公开(公告)号：US10911567B2

公开(公告)日：2021-02-02

申请号：US16458404

申请日：2019-07-01

申请人： Cisco Technology, Inc.

发明人： Timothy Evens ,  Serpil Bayraktar ,  David D. Ward

IPC分类号： H04L29/08 ,  H04L29/06

摘要： Presented herein is a Client Network Information Service (CNIS). The CNIS is configured to determine client network information for a communication from a client to at least one application running in a cloud infrastructure environment. The client network information is delivered to instances of the application and to a router associated with the application in order to enable the application to adjust service for the client.

公开(公告)号：US20200336360A1

公开(公告)日：2020-10-22

申请号：US16839273

申请日：2020-04-03

申请人： Cisco Technology, Inc.

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

IPC分类号： H04L12/24 ,  H04L12/54 ,  H04L29/06 ,  H04L12/26 ,  H04L12/46 ,  H04L12/723

摘要： 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：US20170374174A1

公开(公告)日：2017-12-28

申请号：US15238811

申请日：2016-08-17

申请人： Cisco Technology, Inc.

发明人： Timothy Evens ,  Serpil Bayraktar ,  David D. Ward

IPC分类号： H04L29/08 ,  H04L29/06

CPC分类号： H04L67/322 ,  H04L67/10 ,  H04L67/16 ,  H04L67/42

摘要： Presented herein is a Client Network Information Service (CNIS). The CNIS is configured to determine client network information for a communication from a client to at least one application running in a cloud infrastructure environment. The client network information is delivered to instances of the application and to a router associated with the application in order to enable the application to adjust service for the client.

公开(公告)号：US09847939B2

公开(公告)日：2017-12-19

申请号：US14878014

申请日：2015-10-08

申请人： Cisco Technology, Inc.

发明人： Keyur Patel ,  Serpil Bayraktar ,  Manish Bhardwaj ,  David D. Ward ,  Arjun Sreekantiah ,  Burjiz Pithawala

IPC分类号： H04L12/26 ,  H04L12/721 ,  H04L12/24

CPC分类号： H04L45/70 ,  H04L41/0893 ,  H04L43/50 ,  H04L45/02 ,  H04L45/04 ,  H04L45/123 ,  H04L45/22

摘要： A network includes a route reflector peered with client routers. From a perspective of the route reflector, a best path to the destination address is selected by applying to candidate paths ordered comparison tests that progress from policy tests through one or more additional tests until the best path is selected. A determination is made as to whether the best path was selected based on the policy tests exclusively. If the best path was selected based on the policy tests exclusively, the best path is assigned to each of the client routers. If the best path was not selected based on the policy tests exclusively, from a perspective of each client router, a respective best path is selected by applying to the candidate paths the one or more additional tests, and the respective best paths are assigned to the respective client routers.

公开(公告)号：US09722878B2

公开(公告)日：2017-08-01

申请号：US15234794

申请日：2016-08-11

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  David D. Ward ,  Stewart F. Bryant ,  Daniel C. Frost ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/723 ,  H04L12/24 ,  H04L12/721 ,  H04L12/715 ,  H04L12/741 ,  H04L12/931

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： A method, apparatus, and computer readable medium are disclosed. In one embodiment of the method, a packet and a segment ID stack is received at a first segment routing enabled node. The segment ID stack includes a plurality of segment IDs, one or which is a first area-segment ID that identifies a first area of a subdivided segment routing network. An egress interface of the first segment routing enabled node is selected based on the first area-segment ID. Thereafter, the packet is forwarded via the selected egress interface.

公开(公告)号：US20170180257A1

公开(公告)日：2017-06-22

申请号：US15449940

申请日：2017-03-04

申请人： CISCO TECHNOLOGY, INC.

发明人： James N. Guichard ,  Paul Quinn ,  David D. Ward ,  Carlos M. Pignataro

IPC分类号： H04L12/803 ,  H04L29/08 ,  H04L29/06

CPC分类号： H04L47/125 ,  H04L45/306 ,  H04L45/38 ,  H04L45/74 ,  H04L47/2408 ,  H04L47/2441 ,  H04L67/02 ,  H04L67/1023 ,  H04L67/327 ,  H04L69/22 ,  H04W72/0486

摘要： A method for load balancing based on metadata in a network service header. The method includes receiving a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including metadata and service path information for the traffic flow identifying the service path, and the metadata comprises classification information of the packet or frame, extracting, by a service header processor of the load balancer, the classification information of the metadata from the packet or frame, and applying, by a load balancing function of the load balancer, a load balancing policy on the packet or frame based on the classification information of the metadata.

公开(公告)号：US09565160B2

公开(公告)日：2017-02-07

申请号：US14205245

申请日：2014-03-11

申请人： Cisco Technology, Inc.

发明人： Stefano B. Previdi ,  Clarence Filsfils ,  Ahmed R. Bashandy ,  David D. Ward

IPC分类号： H04L12/721 ,  H04L29/12 ,  H04L12/751 ,  H04L12/717 ,  H04L12/723

CPC分类号： H04L61/30 ,  H04L45/02 ,  H04L45/34 ,  H04L45/38 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50

摘要： Various techniques can be used to advertise adjacency segment identifiers (IDs) within a segment routing (SR) network. For example, a method, performed by a first node, can involve identifying an adjacency segment between a first node and a second node; assigning an identifier to the adjacency segment; and sending an Intermediate-System-to-Intermediate-System (IS-IS) hello (IIH) message to another node. The adjacency advertisement includes the identifier. If the adjacency segment is part of a LAN, the IIH message can be sent to a designated node that aggregates adjacency segment ID advertisements for the other nodes on the LAN.

摘要翻译： 可以使用各种技术来在段路由（SR）网络中通告相邻段标识符（ID）。 例如，由第一节点执行的方法可以涉及识别第一节点和第二节点之间的邻接段; 将标识符分配给邻接段; 并向另一个节点发送中间系统到中间系统（IS-IS）hello（IIH）消息。 邻接广告包括标识符。 如果邻接段是LAN的一部分，则可以将IIH消息发送到指定的节点，该节点聚合LAN上其他节点的邻接段ID通告。

公开(公告)号：US20140330964A1

公开(公告)日：2014-11-06

申请号：US14334484

申请日：2014-07-17

申请人： Cisco Technology, Inc.

发明人： Stefano B. Previdi ,  David D. Ward

IPC分类号： H04L12/721

CPC分类号： H04L45/70 ,  H04L67/1002 ,  H04L67/1008 ,  H04L67/101 ,  H04L67/2814 ,  H04L67/32

摘要： A technique optimizes routing of application data streams on an Internet Protocol (IP) backbone in a computer network. According to the novel technique, a client router learns of server states (e.g., number of pending requests, etc.) of a plurality of application servers and also determines metrics of intermediate links between the application servers and the client router (intermediate link metrics), e.g., particularly link metrics in a direction from the application servers to the client router. Upon receiving an application request from an application client (“client request”), the client router determines to which of the application servers the client request is to be sent based on the server states and intermediate link metrics, and sends the client request accordingly.

摘要翻译： 一种技术优化了计算机网络中的因特网协议（IP）骨干网上的应用数据流的路由。 根据新技术，客户端路由器学习多个应用服务器的服务器状态（例如，等待请求的数量等），并且还确定应用服务器与客户端路由器之间的中间链路的度量（中间链路度量） ，例如，特别是从应用服务器到客户端路由器的方向上的链路度量。 在从应用客户端（“客户端请求”）接收到应用请求时，客户端路由器根据服务器状态和中间链路度量确定哪个应用服务器要发送客户端请求，并相应地发送客户端请求。

公开(公告)号：US20140269721A1

公开(公告)日：2014-09-18

申请号：US14096358

申请日：2013-12-04

申请人： Cisco Technology, Inc.

发明人： Ahmed R. Bashandy ,  Clarence Filsfils ,  David D. Ward

IPC分类号： H04L12/723

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： An apparatus and method is disclosed for segment routing (SR) over label distribution protocol (LDP). In one embodiment, the method includes a node receiving a packet with an attached segment ID. In response, the node may attach a label to the packet. Thereafter, the node may forward the packet with the attached label and segment ID to another node via a label switched path (LSP).

摘要翻译： 公开了一种用于通过标签分发协议（LDP）的分段路由（SR）的装置和方法。 在一个实施例中，该方法包括接收具有附加段ID的分组的节点。 作为响应，节点可以附加到分组的标签。 此后，节点可以经由标签交换路径（LSP）将具有附加标签和分段ID的分组转发到另一节点。

公开(公告)号：US20140269422A1

公开(公告)日：2014-09-18

申请号：US14211174

申请日：2014-03-14

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Thomas F. Telkamp ,  David D. Ward ,  Stewart F. Bryant

IPC分类号： H04L12/24 ,  H04L12/721

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： A system and method are disclosed for generating segment routing (SR) segment lists. In one embodiment, a node receives information that identifies a path from a first node to a second node. Based on the received path, a set of segment identifiers that encodes the path is generated. A packet that is forwarded along the set of segment identifiers travels the received path.

摘要翻译： 公开了用于生成段路由（SR）段列表的系统和方法。 在一个实施例中，节点接收标识从第一节点到第二节点的路径的信息。 基于接收到的路径，生成一组编码路径的段标识符。 沿着该段标识符转发的分组传送到接收的路径。