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1. 发明申请

US20160021032A1 SYSTEMS AND METHODS FOR PERFORMING LOGICAL NETWORK FORWARDING USING A CONTROLLER 审中-公开
标题翻译：使用控制器执行逻辑网络转发的系统和方法
公开(公告)号：US20160021032A1
公开(公告)日：2016-01-21
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： H04L12/931 , H04L12/947
CPC分类号： H04L49/70 , H04L45/42 , H04L45/586
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.
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。终端主机可以耦合到交换机。控制器可以生成分布在网络中的底层交换机上的虚拟交换机，虚拟路由器和虚拟系统路由器的虚拟网络拓扑。控制器可以从相应的终端主机组，来自虚拟交换机组的虚拟交换机组成虚拟交换机，所述虚拟交换机包括耦合到虚拟交换机的虚拟接口，以及来自虚拟路由器组的虚拟系统路由器，所述虚拟路由器包括耦合的虚拟系统路由器接口到虚拟路由器。控制器可以基于为每个虚拟路由器，虚拟系统路由器和虚拟交换机的所识别的网络策略生成相应的流表条目来控制虚拟网络拓扑。控制器可以控制虚拟系统路由器在虚拟路由器之间路由数据包。

2. 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.

3. 发明申请

US20160020939A1 SYSTEMS AND METHODS FOR HANDLING LINK AGGREGATION FAILOVER WITH A CONTROLLER 审中-公开
标题翻译：用控制器处理链路聚合失败的系统和方法
公开(公告)号：US20160020939A1
公开(公告)日：2016-01-21
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
CPC分类号： H04L41/0654 , H04L41/0659 , H04L41/0681 , H04L41/12 , H04L45/586
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.
摘要翻译：具有耦合到其他交换机或终端主机的端口的交换机网络可以由控制器来控制。控制器可以识别是否有任何交换机端口出现故障。为了响应于在第一交换机上识别端口故障，控制器可以修改其他交换机的链路聚合组映射以处理故障转移。控制器可以修改每个其他交换机的链路聚合组映射以包括包括耦合到第一交换机的端口的第一映射和不包括耦合到第一交换机的任何端口的第二映射。控制器可以在交换机上配置转发表，以基于由控制器维护的网络拓扑信息，使用第一或第二映射转发网络分组。

4. 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.

5. 发明授权

US09356838B1 Systems and methods for determining network forwarding paths with a controller 有权
标题翻译：用控制器确定网络转发路径的系统和方法
公开(公告)号：US09356838B1
公开(公告)日：2016-05-31
申请号：US13843138
申请日：2013-03-15
申请人： Big Switch Networks, Inc.
发明人： Kuang-Ching Wang , Srinivasan Ramasubramanian
IPC分类号： H04L12/28 , H04L12/24
CPC分类号： H04L41/12
摘要： A controller may control switches in a network that forwards network packets between end hosts. The controller may generate a directed acyclic graph based on maintained network topology information. The directed acyclic graph may include multiple network paths between any given pair of switches. For a given network packet received from an end host, the controller may generate an identifier or otherwise classify the network packet based on network attributes of the network packet. The network attributes may include packet header information retrieved from the network packet, information maintained by the controller such as which virtual switch is associated with the network packet, and/or other network attributes. The controller may use the network packet identifier to select a network forwarding path for the network packet from the directed acyclic graph.
摘要翻译：控制器可以控制在终端主机之间转发网络分组的网络中的交换机。控制器可以基于维护的网络拓扑信息生成有向非循环图。有向非循环图可以包括任何给定的一对开关之间的多个网络路径。对于从终端主机接收到的给定网络分组，控制器可以基于网络分组的网络属性生成标识符或以其他方式对网络分组进行分类。网络属性可以包括从网络分组检索的分组报头信息，由控制器维护的信息，例如哪个虚拟交换机与网络分组相关联，和/或其他网络属性。控制器可以使用网络分组标识符从有向无环图中选择网络分组的网络转发路径。

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