Standby Switch Patents (Class 370/219)
  • Patent number: 10447650
    Abstract: A method of dynamically updating DNS information in an IP network. A first entity of the IP network, distinct from DNS servers of the IP network, receives a request from a second entity of the network, likewise distinct from the DNS servers but possessing a copy of DNS information, constituting a record in at least one DNS server of the IP network. The first entity responds to the request by sending a message to the second entity, including an indication about the need to modify the copy. On receiving the message, the second entity determines whether the indication includes at least one additional instruction. If so, the second entity: performs a DNS interrogation, and on receiving a response, modifies its copy of the DNS information based the response and the additional instruction; or modifies its copy of the DNS information based on the additional instruction without performing a DNS interrogation.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 15, 2019
    Assignee: ORANGE
    Inventors: Jean-Claude Le Rouzic, Jose Doree
  • Patent number: 10411948
    Abstract: A method of determining the state of each peer node in a pair of first and second peer nodes is provided. The first node is configured as a confirmed active node and the second node is configured as a standby node. The second node transitions into a tentative active mode when a predetermined number of heartbeat messages are lost between the pair nodes while the first and second nodes remain functional. The second node receives a first message from the first node after the heartbeat messages are established between the peer nodes. The first message indicates that the first node is in the confirmed active mode. In response to the first message, the second node transitions from the tentative active mode into the standby mode and sends a second message from the second node to the first node indicating that the second node is in the standby mode.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: September 10, 2019
    Assignee: NICIRA, INC.
    Inventor: Haihua Luo
  • Patent number: 10404760
    Abstract: A method for providing network connectivity to at least one client device includes: connecting the at least one client device to an access gateway device to create a local area network of the access gateway device; and connecting the access gateway device to an internet protocol edge function. The at least one client device is connected to a telecommunications network via the access gateway device and the internet protocol edge function. In order to provide the network connectivity to the at least one client device, a network connectivity link is provided, the network connectivity link comprising: a local area network-segment between the at least one client device and the access gateway device, and a wide area network-segment between the access gateway device and the internet protocol edge function.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: September 3, 2019
    Assignee: DEUTSCHE TELEKOM AG
    Inventors: Hans-Joerg Kolbe, Thomas Haag
  • Patent number: 10389627
    Abstract: A method for forwarding a data flow of multiple data packets according to a protocol adapted for locally-managed data forwarding in a software-defined networking (SDN) architecture includes entering each data packet of the data flow of multiple data packets to a data communication forwarding entity (FE). At the forwarding entity, the next destination of the data packet is selected by applying state machine logic to at least one field of the data packet and to state information tracked by the forwarding entity before the data packet is received. The state machine logic includes rules for forwarding the data packet.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: August 20, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Hayim Porat
  • Patent number: 10382316
    Abstract: A device may determine that a route is inactive. Information identifying the route may be stored in a forwarding plane portion of a forwarding table and a control plane portion of the forwarding table. The route may be associated with directing network traffic toward an endpoint network device. The device may remove the information identifying the route from the forwarding plane portion of the forwarding table without removing the information identifying the route from the control plane portion of the forwarding table based on determining that the route is inactive. The device may route network traffic based on the forwarding table after removing the information identifying the route from the forwarding plane portion of the forwarding table without removing the information identifying the route from the control plane portion of the forwarding table.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: August 13, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Ali Ahmed Shakir, Sridhar Talari Rajagopal
  • Patent number: 10367680
    Abstract: Provided is a network relay apparatus of a gateway redundancy system, including: a storage unit configured to store, as an internal status, a redundancy status for indicating whether the network relay apparatus operates as an active system or a standby system for each subscriber terminal or subscriber terminal group, and a subscriber status for indicating a list of used address information for each subscriber terminal; and a management unit configured to: monitor communication between another network relay apparatus in a redundancy configuration and a subscriber terminal group; record, into the storage unit, used address information assigned by the another network relay apparatus to a subscriber terminal as a part of the subscriber status; and notify or advertise the sequentially recorded internal status to a notification destination sequentially at a predetermined timing.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: July 30, 2019
    Assignee: NEC CORPORATION
    Inventor: Tomoshige Funasaki
  • Patent number: 10367739
    Abstract: A method and a transmitting node for redirecting of a flow of data packets to a path of alternative paths, and a method and a receiving node for enabling redirection of a flow of data packets to a path of alternative paths, where data packets are marked with a value indicating the importance of the data packets. The method for directing directs one or more flows of data packets for the alternative paths, wherein data packets marked with a higher value are prioritized over data packets marked with a lower value. Based on feedback information, the transmitting node redirects a flow of data packets to a second path of the alternative paths, if the metric of congestion indicates a higher congestion on the first path than on the second path.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: July 30, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Szilveszter Nádas, János Harmatos, Sándor Rácz, Zoltán Richárd Turányi
  • Patent number: 10348611
    Abstract: In one embodiment, a method comprises creating, in a computing network, a loop-free routing topology comprising a plurality of routing arcs for reaching a destination device, each routing arc comprising a first network device as a first end of the routing arc, a second network device as a second end of the routing arc, and at least a third network device configured for routing any network traffic along the routing arc toward the destination device via any one of the first or second ends of the routing arc; and causing the network traffic to be forwarded along at least one of the routing arcs to the destination device.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: July 9, 2019
    Inventors: Pascal Thubert, Patrice Bellagamba, Dirk Anteunis, Eric Michel Levy-Abegnoli
  • Patent number: 10339077
    Abstract: Systems, methods, and apparatuses are disclosed herein for identifying a topology of a MoChi system prior to a boot-up of an operating system. A master SoC may detect, prior to boot-up of an operating system that uses the master SoC, an initialization command, and may, in response to detecting the initialization command, assign a first chip identifier to the master SoC. The master SoC may transmit a discovery communication from the master SoC to a slave SoC that is one hop away from the master SoC. The slave SoC may determine whether the slave SoC is a last hop SoC, and, in response to determining that the slave SoC is a last hop SoC, the slave SoC may transmit a reply communication to the master SoC. The master SoC may then assign, based on the reply communication, a second chip identifier to the slave SoC.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: July 2, 2019
    Assignee: Marvell World Trade Ltd.
    Inventor: Jerry Hongming Zheng
  • Patent number: 10326668
    Abstract: A method and system of portable and flexible deployment of dedicated and virtual servers. A user input of an order requesting the deployment of a dedicated or virtual server at a specified data center location is received at a user interface. A user input of a selection of a server image pertaining to the server to be deployed is received at a first screen at the user interface. A second screen is presented to the user at the user interface, which enables the user to select one or more geographic locations of two or more distinct geographic locations, from a menu displayed on the second screen, for storing and deploying the selected server image in a data center at each selected geographic location. The server is selected according to the user input of the selected server image. The selected server is deployed.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: June 18, 2019
    Assignee: SoftLayer Technologies, Inc.
    Inventors: Marc Jones, Duke Skarda
  • Patent number: 10314049
    Abstract: A system for providing small cell backhaul communication includes a small cell backhaul network including a plurality of small cell network nodes. A software defined network (SDN) controller controls link configuration between the plurality of small cell network nodes of the small cell backhaul network. The SDN controller communicates control channel information with the plurality of small cell network backhaul nodes over a control channel using a communications protocol that enables software defined networking.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 4, 2019
    Assignee: NxGen Partners IP, LLC
    Inventor: Solyman Ashrafi
  • Patent number: 10298538
    Abstract: In an example, a VTEP device may store first routing information acquired by the VTEP device, wherein the first routing information may be routing information of a host device connected with the VTEP device. The VTEP stores second routing information sent from other VTEP devices in a VXLAN, wherein the second routing information may be routing information of a host device connected with the other VTEP devices. The VTEP receives an address resolution request from a source host device, wherein the address resolution request comprises an IP address of a target host device, and a VXLAN identifier of a VXLAN to which the target host device belongs. and in response to a determination that routing information of the target host device may be stored locally, the VTEP sends an address resolution response comprising a MAC address of the target host device to the source host device.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: May 21, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Jun Yang, Xiaoqiang Tian, Hui Cao, Jun Zhao
  • Patent number: 10298490
    Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: May 21, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Liqin Dong, Yibin Yang, Lukas Krattiger, Xinggang Zhou, Di Jin, Siu-Man Leung
  • Patent number: 10257023
    Abstract: A storage controller comprising a first server and a second server is maintained. Data of the first server is stored in a first storage cloud, and data of the second server is stored in a second storage cloud. In response to a failure of the second server, the first server performs operations of the second server by using the stored data of the first server in the first storage cloud.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: April 9, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Matthew G. Borlick, Lokesh M. Gupta
  • Patent number: 10250322
    Abstract: A transmission system includes: a first transmission device that receives a first signal from the work path; a second transmission device, coupled to a protection path in a redundant configuration with respect to the work path, that receives a second signal from the protection path; and a first communication device coupled to the first and second transmission devices, wherein the first communication device, when detecting switching information from the first transmission device, notifies the first transmission device of first switching notification information and notifies the second transmission device of second switching notification information, the first transmission device stops relaying the first signal to the first communication device in response to the first switching notification information from the first communication device, and the second transmission device starts to relay the second signal to the first communication device in response to the second switching notification information from the f
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: April 2, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shingo Hironaka, Yuji Kamura
  • Patent number: 10250489
    Abstract: A stacked switch packet communication system is connected to a Multi-Chassis Link Aggregation Group (MLAG). Devices in the system include a designated device for receiving packets that are destined for the MLAG. A new MLAG device is enabled while continuing packet communication by identifying an address of a single port in the new MLAG device. In first updates of the devices the single port is established in the forwarding databases of the devices and the packets transmitted through the devices to the single port. Thereafter, in second updates the single port is replaced in the forwarding databases by another port of the new MLAG device. Upon completion of respective second updates, the packets are transmitted through the devices to the other port in the MLAG.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 2, 2019
    Assignee: MELLANOX TECHNOLOGIES TLV LTD.
    Inventors: Matty Kadosh, Gil Levy, Aviv Kfir
  • Patent number: 10237732
    Abstract: A method and device for authenticating a user of a communication device accessing an online service. The online service is accessible over a data network and is provided through a service platform. The communication device is connected to a mobile phone network and to the data network. The communication device includes an interface software application configured to interact with the service platform through the data network for fruition of the online service, and a messaging function configured to send messages through the mobile phone network. A user-side authentication application is provided at the communication device, a provider-side authentication application is provided at the service platform, and an authentication control function is provided in communication relationship with the provider-side authentication application and with the mobile phone network.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 19, 2019
    Assignee: TELECOM ITALIA S.p.A.
    Inventors: Alberto Ciarniello, Alessandro Simonetti
  • Patent number: 10225102
    Abstract: Traffic is transferred between a first consumer network node and a second consumer network node via a local connection established at a first service provider network node. The first service provider network node is connected to the first consumer network node via a first attachment circuit, and to the second network consumer node via a second attachment circuit. A loss in connectivity is detected between the first consumer network node and the second consumer network node via the local connection, and in response, traffic is transferred between the first consumer network node and the second consumer network node via a remote connection. The remote connection includes a pseudowire established between the first service provider network node and a second service provider network node. The second consumer network node is connected to the second service provider network node via a third attachment circuit.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: March 5, 2019
    Assignee: Metaswitch Networks Ltd
    Inventors: James Peter McAllister, Benjamin Thomas Wright, Jonathan Eric Hardwick
  • Patent number: 10182003
    Abstract: In one example, techniques of this disclosure may enable a point of local repair (PLR) network device to signal availability of link protection or node protection to a merge point (MP) network device and enable a network device to actively determine whether or not it is a merge point router. Based on whether or not the network device determines it is a MP, the network device may selectively clean up LSP states when there is an upstream link or node failure. The RSVP-TE protocol may be extended to enable a network device to send a tear down message to a downstream router, which may enable the downstream router to conditionally delete locale LSP state information. In some instances, a PLR network device may directly send a tear down message to a MP network device even though the PLR network device may not have a working bypass LSP.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: January 15, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Chandrasekar Ramachandran, Markus Jork, Yakov Rekhter, Harish Sitaraman
  • Patent number: 10178186
    Abstract: Communication resumption information can be retained nodes of a cluster of nodes that form a distributed computing system. The communication resumption information can be exchanged between a node of the cluster and a peer node of the cluster after resumption of communication following a loss of communication between the node and the peer node. A determination of whether communication between the node and the peer node can be reestablished without losing messages can include comparing the communication resumption information received by the node from the peer node with the communication resumption information retained at the node. Communication between the node and the peer node can be resumed based when the determining indicates that communication between the node and the peer node can be reestablished without losing messages.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 8, 2019
    Assignee: SAP SE
    Inventor: Ivan Schreter
  • Patent number: 10158533
    Abstract: A system and method for base topology selection includes a network controller including a control unit and one or more ports coupled to the control unit and configured to couple the network controller to one or more network switching devices of a network. The network controller is configured to receive initiation messages from the network switching devices, receive configuration and status messages from the network switching devices, transmit discovery requests to the network switching devices, receive discovery responses from the network switching devices, determine a network topology of the network based on information associated with the initiation messages, the configuration and status messages, and the discovery responses, apply heuristic rules to the network topology, and select a base topology based on results of the applied heuristic rules.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: December 18, 2018
    Assignee: Dell Products L.P.
    Inventors: Prakash Kashyap, Arun Sarat Yerra
  • Patent number: 10158559
    Abstract: A network controller comprising a processor configured to obtain topology information of a network, wherein the topology information indicates a plurality of non-software-defined networking (non-SDN) network elements (NEs) interconnected by a plurality of links in the network, analyze each non-SDN NE according to the topology information to determine whether the non-SDN NE is a candidate NE for establishing a backup tunnel to protect a single-link failure at one of the plurality of links, and select a plurality of target NEs from the candidate NEs to protect against all single link-failures in the network, and a transmitter coupled to the processor and configured to send a first message to a first of the target NEs to dynamically enable software-defined networking (SDN) functionalities at the first target NE in order to facilitate single-link failure protection in the network.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: December 18, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Min Luo, Cing-Yu Chu, Kang Xi, Hung-Hsiang Jonathan Chao
  • Patent number: 10148348
    Abstract: Electrical-optical interface devices and methods for use in optical communications systems are disclosed. The electrical-optical interface devices are configured to convert electrical signals to optical signals and optical signals to electrical signals, and are configured to connect to external devices. The electrical-optical interface device is configured to monitor the data transmission between external devices over a primary communication pathway. The electrical-optical interface device is designed to reconfigure itself when it receives information about a communication error so that it automatically utilizes secondary optical communication pathways as redundant optical communication pathways to maintain data communication between the external devices.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: December 4, 2018
    Assignee: Corning Optical Communications LLC
    Inventor: Michael John Yadlowsky
  • Patent number: 10148564
    Abstract: In general, techniques are described for identifying a result set of multiple paths through a network for one or more label switched paths between a source node and a destination node. In some examples, the identified paths are computed to be broadly separate to avoid overlapping network elements. A device that routes the label switched paths to the network may select from the result set of multiple paths to route each of the label switched paths. In response to detecting a failure of a network element along the routed path for a label switched path, the device may select a new path from the result set that includes already-identified paths.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: December 4, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: David C. Wood, Jonathan C. Barth
  • Patent number: 10148310
    Abstract: RF circuitry, which includes an antenna VSWR RF duplexer and duplexer control circuitry, is disclosed. The antenna VSWR RF duplexer includes a first hybrid RF coupler having a first main port coupled to an RF antenna, a first isolation port, and a first pair of quadrature ports; a second hybrid RF coupler having a second main port, a second isolation port, and a second pair of quadrature ports; a third hybrid RF coupler having a third main port, a third isolation port, and a third pair of quadrature ports; and RF filter circuitry coupled to the first pair of quadrature ports, the second pair of quadrature ports, and the third pair of quadrature ports, such that the antenna VSWR RF duplexer provides an antenna VSWR signal. The duplexer control circuitry receives and processes the antenna VSWR signal, which is representative of VSWR mismatch conditions at the first main port.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: December 4, 2018
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 10135670
    Abstract: In an example, a computer-readable medium may store executable instructions. The executable instructions may be to detect an inoperative network device in a communication network managed by a controller, determine a network switching function assigned to the inoperative network device, and provide the network switching function through the controller itself instead of the inoperative network device.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: November 20, 2018
    Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
    Inventor: Shaun Wackerly
  • Patent number: 10135725
    Abstract: A data packet forwarding solution, which relates to the field of network transmission. A virtual switch in the solution saves a flow entry as an aging flow entry deleted from a flow table in a switch, and receives a reporting data packet generated according to a forwarding data packet when the forwarding data packet fails to match each flow entry in the flow table in the switch and a secure channel between the switch and the controller is faulty, delivers an aging flow entry matching the reporting data packet from an aging flow table to the switch, where the aging flow table includes one or more flow entries that are deleted as aging flow entries from a flow table in the switch.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: November 20, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Kai Qi, Bailin Wen, Fengwei Zhang
  • Patent number: 10129183
    Abstract: A method for managing a connection apparatus and a connection apparatus are disclosed. In an embodiment the connection apparatus includes a first connector configured to be connected to a service processing unit, a second connector configured to be connected to a first switching unit, a third connector configured to be connected to a second switching unit, wherein the third connector is further configured to be disconnected from the second switching unit and connected to the first switching unit. The apparatus further comprises a first transmission medium, a second transmission medium, one end of the first transmission medium being directly connected to the first connector, one end of the second transmission medium being directly connected to the first connector, another end of the first transmission medium being directly connected to the second connector, and another end of the second transmission medium being directly connected to the third connector.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: November 13, 2018
    Assignee: Huawei Technologies Co., Ltd
    Inventors: Chongyang Wang, Zhigang Guo
  • Patent number: 10110465
    Abstract: A method of supporting N active, distributed HSRP gateways in a virtual Extensible local area network. The method includes: joining by HSRP active, HSRP standby, HSRP listen gateways a special virtual Extensible LAN tunnel endpoint address; advertising by HSRP active, HSRP standby, HSRP listen gateways its address; assigning priority to HSRP active, HSRP standby, HSRP listen gateways; determining the liveliness of the HSRP active gateway; and the HSRP active gateway sourcing Hello with HSRP VMAC in the inner layer 2 header, and the special virtual Extensible LAN tunnel endpoint address in the outer Layer 3 address; replying by the HSRP active gateway to a broadcast ARP to an HSRP Virtual IP address; forwarding packets destined to Virtual MAC by any of HSRP active, HSRP standby, HSRP listen gateways and replying by HSRP active, HSRP standby, HSRP listen gateways to a unicast ARP to an HSRP Virtual IP address.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: October 23, 2018
    Assignee: CISCO TECHNOLOGY, INC.
    Inventor: Nitish Gupta
  • Patent number: 10103932
    Abstract: A technique for assisting remote diagnosis of an access gateway by an administration apparatus. The gateway enables access to a wide area communication network via an access network. A failure affecting access to the wide area communications network gateway via the access network is detected. A device obtains an identifier of the access gateway and a datum assisting diagnosis of the failure by using a radio communication channel and sends the identifier and the datum obtained to the administration apparatus via an access means in an operational state.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: October 16, 2018
    Assignee: ORANGE
    Inventors: Fabrice Baranski, Fabrice Fontaine, Simon Gloanec
  • Patent number: 9992240
    Abstract: According to some embodiments, a method in a network node of a wireless communication network comprises determining that a plurality of S1-AP UE contexts maintained by the network node remain valid after a SCTP failure; generating an S1 Setup Request message comprising an indication that the UE contexts remain valid; and communicating the S1 Setup Request message to a MME. In particular embodiments, a method in an MME comprises receiving an S1 Setup Request message from a network node comprising an indication that UE contexts maintained by the network node remain valid after a SCTP failure. The MME determines a plurality of UE contexts maintained by the MME remain valid after a SCTP failure; generates an S1 Setup Response message comprising an indication that UE contexts maintained by the MME remain valid; and communicates the S1 Setup Response message to the network node.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: June 5, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Loudon Lee Campbell
  • Patent number: 9979633
    Abstract: A method is provided to control an IP core network, including first and second routers connected to an external data packet network and switches able to connect to a base station of a network for access to the first and second routers. The data packet network is able to send data streams through the IP core network destined for the terminals attached to the base station, at least one data stream currently being conveyed between the external network and at least one terminal. The method includes: establishing a rule for processing a stream by the first router, assigning the second router as backup router for the first router; transmitting to the external data packet network information relating to the assigning of the backup router; detecting an event relating to a failure of the first router; and transmitting to the backup router an established processing rule to be applied.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: May 22, 2018
    Assignee: ORANGE
    Inventors: Sivasothy Shanmugalingam, Philippe Bertin
  • Patent number: 9954694
    Abstract: In one example, a method includes configuring a first provider edge (PE) router of a Provider Backbone Bridging (PBB) Ethernet Virtual Private Network (EVPN) to join an Ethernet Segment in active-active mode with at least a second PE router that is operating as a designated forwarder for the Ethernet Segment; receiving, by the first PE router from a remote PE router and prior to the first PE router performing Media Access Control (MAC) learning of a customer-MAC (C-MAC) address that is reachable via a backbone-MAC (B-MAC) address associated with the Ethernet Segment, a network packet that includes the C-MAC address; and in response to determining that the C-MAC address has not been learned by the first PE router and the B-MAC address included in the network packet is associated with the Ethernet Segment, forwarding, by the first PE router, the network packet to a destination identified by the C-MAC address.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: April 24, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Tapraj Singh, Arijit Paul, Sunesh Rustagi, Vikas V. Patel, Manoj Sharma
  • Patent number: 9935728
    Abstract: Example embodiments of the present invention relate to an optical node comprising of at least two degrees, a plurality of directionless add/drop ports, a plurality of primary WDM transmitters and receivers, and at least one protection WDM transmitter and receiver, wherein the at least one protection WDM transmitter and receiver can transmit and receive in place of any of the plurality of primary WDM transmitters and receivers.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: April 3, 2018
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 9929940
    Abstract: In general, techniques are provided for described herein that extend existing Ethernet Virtual Private Network (EVPN) protocol signaling mechanisms so that local, multi-homing PEs couple to an Ethernet segment can definitively convey their primary/backup designated forwarder (DF) status to any remote PE of the EVPN. In one example, this is accomplished by utilizing a new extended community attribute to each Ethernet A-D per EVI route advertised by each of the multi-homing PEs to specifically carry the advertising PE's primary or backup status. As such, any receiving remote PE need not rely on the arrival of individual MAC routes from a new primary PE and withdrawal of MAC routes from a former primary PE to update its forwarding information.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: March 27, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Nitin Singh, Ryan Bickhart, Manoj Sharma, Hassan C. Hosseini
  • Patent number: 9929941
    Abstract: In one embodiment, a method includes identifying at a first edge device, a failure at a second edge device, the first and second edge devices located in a local network site in communication with remote network sites in an overlay network, changing a state of a routing locator address at the first edge device from down to up in response to the failure at the second edge device, the routing locator address initially associated with the second edge device, and advertising the routing locator address at the first edge device in an underlay network so that packets from the remote network sites are forwarded to the first edge device upon convergence in the underlay network. An apparatus and logic are also disclosed herein.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: March 27, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Peng Wang, Jeffrey Cai, Bo Sun, Yu Jiang
  • Patent number: 9898469
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for streaming external data in parallel from a second distributed system to a first distributed system. One of the methods includes receiving a query that requests a join of first rows of a first table in a first distributed system with second rows of an external table, the external table representing data in a second distributed system. Each of the segment nodes communicates with a respective extension service that obtains fragments from one or more data nodes of the second distributed system according to location information for the respective fragments, and provides to the segment node a stream of data corresponding to second rows of the external table. Each of the segment nodes computes joined rows between the first rows of the first table and the stream of data corresponding to second rows of the external table.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: February 20, 2018
    Assignee: Pivotal Software, Inc.
    Inventors: Dov Yaron Dorin, Alon Goldshuv, Alex Shacked, Luke Lonergan
  • Patent number: 9900756
    Abstract: A computer-implemented method, comprises: providing, by a computing device, a policy notification to selected one or more user devices via a primary communications channel to cause the selected one or more user devices to update a policy when the policy notification is received by the user device; and providing, by the computing device, an alternate policy to the selected one or more user devices via an alternate communications channel when the selected one or more user devices does not receive the policy notification via the primary communications channel, wherein providing the alternate policy notification causes the selected one or more user devices to update the policy.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: February 20, 2018
    Assignee: KONY, INC.
    Inventors: Matthew B. Trevathan, Keith Katz
  • Patent number: 9893930
    Abstract: A method for processing data forwarding and a Service Provider-end Provider Edge (SPE) are disclosed, including the following steps: the SPE configuring data forwarding information which includes a corresponding relationship between Multi Segment Pseudo Wires (MSPW) information and forwarding information of an MSPW protection link group or a corresponding relationship between the MSPW information and forwarding information of other MSPW except the forwarding information of the MSPW protection link group (101); the SPE receiving a service message (102) carrying the MSPW information; the SPE querying the forwarding information of the MSPW protection link group or the forwarding information of other MSPW except the forwarding information of the MSPW protection link group (103); and the SPE performing label encapsulation and forwarding according to the queried-out forwarding information of the MSPW protection link group or forwarding information of other MSPW except the forwarding information of the MSPW protecti
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 13, 2018
    Assignee: ZTE Corporation
    Inventors: Shihua Wu, Juan Li
  • Patent number: 9887875
    Abstract: Systems and methods for providing Open Systems Interconnection (OSI) layer 3 highly-available routers. An example method comprises: receiving a request to create a highly-available (HA) virtual router; configuring a HA virtual router to run on a plurality of network nodes, the HA virtual router comprising a master instance and a plurality of standby instances; assigning a floating Internet Protocol (IP) address associated with the virtual router to an internal network interface of the master instance; responsive to detecting a failure of the master instance of the HA virtual router, identifying a standby instance to act as a new master instance; and assigning the floating IP address to an internal network interface of the new master instance.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 6, 2018
    Assignee: Red Hat Israel, Ltd.
    Inventor: Assaf Muller
  • Patent number: 9883482
    Abstract: A radio access network node and methods are described herein for signaling an indication of a network restart to wireless devices within a cellular network. In one embodiment, the radio access network node is operable to: (1) signal, to the wireless devices, an indication that a network restart has occurred in a core network node in a pool of core network nodes in the cellular network; and (2) receive, from at least one of the wireless devices, a re-registration message in response to the signaling of the indication that the network restart has occurred. The wireless device and methods implemented by the same are also described herein.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: January 30, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Nicklas Johansson, John Walter Diachina, Mårten Sundberg, Olof Liberg, Paul Schliwa-Bertling
  • Patent number: 9858163
    Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: January 2, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Dhananjaya Rao, Victor M. Moreno, Hasmit Grover, Gaurav Badoni
  • Patent number: 9853723
    Abstract: Disclosed is an optical network system including a upper network equipment, a lower network equipment, and a plurality of transfer network equipments connecting the upper network equipment and the lower network equipment through independent optical links, wherein the lower network equipment performs switching such that transmission and reception of an optical signal are performed through an optical link of a standby line when a failure occurs in at least one of an optical link used as a working line, an optical interface device associated with the working line in the upper network equipment, and a transfer network equipment associated with the working line.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: December 26, 2017
    Assignee: SOLiD, INC.
    Inventors: Tae Hyeong Kim, Jong Yeong Lim, Jongsin Kim, Eunho Lee
  • Patent number: 9838472
    Abstract: A method for electing a master blade in a virtual application distribution chassis (VADC), includes: sending by each blade a VADC message to each of the other blades; determining by each blade that the VADC message was not received from the master blade within a predetermined period of time; in response, sending a master claim message including a blade priority by each blade to the other blades; determining by each blade whether any of the blade priorities obtained from the received master claim messages is higher than the blade priority of the receiving blade; in response to determining that none of the blade priorities obtained is higher, setting a status of a given receiving blade to a new master blade; and sending by the given receiving blade a second VADC message to the other blades indicating the status of the new master blade of the given receiving blade.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 5, 2017
    Assignee: A10 NETWORKS, INC.
    Inventors: Rajkumar Jalan, Dennis Oshiba
  • Patent number: 9832049
    Abstract: A communication network includes relaying apparatuses, each including redundant-route ports providing communication routes between the relaying apparatuses. The relaying apparatus determines whether a first frame received via a usual port is highly important. The first frame being highly important is transmitted via the respective redundant-route ports; the first frame being not highly important is transmitted via one redundant-route port. The relaying apparatus receives a second frame being highly important via the respective redundant-route ports; the second frame has a transmission destination corresponding to an apparatus connected with the relaying apparatus via the usual port. The relaying apparatus makes determination whether or not all the second frames received via the respective redundant-route ports accord with each other. With affirmative determination, one of the second frames is transferred to the transmission destination. With negative determination, all the second frames are cancelled.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: November 28, 2017
    Assignee: DENSO CORPORATION
    Inventor: Yoshifumi Kaku
  • Patent number: 9819590
    Abstract: A method and an apparatus for notifying a network abnormality are provided. An OpenFlow switch detects whether an abnormality occurs in an OpenFlow network. The OpenFlow switch sends a first asynchronous message for describing the abnormality occurring in the OpenFlow network to a controller when detecting an abnormality occurring in the OpenFlow network, so that the controller processes, according to the first asynchronous message, the abnormality occurring in the OpenFlow network. In this way, the abnormality in the network is notified in time, thereby improving efficiency in processing the abnormality in the OpenFlow network. A technical problem in the prior art that an abnormality occurring in an OpenFlow network and caused by an unexpected event cannot be notified in time, so that the abnormality occurring in the OpenFlow network cannot be processed in time and efficiency in processing the abnormality occurring in the OpenFlow network is relatively low is solved.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: November 14, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Binzhang Fu, Guolong Jiang
  • Patent number: 9819505
    Abstract: A method is provided in one example and includes assigning a virtual switch identifier to a group of a plurality of switches in which each of the plurality of switches is configured with a redundancy protocol. The method further includes configuring a redundancy protocol priority value for each the plurality of switches, and generating at least one link-state routing protocol message including priority information indicative of the redundancy protocol priority value associated with one or more of the plurality of switches. The method further includes distributing the at least one link-state routing protocol message to one or more of the plurality of switches.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: November 14, 2017
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Arvind Bhaskar Bhat, Naveen Gowda, Ramkumar Sankar
  • Patent number: 9794018
    Abstract: An optical network system includes an optical line terminal, an optical splitter that is connected to the optical line terminal via one first optical fiber, and a plurality of optical network units that are connected to the optical splitter via respective second optical fibers. The plurality of optical network units communicate with the optical line terminal using an optical signal of a working wavelength uniquely assigned to each of them. The optical line terminal communicates with an optical network unit that is connected to the optical splitter using an optical signal of a working wavelength and an optical signal of a spare wavelength that is common to a plurality of optical networks.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: October 17, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Masamitsu Komi, Tadanori Yokosawa, Hirokazu Shimada, Tamotsu Inoue
  • Patent number: 9787532
    Abstract: A module has switchable operation states. A first switching unit switches the module between a first operation state and a second operation state. A first interface switches between sending signals to another module which has switchable operation states and receiving signals from the other module. The first interface sends a first signal to the other module when the module is in the first operation state, sends a second signal to the other module when the module is to be switched into the second operation state, and receives signals from the other module when the module is in the second operation state. A second interface communicates with the other module. When the second interface receives a response of the other module to the second signal, the first switching unit switches the module into the second operation state. The reliability of module switching is improved in an embodiment.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 10, 2017
    Assignee: ABB Schweiz AG
    Inventors: Ye Xu, Jiaqi Wang, Guozi Mu, Dieter Henkel, Axel Lohbeck
  • Patent number: 9768838
    Abstract: A reconfigurable RF receive diplexer, which includes a first hybrid RF coupler, a second hybrid RF coupler, and reconfigurable RF filter circuitry, is disclosed. The reconfigurable RF receive diplexer receives a first adjunct RF antenna receive signal via a first isolation port to provide a first adjunct RF receive signal via a second main port. The reconfigurable RF receive diplexer further receives a first RF transmit signal via a first main port to provide a first RF antenna transmit signal via the first isolation port. The reconfigurable RF receive diplexer operates in each of a group of operating modes, such that during a first operating mode, a carrier frequency of the first adjunct RF antenna receive signal is within a first RF communications band; and during a second operating mode, a carrier frequency of the first adjunct RF antenna receive signal is within a second RF communications band.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: September 19, 2017
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Marcus Granger-Jones