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1. 发明授权

US10250529B2 Systems and methods for performing logical network forwarding using a controller 有权
公开(公告)号：US10250529B2
公开(公告)日：2019-04-02
申请号：US14337178
申请日：2014-07-21
申请人： Big Switch Networks, Inc.
发明人： Gregor Mathias Maier , Vishnu Emmadi , Sudeep Dilip Modi , Kanzhe Jiang , Kuang-Ching Wang , Srinivasan Ramasubramanian , Mei Yang , Robert W. Sherwood , Mandeep Singh Dhami
IPC分类号： H04L12/713 , H04L12/717 , H04L12/931
摘要： A controller implemented on computing equipment may be used to control switches in a network. End hosts may be coupled to the switches. The controller may generate a virtual network topology of virtual switches, virtual routers, and virtual system routers that are distributed over underlying switches in the network. The controller may form virtual switches from respective groups of end hosts, virtual routers from groups of virtual switches that include virtual interfaces that are coupled to virtual switches, and a virtual system router from groups of virtual routers that includes virtual system router interfaces that are coupled to the virtual routers. The controller may control the virtual network topology by generating respective flow table entries based on identified network policies for each of the virtual routers, virtual system routers, and virtual switches. The controller may control the virtual system routers to route packets between the virtual routers.

2. 发明申请

US20150138993A1 SYSTEMS AND METHODS FOR TESTING NETWORKS WITH A CONTROLLER 有权
标题翻译：用控制器测试网络的系统和方法
公开(公告)号：US20150138993A1
公开(公告)日：2015-05-21
申请号：US14085538
申请日：2013-11-20
申请人： Big Switch Networks, Inc.
发明人： R. Kyle Forster , Shudong Zhou , Robert W. Sherwood , Jason Parraga
IPC分类号： H04L12/24
CPC分类号： H04L41/12 , H04L41/24 , H04L43/50
摘要： A controller may control switches such as physical and software switches in a network. The controller may generate virtual switches from groups of end hosts in forming a virtual network topology. The controller may receive one or more network policy rules that govern network traffic through the switches. For a given network policy rule, the controller may perform a test in determining whether the network satisfies the network policy rule. The test may be performed based on a testing rule identifying test parameters and expected test results. The controller may perform tests in determining whether the network satisfies the testing rule and the corresponding network policy rule. The tests may be performed via simulation at the controller or by injecting a tagged test packet into the network.
摘要翻译：控制器可以控制诸如网络中的物理和软件交换机的交换机。控制器可以在形成虚拟网络拓扑结构的情况下从终端主机组生成虚拟交换机。控制器可以接收通过交换机来管理网络流量的一个或多个网络策略规则。对于给定的网络策略规则，控制器可以在确定网络是否满足网络策略规则时执行测试。可以基于识别测试参数和预期测试结果的测试规则来执行测试。控制器可以在确定网络是否满足测试规则和相应的网络策略规则时执行测试。测试可以通过控制器的仿真或通过将标记的测试分组注入网络来执行。

3. 发明申请

US20160020993A1 SYSTEMS AND METHODS FOR PERFORMING DEBUGGING OPERATIONS ON NETWORKS USING A CONTROLLER 有权
标题翻译：使用控制器执行网络调试操作的系统和方法
公开(公告)号：US20160020993A1
公开(公告)日：2016-01-21
申请号：US14626450
申请日：2015-02-19
申请人： Big Switch Networks, Inc.
发明人： Xin Wu , Rajneesh Bajpai , Robert W. Sherwood , Srinivasan Ramasubramanian , Gregor Mathias Maier , Richard Leegan Lane, II , Kenneth Hsinchao Chiang , Mei Yang
IPC分类号： H04L12/721 , H04L12/741
CPC分类号： H04L43/06 , H04L41/0645 , H04L43/026 , H04L43/028 , H04L43/04 , H04L43/0829 , H04L43/0847 , H04L45/14 , H04L45/745 , H04L47/125
摘要： A controller implemented on computing equipment may control switches in a network. The controller may provide flow tables that implement network policies to the switches to control packet forwarding through the network. The controller may provide debug table entries to the switches for use in a debug table that is separate from the flow table. The debug table entries may match incoming network packets and increment corresponding counters on the switches. The controller may retrieve count information from the counters for performing debugging operations on the network. For example, the controller may identify conflicts between fields of a selected flow table entry, determine whether elephant packet flows are present between switches, determine whether desired load balancing is being performed, determine whether a network path has changed, determine whether packet loss has occurred, and/or determine whether network packets are taking undesired paths based on the retrieved count information.
摘要翻译：在计算设备上实现的控制器可以控制网络中的交换机。控制器可以向交换机提供实现网络策略的流表，以控制通过网络的分组转发。控制器可以向交换机提供调试表条目以用于与流表分离的调试表中。调试表项可以匹配进入的网络数据包，并增加交换机上的相应计数器。控制器可以从计数器检索计数信息，以便在网络上执行调试操作。例如，控制器可以识别所选流表条目的字段之间的冲突，确定是否存在交换机之间的大象分组流，确定是否正在执行期望的负载平衡，确定网络路径是否已经改变，确定分组丢失是否已经发生，和/或基于检索到的计数信息来确定网络分组是否正在采取不需要的路径。

4. 发明申请

US20160019044A1 SYSTEMS AND METHODS FOR PERFORMING UNINTERRUPTED NETWORK UPGRADES WITH CONTROLLERS 审中-公开
标题翻译：用于与控制器执行不间断网络升级的系统和方法
公开(公告)号：US20160019044A1
公开(公告)日：2016-01-21
申请号：US14337193
申请日：2014-07-21
申请人： Big Switch Networks, Inc.
发明人： Michael Stolarchuk , Carl D. Roth , Alok Shankar , Robert K. Vaterlaus , Srinivasan Ramasubramanian , Andreas Wundsam , Robert W. Sherwood , Rajneesh Bajpai
IPC分类号： G06F9/445
CPC分类号： G06F8/65 , G06F8/61 , G06F8/63 , H04L41/082 , H04L41/0889 , H04L67/34
摘要： First and second controllers implemented on computing equipment may be used to control switches in a network. The switches may forward network packets between end hosts. The second controller may identify first and second redundant partitions of switches in the network that are each coupled to all of the end hosts. The first controller may instruct the first partition to install software while the second partition forwards network traffic and may instruct the second partition to install software while the first partition forwards network traffic. The first controller may install the software while the second controller is active and the second controller may install the software while the first controller is active. In this way, the switches and controllers may be provided with an uninterrupted software upgrade and packets may be forwarded between end hosts during the software upgrade without introducing packet loss or other noticeable reductions in network performance.
摘要翻译：在计算设备上实现的第一和第二控制器可用于控制网络中的交换机。交换机可以在终端主机之间转发网络数据包。第二控制器可以识别网络中每个耦合到所有终端主机的交换机的第一和第二冗余分区。第一控制器可以指示第一分区安装软件，而第二分区转发网络流量，并可指示第二分区安装软件，同时第一分区转发网络流量。第一控制器可以在第二控制器处于活动状态时安装软件，并且第二控制器可以在第一控制器处于活动状态时安装软件。以这种方式，交换机和控制器可以被提供有不间断的软件升级，并且在软件升级期间可以在端主机之间转发分组，而不会引入分组丢失或其他明显的网络性能降低。

5. 发明授权

US10264040B2 Systems and methods to manage multicast traffic 有权
公开(公告)号：US10264040B2
公开(公告)日：2019-04-16
申请号：US15227856
申请日：2016-08-03
申请人： Big Switch Networks, Inc
发明人： Mary Preeti Manohar , Rajneesh Bajpai , Ning Song , Srinivasan Ramasubramanian , Shunjia Yu , Richard Lane , Kiran Gandhi Poola , Kenneth H. Chiang , Robert W. Sherwood
IPC分类号： H04L29/06 , H04L12/18 , H04L12/761 , H04L12/44 , H04L12/46 , H04L12/755
摘要： In various example embodiments, a system and method for optimizing management of a multicast tree are disclosed. The system receives first multicast group member information, from over a network and via a first packet forwarding system, at a controller server that provides for control of a network comprised of a first virtual local area network including a first packet forwarding system, the first multicast group member information being received by the first packet forwarding system and describing a first end-host computer as joining a first multicast group on the first virtual local area network. The system generates a multicast tree, at the controller server, and communicates a network configuration message to at least one packet forwarding system of a first plurality of packet forwarding systems to enable communication of the multicast traffic for the first multicast group over a portion of the multicast tree.

6. 发明授权

US09600263B2 Systems and methods for performing uninterrupted network upgrades with controllers 有权
公开(公告)号：US09600263B2
公开(公告)日：2017-03-21
申请号：US14337193
申请日：2014-07-21
申请人： Big Switch Networks, Inc.
发明人： Michael Stolarchuk , Carl D. Roth , Alok Shankar , Robert K. Vaterlaus , Srinivasan Ramasubramanian , Andreas Wundsam , Robert W. Sherwood , Rajneesh Bajpai
IPC分类号： G06F9/445 , H04L12/24 , H04L29/08
CPC分类号： G06F8/65 , G06F8/61 , G06F8/63 , H04L41/082 , H04L41/0889 , H04L67/34
摘要： First and second controllers implemented on computing equipment may be used to control switches in a network. The switches may forward network packets between end hosts. The second controller may identify first and second redundant partitions of switches in the network that are each coupled to all of the end hosts. The first controller may instruct the first partition to install software while the second partition forwards network traffic and may instruct the second partition to install software while the first partition forwards network traffic. The first controller may install the software while the second controller is active and the second controller may install the software while the first controller is active. In this way, the switches and controllers may be provided with an uninterrupted software upgrade and packets may be forwarded between end hosts during the software upgrade without introducing packet loss or other noticeable reductions in network performance.

7. 发明授权

US09548896B2 Systems and methods for performing network service insertion 有权
标题翻译：执行网络服务插入的系统和方法
公开(公告)号：US09548896B2
公开(公告)日：2017-01-17
申请号：US14142283
申请日：2013-12-27
申请人： Big Switch Networks, Inc.
发明人： Sumit Arun Naiksatam , Kanzhe Jiang , Gregor Mathias Maier , Srinivasan Ramasubramanian , Sudeep Dilip Modi , Robert W. Sherwood , Mandeep Singh Dhami , Michael Cohen
IPC分类号： H04L12/851 , H04L12/24 , H04L12/713 , H04L12/931 , H04L12/715
CPC分类号： H04L41/0893 , H04L45/586 , H04L45/64 , H04L47/2408 , H04L49/70
摘要： A controller implemented on computing equipment may be used to control switches in a network. End hosts and service devices may be coupled to the switches in the network. The controller may generate a virtual network topology of virtual switches and virtual routers. The controller may control the virtual routers and/or virtual switches to perform service insertion. The controller may perform service insertion by controlling the virtual routers and/or virtual switches to redirect network traffic through one or more selected service devices. The controller may determine which network traffic is to be redirected to which service devices based on a service insertion policy that identifies network traffic and services to be performed on the network traffic.
摘要翻译：在计算设备上实现的控制器可用于控制网络中的交换机。终端主机和服务设备可以耦合到网络中的交换机。控制器可以生成虚拟交换机和虚拟路由器的虚拟网络拓扑。控制器可以控制虚拟路由器和/或虚拟交换机来执行服务插入。控制器可以通过控制虚拟路由器和/或虚拟交换机来通过一个或多个所选择的服务设备重定向网络流量来执行服务插入。控制器可以基于标识要对网络业务执行的网络流量和服务的服务插入策略来确定将哪个网络流量重定向到哪个服务设备。

8. 发明申请

US20150188770A1 SYSTEMS AND METHODS FOR PERFORMING NETWORK SERVICE INSERTION 有权
标题翻译：用于执行网络服务插入的系统和方法
公开(公告)号：US20150188770A1
公开(公告)日：2015-07-02
申请号：US14142283
申请日：2013-12-27
申请人： Big Switch Networks, Inc.
发明人： Sumit Arun Naiksatam , Kanzhe Jiang , Gregor Mathias Maier , Srinivasan Ramasubramanian , Sudeep Dilip Modi , Robert W. Sherwood , Mandeep Singh Dhami , Michael Cohen
IPC分类号： H04L12/24 , H04L12/851
CPC分类号： H04L41/0893 , H04L45/586 , H04L45/64 , H04L47/2408 , H04L49/70
摘要： A controller implemented on computing equipment may be used to control switches in a network. End hosts and service devices may be coupled to the switches in the network. The controller may generate a virtual network topology of virtual switches and virtual routers. The controller may control the virtual routers and/or virtual switches to perform service insertion. The controller may perform service insertion by controlling the virtual routers and/or virtual switches to redirect network traffic through one or more selected service devices. The controller may determine which network traffic is to be redirected to which service devices based on a service insertion policy that identifies network traffic and services to be performed on the network traffic.
摘要翻译：在计算设备上实现的控制器可用于控制网络中的交换机。终端主机和服务设备可以耦合到网络中的交换机。控制器可以生成虚拟交换机和虚拟路由器的虚拟网络拓扑。控制器可以控制虚拟路由器和/或虚拟交换机来执行服务插入。控制器可以通过控制虚拟路由器和/或虚拟交换机来通过一个或多个所选择的服务设备重定向网络流量来执行服务插入。控制器可以基于标识要对网络业务执行的网络流量和服务的服务插入策略来确定将哪个网络流量重定向到哪个服务设备。

9. 发明申请

US20190141099A1 SYSTEMS AND METHODS TO MANAGE MULTICAST TRAFFIC 审中-公开
公开(公告)号：US20190141099A1
公开(公告)日：2019-05-09
申请号：US16235170
申请日：2018-12-28
申请人： Big Switch Networks, Inc.
发明人： Mary Preeti Manohar , Rajneesh Bajpai , Ning Song , Srinivasan Ramasubramanian , Shunjia Yu , Richard Lane , Kiran Gandhi Poola , Kenneth H. Chiang , Robert W. Sherwood
IPC分类号： H04L29/06 , H04L12/755 , H04L12/46 , H04L12/761 , H04L12/44 , H04L12/18
摘要： In various example embodiments, a system, a method, and a machine readable medium to manage multicast traffic are disclosed. The system includes a controller server for receiving first multicast group member information and for providing centralized control of a network. The first multicast group member information is received from a first end-host computer and received at the controller server responsive to a first packet forwarding system identifying the first end-host computer is joining a first multicast group on a first virtual network. The controller server generates a first multicast tree and communicates a first network configuration message to at least one packet forwarding system of the first plurality of packet forwarding systems. The first network configuration message includes a packet flow table entry enabling configuration of a flow table to enable communication of multicast traffic for the first multicast group over a portion of the first multicast tree.

10. 发明授权

US10270645B2 Systems and methods for handling link aggregation failover with a controller 有权
公开(公告)号：US10270645B2
公开(公告)日：2019-04-23
申请号：US14337161
申请日：2014-07-21
申请人： Big Switch Networks, Inc.
发明人： Srinivasan Ramasubramanian , Vishnu Emmadi , Sudeep Dilip Modi , Kanzhe Jiang , Kuang-Ching Wang , Gregor Mathias Maier , Mei Yang , Robert W. Sherwood , Mandeep Singh Dhami
IPC分类号： H04L12/24 , H04L12/713
摘要： A network of switches having ports coupled to other switches or end hosts may be controlled by a controller. The controller may identify whether any switch ports have failed. In response to identifying that a port has failed at a first switch, the controller may modify link aggregation group mappings of the other switches to handle failover. The controller may modify the link aggregation group mapping of each other switch to include a first mapping that includes ports coupled to the first switch and a second mapping that does not include any ports coupled to the first switch. The controller may configure forwarding tables at the switches to forward network packets using the first or second mappings based on network topology information maintained by the controller.

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