocated labels. The communication system can further be configured to determine a synonymous label that triggers an action and to replace a label from the one of the one or more previously allocated labels in a specific stack of a specific packet with the synonymous label. In an example, the synonymous label can be used to identify a subset of packets in the network traffic or a source of the specific packet.

公开(公告)号：US20170041219A1

公开(公告)日：2017-02-09

申请号：US14819346

申请日：2015-08-05

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  Carlos M. Pignataro ,  George Swallow

IPC分类号： H04L12/703 ,  H04L12/723

CPC分类号： H04L45/28 ,  H04L45/22 ,  H04L45/50

摘要： In one embodiment, a method includes generating at a network device, a continuity test packet configured to pass through a set of communication paths terminating at the network device and at least one other network device located at an opposite end of the communication paths, transmitting at the network device the continuity test packet on a first communication path in the set of communication paths, and identifying at the network device a failure in the set of communication paths if the continuity test packet is not received on a last communication path in the set of communication paths. An apparatus and logic are also disclosed herein.

摘要翻译： 在一个实施例中，一种方法包括在网络设备处生成连续性测试分组，所述连续性测试分组被配置成通过终止于所述网络设备的一组通信路径以及位于所述通信路径的相对端的至少一个其他网络设备， 所述网络设备在所述一组通信路径中的第一通信路径上的所述连续性测试分组，以及如果在所述一组通信路径中的最后通信路径上未接收到所述连续性测试分组，则在所述网络设备处识别所述通信路径集合中的故障 通信路径 本文还公开了一种装置和逻辑。

公开(公告)号：US20160100377A1

公开(公告)日：2016-04-07

申请号：US14508907

申请日：2014-10-07

申请人： CISCO TECHNOLOGY, INC.

发明人： Stewart Frederick Bryant ,  Christian Cassar ,  Willem Maria Verrydt

IPC分类号： H04W64/00

CPC分类号： H04W64/00

摘要： An example method for independently verifying a transit point in a network environment is provided and includes receiving, at a transit point in a packet network, at least two radio signals from corresponding different radio sources, receiving, at the transit point, a sampling request in an packet message, and transmitting in another packet message a sample of the at least two radio signals such that by comparing the sample with an expected sample, a location of the transit point is determined. The expected sample can comprise another sample of the at least two radio signals that would have been received by the transit point at an expected location at a time of receipt of the sampling request, and if the expected sample matches the sample, the transit point is determined to be at the expected location.

摘要翻译： 提供了用于独立地验证网络环境中的转接点的示例性方法，并且包括在分组网络中的转接点处接收来自相应的不同无线电源的至少两个无线电信号，在中转点处接收一个采样请求 分组消息，并且在另一分组消息中发送所述至少两个无线电信号的样本，使得通过将所述样本与预期样本进行比较来确定所述中转点的位置。 预期采样可以包括在接收采样请求时在预期位置处由转接点接收到的至少两个无线电信号的另一采样，并且如果预期采样与样本匹配，则转接点为 决定在预期的位置。

公开(公告)号：US09143399B2

公开(公告)日：2015-09-22

申请号：US14186802

申请日：2014-02-21

申请人： Cisco Technology, Inc.

发明人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC分类号： G01R31/08 ,  H04L12/24 ,  H04L12/707 ,  H04L12/703 ,  H04L12/717

CPC分类号： H04L41/0668 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42

摘要： In an embodiment, a method comprises determining a set of protected components that are associated with a notifying node; determining a single network repair address for the set of protected components, wherein the single network repair address is for use in response to unavailability of any of the protected components when transmitting network traffic to the notifying node; assigning the single network repair address to each of the protected components; wherein the notifying node is an internetworking device and wherein the method is performed by one or more processors.

摘要翻译： 在一个实施例中，一种方法包括确定与通知节点相关联的一组受保护组件; 确定所述受保护组件集合的单个网络修复地址，其中，当将网络业务传输到所述通知节点时，所述单个网络修复地址用于响应于任何所述受保护组件的不可用性; 将单个网络修复地址分配给每个受保护的组件; 其中所述通知节点是互联网络设备，并且其中所述方法由一个或多个处理器执行。

公开(公告)号：US20130148489A1

公开(公告)日：2013-06-13

申请号：US13760854

申请日：2013-02-06

申请人： Cisco Technology, Inc.

发明人： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC分类号： H04L12/24

CPC分类号： H04L12/2419 ,  H04L41/06 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L45/50 ,  H04L47/10

摘要： In one embodiment, a maintenance intermediate point (MIP) receives a packet traveling along a multi-protocol label switching (MPLS) label switched path (LSP) that extends from a first maintenance end point (MEP) to a second MEP. The receiving MIP decrements a time-to-live (TTL) value in a header of the packet. In response the TTL value in the header of the packet equaling a particular value, the receiving MIP examines an associated channel header (ACH) field in an operations, administration, and maintenance (OAM) message stored in a payload of the packet, and determines a particular OAM function to perform based on a code in the ACH field. The receiving MIP performs the particular OAM function.

摘要翻译： 在一个实施例中，维护中间点（MIP）接收沿着从第一维护终点（MEP）延伸到第二MEP的多协议标签交换（MPLS）标签交换路径（LSP）行进的分组。 接收MIP减少分组报头中的生存时间（TTL）值。 响应于等于特定值的分组的报头中的TTL值，接收MIP检查存储在分组的有效载荷中的操作，管理和维护（OAM）消息中的相关联的信道报头（ACH）字段，并且确定 基于ACH字段中的代码执行的特定OAM功能。 接收MIP执行特定的OAM功能。