Patents by Inventor Shudong Zhou

Shudong Zhou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190116111
    Abstract: A packet forwarding network may include switches that forward network packets between end hosts. A monitoring network may be coupled to the forwarding network. A controller may control switches in the monitoring network to forward network packets tapped from the forwarding network to one or more packet recorders. The packet recorders may store the tapped packets and the controller may query the stored packets at a later time. The controller may analyze queried packets to monitor the operation of the packet forwarding network and, if desired, to display graphical visualizations associated with the packet forwarding network. If desired, the controller may instruct the packet recorders to replay the tapped packets to network visibility tools through the monitoring network. The controller may coordinate storage and query operations across multiple packet recorders using the monitoring network so that the packet storage capacity and recording rate may be scaled up over time.
    Type: Application
    Filed: October 12, 2017
    Publication date: April 18, 2019
    Inventors: Ryan Izard, Robert Ling, Shudong Zhou, Sandip Shah
  • Publication number: 20180375727
    Abstract: Systems and methods for building a monitoring fabric are described. The system receives a duplicate of a first portion of traffic information from a first network as first traffic information and communicates the first traffic information in the monitoring fabric. The first traffic information is communicated to a controller that configures the monitoring fabric. The system receives a duplicate of a second portion of the traffic information from the first network as second traffic information. The system forwards the second traffic information to at least one tool.
    Type: Application
    Filed: September 4, 2018
    Publication date: December 27, 2018
    Inventors: Ryan Izard, Christian Geddings Barrineau, Sandip Shah, Shudong Zhou, Andrew Shaw
  • Patent number: 10142160
    Abstract: A controller may fulfill hardware address requests that are sent by source end hosts in a network to discover hardware addresses of destination end hosts. The controller may use network topology information to determine how to process the hardware address requests. The controller may retrieve a requested hardware address from a database of end hosts. If the controller is able to retrieve the hardware address of a destination end host from the database of end hosts, the controller may provide the source end host with a reply packet that contains the requested hardware address. If the controller is unable to retrieve the requested hardware address, the controller may form request packets to discover the address of the second end host and/or to discover a packet forwarding path between the source end host and the destination end host.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: November 27, 2018
    Assignee: Big Switch Networks, Inc.
    Inventors: Robert Edward Adams, Daniel E. Talayco, Mandeep Singh Dhami, Shudong Zhou, Kanzhe Jiang, Guido Appenzeller
  • Patent number: 10097413
    Abstract: Systems and methods for building a hyper-scale monitoring fabric are described. The system receives a duplicate of a first portion of traffic information from a production network as first traffic information and communicates the first traffic information in the hyper-scale monitoring fabric. The first traffic information is communicated to a controller computer that configures the hyper-scale monitoring fabric. The system receives a duplicate of a second portion of the traffic information from the production network as second traffic information. The system forwards the second traffic information to a tool farm.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 9, 2018
    Assignee: Big Switch Networks, Inc.
    Inventors: Shudong Zhou, Sandip Shah, Andrew Shaw
  • Publication number: 20180167339
    Abstract: A runtime state of a virtual port associated with a virtual machine (“VM”) is persisted as the VM is migrated from a source host to a destination host. In certain embodiments, a virtual switch forwards network frames between the VM and the physical network interface via the virtual port. During migration of the VM, the runtime state of the virtual port is transferred to the destination host and applied at the second host to a virtual port associated with a second virtual switch at the destination host. The runtime state of the virtual port at the source host is then cleared, and the second virtual switch at the destination host forwards network frames between the migrated VM and the physical network interface of the destination host using the virtual port at the second host.
    Type: Application
    Filed: November 20, 2017
    Publication date: June 14, 2018
    Applicant: VMware, Inc.
    Inventors: Andrew W. LAMBETH, Shudong ZHOU
  • Patent number: 9838339
    Abstract: A runtime state of a virtual port associated with a virtual machine (“VM”) is persisted as the VM is migrated from a source host to a destination host. In certain embodiments, a virtual switch forwards network frames between the VM and the physical network interface via the virtual port. During migration of the VM, the runtime state of the virtual port is transferred to the destination host and applied at the second host to a virtual port associated with a second virtual switch at the destination host. The runtime state of the virtual port at the source host is then cleared, and the second virtual switch at the destination host forwards network frames between the migrated VM and the physical network interface of the destination host using the virtual port at the second host.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: December 5, 2017
    Assignee: VMware, Inc.
    Inventors: Andrew W. Lambeth, Shudong Zhou
  • Patent number: 9819551
    Abstract: 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.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: November 14, 2017
    Assignee: Big Switch Networks, Inc.
    Inventors: R. Kyle Forster, Shudong Zhou, Robert W. Sherwood, Jason Parraga
  • Patent number: 9654380
    Abstract: A controller may control client switches in a network including client and non-client switches. The controller may maintain a link discovery table including entries that identify links between client switches. The controller may classify the links as direct or broadcast links. To classify links of the link discovery cable, the controller may direct client switches to send broadcast and directed discovery packets from switch ports. Client switches that receive the discovery packets from other client switches may forward the discovery packets to the controller. The controller may use the discovery packets to classify the links of the link discovery table. The controller may classify ports as broadcast or regular ports based on the classified links. Non-client broadcast domains of the network topology may be identified from the broadcast ports using the broadcast and direct links of the link discovery table.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: May 16, 2017
    Assignee: Big Switch Networks, Inc.
    Inventors: Srinivasan Ramasubramanian, Shudong Zhou, Daniel C. Hersey, Guido Appenzeller, Mandeep Singh Dhami
  • Publication number: 20160285685
    Abstract: Systems and methods for building a hyper-scale monitoring fabric are described. The system receives a duplicate of a first portion of traffic information from a production network as first traffic information and communicates the first traffic information in the hyper-scale monitoring fabric. The first traffic information is communicated to a controller computer that configures the hyper-scale monitoring fabric. The system receives a duplicate of a second portion of the traffic information from the production network as second traffic information. The system forwards the second traffic information to a tool farm.
    Type: Application
    Filed: March 25, 2016
    Publication date: September 29, 2016
    Inventors: Shudong Zhou, Sandip Shah, Andrew Shaw
  • Patent number: 9413614
    Abstract: A controller may control client switches in a network including client and non-client switches. The controller may maintain a link discovery table including entries that identify links between client switches. The controller may classify the links as direct or broadcast links. To classify links of the link discovery table, the controller may direct client switches to send broadcast and directed discovery packets from switch ports. Client switches that receive the discovery packets from other client switches may forward the discovery packets to the controller. The controller may use the discovery packets to classify the links of the link discovery table. The controller may classify ports as broadcast or regular ports based on the classified links. Non-client broadcast domains of the network topology may be identified from the broadcast ports using the broadcast and direct links of the link discovery table.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 9, 2016
    Assignee: Big Switch Networks, Inc.
    Inventors: Srinivasan Ramasubramanian, Shudong Zhou, Daniel C. Hersey, Guido Appenzeller, Mandeep Singh Dhami
  • Patent number: 9374285
    Abstract: A controller may control client switches in a network including client and non-client switches. The controller may maintain a link discovery table including entries that identify links between client switches. The controller may classify the links as direct or broadcast links. To classify links of the link discovery table, the controller may direct client switches to send broadcast and directed discovery packets from switch ports. Client switches that receive the discovery packets from other client switches may forward the discovery packets to the controller. The controller may use the discovery packets to classify the links of the link discovery table. The controller may classify ports as broadcast or regular ports based on the classified links. Non-client broadcast domains of the network topology may be identified from the broadcast ports using the broadcast and direct links of the link discovery table.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: June 21, 2016
    Assignee: Big Switch Networks, Inc.
    Inventors: Srinivasan Ramasubramanian, Shudong Zhou, Daniel C. Hersey, Guido Appenzeller, Mandeep Singh Dhami
  • Publication number: 20160028658
    Abstract: A runtime state of a virtual port associated with a virtual machine (“VM”) is persisted as the VM is migrated from a source host to a destination host. In certain embodiments, a virtual switch forwards network frames between the VM and the physical network interface via the virtual port. During migration of the VM, the runtime state of the virtual port is transferred to the destination host and applied at the second host to a virtual port associated with a second virtual switch at the destination host. The runtime state of the virtual port at the source host is then cleared, and the second virtual switch at the destination host forwards network frames between the migrated VM and the physical network interface of the destination host using the virtual port at the second host.
    Type: Application
    Filed: October 6, 2015
    Publication date: January 28, 2016
    Applicant: VMWARE, INC.
    Inventors: Andrew W. LAMBETH, Shudong ZHOU
  • Patent number: 9160612
    Abstract: A method creates a distributed virtual switch (DVswitch) and distributed virtual ports (DVports) for the DVswitch. The DVswitch binds virtual switches in a collection of hosts together in a software abstraction. Also, the DVports are available for connection by virtual network interface cards (VNICs) of virtual machines in the collection of hosts. A request is received for a connection of a virtual network interface card (VNIC) of a virtual machine for a host in the collection of hosts to a DVport. If the requested DVport is available, the method provides connection information for the requested DVport to the host to allow the host to connect the requested DVport to the VNIC. The DVport stores a runtime state for a virtual port associated with a virtual switch for the host and the virtual switch forwards network frames between the VNIC and a physical network interface card (NIC).
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: October 13, 2015
    Assignee: VMware, Inc.
    Inventors: Andrew Lambeth, Shudong Zhou
  • Patent number: 9110728
    Abstract: Embodiments monitor application performance metrics representing the performance of a software application executed by one or more host computing devices. Based on the application of rules to the application performance metrics, an elasticity action, such as a power-on action, a power-off action, a deploy action, and/or a destroy action, is determined. The elasticity action is transmitted to one or more target hosts, which perform the elasticity action. The target host may be selected based on host performance metrics. Further, a load balancing service may accommodate the addition of a new software application instance to a cluster and/or the removal of an existing software application instance from the cluster.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: August 18, 2015
    Assignee: VMware, Inc.
    Inventors: Jianjun Shen, Ying He, Hailing Xu, Howie Xu, Juntao Liu, Shudong Zhou
  • Publication number: 20150138993
    Abstract: 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.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 21, 2015
    Applicant: Big Switch Networks, Inc.
    Inventors: R. Kyle Forster, Shudong Zhou, Robert W. Sherwood, Jason Parraga
  • Patent number: 9037719
    Abstract: A method and an apparatus of hypervisor level distributed load-balancing are disclosed. In one aspect, a method includes determining a location to direct a packet. The method also includes distributing the packet to process the packet through a processor. The method also includes assigning the packet to a guest such that a distribution of the packet to the guest is based on an algorithm. The method further includes altering a first destination address of the packet to a second destination address. The second destination address may be based on a virtual network interface of the guest. The method further includes convincing the guest the packet is from a virtual switch based on the second destination address. In addition, the method includes adjusting the distribution of the packet to the guest. The method also includes reducing a load of the guest through the adjustment.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: May 19, 2015
    Assignee: VMware, Inc.
    Inventors: Jianjun Shen, Zhi Feng Xia, Mojiong Qiu, Shudong Zhou, Donghai Han
  • Patent number: 8856384
    Abstract: A controller may help reduce network traffic that is associated with broadcasting of Dynamic Host Configuration Protocol (DHCP) packets by converting broadcast DHCP packets into unicast DHCP packets and forwarding the unicast DHCP packets to appropriate DHCP servers. The servers may be identified from a database of servers that is updated with DHCP server address information based on DHCP reply packets that are received by the controller from servers in the network. To convert DHCP request packets into unicast packets, the controller may modify address header fields of the packets such as Ethernet addresses and Internet Protocol (IP) addresses. The controller may forward the modified DHCP request packets to the server by providing packet forwarding rules such as flow table entries to the switches or by forwarding the modified DHCP request packets through the controller.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: October 7, 2014
    Assignee: Big Switch Networks, Inc.
    Inventors: Kanzhe Jiang, Shudong Zhou, Robert Edward Adams, Mandeep Singh Dhami, Alexander Stafford David Reimers
  • Patent number: 8693344
    Abstract: Network policies that control the flow of traffic through a network may be implemented using a controller server that controls a network of switches. Based on network packet attributes, the controller server may identify network policies that are associated with the network traffic. The controller server may identify dependencies between the network policies based on priorities that are associated with the network policies and overlap between the network policies. The controller server may provide the switches with packet forwarding rules based on the identified dependencies between the network policies, network switch attributes, and network switch capabilities. The packet forwarding rules may implement network policies for current network traffic and future network traffic.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 8, 2014
    Assignee: Big Switch Network, Inc.
    Inventors: Robert Edward Adams, Mandeep Singh Dhami, Robert W. Sherwood, Daniel E. Talayco, Shudong Zhou
  • Publication number: 20130198319
    Abstract: Embodiments monitor application performance metrics representing the performance of a software application executed by one or more host computing devices. Based on the application of rules to the application performance metrics, an elasticity action, such as a power-on action, a power-off action, a deploy action, and/or a destroy action, is determined. The elasticity action is transmitted to one or more target hosts, which perform the elasticity action. The target host may be selected based on host performance metrics. Further, a load balancing service may accommodate the addition of a new software application instance to a cluster and/or the removal of an existing software application instance from the cluster.
    Type: Application
    Filed: January 31, 2012
    Publication date: August 1, 2013
    Applicant: VMWARE, INC.
    Inventors: Jianjun SHEN, Ying HE, Hailing XU, Howie XU, Juntao LIU, Shudong ZHOU
  • Patent number: 8429647
    Abstract: Methods, systems and computer programs for migrating a virtual machine (VM) executing on a first host to a second host are presented, where the first host and the second are on different networks. One embodiment of a method includes assigning to the VM a VM address (VMA) belonging to a VM network and publishing a first route to an associated network (AN) via a first virtual router executing on the first host. The method further includes migrating the VM from the first host to the second host, the VM maintaining the assigned VMA after migrating, and publishing a second route to the AN via a second virtual router executing on the second host. The first and second virtual routers have addresses belonging to the VM network, and network packets to and from the VM flow through the virtual router where the VM is executing. A temporary tunnel between the virtual routers allows traffic to flow to the VM while the new route to AN is propagated throughout the network.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: April 23, 2013
    Assignee: VMware, Inc.
    Inventors: Shudong Zhou, Andrew Lambeth, Mark Pariente