公开(公告)号：US10243848B2

公开(公告)日：2019-03-26

申请号：US14838122

申请日：2015-08-27

Applicant: Nicira, Inc.

Inventor： Vivek Agarwal ,  Ganesan Chandrashekhar ,  Abhishek Goliya ,  Akshay Katrekar

IPC: H04L12/24 ,  H04L29/08 ,  H04L12/721 ,  H04L12/773 ,  H04L12/933 ,  H04L12/947 ,  H04L12/713 ,  G06F9/455 ,  H04L12/931

Abstract: A system provisions global logical entities that facilitate the operation of logical networks that span two or more datacenters. These global logical entities include global logical switches that provide L2 switching as well as global routers that provide L3 routing among network nodes in multiple datacenters. The global logical entities operate along side local logical entities that are for operating logical networks that are local within a datacenter.

公开(公告)号：US20190068493A1

公开(公告)日：2019-02-28

申请号：US15686098

申请日：2017-08-24

Applicant: Nicira, Inc.

Inventor： Shashank Ram ,  Sairam Venugopal ,  Yin Lin ,  Anand Kumar ,  Nithin Bangalore Raju ,  Mukesh Hira ,  Ganesan Chandrashekhar ,  Vivek Agarwal

IPC: H04L12/713 ,  H04L12/707 ,  H04L12/46 ,  G06F9/50

Abstract: A data compute node executes (i) a set of tenant applications connected to a third party overlay network, (ii) a set of network manager applications, and (iii) a managed forwarding element that includes a pair of overlay and underlay network virtual adapters. A packet that is received from a network manager application and addressed to an underlay network destination is sent to the underlay network destination address through a physical NIC of the host without network address translation or encapsulation. A packet that is received from a tenant application and addressed to an underlay network destination is subject to SNAT and is sent to the underlay network destination address. A packet that is received from a tenant application and is addressed an overlay destination address is encapsulated with the header of the overlay network and is sent to the overlay network destination address through the underlay virtual adapter.

公开(公告)号：US10218523B2

公开(公告)日：2019-02-26

申请号：US15652203

申请日：2017-07-17

Applicant: Nicira, Inc.

Inventor： Sami Boutros ,  Alexander Tessmer ,  Subin Cyriac Mathew ,  Ganesan Chandrashekhar ,  Vivek Agarwal

IPC: H04L12/28 ,  H04L12/18 ,  H04L12/24 ,  H04L12/721 ,  H04L12/46

Abstract: For a managed network implementing at least one logical router having centralized and distributed components, some embodiments provide a method for configuring a managed forwarding element (MFE) executing on a first host machine to implement a distributed multicast logical router and multiple logical switches logically connected to the logical router in conjunction with a set of additional MFEs executing on additional host machines to process multicast data messages. The method receives a multicast group report from a data compute node (DCN) that executes on the first host, sends a summarized multicast group report indicating multicast groups joined by DCNs executing on the first host to a set of central controllers, receives data based on an aggregated multicast group report from the set of central controllers, and uses the data based on the aggregated multicast group report to configure the MFE to implement the distributed multicast logical router.

公开(公告)号：US09893988B2

公开(公告)日：2018-02-13

申请号：US14227964

申请日：2014-03-27

Applicant: Nicira, Inc.

Inventor： Vivek Agarwal ,  Ganesan Chandrashekhar ,  Rahul Korivi Subramaniyam ,  Ram Dular Singh ,  Howard Wang

IPC: H04L12/713 ,  H04L12/749 ,  H04L29/12 ,  H04L12/931

CPC classification number: H04L45/586 ,  H04L45/741 ,  H04L49/70 ,  H04L61/2596

Abstract: A logical routing element (LRE) having multiple designated instances for routing packets from physical hosts (PH) to a logical network is provided. A PH in a network segment with multiple designated instances can choose among the multiple designated instances for sending network traffic to other network nodes in the logical network according to a load balancing algorithm. Each logical interface (LIF) of an LRE is defined to be addressable by multiple identifiers or addresses, and each LIF identifier or address is assigned to a different designated instance.

公开(公告)号：US09575782B2

公开(公告)日：2017-02-21

申请号：US14137867

申请日：2013-12-20

Applicant: Nicira, Inc.

Inventor： Ganesan Chandrashekhar ,  Rahul Korivi Subramaniyam ,  Ram Dular Singh ,  Vivek Agarwal ,  Howard Wang

IPC: H04L12/721 ,  G06F9/455 ,  H04L12/56 ,  H04L29/12

CPC classification number: G06F9/455 ,  G06F9/45558 ,  G06F2009/45595 ,  H04L45/44 ,  H04L45/741 ,  H04L61/103

Abstract: Some embodiments provide a method for a computing device serving as a host machine in a logical network. The method executes several virtual machines that are in several different segments of the logical network. The method operates a managed physical routing element (MPRE) for routing data packets between different segments of the logical network. The MPRE includes several logical interfaces, each of which is for receiving data packets from a different segment of the logical network. Each of the logical interfaces is addressable by a network layer address. The method intercepts an Address Resolution Protocol (ARP) broadcast message when the destination address matches the network address of one of the logical interfaces. The method formulates an ARP reply to the ARP broadcast message.

Abstract translation: 一些实施例提供了用作逻辑网络中的主机的计算设备的方法。 该方法执行在逻辑网络的几个不同段中的几个虚拟机。 该方法操作用于在逻辑网络的不同段之间路由数据分组的受管理物理路由元件（MPRE）。 MPRE包括几个逻辑接口，每个逻辑接口用于从逻辑网络的不同段接收数据包。 每个逻辑接口可由网络层地址寻址。 当目的地址与其中一个逻辑接口的网络地址匹配时，该方法会拦截地址解析协议（ARP）广播消息。 该方法对ARP广播消息进行ARP回复。

公开(公告)号：US20160380891A1

公开(公告)日：2016-12-29

申请号：US14838004

申请日：2015-08-27

Applicant: Nicira, Inc.

Inventor： Vivek Agarwal ,  Ganesan Chandrashekhar ,  Abhishek Goliya ,  Akshay Katrekar

IPC: H04L12/721 ,  H04L12/947 ,  H04L12/773 ,  H04L12/933

CPC classification number: H04L45/66 ,  G06F9/45558 ,  G06F2009/45595 ,  H04L41/0806 ,  H04L45/586 ,  H04L45/60 ,  H04L49/15 ,  H04L49/25 ,  H04L49/35 ,  H04L49/70 ,  H04L69/324 ,  H04L69/325

Abstract: A system provisions global logical entities that facilitate the operation of logical networks that span two or more datacenters. These global logical entities include global logical switches that provide L2 switching as well as global routers that provide L3 routing among network nodes in multiple datacenters. The global logical entities operate along side local logical entities that are for operating logical networks that are local within a datacenter.

Abstract translation: 系统规定了促进跨越两个或更多数据中心的逻辑网络运行的全球逻辑实体。 这些全局逻辑实体包括提供L2交换的全球逻辑交换机以及在多个数据中心的网络节点之间提供L3路由的全局路由器。 全局逻辑实体沿着本地逻辑实体操作，用于操作数据中心内本地的逻辑网络。

公开(公告)号：US09413644B2

公开(公告)日：2016-08-09

申请号：US14227959

申请日：2014-03-27

Applicant: Nicira, Inc.

Inventor： Vivek Agarwal ,  Ganesan Chandrashekhar ,  Rahul Korivi Subramaniyam ,  Ram Dular Singh ,  Howard Wang

IPC: H04L1/00 ,  H04L12/721 ,  H04L12/24 ,  H04L29/12 ,  H04L12/713 ,  H04L12/707 ,  H04L12/803 ,  G06F9/455

CPC classification number: H04L45/44 ,  G06F9/455 ,  G06F9/45558 ,  G06F2009/45595 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/24 ,  H04L45/586 ,  H04L45/64 ,  H04L47/125 ,  H04L61/103 ,  H04L61/2007 ,  H04L61/2061

Abstract: A logical routing element (LRE) having multiple designated instances for routing packets from physical hosts (PH) to a logical network is provided. A PH in a network segment with multiple designated instances can choose among the multiple designated instances for sending network traffic to other network nodes in the logical network according to a load balancing algorithm. Each logical interface (LIF) of an LRE is defined to be addressable by multiple identifiers or addresses, and each LIF identifier or address is assigned to a different designated instance.

Abstract translation: 提供了具有用于将来自物理主机（PH）到逻辑网络的分组路由的多个指定实例的逻辑路由选择元素（LRE）。 具有多个指定实例的网段中的PH可以根据负载平衡算法在多个指定实例中选择，以将网络流量发送到逻辑网络中的其他网络节点。 LRE的每个逻辑接口（LIF）被定义为可由多个标识符或地址寻址，并且每个LIF标识符或地址被分配给不同的指定实例。

公开(公告)号：US20160094364A1

公开(公告)日：2016-03-31

申请号：US14503164

申请日：2014-09-30

Applicant: Nicira, Inc.

Inventor： Rahul Korivi Subramaniyam ,  Howard Wang ,  Ganesan Chandrashekhar ,  Vivek Agarwal ,  Ram Dular Singh

IPC: H04L12/46

CPC classification number: H04L12/4625 ,  H04L12/462 ,  H04L12/4641

Abstract: Virtualization software that includes a VDRB (virtual distributed router/bridge) module for performing L3 routing and/or bridging operations is provided. At least some of the VDRBs are configured as VDBs (virtual distributed bridge) for performing bridging operations between different network segments in a distributed manner. The bridging tasks of a network are partitioned among several VDBs of the network based on MAC addresses. MAC addresses of VMs or other types of network nodes belonging to an overlay logical network are partitioned into several shards, each shard of MAC addresses assigned to a VDB in the network. Each VDB assigned a shard of MAC addresses performs bridging when it receives a packet bearing a MAC address belonging to its assigned shard. A VDB does not perform bridging on packets that do not have MAC address that falls within the VDB's shard of MAC addresses.

Abstract translation: 提供了包括用于执行L3路由和/或桥接操作的VDRB（虚拟分布式路由器/网桥）模块的虚拟化软件。 至少一些VDRB被配置为VDB（虚拟分布式网桥），用于以分布式方式在不同网段之间执行桥接操作。 基于MAC地址，网络的桥接任务在网络的几个VDB之间进行分区。 属于覆盖逻辑网络的虚拟机或其他类型的网络节点的MAC地址被划分成几个分片，每个碎片分配给网络中的VDB。 分配有MAC地址的每个VDB在接收到具有属于其分配的分片的MAC地址的分组时执行桥接。 VDB不对没有MAC地址的数据包进行桥接，该MAC地址落在VDB的MAC地址块内。

公开(公告)号：US11968078B2

公开(公告)日：2024-04-23

申请号：US15654195

申请日：2017-07-19

Applicant: Nicira, Inc.

Inventor： Alexander Tessmer ,  Ganesan Chandrashekhar ,  Vivek Agarwal ,  Subin Cyriac Mathew ,  Ankur Kumar Sharma

IPC: H04L41/0668 ,  H04L43/0811 ,  H04L45/64

CPC classification number: H04L41/0668 ,  H04L43/0811 ,  H04L45/64

Abstract: Exemplary methods, apparatuses, and systems maintain network membership information for a host when it is disconnected from a controller. When the host detects a loss of connectivity with the network controller, the host identifies and selects one or more hosts that are members of a control logical network. The control logical network includes hosts configured to run data compute nodes that are members of the overlay network, regardless of whether or not each of the hosts is currently running a data compute node that is a member of the overlay network. The host then sends any broadcast, unknown destination, or multicast (BUM) data packet(s) to the selected one or more hosts.

公开(公告)号：US20230396540A1

公开(公告)日：2023-12-07

申请号：US18235859

申请日：2023-08-20

Applicant: Nicira, Inc.

Inventor： Vivek Agarwal ,  Ganesan Chandrashekhar ,  Rahul Korivi Subramaniyam ,  Ram Dular Singh ,  Howard Wang

IPC: H04L45/586 ,  H04L45/741 ,  H04L45/64

CPC classification number: H04L45/586 ,  H04L45/741 ,  H04L45/64 ,  H04L61/2596

Abstract: A logical routing element (LRE) having multiple designated instances for routing packets from physical hosts (PH) to a logical network is provided. A PH in a network segment with multiple designated instances can choose among the multiple designated instances for sending network traffic to other network nodes in the logical network according to a load balancing algorithm. Each logical interface (LIF) of an LRE is defined to be addressable by multiple identifiers or addresses, and each LIF identifier or address is assigned to a different designated instance.