公开(公告)号：US20170111261A1

公开(公告)日：2017-04-20

申请号：US14996541

申请日：2016-01-15

Applicant: Cisco Technology, Inc.

Inventor： Pierre Francois ,  Francois Clad ,  Alan Gous ,  Clarence Filsfils

IPC: H04L12/733 ,  H04L12/729 ,  H04L12/721

CPC classification number: H04L45/122 ,  H04L45/125 ,  H04L45/44

Abstract: A method and related apparatus for providing latency optimized segment routing tunnels is described herein and includes obtaining a latency metric for each segment that links respective pairs of nodes in a network, determining a tunnel through the network between a first endpoint and a second endpoint that is optimized for latency, and, once such a tunnel is determined, causing a packet to travel along the tunnel that is optimized for latency by encoding the packet with segment routing instructions for the network, wherein the network is configured to provide shortest paths according to a metric other than latency.

公开(公告)号：US09590850B2

公开(公告)日：2017-03-07

申请号：US13962226

申请日：2013-08-08

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Clarence Filsfils ,  George Swallow ,  Jean Philippe Vasseur ,  Zafar Ali

IPC: H04L12/24 ,  H04L12/751 ,  H04L12/717

CPC classification number: H04L41/0813 ,  H04L41/0896 ,  H04L45/02 ,  H04L45/42

Abstract: In one embodiment, a method includes receiving at a node in a first network, information identifying a spare interface between a first network device in the first network and a second network device in a second network, and using the spare interface to create a path in the first network if the spare interface is compatible. The spare interface information includes connectivity and compatibility information.

Abstract translation: 在一个实施例中，一种方法包括在第一网络中的节点处接收标识第一网络中的第一网络设备与第二网络中的第二网络设备之间的备用接口的信息，以及使用备用接口创建路径 第一个网络如果备用接口兼容。 备用接口信息包括连接和兼容性信息。

公开(公告)号：US20170064717A1

公开(公告)日：2017-03-02

申请号：US15244735

申请日：2016-08-23

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Clarence Filsfils ,  Muthurajah Sivabalan ,  Stefano B. Previdi ,  Tarek Saad

IPC: H04W72/04 ,  H04L12/24 ,  H04L12/723 ,  H04L29/06 ,  H04L12/801 ,  H04L29/12

CPC classification number: H04L69/22 ,  H04L41/5051 ,  H04L41/5077 ,  H04L45/50 ,  H04L47/17 ,  H04W88/12 ,  H04W88/16

Abstract: Utilizing the systems disclosed herein, a network element (in a network) controls, within another network, the constraints of a service, timing of the creation of the service, and selection a service on which a packet is transmitted. For example, a first network element (located in a first network) receives a request associated with initiating a service. The request is received from a second network element located in a second network and includes at least one path constraint. The first network element controls creation of the service in the first network on behalf of the second network element located in the second network by, e.g., identifying a path based, at least in part, on the at least one path constraint; and binding an identifier and an interface to the path, wherein the interface is associated with one or more operation to perform on any traffic that is labeled with the identifier.

Abstract translation: 利用本文公开的系统，网络元件（在网络中）在另一个网络内控制服务的约束，创建服务的定时，以及选择其上传送分组的服务。 例如，第一网络元件（位于第一网络中）接收与启动服务相关联的请求。 从位于第二网络中的第二网络单元接收该请求，并且包括至少一个路径约束。 第一网络元件至少部分地基于至少一个路径约束来控制代表位于第二网络中的第二网络元件在第一网络中创建服务，例如，基于路径; 以及将标识符和接口绑定到所述路径，其中所述接口与对标识有所述标识符的任何业务执行的一个或多个操作相关联。

公开(公告)号：US20170048138A1

公开(公告)日：2017-02-16

申请号：US15337976

申请日：2016-10-28

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Muthurajah Sivabalan ,  Sami Boutros ,  Clarence Filsfils ,  Rex Emmanuel Fernando ,  Lakshmi Sharma ,  Santiago Vazquez Freitas ,  Bruce McDougall ,  Robert Keith Fielding

IPC: H04L12/723 ,  H04L29/12 ,  H04L12/911

CPC classification number: H04L45/50 ,  H04L47/825 ,  H04L61/2007

Abstract: A method is provided in one example embodiment and includes receiving a request to create a path through a network, wherein the path originates on a first network device and terminates on the second network device; identifying a first controller associated with the first network device, wherein the first controller proxies control plane functions for the first network device; identifying a second controller associated with the second network device, wherein the second controller proxies control plane functions for the second network device; and computing the path using the first controller as a source and the second controller as a destination. The first controller installs the computed path on the first network device and the second controller installs the computed path on the second network device.

Abstract translation: 在一个示例性实施例中提供了一种方法，并且包括接收通过网络创建路径的请求，其中所述路径起始于第一网络设备并终止于所述第二网络设备上; 识别与所述第一网络设备相关联的第一控制器，其中所述第一控制器代理所述第一网络设备的控制平面功能; 识别与所述第二网络设备相关联的第二控制器，其中所述第二控制器代理所述第二网络设备的控制平面功能; 以及使用第一控制器作为源并且将第二控制器作为目的地来计算路径。 第一个控制器在第一个网络设备上安装计算的路径，第二个控制器将计算的路径安装在第二个网络设备上。

公开(公告)号：US09571349B2

公开(公告)日：2017-02-14

申请号：US14211101

申请日：2014-03-14

Applicant: Cisco Technology, Inc.

Inventor： Stefano B. Previdi ,  Clarence Filsfils

IPC: H04L12/24 ,  H04L12/721 ,  H04L12/723 ,  H04L12/715 ,  H04L12/741

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

Abstract: An apparatus and method for path creation element driven dynamic setup of forwarding adjacencies and explicit path. In one embodiment of the method, a node receives an instruction to create a tunnel between the node and another node. The node creates or initiates the creation of the tunnel in response to receiving the instruction, wherein the tunnel comprises a plurality of nodes in data communication between the node and the other node. The node maps a first identifier (ID) to information relating to the tunnel. The node advertises the first ID to other nodes in a network of nodes.

Abstract translation: 用于路径创建元素驱动动态建立转发邻接和显式路径的装置和方法。 在该方法的一个实施例中，节点接收在节点和另一节点之间创建隧道的指令。 所述节点响应于接收到所述指令而创建或发起所述隧道的创建，其中所述隧道包括所述节点与所述另一节点之间的数据通信中的多个节点。 节点将第一标识符（ID）映射到与隧道相关的信息。 节点将第一个ID通告给节点网络中的其他节点。

公开(公告)号：US09559954B2

公开(公告)日：2017-01-31

申请号：US14155601

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Stefano B. Previdi ,  Ahmed R. Bashandy

IPC: H04L12/741 ,  H04L12/801 ,  H04L12/751 ,  H04L12/701 ,  H04L12/723

CPC classification number: H04L45/745 ,  H04L45/00 ,  H04L45/02 ,  H04L45/50 ,  H04L45/54

Abstract: An apparatus and method for using indexed segment identifiers in segment routing. An example method involves receiving a globally unique index value at a node. The method also involves receiving a base value at the node, where the base value comprises a segment routing value configured to identify a nodal segment. The method then involves calculating a segment identifier based on the index value and the base value.

Abstract translation: 在段路由中使用索引段标识符的装置和方法。 一个示例方法涉及在节点处接收全局唯一的索引值。 该方法还涉及在节点处接收基本值，其中基本值包括被配置为识别节点段的段路由值。 该方法然后包括基于索引值和基础值计算段标识符。

公开(公告)号：US20160373317A1

公开(公告)日：2016-12-22

申请号：US15234212

申请日：2016-08-11

Applicant: Cisco Technology, Inc.

Inventor： Zafar Ali ,  Muthurajah Sivabalan ,  Clarence Filsfils ,  Jan Medved

IPC: H04L12/24 ,  H04L12/911 ,  H04L12/26

CPC classification number: H04L41/5051 ,  H04L41/0896 ,  H04L43/0876 ,  H04L47/825

Abstract: Bandwidth usage for an existing communication tunnel between a first device and second device is monitored. A determination is made that additional bandwidth is required for communication between the first network device and the second network device. A determination is made that for the addition of the additional bandwidth would exceed available bandwidth for the existing tunnel. Additional bandwidth is established between the first network device and the second network device.

Abstract translation: 监视第一设备和第二设备之间现有通信隧道的带宽使用情况。 确定第一网络设备和第二网络设备之间的通信需要额外的带宽。 确定附加带宽的增加将超过现有隧道的可用带宽。 在第一网络设备和第二网络设备之间建立额外的带宽。

公开(公告)号：US20160352654A1

公开(公告)日：2016-12-01

申请号：US15234794

申请日：2016-08-11

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/931 ,  H04L12/741

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

Abstract: 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.

Abstract translation: 公开了一种方法，装置和计算机可读介质。 在该方法的一个实施例中，在第一分段路由启用节点处接收分组和分段ID堆栈。 段ID堆栈包括多个段ID，一个或者是标识分割段路由选择网络的第一区域的第一区域段ID。 基于第一区域段ID选择启用第一段路由的节点的出口接口。 此后，经由选择的出口接口转发分组。

公开(公告)号：US20160308757A1

公开(公告)日：2016-10-20

申请号：US15197971

申请日：2016-06-30

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  George L. Swallow

IPC: H04L12/703 ,  H04L12/721 ,  H04L12/715 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L12/4645 ,  H04L45/04 ,  H04L45/22 ,  H04L45/66

Abstract: A method, apparatus, and computer-readable storage medium are disclosed for processing shared risk group (SRG) information in communications networks. The method includes processing, at a first network layer, first network information comprising a plurality of SRG identifiers. The processing includes producing second network information comprising a smaller number of SRG identifiers than that of the plurality of SRG identifiers. The method further includes sending at least a portion of the second network information to the second network layer. The apparatus includes a network interface adapted to send network information comprising SRG information, a processor coupled to the network interface, and a memory coupled to the processor and adapted to store program instructions operable when executed to carry out steps of the method. The storage medium is configured to store program instructions that when executed are configured to cause a processor to carry out steps of the method.

Abstract translation: 公开了用于处理通信网络中的共享风险组（SRG）信息的方法，装置和计算机可读存储介质。 该方法包括在第一网络层处处理包括多个SRG标识符的第一网络信息。 该处理包括产生包括比多个SRG标识符的SRG标识符少的SRG标识符的第二网络信息。 该方法还包括将第二网络信息的至少一部分发送到第二网络层。 该装置包括适于发送包括SRG信息的网络信息，耦合到网络接口的处理器和耦合到处理器的存储器的网络接口，并且适于存储当被执行以可执行以执行该方法的步骤时可操作的程序指令。 存储介质被配置为存储当被执行时被配置为使处理器执行该方法的步骤的程序指令。

公开(公告)号：US09462043B2

公开(公告)日：2016-10-04

申请号：US13927394

申请日：2013-06-26

Applicant: Cisco Technology, Inc.

Inventor： Daniel C. Frost ,  Stewart F. Bryant ,  Clarence Filsfils

IPC: G06F15/173 ,  G06F15/177 ,  H04L29/08 ,  H04L12/721 ,  G06F15/16 ,  H04L29/06

CPC classification number: H04L67/10 ,  H04L45/566 ,  H04L63/0428 ,  H04L2463/041

Abstract: One or more functions to be performed on a packet at one or more network nodes along a network path are determined at a network device. A packet is generated which includes a packet header. Included in the packet header are an instruction pointer and an instruction portion. A first instruction for the one or more functions to be performed at the one or more network nodes is written to the instruction portion. Additionally, a value pointing to the first instruction is written to the instruction pointer. The packet is transmitted along the network path from the network device.

Abstract translation: 在网络设备处确定在网络路径的一个或多个网络节点处对分组执行的一个或多个功能。 生成包含分组报头的分组。 分组报头中包括指令指针和指令部分。 将在一个或多个网络节点执行的一个或多个功能的第一指令写入指令部分。 另外，指向第一指令的值被写入指令指针。 该分组沿网络路径从网络设备传输。