公开(公告)号：US10250459B2

公开(公告)日：2019-04-02

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 ,  H04L12/26 ,  H04L12/911

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.

公开(公告)号：US10171338B2

公开(公告)日：2019-01-01

申请号：US15426911

申请日：2017-02-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Clarence Filsfils ,  Bertrand Duvivier ,  Muthurajah Sivabalan

IPC: H04L12/28 ,  H04L12/751 ,  H04L12/46 ,  H04L12/741 ,  H04L12/851 ,  H04L12/803 ,  H04L12/717 ,  H04L12/753

Abstract: Embodiments of the present disclosure relate to methods and systems for on-demand next-hop resolution. Aspects of the embodiments include receiving a triggering event to prompt a request for a path to a network location; requesting a path computation from a second network element based on receiving the triggering event; receiving the path computation from the second network element; and programming an output interface with an indication of the path computation received from the second network element.

公开(公告)号：US10063463B2

公开(公告)日：2018-08-28

申请号：US14571848

申请日：2014-12-16

Applicant: Cisco Technology, Inc.

Inventor： Tarek Saad ,  Muthurajah Sivabalan ,  Show Chung Chin

IPC: H04L12/707 ,  H04L12/733 ,  H04L12/723 ,  H04L12/703

CPC classification number: H04L45/22 ,  H04L45/20 ,  H04L45/28 ,  H04L45/50

Abstract: In one embodiment, a device in a segment routed network identifies an adjacency segment between the device and another device in the network. The device also identifies a merge point in the network. A first network path extends between the device and the merge point via the adjacency segment. A bypass network path that does not include the adjacency segment also extends between the device and the merge point. The device generates an interior gateway protocol (IGP) message that identifies the adjacency segment and the merge point. The device provides the IGP message to one or more other devices in the network.

公开(公告)号：US09979629B2

公开(公告)日：2018-05-22

申请号：US14832888

申请日：2015-08-21

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Muthurajah Sivabalan ,  Sami Boutros ,  Peter Psenak ,  Rex Emmanuel Fernando ,  Clarence Filsfils

IPC: H04L12/46 ,  H04L12/751 ,  H04L12/755 ,  H04L12/707 ,  H04L12/715

CPC classification number: H04L45/021 ,  H04L12/4662 ,  H04L45/22 ,  H04L45/64

Abstract: A method and system are disclosed for distributing (advertising) segment identifiers in network functions virtualization and/or software defined networking environments. An exemplary method includes receiving a route advertisement that includes a prefix with a forwarding address for a first network element and receiving a segment identifier (SID) advertisement that includes a prefix SID for the prefix. The route advertisement may be received from a second network element proxying control plane functions for the first network element. Reachability information for the first network element is updated based on the route advertisement and the SID advertisement.

公开(公告)号：US20180109450A1

公开(公告)日：2018-04-19

申请号：US15419819

申请日：2017-01-30

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Clarence Filsfils ,  Arjun Sreekantiah ,  Stefano B. Previdi ,  Muthurajah Sivabalan

IPC: H04L12/741 ,  H04L12/723

CPC classification number: H04L45/74 ,  H04L45/04 ,  H04L47/125

Abstract: Embodiments of the present disclosure provide a set of extensions to enable BGP to setup and maintain flexible Segment Routed Traffic Engineered (SR-TE) policies. Embodiments of the present disclosure further propose a new approach for steering traffic onto SR-TE paths on a per-prefix basis without deploying the existing complex mechanisms.

公开(公告)号：US20170230274A1

公开(公告)日：2017-08-10

申请号：US15426911

申请日：2017-02-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Clarence Filsfils ,  Bertrand Duvivier ,  Muthurajah Sivabalan

IPC: H04L12/751 ,  H04L12/46 ,  H04L12/803 ,  H04L12/741 ,  H04L12/851

CPC classification number: H04L45/02 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/42 ,  H04L45/48 ,  H04L45/74 ,  H04L47/125 ,  H04L47/2425

Abstract: Embodiments of the present disclosure relate to methods and systems for on-demand next-hop resolution. Aspects of the embodiments include receiving a triggering event to prompt a request for a path to a network location; requesting a path computation from a second network element based on receiving the triggering event; receiving the path computation from the second network element; and programming an output interface with an indication of the path computation received from the second network element.

公开(公告)号：US09634929B2

公开(公告)日：2017-04-25

申请号：US14563979

申请日：2014-12-08

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Yuri Tsier ,  Muthurajah Sivabalan ,  Pradosh Mohapatra ,  Clarence Filsfils ,  John H. W. Bettink ,  Luca Martini

IPC: H04L12/723 ,  H04L12/715 ,  H04L12/18

CPC classification number: H04L45/502 ,  H04L12/18 ,  H04L45/04

Abstract: In one embodiment, an access component of a local network edge device receives traffic, and generates a frame for the traffic that includes a remote context label that identifies an access component of the remote network edge device to which the traffic is to be forwarded upon arrival at the remote network edge device, and a virtual circuit label corresponding to a particular virtual service of the traffic. The local network edge device forwards the frame towards the remote network edge device. In another embodiment, the frame may be received at a core component of the remote network edge device, an in response to the remote context label identifying an access component of the remote network edge device, forwarded to the access component, which determines the particular virtual service, and forwards the traffic from the frame out the access component towards an endpoint for the traffic.

公开(公告)号：US20150117222A1

公开(公告)日：2015-04-30

申请号：US14067023

申请日：2013-10-30

Applicant: Cisco Technology, Inc.

Inventor： Tarek Saad ,  Muthurajah Sivabalan ,  Rakesh Gandhi

IPC: H04L12/729

CPC classification number: H04L45/125 ,  H04L45/1283 ,  H04L45/22

Abstract: At a first network device, a plurality of paths through a network from a source network device to a destination network device are determined. A vacant bandwidth is calculated for each of the plurality of paths. A primary path is selected from the plurality of paths based on the vacant bandwidth, and a standby path is selected from the plurality of paths based on the vacant bandwidth.

Abstract translation: 在第一网络设备中，确定通过网络从源网络设备到目的地网络设备的多条路径。 为多个路径中的每一个计算空闲带宽。 基于空闲带宽从多个路径选择主路径，并且基于空闲带宽从多个路径中选择备用路径。

公开(公告)号：US20140143409A1

公开(公告)日：2014-05-22

申请号：US13957533

申请日：2013-08-02

Applicant: Cisco Technology, Inc.

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

IPC: 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：US11438371B2

公开(公告)日：2022-09-06

申请号：US16185168

申请日：2018-11-09

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Robert Edgar Barton ,  Jerome Henry ,  Muthurajah Sivabalan

IPC: H04L9/00 ,  H04L9/40 ,  H04L47/125

Abstract: First data indicative of information that a packet is part of a DDoS attack is received at a management network device. A DDoS remediation network device to be used for remediation of packets associated with the DDoS attack is determined from the first data. Second data, indicative of the DDoS attack and indicative of the DDoS remediation network device, is transmitted from the management network device to an edge network device. The second data is configured to cause the edge network device to route packets associated with the DDoS attack to the DDoS remediation network device.