公开(公告)号：US20170111209A1

公开(公告)日：2017-04-20

申请号：US15148864

申请日：2016-05-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： David D. Ward ,  Carlos M. Pignataro ,  Frank Brockners ,  Shwetha Subray Bhandari

IPC: H04L12/24 ,  H04L29/06 ,  H04L12/54

CPC classification number: H04L41/0631 ,  H04L12/4633 ,  H04L12/4641 ,  H04L12/56 ,  H04L41/04 ,  H04L41/0677 ,  H04L41/0686 ,  H04L43/024 ,  H04L43/04 ,  H04L43/0811 ,  H04L43/0817 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/087 ,  H04L43/0876 ,  H04L43/10 ,  H04L45/50 ,  H04L69/22 ,  H04L2012/5625

Abstract: Embodiments of the disclosure pertain to activating in-band OAM based on a triggering event. Aspects of the embodiments are directed to receiving a first notification indicating a problem in a network; triggering a data-collection feature on one or more nodes in the network for subsequent packets that traverse the one or more nodes; evaluating a subsequent packet that includes data augmented by the data collection feature; and determining the problem in the network based on the data augmented to the subsequent 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

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Stewart Frederick Bryant ,  Carlos M. Pignataro ,  George Swallow

IPC: H04L12/703 ,  H04L12/723

CPC classification number: H04L45/28 ,  H04L45/22 ,  H04L45/50

Abstract: 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.

Abstract translation: 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：US20170005920A1

公开(公告)日：2017-01-05

申请号：US14825273

申请日：2015-08-13

Applicant: Cisco Technology, Inc.

Inventor： Stefano Benedetto Previdi ,  James N. Guichard ,  Clarence Filsfils ,  Carlos M. Pignataro

IPC: H04L12/723 ,  H04L12/46 ,  H04L12/741

CPC classification number: H04L45/507 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/50 ,  H04L45/74 ,  H04L47/2441 ,  H04L69/22

Abstract: In one embodiment, a device in a network receives a packet that includes a forwarding label for a service in a service chain. The packet encapsulates a service chain header for the service chain. The device swaps the forwarding label for the service in the packet for a reserved label that identifies the packet as encapsulating the service chain header. The device forwards the packet with the reserved label to the service.

Abstract translation: 在一个实施例中，网络中的设备接收包括用于服务链中的服务的转发标签的分组。 该分组封装了服务链的服务链头。 该设备将数据包中的服务的转发标签交换为将包定义为封装服务链头的保留标签。 设备将保留标签的报文转发给业务。

公开(公告)号：US09444677B2

公开(公告)日：2016-09-13

申请号：US14155409

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar ,  Carlos M. Pignataro ,  Clarence Filsfils ,  Pierre Jean Rene Francois

IPC: H04L12/24 ,  H04L12/723 ,  H04L12/703 ,  H04L12/707 ,  H04L12/721

CPC classification number: H04L41/0668 ,  H04L41/0659 ,  H04L45/22 ,  H04L45/28 ,  H04L45/34 ,  H04L45/50 ,  H04L45/507

Abstract: In one embodiment, a method comprises selecting, by an ingress provider edge router, one of first or second provider edge routers as a primary router for reaching a destination via a core network, and selecting the other of the first or second provider edge routers as a backup router for reaching the destination via the core network; and inserting, into an IPv6 data packet destined for the destination, a primary label assigned by the primary router and a repair label assigned by backup router, and an IPv6 extension header specifying first and second segment identifiers associated with the respective first and second provider edge routers and a protected flag that enables fast rerouting of the IPv6 data packet to the backup router if the primary router is unavailable.

Abstract translation: 在一个实施例中，一种方法包括：由入口提供商边缘路由器选择第一或第二提供商边缘路由器之一作为主路由器，经由核心网络到达目的地，并且选择第一或第二提供商边缘路由器中的另一个作为 通过核心网络到达目的地的备用路由器; 并将目的地为目的地的IPv6数据包插入到由主路由器分配的主标签和由备份路由器分配的修复标签，以及指定与相应的第一和第二提供商边缘相关联的第一和第二段标识符的IPv6扩展报头 路由器和受保护的标志，如果主路由器不可用，则可以将IPv6数据包快速重新路由到备份路由器。

公开(公告)号：US09444675B2

公开(公告)日：2016-09-13

申请号：US13912224

申请日：2013-06-07

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Carlos M. Pignataro ,  David Ward ,  Paul Quinn ,  Surendra Kumar

IPC: H04L1/00 ,  H04L12/24 ,  H04L12/26 ,  H04L12/703 ,  H04L12/725 ,  H04L12/723

CPC classification number: H04L41/5009 ,  H04L41/0654 ,  H04L41/0668 ,  H04L41/5038 ,  H04L41/5077 ,  H04L43/0823 ,  H04L43/50 ,  H04L45/28 ,  H04L45/302 ,  H04L45/50 ,  H04L67/10

Abstract: Presented herein are techniques performed in a network comprising a plurality of network nodes each configured to apply one or more service functions to traffic that passes the respective network nodes in a service path. At a network node, an indication is received of a failure or degradation of one or more service functions or applications applied to traffic at the network node. Data descriptive of the failure or degradation is generated. A previous service hop network node at which a service function or application was applied to traffic in the service path is determined. The data descriptive of the failure or degradation is communicated to the previous service hop network node.

Abstract translation: 这里呈现的是在包括多个网络节点的网络中执行的技术，每个网络节点被配置为将一个或多个服务功能应用于通过服务路径中的相应网络节点的业务。 在网络节点处，接收到应用于网络节点处的业务的一个或多个服务功能或应用的故障或劣化的指示。 产生描述故障或退化的数据。 确定应用服务功能或应用程序到服务路径中的业务的先前服务跳网络节点。 将描述故障或劣化的数据传送到先前的服务跳网络节点。

公开(公告)号：US20160261474A1

公开(公告)日：2016-09-08

申请号：US14635438

申请日：2015-03-02

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Srihari Raghavan ,  Nobushige Akiya ,  Carlos M. Pignataro ,  Mallik Mudigonda ,  Nagendra Kumar Nainar

IPC: H04L12/26

CPC classification number: H04L43/10 ,  H04L41/5012

Abstract: In one embodiment, a method includes assigning a discriminator to a target in communication with a reflector at a network device, identifying at the reflector, a packet comprising the discriminator, the packet transmitted from an initiator in a seamless bidirectional forwarding detection (S-BFD) session, and transmitting a response packet from the reflector to the initiator. The response packet includes information for the target obtained by the reflector through monitoring of the target. The target may comprise a plurality of entities. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括将鉴别器分配给与网络设备上的反射器通信的目标，在反射器处识别包括鉴别器的分组，在无缝双向转发检测（S-BFD）中从发起者发送的分组 ）会话，并将响应分组从反射器发送到发起者。 响应包包括通过对目标的监视由反射器获得的目标的信息。 目标可以包括多个实体。 本文还公开了一种装置和逻辑。

公开(公告)号：US20160142278A1

公开(公告)日：2016-05-19

申请号：US15004148

申请日：2016-01-22

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Nagendra Kumar

IPC: H04L12/26 ,  H04L12/715 ,  H04L1/14 ,  H04L12/24 ,  H04L12/707

CPC classification number: H04L43/10 ,  H04L1/14 ,  H04L41/0866 ,  H04L45/24 ,  H04L45/64

Abstract: In one embodiment, an ingress network virtualization edge (NVE) in a computer network generates an echo packet, and sets an indication in the echo packet that the echo packet is for overlay path validation. In addition, the ingress NVE sets a message type of the echo packet to a generic echo request, and includes virtualization network (VN) context information within the echo packet. Once setting a destination address of the echo packet as an egress NVE address and including an indication to the egress NVE that the echo packet is an operations, administration, and management (OAM) message, the ingress NVE may then send the echo packet toward the egress NVE (e.g., to validate the VN context information and/or to reveal multipath traces).

公开(公告)号：US20160124957A1

公开(公告)日：2016-05-05

申请号：US14529467

申请日：2014-10-31

Applicant: Cisco Technology, Inc.

Inventor： Mark Ammar Rayes ,  Hector Guillermo Trevino ,  Carlos M. Pignataro

IPC: G06F17/30

CPC classification number: G06F17/30663 ,  G06F17/30705 ,  G06F17/30864

Abstract: Techniques are presented herein to monitor a plurality of big data sources in order to dynamically identify keywords. The big data sources are analyzed to classify the keywords as related to either a technical problem or to a solution to the technical problem. In addition, data associated with the keywords is weighted based on one or more attributes of the data and stored in a database in a problem-solution format.

Abstract translation: 这里呈现技术来监视多个大数据源以便动态地识别关键字。 分析大数据源，将关键字分类为技术问题或技术问题的解决方案。 此外，与关键字相关联的数据基于数据的一个或多个属性加权，并以问题解决方案格式存储在数据库中。

公开(公告)号：US09237078B1

公开(公告)日：2016-01-12

申请号：US14315570

申请日：2014-06-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Nobushige Akiya

IPC: H04L12/26 ,  H04L12/70

CPC classification number: H04L43/0811 ,  H04L43/10

Abstract: In one embodiment, a method includes generating a path validation packet at a network device, the path validation packet including a plurality of segment identifiers for use in segment routing and an operations, administration, and management (OAM) segment identifier for use in path validation, transmitting from the network device the path validation packet on a path having a plurality of routers associated with the segment identifiers, one of the routers associated with the OAM segment identifier, and validating the path if a return path validation packet is received. An apparatus is also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括在网络设备处生成路径验证分组，所述路径验证分组包括用于分段路由的多个分段标识符以及用于路径验证的操作，管理和管理（OAM）段标识符 从网络设备发送具有与段标识符相关联的多个路由器的路径上的路径验证分组，与OAM分段标识符相关联的路由器之一，以及如果接收到返回路径验证分组则验证该路径。 本文还公开了一种装置。

公开(公告)号：US20150030026A1

公开(公告)日：2015-01-29

申请号：US13951758

申请日：2013-07-26

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar ,  Rajiv Asati ,  Carlos M. Pignataro

IPC: H04L12/723

Abstract: The present disclosure provides for carrying reachability information in an echo request message and/or an echo reply message, which can be used to reach an initiator when the initiator's address is unknown. An echo request message includes an FEC (forwarding equivalence class) stack that identifies a label switched path (LSP). The echo request message is received by a label switching routing element (LSR) on the LSP, and the echo request is originated by an initiator. In response to a detection that the FEC stack changes at the LSR, a segment reachability (SR) sub-TLV (type-length-value) element can be generated, where the SR sub-TLV includes reachability information that can be used to reach the initiator, and the reachability information includes an incoming label allocated by the LSR to reach the initiator.

Abstract translation: 本公开提供了在回波请求消息和/或回应应答消息中携带可达性信息，其可以用于在发起者的地址未知时到达发起者。 回应请求消息包括标识标签交换路径（LSP）的FEC（转发等价类）堆栈。 回波请求消息由LSP上的标签交换路由元素（LSR）接收，回叫请求由发起者发起。 响应于FEC堆栈在LSR处的变化的检测，可以生成段可达性（SR）子TLV（类型长度值）元素，其中SR子TLV包括可用于到达的可达性信息 启动器和可达性信息包括由LSR分配的到达发起者的输入标签。