公开(公告)号：US08355630B1

公开(公告)日：2013-01-15

申请号：US13475667

申请日：2012-05-18

申请人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

发明人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

IPC分类号： H04B10/08

CPC分类号： H04B10/0771

摘要： A system and method of detecting polarity inversion in an optical switching circuit is disclosed. The method includes performing a first round of a port verification process on at least two optical ports, transmitting a payload from at least one optical port in the at least two optical ports, determining if the payload was received at a second optical port in the at least two optical ports, assigning a pair of ports to a first group in the case that the predetermined payload was communicated between the pair of ports, and assigning a pair of ports to a second group in the case that the predetermined payload was not communicated between the pair of ports. The method also includes determining that either the first group of ports or the second group of ports has inverted polarity.

摘要翻译： 公开了一种在光开关电路中检测极性反转的系统和方法。 该方法包括在至少两个光学端口上执行端口验证过程的第一轮，从至少两个光学端口中的至少一个光学端口传输有效载荷，确定有效载荷是否在第二个光学端口处被接收 至少两个光学端口，在所述预定有效负载在所述一对端口之间通信的情况下，将一对端口分配给第一组，并且在所述预定有效载荷不在第二组之间传送的情况下，将一对端口分配给第二组 这对端口。 该方法还包括确定第一组端口或第二组端口具有反相极性。

公开(公告)号：US08351782B1

公开(公告)日：2013-01-08

申请号：US13303975

申请日：2011-11-23

申请人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

发明人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

IPC分类号： H04B10/08

CPC分类号： H04B10/0771

摘要： A system and method of detecting polarity inversion in an optical switching circuit is disclosed. The method includes performing a first round of a port verification process on at least two optical ports, transmitting a payload from at least one optical port in the at least two optical ports, determining if the payload was received at a second optical port in the at least two optical ports, assigning a pair of ports to a first group in the case that the predetermined payload was communicated between the pair of ports, and assigning a pair of ports to a second group in the case that the predetermined payload was not communicated between the pair of ports. The method also includes determining that either the first group of ports or the second group of ports has inverted polarity.

公开(公告)号：US09319264B1

公开(公告)日：2016-04-19

申请号：US13547949

申请日：2012-07-12

申请人： Leon Poutievski ,  Amin Vahdat ,  Ashish Naik

发明人： Leon Poutievski ,  Amin Vahdat ,  Ashish Naik

IPC分类号： H04L12/28 ,  H04L29/08 ,  H04L12/24

CPC分类号： H04L29/08315 ,  H04L41/082 ,  H04L41/12 ,  H04L45/02 ,  H04L45/64

摘要： Network performance may be improved by adjusting a logical network topology while avoiding attendant disruptions. By identifying an alternative logical topology, routing network traffic away from links that will be eliminated from the alternative logical topology, and updating a traffic routing plan upon the adoption of the alternative logical topology, a network may adopt a more efficient topology without misdirecting network traffic.

摘要翻译： 通过调整逻辑网络拓扑同时避免服务中断，可以提高网络性能。 通过识别替代逻辑拓扑，将路由网络流量远离将从替代逻辑拓扑中消除的链路，并且在采用替代逻辑拓扑时更新流量路由计划，网络可采用更有效的拓扑，而不会误导网络流量 。

公开(公告)号：US08904041B1

公开(公告)日：2014-12-02

申请号：US13460063

申请日：2012-04-30

申请人： Leon Poutievski ,  Barry Friedman ,  Amin Vahdat

发明人： Leon Poutievski ,  Barry Friedman ,  Amin Vahdat

IPC分类号： G06F15/16

CPC分类号： H04L61/103 ,  H04L49/25 ,  H04L61/2007 ,  H04L61/2038 ,  H04L61/6068

摘要： A system, apparatus, and method for link layer address resolution of overlapping network addresses is disclosed. In one aspect, the method performed on a first device includes receiving a first address resolution request from a second device, the first address resolution request having a sender network address and a target network address, wherein the target network address is an overlapping network address that is a gateway address of the second device and a network address of a third device, creating a first address resolution response having a sender link layer address associated with the first device, and sending the first address resolution response to the second device.

摘要翻译： 公开了一种用于重叠网络地址的链路层地址解析的系统，装置和方法。 一方面，在第一设备上执行的方法包括从第二设备接收第一地址解析请求，所述第一地址解析请求具有发送方网络地址和目标网络地址，其中所述目标网络地址是重叠的网络地址， 是第二设备的网关地址和第三设备的网络地址，创建具有与第一设备相关联的发送者链路层地址的第一地址解析响应，以及向第二设备发送第一地址解析响应。

公开(公告)号：US08676004B1

公开(公告)日：2014-03-18

申请号：US13402855

申请日：2012-02-22

申请人： Ryohei Urata ,  Leon Poutievski ,  Amin Vahdat ,  Hong Liu ,  Xiaoxue Zhao ,  Cedric Fung Lam

发明人： Ryohei Urata ,  Leon Poutievski ,  Amin Vahdat ,  Hong Liu ,  Xiaoxue Zhao ,  Cedric Fung Lam

IPC分类号： G02B6/24

CPC分类号： H04Q11/0005 ,  H04Q2011/0035

摘要： Systems and methods for optimizing port usage in an optical circuit switch are disclosed herein. A plurality of optical circulators can be coupled to the plurality of input and output ports of an optical circuit switch. An optical circulator coupled to an input port and an optical circulator coupled to an output port can form a bidirectional pair capable of communicating with any other bidirectional pair of the optical circuit switch. In this regard, the number of bidirectional ports of an optical circuit switch can be increased allowing additional bandwidth to flow through the optical circuit switch. Increasing the efficiency and capabilities of optical circuit switches within a large scale communications network can offer increased functionality and performance with little trade off.

摘要翻译： 本文公开了用于优化光电开关中的端口使用的系统和方法。 多个光循环器可以耦合到光电开关的多个输入和输出端口。 耦合到输入端口的光循环器和耦合到输出端口的光循环器可以形成能够与光电路开关的任何其它双向对通信的双向对。 在这方面，可以增加光学电路开关的双向端口的数量，允许额外的带宽流过光电开关。 在大规模通信网络中提高光电开关的效率和能力可以提供更多的功能和性能，几乎没有什么折衷。

公开(公告)号：US09461915B1

公开(公告)日：2016-10-04

申请号：US13358966

申请日：2012-01-26

申请人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

发明人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

IPC分类号： H04L12/891 ,  H04L12/801 ,  H04L12/803

CPC分类号： H04L47/10 ,  H04L47/125

摘要： The present technology considers network devices that include forwarding tables having a number of next-hop entries (e.g., egress ports) where it is possible that the egress port utilization can be load balanced using WCMP groups. To implement a WCMP group, its members are assigned weights representing an amount of data flow to distribute over a plurality of links for a given destination. The members may be replicated in a forwarding table proportionally to their assigned weights. This disclosure provides systems and methods to reduce the number of forwarding table entries required when implementing a WCMP group.

摘要翻译： 本技术考虑了包括具有多个下一跳条目（例如出口端口）的转发表的网络设备，其中出口端口利用可以使用WCMP组进行负载平衡。 为了实现WCMP组，其成员被分配权重，其表示在给定目的地的多个链路上分发的数据流量。 成员可以在转发表中与其分配的权重成比例地复制。 本公开提供了用于减少实现WCMP组所需的转发表条目数量的系统和方法。

公开(公告)号：US08867915B1

公开(公告)日：2014-10-21

申请号：US13342784

申请日：2012-01-03

申请人： Amin Vahdat ,  Xiaoxue Zhao ,  Paul Germano ,  Bikash Koley ,  Hong Liu

发明人： Amin Vahdat ,  Xiaoxue Zhao ,  Paul Germano ,  Bikash Koley ,  Hong Liu

IPC分类号： H04J14/00

CPC分类号： H04B10/27 ,  H04Q11/0005 ,  H04Q11/0071 ,  H04Q2011/0052 ,  H04Q2011/0083 ,  H04Q2213/1301

摘要： A system and method of providing a dynamic optical network topology according to topology determinations made by a network control is disclosed. The system and method includes optical ports on an optical circuit switch system operably connected to a plurality of server groups, and optical ports on the optical circuit switch system operably connected to a plurality of packet processing nodes. The system and method also includes at least one memory and at least one processor to execute network control software to receive input comprising a bandwidth request, determine an output comprising a preferred optical link topology for the optical circuit switch system based on the received input, convert the optical link topology for the optical circuit switch system into optical circuit switch port mapping, and send the optical circuit switch port mapping to the optical circuit switch system and to the packet processing nodes.

摘要翻译： 公开了根据由网络控制进行的拓扑确定提供动态光网络拓扑的系统和方法。 该系统和方法包括可操作地连接到多个服务器组的光学电路交换系统上的光学端口和可操作地连接到多个分组处理节点的光学电路交换系统上的光学端口。 该系统和方法还包括至少一个存储器和至少一个处理器，用于执行网络控制软件以接收包括带宽请求的输入，基于所接收的输入确定包括用于光电路交换系统的优选光链路拓扑的输出，转换 将光电开关系统的光链路拓扑转换成光电路交换机端口映射，并将光电路交换机端口映射发送给光电路交换系统和分组处理节点。

公开(公告)号：US09225454B1

公开(公告)日：2015-12-29

申请号：US13282229

申请日：2011-10-26

申请人： Hong Liu ,  Amin Vahdat ,  Ryohei Urata ,  Xiaoxue Zhao ,  Chris Johnson

发明人： Hong Liu ,  Amin Vahdat ,  Ryohei Urata ,  Xiaoxue Zhao ,  Chris Johnson

IPC分类号： H04J14/02

CPC分类号： H04J14/02

摘要： The specification describes an apparatus including a plurality of communication ports, each communication port coupled to a corresponding networking element, and a plurality of optical transceivers, each optical transceiver coupled to a corresponding communication port and including an optical receiver and an optical transmitter, wherein the optical transmitter can transmit an optical data signal having a carrier wavelength different than any other of the plurality of optical transmitters. A passive optical multiplexer/demultiplexer module is coupled to the transceivers and includes an optical multiplexer including a wavelength division multiplexing (WDM) output and a plurality of inputs, each input coupled to one of the plurality of transmitters, and an optical demultiplexer including a WDM input and a plurality of outputs, each output coupled to one of the plurality of receivers. Placing the passive optical multiplexer and demultiplexer external to the optical transceivers creates an aggregation/de-aggregation point with extremely low fault probability.

摘要翻译： 本说明书描述了一种包括多个通信端口，耦合到对应的网络元件的每个通信端口和多个光收发器的设备，每个光收发器耦合到对应的通信端口并且包括光接收器和光发射器，其中， 光发射机可以发射具有不同于多个光发射机中任何其它的载波波长的光数据信号。 无源光复用器/解复用器模块耦合到收发器，并且包括光复用器，其包括波分多路复用（WDM）输出和多个输入，每个输入耦合到所述多个发射机之一，以及光解复用器，包括WDM 输入和多个输出，每个输出耦合到所述多个接收器中的一个。 将无源光复用器和解复用器放置在光收发器外部，创建具有极低故障概率的聚合/解聚合点。

公开(公告)号：US09083626B1

公开(公告)日：2015-07-14

申请号：US14244367

申请日：2014-04-03

申请人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

发明人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

IPC分类号： H04L12/28 ,  H04L12/24 ,  H04L12/46

CPC分类号： H04L47/125 ,  H04L12/28 ,  H04L12/46 ,  H04L12/462 ,  H04L41/12 ,  H04L45/24 ,  H04L49/1507 ,  H04L49/1515 ,  H04L49/25 ,  H04L49/3009 ,  H04L49/65

摘要： A multi-stage network is provided, where the network includes a first stage comprising a first plurality of network switching devices, the first plurality of network devices being classified into switching groups. The network further includes a second stage comprising a second plurality of network switching devices. A linking configuration, comprising a plurality of links between the first plurality of network switching devices and the second plurality of network switching devices, couples the first stage to the second stage. Each first stage network switching device in a given switching group includes the same number of links to any given second stage network switching device as each other first stage network switching device in that group.

摘要翻译： 提供了多级网络，其中网络包括包括第一多个网络交换设备的第一级，第一多个网络设备被分类为交换组。 网络还包括包括第二多个网络交换设备的第二阶段。 一种链接配置，包括第一多个网络交换设备和第二多个网络交换设备之间的多个链路，将第一阶段耦合到第二阶段。 给定交换组中的每个第一级网络交换设备包括与该组中的每个其他第一级网络交换设备相同数量的到任何给定的第二级网络交换设备的链路数量。

公开(公告)号：US08902751B1

公开(公告)日：2014-12-02

申请号：US13358898

申请日：2012-01-26

申请人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

发明人： Junlan Zhou ,  Amin Vahdat ,  Arjun Singh

IPC分类号： H04L12/28 ,  H04L12/46

CPC分类号： H04L12/6418

摘要： A system and method provides for delivering substantially uniform performance to all hosts in a network while minimizing a total number of switches required to deliver that performance. In a multi-stage network having a plurality of switches in a first tier and a plurality of switches in a second tier, additional switches may be deployed in the second tier to alleviate problems occurring as a result of uneven striping. A minimum number of second tier switches to be deployed may be determined as a function of a target level of throughput, for example, when using WCMP flow distribution.

摘要翻译： 一种系统和方法提供了向网络中的所有主机提供基本均匀的性能，同时最小化递送该性能所需的交换机总数。 在具有第一层中的多个交换机和第二层中的多个交换机的多级网络中，可以在第二层中部署附加的交换机以减轻由于条纹不均匀而出现的问题。 可以将例如在使用WCMP流量分配时，要部署的最小数目的第二层交换机作为目标吞吐量水平来确定。