Patents Assigned to Juniper Networks
  • VPN network client for mobile device having fast reconnect
    Patent number: 8464336
    Abstract: A virtual private network client for cellular mobile devices is described. The VPN network client establishes a secure VPN connection with a remote VPN security device. The VPN network client establishes a secure control channel with the secure VPN gateway and, upon a successful authentication, receives a session cookie with a unique identifier. In the event communication with the secure VPN gateway is subsequently temporarily lost, the VPN network client performs a fast reconnect without requiring re-authentication of the cellular mobile device by communicating the session cookie to the secure VPN gateway.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Yin Wei, Subramanian Iyer, Richard Campagna, James Wood
  • Use of group poll scheduling for broadband communication systems
    Patent number: 8462763
    Abstract: A group poll mechanism (GPM) that schedules upstream bandwidth for cable modems by pointing a request opportunity normally reserved for a single service flow to more than one service flow. Essentially, instead of using the seldom-used poll requests one per service flow, this same request opportunity is pointed to multiple service flows. In such kind of a scheme the GPM gives the same mini-slot to multiple service flows. The GPM implements the use of place-holder SIDs and novel mapping of information elements in MAP messages.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventor: Nurettin Burcak Beser
  • Self-cleaning mechanism for error recovery
    Patent number: 8462804
    Abstract: A system manages a buffer having a group of entries. The system receives information relating to a read request for a memory. The system determines whether an entry in the buffer contains valid information. If the entry is determined to contain valid information, the system transmits the information in the entry in an error message. The system may then store the received information in the entry. In another implementation, the system stores data in one of the entries of the buffer, removes an address corresponding to the one entry from an address list, and starts a timer associated with the one entry. The system also determines whether the timer has exceeded a predetermined value, transferring the data from the one entry when the timer has exceeded the predetermined value, and adds the address back to the address list.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Anurag P. Gupta, Song Zhang
  • Precision timing using a modified synchronization operation
    Patent number: 8462821
    Abstract: A master node is configured to receive, from a slave node, a request to perform a modified two-step synchronization (sync) operation in a manner that precludes transmitting a follow-up packet; generate a sync packet in a manner that includes information associated with a previous time that a prior sync packet was transmitted to the slave node; transmit the sync packet to the slave node; receive, from the slave node, a delay request packet; transmit, to the slave node, a delay response packet, where the delay response packet stores information associated with another time at which the delay request packet was received, and where transmitting the delay response packet enables the slave node to calibrate a clock, hosted by the slave node, to a master clock, hosted by the master node, based on the previous time and the other time.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Muhammad Sagarwala, John Johnson
  • Resource reservation protocol with traffic engineering point to multi-point label switched path hierarchy
    Patent number: 8462635
    Abstract: The invention is directed toward techniques for Multi-Protocol Label Switching (MPLS) upstream label assignment for the Resource Reservation Protocol with Traffic Engineering (RSVP-TE). The techniques include extensions to the RSVP-TE that enable distribution of upstream assigned labels in Path messages from an upstream router to two or more downstream routers of tunnel established over a network. The tunnel may comprise a RSVP-TE P2MP Label Switched Path (LSP) or an Internet Protocol (IP) multicast tunnel. The techniques also include extensions to the RSVP-TE that enable a router to advertise upstream label assignment capability to neighboring routers in the network. The MPLS upstream label assignment using RSVP-TE described herein enables a branch router to avoid traffic replication on a Local Area Network (LAN) for RSVP-TE P2MP LSPs.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Rahul Aggarwal, Yakov Rekhter
  • Hybrid weighted round robin (WRR) traffic scheduling
    Patent number: 8462802
    Abstract: A network device receives traffic associated with a network of intermediate network devices and user devices, classifies the received traffic, and allocates the classified traffic to traffic queues. The network device also schedules particular queued traffic, provided in the traffic queues and bound for particular intermediate network devices, using a hybrid weighted round robin (WRR) scheduler where the hybrid WRR scheduler schedules the particular queued traffic according to one of a 1-level WRR schedule, a 1.5 level WRR schedule, or a 2-level WRR schedule. The network device further provides the particular queued traffic to the particular intermediate network devices based on the scheduling of the hybrid WRR scheduler.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Aibing Zhou, John Johnson, Chang-Hong Wu, David J. Ofelt
  • Accurate measurement of packet size in cut-through mode
    Patent number: 8462815
    Abstract: A network device operating in a cut-through mode receives a current packet of an unknown length and determines if there is a known length value of a previous packet in a processing cycle associated with the current packet. When there is no known length value of the previous packet, the network device applies, to the current packet, an estimated length value for the current packet. When there is a known length value of the previous packet, the network device applies, to the current packet, the known length value of the previous packet. The network device processes the current packet based on one of the estimated length value or the known length value of the previous packet.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: June 11, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Sreenivas Voruganti, Balaji Murali, Ashish Pal, Rahul Jain, Sainath Cheruvu
  • AUTOMATIC SOFTWARE UPDATE ON NETWORK DEVICES
    Publication number: 20130145356
    Abstract: A method may include contacting, by a network device, another device to obtain at least one of a network address, authentication, or authorization, receiving, from the other device, software update information that identifies an up-to-date software that the network device should have installed and location information that identifies a location from which to retrieve the up-to-date software, comparing, by the network device, the software update information to software information that identifies software currently installed on the network device, retrieving, by the network device, the up-to-date software based on the software update information and the location information when the software update information and the software information do not match, and auto-installing, by the network device, the up-to-date software.
    Type: Application
    Filed: February 5, 2013
    Publication date: June 6, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: JUNIPER NETWORKS, INC.
  • VIRTUAL LOCAL AREA NETWORK (VLAN)-BASED MEMBERSHIP FOR MULTICAST VLAN REGISTRATION
    Publication number: 20130142199
    Abstract: A network node that includes a memory to store a multicast forwarding table that contains entries that govern how multicast traffic is to be forwarded from a multicast virtual local area network (MVLAN) associated with the network node, to receiver VLANs associated with the network node, where each entry includes a multicast group, that is associated with a group of ports on the multicast VLAN via which the multicast traffic is received, and information associated with the receiver VLANs to which the received multicast traffic is to be sent.
    Type: Application
    Filed: February 5, 2013
    Publication date: June 6, 2013
    Applicant: Juniper Networks, Inc.
    Inventor: Juniper Networks, Inc.
  • POLICY EVALUATION IN CONTROLLED ENVIRONMENT
    Publication number: 20130145421
    Abstract: A module may include interface logic to receive information identifying a state related to a client device via logic related to a controlled environment, and to send a valid policy result to a host device, where the valid policy result is related to the state. The module may include processing logic to process policy content according to a resource policy, where the processing is based on the information, and to produce the valid policy result based on the processing using the resource policy, where the valid policy result is adapted for use by the host device when implementing the network policy with respect to a destination device when the client device attempts to communicate with the destination device.
    Type: Application
    Filed: December 27, 2012
    Publication date: June 6, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: JUNIPER NETWORKS, INC.
  • INCREASING MEAN TIME BETWEEN FAILURES FOR POWER SUPPLIES
    Publication number: 20130144454
    Abstract: A redundant power supply may obtain a rule for increasing mean time between failures (MTBF) for a first internal power supply and a second internal power supply connected to an electronic device, apply the rule to the first and second power supplies, activate the second internal power supply based on the rule to permit the second internal power supply to provide power to the electronic device, and deactivate the first internal power supply based on the rule.
    Type: Application
    Filed: November 26, 2012
    Publication date: June 6, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: JUNIPER NETWORKS, INC.
  • SYSTEMS AND METHODS FOR IMPLEMENTING VIRTUAL SWITCH PLANES IN A PHYSICAL SWITCH FABRIC
    Publication number: 20130142197
    Abstract: A switching device includes multiple interfaces and a switch fabric. The switch fabric includes switch integrated circuits arranged in a number of stages. Multiple virtual switch planes may be implemented in the switch fabric. Data traffic received at the interfaces is selectively assigned to different ones of the virtual switch planes.
    Type: Application
    Filed: November 26, 2012
    Publication date: June 6, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: Juniper Networks, Inc.
  • VPN network client for mobile device having dynamically translated user home page
    Patent number: 8458787
    Abstract: A virtual private network (VPN) client for cellular mobile devices is described. The VPN network client processes network packets for securely tunneling the network packets between the cellular mobile device and the remote VPN security device. Upon establishing the VPN connection, the VPN network client receives a web-based home page from the secure VPN device via a secure response, dynamically parses bookmark links from the secure response and renders a bookmark window using input controls native to the cellular mobile device without invoking a web browser on the cellular mobile device. Each of the input controls corresponds to a different one of the bookmarks parsed from the secure response. Upon selection of one of the input controls, the VPN network client formulates and outputs an appropriate request to the secure VPN device as if a corresponding one of the bookmark links were selected by the user.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: June 4, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Yin Wei, Subramanian Iyer, Richard Campagna, James Wood
  • Applying backpressure to a subset of nodes in a deficit weighted round robin scheduler
    Patent number: 8457142
    Abstract: A scheduler in a network element may include a dequeuer to dequeue packets from a set of scheduling nodes using a deficit weighted round robin process, where the dequeuer is to determine whether a subset of the set of scheduling nodes is being backpressured. The dequeuer may set a root rich most negative credits (MNC) value, associated with a root node, to a root poor MNC value, associated with the root node, and set the root poor MNC value to zero, when the subset is not being backpressured, and may set the rich MNC value to a maximum of the root poor MNC value and a root backpressured rich MNC value, associated with the subset, and set the root poor MNC value to a root backpressured poor MNC value, associated with the subset, when the subset is being backpressured.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: June 4, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Gary Goldman, Srihari Vegesna
  • Verifying integrity of network devices for secure multicast communications
    Patent number: 8458462
    Abstract: A network device, such as an access control server, verifies the integrity of other network devices requiring access to a secure multicast. The network device receives a health status report from the other network devices and grants or denies access to the secure multicast based on a comparison of the health status report with a set of one or more stored policies. The network device then provides group keys to authorized network devices. The network device may also include a monitoring module that monitors activities of authorized network devices. Where the network device monitors authorized network devices, authorized network devices with behavior that fails to satisfy one or more behavioral policies will have their authorization revoked and will no longer have access to the secure multicast.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: June 4, 2013
    Assignee: Juniper Networks, Inc.
    Inventor: Stephen R. Hanna
  • WRR SCHEDULER CONFIGURATION FOR OPTIMIZED LATENCY, BUFFER UTILIZATION
    Publication number: 20130136141
    Abstract: A method includes receiving network information for calculating weighted round-robin (WRR) weights, calculating WRR weights associated with queues based on the network information, and determining whether a highest common factor (HCF) exists in relation to the calculated WRR weights. The method further includes reducing the calculated WRR weights in accordance with the HCF, when it is determined that the HCF exists, and performing a WRR scheduling of packets, stored in the queues, based on the reduced WRR weights.
    Type: Application
    Filed: December 31, 2012
    Publication date: May 30, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: JUNIPER NETWORKS, INC.
  • APPARATUS AND METHOD FOR DATA TRANSMISSION
    Publication number: 20130136137
    Abstract: Local concentration of accessing loads on a data buffer during data cell reading is reduced. Also, by providing sufficient time for a data cell reading operation with respect to data cell transmission timing, transmission rate fluctuation of CBR data cells in a transmitting side is reduced. When transmission of a new data stream is added, controller in a cell control unit refers to a transmitted data cell count of VC information processed through a slot immediately before. The controller determines whether a data cell transmitted through the slot immediately before is a head portion of a packet or not. If the data cell transmitted through the slot immediately before is the head portion of the packet, the controller only adds the VC information of the data stream to a shaper link list, and withholds transmission of the data cell.
    Type: Application
    Filed: December 27, 2012
    Publication date: May 30, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: JUNIPER NETWORKS, INC.
  • SEQUENCING PACKETS FROM MULTIPLE THREADS
    Publication number: 20130136134
    Abstract: A device may reserve a slot for a received packet in a packet ordering queue (POQ), convey the packet to one of a plurality of threads for processing, obtain the packet from the one of the plurality of threads after the packet has been processed, organize the packet in the POQ in accordance with a position of the reserved slot, and release the packet from the POQ if the reserved slot is a head of the POQ.
    Type: Application
    Filed: January 25, 2013
    Publication date: May 30, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: Juniper Networks, Inc.
  • Coarse time synchronization
    Patent number: 8451958
    Abstract: A system for determining the burst start timing of a signal includes logic configured to receive the signal, generate correlation moduli and generate a first timing output based on the correlation moduli. The logic may also be configured to receive operating mode information and timing information and generate search controls. The logic may further be configured to identify a maximum of the correlation moduli using the search controls and determine a second timing output associated with the maximum correlation modulus. The second timing output represents a more accurate approximation of a burst start time than the first timing output.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: May 28, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Joseph Boutros, Emmanuel Lemois
  • Fixed attenuation air gap interface for a multimode optical fiber interconnection
    Patent number: 8452152
    Abstract: A fiber-to-fiber connector system that includes a first connector for housing a portion of a first fiber, where the first fiber is terminated by a first end-face. The fiber-to-fiber connection system also includes a second connector for housing a portion of a second fiber, where the second fiber is terminated by a second end-face, where the first connector and the second connector permit the first fiber and the second fiber to be interconnected to form an air gap interface between the first end-face and the second end-face; the air gap interface defines a spacing between the first end-face and the second end-face; and the air gap interface enables, based on the defined spacing, an optical signal to be transmitted between the first fiber and the second fiber with a fixed quantity of attenuation.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: May 28, 2013
    Assignee: Juniper Networks, Inc.
    Inventor: Mark Marino