Patents Assigned to Juniper Networks, Inc.
  • Antivirus intelligent flow framework
    Patent number: 8533834
    Abstract: A device receives a data transaction associated with packet, determines a risk level associated with the data transaction, and performs a content type check for the data transaction. The device also performs an infected content check for the data transaction, and classifies, based on the determined risk and the performed checks, the data transaction for one of a slow path virus scanning process or a fast path virus scanning process. The device further performs, based on the classification, one of the slow path virus scanning process or the fast path virus scanning process on the data transaction.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Peter Wong, De Xiong Li, Chunqing Cheng
  • Multiple stream adaptive bit rate system
    Patent number: 8532171
    Abstract: A method and apparatus for segmenting multiple live media streams of differing qualities into a single output stream. The live media streams may have constant or unpredictable key frame intervals.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: September 10, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Karthik Narayanan, Zubair Visharam, Sunil Mukundan
  • Data unit information transformation
    Patent number: 8531964
    Abstract: A packet scheduler may include logic configured to receive packet information. The packet scheduler may include logic to receive an operating parameter associated with a downstream device that operates with cell-based traffic. The packet scheduler may include logic perform a packet to cell transformation to produce an output based on the operating parameter. The packet scheduler may include logic to use the output to compensate for the downstream device.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: September 10, 2013
    Assignee: Juniper Networks, Inc.
    Inventor: John C. Carney
  • Distributed origin content delivery network
    Patent number: 8533280
    Abstract: Updating a node of a content delivery network is disclosed. In some embodiments, an indication of an event associated with a piece of content, which event is associated with a change in a corpus of content associated with a content delivery network, is received at a node of the content delivery network; and in response to the received indication, an action is performed at the node, if applicable, such that at least a portion of the corpus of content associated with the content delivery network stored at the node is updated based on the event.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: September 10, 2013
    Assignees: BitGravity, Inc., Juniper Networks, Inc.
    Inventors: Donald Peregrine Clarke, Edward Deitz Crump, Barrett Gibson Lyon
  • MULTI-CHASSIS ROUTER WITH MULTIPLEXED OPTICAL INTERCONNECTS
    Publication number: 20130230322
    Abstract: A multi-chassis network device includes a plurality of nodes that operate as a single device within the network and a switch fabric that forwards data plane packets between the plurality of nodes. The switch fabric includes a set of multiplexed optical interconnects coupling the nodes. For example, a multi-chassis router includes a plurality of routing nodes that operate as a single router within a network and a switch fabric that forwards packets between the plurality of routing nodes. The switch fabric includes at least one multiplexed optical interconnect coupling the routing nodes. The nodes of the multi-chassis router may direct portions of the optical signal over the multiplexed optical interconnect to different each other using wave-division multiplexing.
    Type: Application
    Filed: April 18, 2013
    Publication date: September 5, 2013
    Applicant: Juniper Networks, Inc.
    Inventor: Pradeep Sindhu
  • Method and apparatus for fast reroute in a connection-oriented network
    Patent number: 8526298
    Abstract: A method and an apparatus for rapidly resuming, at times of failures, network traffic in a connection-oriented network by using an alternative route pre-computed and stored locally in nodes along an initial route without requiring signaling of upstream nodes or a master server.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: September 3, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Der-Hwa Gan, Anthony Joseph Li
  • Lock-less access of pre-allocated memory buffers used by a network device
    Patent number: 8526326
    Abstract: In general, the present disclosure describes techniques for both removing memory buffers from and adding memory buffers to a list (e.g., a linked list) of available buffers, for use by a network device, without locking the list during access. One example method includes allocating a list of memory buffers that are each available for use by multiple modules executed within the network device, wherein the list includes a first end and a second, opposite end, and removing a first memory buffer from the first end of the list by a first module of the multiple modules without locking the list. The method further includes adding the first memory buffer to the second end of the list by a second module of the multiple modules without locking the list.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: September 3, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Monty S. Gill, Yi Sun
  • SYSTEMS AND METHODS FOR EQUAL-COST MULTI-PATH VIRTUAL PRIVATE LAN SERVICE
    Publication number: 20130223283
    Abstract: A provider edge device, associated with a virtual private local area network service (VPLS) system, includes a memory to store instructions to implement a pseudowire mechanism to receive a first data frame from a source customer edge (CE) device associated with the VPLS system, incorporate the first data frame into a first VPLS packet, determine whether the source CE device is a single-homed CE device or a multi-homed CE device, and incorporate, into the first VPLS packet, a first pseudowire label, if the source CE device is a single-homed CE device, and incorporate, into the first VPLS packet, a second pseudowire label, different from the first pseudowire label, if the source CE device is a multi-homed CE device; and a processor to execute the instructions.
    Type: Application
    Filed: April 5, 2013
    Publication date: August 29, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventor: Kireeti KOMPELLA
  • PACKET SPRAYING FOR LOAD BALANCING ACROSS MULTIPLE PACKET PROCESSORS
    Publication number: 20130223224
    Abstract: A network device includes multiple packet processing engines implemented in parallel with one another. A spraying component distributes incoming packets to the packet processing engines using a spraying technique that load balances the packet processing engines. In particular, the spraying component distributes the incoming packets based on queue lengths associated with the packet processing engines and based on a random component. In one implementation, the random component is a random selection from all the candidate processing engines. In another implementation, the random component is a weighted random selection in which the weights are inversely proportional to the queue lengths.
    Type: Application
    Filed: April 5, 2013
    Publication date: August 29, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: Dennis C. FERGUSON, Chi-Chung Chen, Thomas M. Skibo
  • PEER DISCOVERY AND SECURE COMMUNICATION IN FAILOVER SCHEMES
    Publication number: 20130227022
    Abstract: A system discovers peer nodes in a failover system, establishes a secure channel between at least two of the peer nodes, and exchanges state information over the secure channel.
    Type: Application
    Filed: April 2, 2013
    Publication date: August 29, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: Atul Narendra TRIVEDI, Steven A. MALMSKOG
  • Transmit-buffer management for priority-based flow control
    Patent number: 8520522
    Abstract: A network device operating in operating in a Priority Flow Control (PFC) mode receives a stream of packets for outputting on a particular port, assigns each packet in the stream of packets to one of multiple buffer queues associated with the port, and generates, based on the assigning, packet counts for the multiple buffer queues. The network device aggregates the packet counts for a group of particular buffer queues, of the multiple buffer queues, that are not subject to a PFC restriction, to create an unrestricted aggregated count. The network device determines whether the unrestricted aggregated count exceeds a flow-control threshold for the group of particular buffer queues and sends, to an upstream queue scheduler, a flow control signal when the unrestricted aggregated count exceeds a flow-control threshold.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Gary Goldman, Paul Kim, Chang-Hong Wu
  • Breakout gateway for mobile data traffic
    Patent number: 8520615
    Abstract: In general, the invention is directed to techniques for breaking out mobile data traffic from a mobile service provider network to a packet data network. For example, as described herein, a breakout gateway device (BGW) receives a first service request and data traffic for a data session associated with the requested service from a mobile device in a radio access network, wherein the first service request is addressed to a serving node of a mobile core network of the mobile service provider network, and wherein the data traffic is destined for the PDN. A control packet analysis module forwards the first service request from the breakout gateway device to the serving node. A breakout module of the BGW bypasses the serving node by sending the data traffic from the breakout gateway device to the PDN on a data path from the radio access network to the PDN.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Apurva Mehta, Kumar Mehta, Krishna Sankaran, Sanjiv Doshi, Srinivasa Chaganti, Bin Hong
  • Reducing data transfer for matching patterns
    Patent number: 8521701
    Abstract: A device may receive a packet, obtain data from the packet, store the data in a memory, and send a request to match a portion of the data to a set of patterns, the request identifying the portion in the memory. In addition, the device may access the portion in the memory based on the request, compare the accessed portion to the set of patterns, generate a result by comparing the accessed portion to the set of patterns, and output the result.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Krishna Narayanaswamy, Sunil Ravi
  • Optimization of packet buffer memory utilization
    Patent number: 8522111
    Abstract: A method performed by an I/O unit connected to another I/O unit in a network device. The method includes receiving a packet; segmenting the packet into a group of data blocks; storing the group of data blocks in a data memory; generating data protection information for a data block of the group of data blocks; creating a control block for the data block; storing, in a control memory, a group of data items for the control block, the group of data items including information associated with a location, of the data block, within the data memory and the data protection information for the data block; performing a data integrity check on the data block, using the data protection information, to determine whether the data block contains a data error; and outputting the data block when the data integrity check indicates that the data block does not contain a data error.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Pradeep Sindhu, Srihari Vegesna
  • System and method for efficient packet replication
    Patent number: 8520675
    Abstract: Methods and systems consistent with the present invention provide efficient packet replication in a router in order to multicast a stream of data. Packets are replicated and processed in a multithreaded environment. Embodiments consistent with the present invention implement a two-stage process for packet replication. The first stage thread will recirculate the packet to multiple second-stage threads. These second-stage threads will then create one or more outgoing copies of the packet. In this way, the copies are handled by multiple threads running in parallel.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Jean-Marc Frailong, Jeffrey G. Libby, Anurag P. Gupta, John Keen, Rajesh Nair, Avanindra Godbole, Sharada Yeluri
  • Address learning in a layer two bridging network
    Patent number: 8520680
    Abstract: A network system includes a provider backbone bridged network (PBBN) and a multi-homed provider bridge network (PBN) having an L2 switch that operate as backboned edge bridge (BEBs) to bridge L2 packets between the PBN and the PBBN. The L2 switch executes a PBBN routing instance and a separate PBN routing instance. A plurality of packet-forwarding engine (PFE) of the L2 switch are configured to forward L2 packets between interfaces of the PBN routing instance and the PBBN routing instance. The PFEs store L2 network address tables that specify L2 network addresses reachable by the interfaces. The PFEs of the L2 switch are configured to selectively share L2 network addresses between the L2 network address tables of the PBN routing instance and the L2 network address tables of the PBBN routing instance.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Sanjiv Doshi, Iswar Biswal, Kumar Mehta, Jagadish Grandhi
  • Measuring network traffic based on predicted amount of padding
    Patent number: 8521870
    Abstract: A system measures traffic in a device. The system tracks an amount of data and the data units and predicts the amount of padding associated with the data units. The system determines the amount of traffic in the device based on the predicted padding, the amount of data, and the number of data units.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: August 27, 2013
    Assignee: Juniper Networks, Inc.
    Inventor: Spencer Greene
  • CHASSIS SYSTEM WITH FRONT COOLING INTAKE
    Publication number: 20130213909
    Abstract: A line card includes a metal frame that includes a front section, and a bottom section connected to the front section via an angled section, where the angled section results in an opening between the line card and a second line card, when the line card is installed above the second line card in a rack, and where the opening allows directed air to enter the rack from a front direction; a printed circuit board attached to the metal frame; and a group of front panel connectors attached to the front section of the metal frame.
    Type: Application
    Filed: March 22, 2013
    Publication date: August 22, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: Boris REYNOV, Jack KOHN, Euan F. MOWAT, Shreeram SIDDHAYE, Ben NITZAN, Mahesh NAGARAJAN
  • MULTI-INTERFACE COMPATIBLE BUS OVER A COMMON PHYSICAL CONNECTION
    Publication number: 20130215911
    Abstract: A multi-interface bus allows for different bus standards to be implemented over the same set of physical bus lines. More particularly, in one implementation, the system includes a first circuit board, a second circuit board, and a bus connecting the first and second circuit boards. The second circuit board is configured to communicate with the first circuit board using either a synchronous or an asynchronous bus protocol determined based on a bus protocol used by the first circuit board.
    Type: Application
    Filed: March 22, 2013
    Publication date: August 22, 2013
    Applicant: Juniper Networks, Inc.
    Inventors: David P. Chengson, Jaya Bandyopadhyay
  • NETWORK PROVIDER BRIDGE MMRP REGISTRATION SNOOPING
    Publication number: 20130215892
    Abstract: A provider edge bridge in a service provider network receives multiple media access control (MAC) Registration Protocol (MMRP) registration messages from customer networks via tunnels. The provider edge bridge snoops the MMRP registration messages to obtain multicast MAC addresses from the registration messages, and tunnels the MMRP registration messages toward one or more other bridges. The provider edge bridge constructs multicast forwarding tables based on the multicast addresses obtained from snooping the MMRP registrations, and uses the multicast forwarding tables for forwarding data units from the provider edge bridge towards destinations.
    Type: Application
    Filed: March 29, 2013
    Publication date: August 22, 2013
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: Sri Sairam GOLI, CunZhi Lu, Ramanarayanan Ramakrishnan, Ramasamy Ramanathan