公开(公告)号：US09137140B2

公开(公告)日：2015-09-15

申请号：US14022503

申请日：2013-09-10

Applicant: Cisco Technology, Inc.

Inventor： Gaofeng Tao ,  Alan Xiao-rong Wang ,  Yu Zhang ,  Dapeng Liu

IPC: H04L12/751 ,  H04L12/24 ,  H04W36/38 ,  H04W76/02

CPC classification number: H04L45/02 ,  H04L41/0816 ,  H04W36/18 ,  H04W36/385 ,  H04W76/12

Abstract: A software defined network controller detects when a host has moved between network elements in a network. The controller generates a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list. The controller updates the root network element in the list first for traffic flow associated with the host. The controller sends commands to the network elements to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.

Abstract translation: 软件定义的网络控制器检测主机何时在网络中的网元之间移动。 控制器生成主机已经漫游的网元的列表，该列表按主机被附加到网络元件的时间进行排序，使得主机附加的最新网络元素是根网元，并且在 名单的头。 控制器首先更新列表中的根网元，以便与主机相关联的流量。 控制器向网络元件发送命令以将隧道从列表中的每个先前连接网络元素编程到列表中的最新根网元件，其顺序与漫游路径相反，以便经由 隧道。

公开(公告)号：US20240056373A1

公开(公告)日：2024-02-15

申请号：US18099104

申请日：2023-01-19

Applicant: Cisco Technology, Inc.

Inventor： Jianda Liu ,  Xiao-Rong Wang ,  Hongbo Xia ,  Jiayi You ,  Yu Zhang

IPC: H04L43/10 ,  H04L43/0876

CPC classification number: H04L43/10 ,  H04L43/0876

Abstract: Techniques and architecture are described for tracking flows of packets in a network using a packet color marking scheme for obtaining network end-to-end traffic flow metrics in the network. In particular, in configurations, a user may be prompted to specify a site and a virtual private network (VPN) at which to start a trace for packet flows using a coloring marking scheme within the network. Given the VPN and the site, it is possible to monitor interested packet flows and apply metadata, e.g., colors, on flow packets. Remote wide area network (e.g., software defined WAN (SD-WAN)) routers receiving the packets with metadata may automatically trace the same flow and apply the same metadata to a next hop router. Hence, an end-to-end network path may be discovered.

公开(公告)号：US20220263761A1

公开(公告)日：2022-08-18

申请号：US17734566

申请日：2022-05-02

Applicant: Cisco Technology, Inc.

Inventor： Hongbo Xia ,  Xiaorong Wang ,  Yu Zhang ,  Changhong Shen

IPC: H04L47/22 ,  H04L47/24 ,  H04L47/34

Abstract: In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

公开(公告)号：US20210385166A1

公开(公告)日：2021-12-09

申请号：US16891624

申请日：2020-06-03

Applicant: Cisco Technology, Inc.

Inventor： Hongbo Xia ,  Xiaorong Wang ,  Yu Zhang ,  Changhong Shen

IPC: H04L12/815 ,  H04L12/801 ,  H04L12/851

Abstract: In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

公开(公告)号：US11190434B2

公开(公告)日：2021-11-30

申请号：US16819940

申请日：2020-03-16

Applicant: Cisco Technology Inc.

Inventor： Changhong Shen ,  Hongbo Xia ,  Xiao-Rong Wang ,  Yu Zhang

IPC: H04L12/26

Abstract: The present disclosure is directed to determining bandwidth capacity in a WAN path and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations including, selecting a SD-WAN path for which to determine bandwidth capacity, wherein the path is associated with a Quality of Service (QoS) shaper having a pre-determined shaper rate, incrementally increasing a test load applied on the selected path, wherein the test load is applied concurrently with existing user traffic, calculating a performance score for the path after each increase in the test load, determining a performance of the path based on the calculated performance score, and updating the shaper rate of the QoS shaper based on the performance of the path.

公开(公告)号：US20210288898A1

公开(公告)日：2021-09-16

申请号：US16819940

申请日：2020-03-16

Applicant: Cisco Technology Inc.

Inventor： Changhong Shen ,  Hongbo Xia ,  Xiao-Rong Wang ,  Yu Zhang

IPC: H04L12/26

Abstract: The present disclosure is directed to determining bandwidth capacity in a WAN path and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations including, selecting a SD-WAN path for which to determine bandwidth capacity, wherein the path is associated with a Quality of Service (QoS) shaper having a pre-determined shaper rate, incrementally increasing a test load applied on the selected path, wherein the test load is applied concurrently with existing user traffic, calculating a performance score for the path after each increase in the test load, determining a performance of the path based on the calculated performance score, and updating the shaper rate of the QoS shaper based on the performance of the path.

公开(公告)号：US20160065455A1

公开(公告)日：2016-03-03

申请号：US14472469

申请日：2014-08-29

Applicant: Cisco Technology, Inc.

Inventor： Alan Xiao-rong Wang ,  Dapeng Liu ,  Yu Zhang ,  Gaofeng Tao

IPC: H04L12/721 ,  H04L12/733 ,  H04L12/715 ,  H04L29/08 ,  H04L12/851 ,  H04L12/859

CPC classification number: H04L45/38 ,  H04L45/04 ,  H04L45/20 ,  H04L47/2441 ,  H04L47/2475

Abstract: Techniques whereby a LAN-side border router observes all packets of an application flow from both directions so that the application recognition performed on the LAN-side border router functions properly. A border router may implement flags in a flow cache to indicate whether the border router is the LAN-side border router and/or a WAN-side border router for an application flow. As packets are received at a border router at either the LAN interface or WAN interface, the flags associated with packet's application flows are examined to determine if the border router is the LAN-side border router for the application flow. If so, then application recognition and routing control may be performed. If not, the packet may be redirected to another border router that may be the LAN-side border router or the WAN-side border router for the application flow to insure that border router observes the packet.

Abstract translation: LAN侧边界路由器从两个方向观察应用流的所有分组的技术，使得在LAN侧边界路由器上执行的应用识别功能正常工作。 边界路由器可以在流缓存中实现标志，以指示边界路由器是否是用于应用流的LAN侧边界路由器和/或WAN侧边界路由器。 当分组在LAN接口或WAN接口处的边界路由器处被接收时，检查与分组的应用流相关联的标志，以确定边界路由器是否是应用流的LAN侧边界路由器。 如果是这样，则可以执行应用识别和路由控制。 如果不是，则该分组可以被重定向到可能是用于该应用流的LAN侧边界路由器或WAN侧边界路由器的另一边界路由器，以确保边界路由器观察该分组。

公开(公告)号：US11329924B2

公开(公告)日：2022-05-10

申请号：US16891624

申请日：2020-06-03

Applicant: Cisco Technology, Inc.

Inventor： Hongbo Xia ,  Xiaorong Wang ,  Yu Zhang ,  Changhong Shen

IPC: H04L12/815 ,  H04L47/22 ,  H04L47/24 ,  H04L47/34

Abstract: In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

公开(公告)号：US09699603B2

公开(公告)日：2017-07-04

申请号：US14882670

申请日：2015-10-14

Applicant: Cisco Technology, Inc.

Inventor： Zhitao Shen ,  David Tang ,  Hao Liu ,  Yu Zhang

IPC: H04W4/02 ,  H04W24/02 ,  H04W84/12

CPC classification number: H04W4/02 ,  H04W24/02 ,  H04W24/04 ,  H04W84/12

Abstract: According to the techniques presented herein, location data from signals transmitted by a plurality of mobile wireless devices in a wireless network are obtained. For each mobile wireless device, location data time points are aggregated to generate a plurality of routines or paths of movement for each mobile wireless device within a predefined space. The predefined space is partitioned into a plurality of units and each routine of the plurality of routines is also partitioned into a plurality of subroutines or segments. For each unit, one or more subroutines within a predefined distance of a frequent subroutine are combined with the frequent subroutine, and the frequent subroutines may be displayed on a graphical interface to visualize aggregate movement of the plurality of mobile wireless devices within the predefined space. Frequent subroutines may be analyzed in an automated manner to generate notifications and alerts.

公开(公告)号：US09699065B2

公开(公告)日：2017-07-04

申请号：US14820730

申请日：2015-08-07

Applicant: Cisco Technology, Inc.

Inventor： Gaofeng Tao ,  Alan Xiao-rong Wang ,  Yu Zhang ,  Dapeng Liu

IPC: H04L12/751 ,  H04L12/24 ,  H04W36/18 ,  H04W36/38 ,  H04W76/02

CPC classification number: H04L45/02 ,  H04L41/0816 ,  H04W36/18 ,  H04W36/385 ,  H04W76/12

Abstract: A software defined network controller detects when a host has moved between network elements in a network. The controller generates a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list. The controller updates the root network element in the list first for traffic flow associated with the host. The controller sends commands to the network elements to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.