公开(公告)号：US10270697B2

公开(公告)日：2019-04-23

申请号：US15647479

申请日：2017-07-12

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Ali Sajassi ,  Samer Salam

IPC: H04L12/24 ,  H04L12/813 ,  H04L12/823 ,  H04L12/801 ,  H04L12/18 ,  H04L12/715 ,  H04L12/46 ,  H04L12/721 ,  H04L12/741 ,  H04L12/753

Abstract: In one embodiment, when an ingress provider edge (PE) device of a computer network domain receives a frame at the ingress PE device destined to a destination media access control (MAC) address, it can determine whether the frame was received on a root or leaf Ethernet ingress segment, and also whether the destination MAC address is located via a root or leaf Ethernet segment. Accordingly, the ingress PE device may either drop or forward the frame based on the ingress Ethernet segment and destination MAC address Ethernet segment being either a root or a leaf, respectively.

公开(公告)号：US20180176096A1

公开(公告)日：2018-06-21

申请号：US15386535

申请日：2016-12-21

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Pavala Manikandaraja Prabakaran ,  Dhivya Pavala Manikandaraja ,  Japan Bhadreshkumar Patel ,  Umakanth Srinivasan ,  Suyog Subhash Belsare ,  Samer Salam

IPC: H04L12/24 ,  H04L12/26 ,  G06F17/30

CPC classification number: H04L41/145 ,  H04L41/12

Abstract: In one embodiment, a method includes processing network data models at a network device configured to operate in a network comprising one or more network components associated with one of the network data models, generating representations of the network data models, the representations comprising labels for elements in the network data models, comparing the labels associated with leaf nodes of the network data models to identify matching leaf nodes, comparing the labels associated with parent nodes of the matching leaf nodes to identify a strength of matching, and mapping at least two of the network data models at the network device based on the strength of matching for use in a network application. An apparatus and logic are also disclosed herein.

公开(公告)号：US20170317917A1

公开(公告)日：2017-11-02

申请号：US15654054

申请日：2017-07-19

Applicant: Cisco Technology, Inc.

Inventor： Norman W. Finn ,  Samer Salam ,  John Monaghan ,  Iain McDade ,  David Alexander Ball ,  Simon Chatterjee

IPC: H04L12/751 ,  H04L12/26 ,  H04L12/24 ,  H04L12/721 ,  H04L12/46

CPC classification number: H04L45/02 ,  H04L12/462 ,  H04L41/12 ,  H04L43/10 ,  H04L45/26

Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.

公开(公告)号：US20170116526A1

公开(公告)日：2017-04-27

申请号：US14924460

申请日：2015-10-27

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Samer Salam

IPC: G06N5/00

CPC classification number: G06N5/022 ,  G06N5/003

Abstract: In one embodiment, a method includes identifying at a network device, metrics associated with constraints of an optimization problem, receiving values for the metrics from a stream reasoner, obtaining an initial solution of the optimization problem from a linear programming solver based on the values of the metrics, and instructing the linear programming solver to calculate a new solution to the optimization problem when the stream reasoner indicates that the constraints of the optimization problem are violated. An apparatus and logic are also disclosed herein.

公开(公告)号：US09559951B1

公开(公告)日：2017-01-31

申请号：US14013201

申请日：2013-08-29

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samer Salam

IPC: H04L12/721

CPC classification number: H04L45/66

Abstract: In one embodiment, a method includes a method includes obtaining traffic, determining a host Media Access Control (MAC) address, and determining a host Internet Protocol (IP) address using the traffic. The method also includes generating an Ethernet virtual private network (E-VPN) MAC route advertisement that includes both the host MAC address and the host IP address and generating an IP virtual private network (IP-VPN) route advertisement that includes the host IP address.

Abstract translation: 在一个实施例中，一种方法包括一种方法，包括获得业务，确定主机媒体接入控制（MAC）地址，以及使用该业务来确定主机因特网协议（IP）地址。 该方法还包括生成包括主机MAC地址和主机IP地址的以太网虚拟专用网（E-VPN）MAC路由通告，并生成包括主机IP地址的IP虚拟专用网（IP-VPN）路由通告 。

公开(公告)号：US20150382229A1

公开(公告)日：2015-12-31

申请号：US14844448

申请日：2015-09-03

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shwetha Subray Bhandari ,  Samer Salam ,  Kannan Jayaraman ,  Arvind Saproo

IPC: H04W28/02 ,  H04L12/751 ,  H04W24/02

CPC classification number: H04W28/0236 ,  H04L45/02 ,  H04W24/02 ,  H04W40/12

Abstract: A method is provided in one example and includes receiving a current bandwidth characteristic for a link, where the current bandwidth characteristic is determined under fading conditions associated with signal propagation on the link. The method can also include calculating a new cost for the link that is different from a nominal cost associated with a nominal bandwidth of the link without the fading conditions. The method could also include routing at least a portion of a plurality of flows that are to traverse the link away from the link based, at least in part, on the new cost. Another example method includes receiving the current bandwidth characteristic for the link, comparing the current bandwidth characteristic with a preconfigured low watermark corresponding to a class-specific MTR topology associated with a class of traffic traversing the link, and removing the link from the MTR topology based on the current bandwidth characteristic.

Abstract translation: 在一个示例中提供了一种方法，并且包括接收用于链路的当前带宽特性，其中在与链路上的信号传播相关联的衰落条件下确定当前带宽特性。 该方法还可以包括计算不同于没有衰落条件的与链路的标称带宽相关联的名义成本的链路的新成本。 该方法还可以包括至少部分地基于新成本路由将要从链路横越链路的多个流的至少一部分路由。 另一示例性方法包括：接收当前带宽特性，将当前带宽特性与对应于与通过链路的一类流量相关联的类特定MTR拓扑相对应的预配置低水印，以及从基于MTR拓扑的链路中移除链路 关于当前的带宽特性。

公开(公告)号：US20150281096A1

公开(公告)日：2015-10-01

申请号：US14231853

申请日：2014-04-01

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Ali Sajassi ,  Samer Salam

IPC: H04L12/813 ,  H04L12/823 ,  H04L12/24 ,  H04L12/801

CPC classification number: H04L47/20 ,  H04L12/1886 ,  H04L12/462 ,  H04L41/12 ,  H04L45/04 ,  H04L45/48 ,  H04L45/54 ,  H04L45/66 ,  H04L47/16 ,  H04L47/32 ,  H04L47/33

Abstract: In one embodiment, when an ingress provider edge (PE) device of a computer network domain receives a frame at the ingress PE device destined to a destination media access control (MAC) address, it can determine whether the frame was received on a root or leaf Ethernet ingress segment, and also whether the destination MAC address is located via a root or leaf Ethernet segment. Accordingly, the ingress PE device may either drop or forward the frame based on the ingress Ethernet segment and destination MAC address Ethernet segment being either a root or a leaf, respectively.

Abstract translation: 在一个实施例中，当计算机网络域的入口提供商边缘（PE）设备接收到目的地媒体访问控制（MAC）地址的入口PE设备处的帧时，它可以确定该帧是否被接收到根或者 叶子以太网入口段，以及目的地MAC地址是否通过根或叶以太网段来定位。 因此，入口PE设备可以基于入口以太网段和目的地MAC地址以太网段分别是根或叶来丢弃或转发帧。

公开(公告)号：US09019840B2

公开(公告)日：2015-04-28

申请号：US13846201

申请日：2013-03-18

Applicant: Cisco Technology, Inc.

Inventor： Samer Salam ,  Wojciech Dec

IPC: H04L12/26 ,  H04L29/12

CPC classification number: H04L61/10 ,  H04L43/0811 ,  H04L43/10

Abstract: In one embodiment, an aggregation device is configured to aggregate traffic of a plurality of customer edge (CE) devices into a single bridge-domain. The aggregation device receives connectivity fault management (CFM) packets of a CFM protocol from the plurality of CE devices. Each received CFM packet includes a media access control (MAC) address of an access port of the CE device from which the CFM packet was transmitted. The aggregation device detects conflicting MAC addresses between access ports of CE devices by comparing MAC addresses of the received CFM packets. The aggregation device notifies one or more of the plurality of CE devices of the conflict.

Abstract translation: 在一个实施例中，聚合设备被配置为将多个客户边缘（CE）设备的业务聚合成单个桥域。 聚合设备从多个CE设备接收CFM协议的连接故障管理（CFM）报文。 每个接收到的CFM分组包括从其发送CFM分组的CE设备的接入端口的媒体访问控制（MAC）地址。 聚合设备通过比较接收到的CFM报文的MAC地址来检测CE设备的接入端口之间的冲突MAC地址。 聚合设备通知多个CE设备中的一个或多个冲突。

公开(公告)号：US09001644B2

公开(公告)日：2015-04-07

申请号：US13769474

申请日：2013-02-18

Applicant: Cisco Technology, Inc.

Inventor： Samer Salam ,  Ali Sajassi ,  Sami Boutros

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/437

CPC classification number: H04L41/0677 ,  H04L12/437 ,  H04L41/0659

Abstract: In one embodiment, a method includes obtaining a first indication from a first source included in an Ethernet ring and obtaining a second indication from a second source associated with a provider edge (PE) node The method also includes determining when the first indication and the second indication are indicative of a direct failure of the PE node and determining when the first indication and the second indication are indicative of a ring partition failure associated with the Ethernet ring. The direct failure of the PE node is identified when it is determined that the first indication and the second indication are indicative of the direct failure of the PE node, and the ring partition failure associated with the Ethernet ring is identified when it is determined that the first indication and the second indication are indicative of the ring partition failure associated with the Ethernet ring.

Abstract translation: 在一个实施例中，一种方法包括从包括在以太网环中的第一源获得第一指示，并且从与提供商边缘（PE）节点相关联的第二源获得第二指示。该方法还包括确定何时第一指示和第二指示 指示表示PE节点的直接故障，并且确定何时第一指示和第二指示指示与以太网环相关联的环分区故障。 当确定第一指示和第二指示指示PE节点的直接故障时，识别PE节点的直接故障，并且当确定与以太网环相关联的环分区故障被确定为 第一指示和第二指示指示与以太网环相关联的环分区故障。

公开(公告)号：US20140355447A1

公开(公告)日：2014-12-04

申请号：US13903767

申请日：2013-05-28

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Pravin K. Gohite ,  Samer Salam

IPC: H04W28/02 ,  H04W40/34

CPC classification number: H04W40/34 ,  H04L45/125 ,  H04L45/22 ,  H04W40/12

Abstract: A method provided in one example embodiment includes detecting a first current bandwidth of a first link in a network ring, where the first current bandwidth indicates a signal degradation on the first link. The method also includes determining whether the first current bandwidth has degraded more than a second current bandwidth of a second link in the network ring, where the second current bandwidth indicates a signal degradation on the second link. The method further includes routing one or more network flows away from the first link if the first current bandwidth has degraded more than the second current bandwidth.

Abstract translation: 在一个示例实施例中提供的方法包括检测网络环中的第一链路的第一当前带宽，其中第一当前带宽指示第一链路上的信号劣化。 所述方法还包括确定所述第一当前带宽是否已经比所述网络环中的第二链路的第二当前带宽降级，其中所述第二当前带宽指示所述第二链路上的信号劣化。 该方法还包括如果第一当前带宽已经比第二当前带宽降级，则将一个或多个网络流远离第一链路路由。