公开(公告)号：EP3042477A1

公开(公告)日：2016-07-13

申请号：EP14841805.6

申请日：2014-06-13

申请人： NEC Laboratories America, Inc.

发明人： LUMEZANU, Cristian ,  YU, Curtis ,  SHARMA, Abhishek ,  JIANG, Guofei ,  XU, Qiang

IPC分类号： H04L12/801 ,  H04L12/931 ,  H04L12/26

CPC分类号： H04L43/106 ,  H04L43/0852

摘要： In a software defined network having switches including first and last switches and intermediate switches, wherein a default routing path exists between the first and last switches, a system and method are provided for computing path latency. The method includes inserting a respective monitoring rule(s) in each switch, mandating for each switch, forwarding a received rule matching packet to a next switch, and further mandating for the first switch and the last switch, sending a PacketIn message to a controller. The method includes inserting, in each switch, a respective monitoring probe(s) matching the respective monitoring rule(s) in a same switch to initiate mandates specified by the respective monitoring rule(s) in the same switch responsive to an arrival of the packet thereat. The method includes time-stamping the PacketIn messages to generate PacketIn timestamps, aggregating the PacketIn timestamps, and estimating the path latency from an aggregation of PacketIn timestamps.

公开(公告)号：EP3186932A1

公开(公告)日：2017-07-05

申请号：EP15835856.4

申请日：2015-08-21

申请人： NEC Laboratories America, Inc.

发明人： LUMEZANU, Cristian ,  JIN, Cheng ,  ZHANG, Hui ,  SHARMA, Abhishek ,  XU, Qiang ,  ARORA, Nipun ,  JIANG, Guofei

IPC分类号： H04L12/721 ,  H04L12/761 ,  H04L12/937 ,  H04L12/64

摘要： Systems and methods for controlling legacy switch routing in one or more hybrid networks of interconnected computers and switches, including generating a network underlay for the one or more hybrid networks by generating a minimum spanning tree (MST) and a forwarding graph (FWG) over a physical network topology of the one or more hybrid networks, determining an optimal path between hosts on the FWG by optimizing an initial path with a minimum cost mapping, and adjusting the initial path to enforce the optimal path by generating and installing special packets in one or more programmable switches to trigger installation of forwarding rules for one or more legacy switches.

摘要翻译： 用于控制互连计算机和交换机的一个或多个混合网络中的传统交换机路由的系统和方法，包括通过在一个或多个混合网络上生成最小生成树（MST）和转发图（FWG）来生成一个或多个混合网络的网络底层 一个或多个混合网络的物理网络拓扑，通过使用最小成本映射优化初始路径来确定FWG上的主机之间的最佳路径，并且通过在一个或多个混合网络中生成并安装特定分组来调整初始路径以实施最佳路径，或 更多可编程交换机来触发安装一个或多个传统交换机的转发规则。

公开(公告)号：EP3183848A1

公开(公告)日：2017-06-28

申请号：EP15833008.4

申请日：2015-08-20

申请人： NEC Laboratories America, Inc.

发明人： XU, Qiang ,  LUMEZANU, Cristian ,  LIU, Zhuotao ,  ARORA, Nipun ,  SHARMA, Abhishek ,  ZHANG, Hui ,  JIANG, Guofei

IPC分类号： H04L12/751 ,  G06F9/455

CPC分类号： H04L41/12 ,  G06F9/45533 ,  H04L41/083 ,  H04L43/087 ,  H04L45/02 ,  H04L45/121 ,  H04L45/123 ,  H04L45/124

摘要： Systems and methods for decoupled searching and optimization for one or more data centers, including determining a network topology for one or more networks of interconnected computer systems embedded in the one or more data center, searching for routing candidates based on a network topology determined, and updating and applying one or more objective functions to the routing candidates to determine an optimal routing candidate to satisfy embedding goals based on tenant requests, and to embed the optimal routing candidate in the one or more data centers.

摘要翻译： 用于对一个或多个数据中心进行解耦搜索和优化的系统和方法，包括确定嵌入在一个或多个数据中心中的互连计算机系统的一个或多个网络的网络拓扑，基于确定的网络拓扑搜索路由候选，以及 更新并将一个或多个目标函数应用于路由候选者以基于租户请求确定最佳路由候选者以满足嵌入目标，并且将最佳路由候选者嵌入到一个或多个数据中心中。