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Rama vasudevan juniper networks

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Filed: July 14, Methods and apparatus related to a flexible data center security architecture. Abstract: In one embodiment, edge devices can be configured to be coupled to a multi-stage switch fabric and peripheral processing devices.

The edge devices and the multi-stage switch fabric can collectively define a single logical entity. A first edge device from the edge devices can be configured to be coupled to a first peripheral processing device from the peripheral processing devices.

The second edge device from the edge devices can be configured to be coupled to a second peripheral processing device from the peripheral processing devices. The first edge device can be configured such that virtual resources including a first virtual resource can be defined at the first peripheral processing device. A network management module coupled to the edge devices and configured to provision the virtual resources such that the first virtual resource can be migrated from the first peripheral processing device to the second peripheral processing device.

Filed: September 18, Publication number: Abstract: A method includes applying, to a modulated digital signal, a forward error correction FEC including a low-density parity-check LDPC to produce a coded digital signal. Nyquist shaping is applied to the coded digital signal to generate a filtered digital signal.

A representation of the filtered digital signal is transmitted in an optical communication channel via a dense wavelength division multiplexing DWDM scheme. Type: Application. Filed: November 12, Publication date: March 3, Applicant: Juniper Networks, Inc. Using a programmable resource dependency mathematical model to perform root cause analysis. Abstract: A controller device manages a plurality of network devices.

The controller device includes a memory configured to store a dependency model representing dependencies between resources provided by the network devices and a programmed merge strategy, and one or more processors implemented in circuitry and configured to: determine the resources provided by the network devices; determine relationships between the resources according to the programmed merge strategy; construct the dependency model using the determined relationships; determine that at least one of the resources has experienced a failure; and perform a root cause analysis using the dependency mathematical model to determine a root cause of the failure of the at least one of the resources.

Filed: August 4, Date of Patent: March 1, Communicating state information in distributed operating systems. Abstract: In general, techniques are described for communicating state information in distribute operating system. A network device comprises a first hardware node and a second hardware node. The first hardware node may execute a first instance of a distributed operating system, and maintain a first data structure that stores a plurality of objects defining a portion of state information.

The second hardware node may execute a second instance of the distributed operating system, and maintain a second data structure that stores synchronized versions of the plurality of objects. The first hardware node may further receive updated state information, update the first data structure to include the updated state information, and synchronize the updated first data structure with the second data structure.

The second hardware node may synchronize the second data structure with the updated first data structure. Filed: December 28, Inventors: David M. Katz, Ross W. Callon, Scott Mackie, Dennis C. Initializing server configurations in a data center. Abstract: A system for configuring a data center includes a fabric management server coupled to a management switch.

A provisional Software Defined Networking SDN controller executing on the fabric management server can discover physical servers coupled to the management switch, receive network interface configuration information from the physical servers, and use the discovered network interface configuration information to determine a configuration for switches and servers coupled to an IP fabric.

The configuration can be migrated to a full functionality SDN controller. Filed: April 26, Date of Patent: February 22, Inventors: Tong Jiang, Sukhdev S. Adaptive control of secure sockets layer proxy. Abstract: A network device may decrypt a record received from a source device and associated with an encrypted session.

The network device may process the decrypted record. The network device may encrypt the record to generate an encrypted payload. The network device may store an entry in a retransmission mapping that includes a decryption key used to decrypt the record and an encryption key used to encrypt the record. The network device may transmit the encrypted payload in a first TCP packet toward the destination device.

The network device may receive retransmitted data and may determine, based on the record entry, that the retransmitted data is associated with the record. The network device may decrypt, using the decryption key, the retransmitted data and may re-encrypt, using the encryption key, the decrypted record. The network device may transmit, toward the destination device, the encrypted payload in a second TCP packet.

Filed: August 24, Inventor: Rajeev Chaubey. Multicast replication in 5G networks. The multicast stream is then received via a tunnel between the AGF node and UPF node that is associated with the computing device. The tunnel associated with the first computing device to request joining the multicast stream can be a primary tunnel for the multicast stream. Subsequent requests to join the same multicast stream can cause the AGF node add tunnels associated with the requesting computing devices as secondary tunnels.

The multicast stream is received via the primary tunnel and replicated to computing devices associated with the secondary tunnels.

A secondary tunnel may be promoted to a primary tunnel in response to a failure or disconnection of the primary tunnel. Filed: March 31, Inventors: Loganathan Nallusamy, Venkatesh Padebettu. Apparatus, system, and method for providing node protection across label-switched paths that share labels.

Abstract: The disclosed computer-implemented method may include 1 receiving, at a network node within a network, a packet from another network node within the network, 2 identifying, within the packet, a label stack that includes a plurality of labels that collectively represent at least a portion of a label-switched path within the network, 3 popping, from the label stack, a label that corresponds to a next hop of the network node, 4 determining, based at least in part on the label, that the next hop has experienced a failure that prevents the packet from reaching a destination via the next hop, 5 identifying a backup path that merges with the label-switched path at a next-to-next hop included in the label-switched path, and then 6 forwarding the packet to the next-to-next hop via the backup path.

Various other methods, systems, and apparatuses are also disclosed. Filed: September 20, Date of Patent: February 15, Proving prime integers for encryption. Abstract: A device may receive a set of cryptographic parameters associated with an integer, wherein the set of cryptographic parameters includes a linked list of potential prime integers, in an order, used to generate the integer.

The device may determine, iteratively and in the order, whether each potential prime integer included in the linked list of potential prime integers is a prime integer using a primality test or a lookup operation based on a set of proven prime integers. The device may determine whether the integer is a proven prime integer based on determining whether each potential prime integer included in the linked list of potential prime integers is a prime integer.

The device may authorize, when the integer is a proven prime integer, the integer for use in a cryptographic protocol. Filed: July 15, Inventors: Anna M. Johnston, Rathna Ramesh. At P 6 , the CPU transmits the packet template and the partial checksum over the second bus interface 34 to the bus slave How the software on the CPU determines the static fields in an embodiment of the invention is described with reference to Table 1.

Source Address can be determined by communicating with the network driver via an IOCTL, which is a standard way of communicating to a driver.

Version is hardcoded to 4, as described in RFC IHL is hardcoded to, for example, 20 and Type of Service is hardcoded to, for example, 4. Total Length is calculated based on the size of the whole length of the packet. Identification and Flags are determined based upon RFC Fragment Offset is hardcoded to zero. Time to Live can be changed by routers. Protocol is hardcoded to UDP. Header Checksum can be changed by routers. Source Address can be determined by Operating System Calls, enumerating the different network interfaces and identifying IP addresses associated with each interface.

This could be done, for example, using the ipconfig utility on Windows NT, for example. Destination Address is determined based on data provided by the user. Destination Address indicates where alerts are to be sent.

Source Port is whatever port is assigned by the Operating System as part of a bind call. Destination Port is the port number specified by the user. Length is calculated based on the size of the packet.

Total Packet Length depends on the length of the packet and is hardcoded. Type Version is set to 2. Type Community String is a value which indicates an octet string. It is hardcoded to 4 as described in RFC Length of Community String is the length of the actual community string provided by the user. Community String is the actual community string provided by the user. Length of Trap PDU is calculated to equal the length of the trap packet. Type Enterprise is hardcoded per RFC Length of Enterprise is calculated based on the length of the object identifier.

Enterprise is set to indicate the actual object identifier. IP Address is similar to the source IP address field and is determined from the operating system. Type Trap Type is to indicate that the type is integer. Length of Trap Type is to indicate the length of the type, in this case 1. Trap Type is to 6 to indicate that the Trap Type is enterprise specific. Type Specific Trap Type is to indicate that the type is integer.

Length of Specific Trap Type is to indicate the length of the type, for example, 3. Type Timestamp is to, for example, 43 to indicate that the type is timestamp. Length of Timestamp is to indicate the length of the timestamp. Timestamp is set based on a value of a timer. Type Sequence is set to, for example Sequence is set depending on the sequence number. Variable bindings is specific to a particular MIB. At P 10 , the ASIC 10 receives the template and partial checksum over the second bus 34 into the bus slave At P 20 , the packet template and partial checksum are passed through the registers 39 and the memory controller 33 to NVRAM At P 30 , an internally generated checksum is calculated for the contents of the template stored in RAM Table 1, below, shows the details of the packet and indicates which fields are unchanging or static.

As can be seen from the table, all fields are static with the exception of the UDP checksum, timestamp, sequence, and in some circumstances variable bindings.

However, the invention is not limited to the particular dynamic and static field arrangement shown in Table 1. For example, the Specific Trap Type field may be a dynamic field.

External events arrive into the ASIC 10 over an event bus 45 to the events block The timers block 40 includes a watchdog timer. During normal operations, software executing on the CPU sends a command over the second bus 34 to the bus slave 28 through the registers 39 to the watchdog timer in the timers block The command must be sent every predetermined time period, preferably every 5 minutes.

If the command is not sent by the CPU before the expiration of the predetermined time period, the watchdog timer expires, causing an indication to be sent from the timer block 40 to the events block 41 , thus causing an event to be generated. Software executing on the CPU can cause software-generated events. The software can cause such an event by sending a command over the second bus 34 to the bus slave 28 through the registers 39 to the events block 41 , which will generate an event by passing an.

This could be done by running the ipconfig, utility on Windows NT as an example Destina- 4 bytes Yes Filled in based on tion data provided by the Address user. The user specifies the destination address of where the alerts need to go to.

Port Whatever port is assigned by the OS as part of the bind call is used. Destina- 2 bytes Yes This is the port tion number specified by Port the user, which is used to determine the entity at the destina- tion that receives these packets.

Length 2 bytes Yes Calculated based on the size of this packet. Address Indicating IP address of sender as the type of the next field. Trap N bytes Yes to 6- to indicate Type Enterprise specific trap. The polled events block 44 , every predetermined period, for example, every five seconds, causes a command to be sent to the bus master 30 to at least one specific device on the second bus The command, for example, requests the specific device to send the contents of particular memory locations of the device over the second bus 34 via the bus master 30 to the polled events block The contents of the particular memory locations are indicative of the status of the specific device.

If the returned contents are determined to show an error status, then polled events block 44 provides an error indication to the events block 41 so that an event will be generated.

Data from the event processor 20 , including but not limited to an event code and event data, are sent to packet control 50 within the packet generator Packet control 50 accesses template storage in order to include the event code and event data into the packet template and causes the packet to be transmitted over the first bus 32 , via the bus master 30 , to the communication controller.

At P , the packet control 50 receives at least an event code and event data from the event processor At P , packet control 50 passes the event data and event code to template storage 24 , through the memory controller 33 to store the event code and event data in the packet template in RAM Event code and event data are preferably stored in the variable bindings field of the template. The ASIC 10 maintains a timer which is used to form a timestamp. At P , packet control 50 accesses the timer, forms the time stamp, increments a sequence number and inserts the time stamp into the timestamp field and the sequence number into the sequence field of the template stored in RAM 37 of template storage Packet control 50 stores the complete checksum into the checksum field of the UDP portion of the packet template.

At P , packet control causes the packet to be sent to the bus master 30 of bus control 26 for transmission over the first bus 32 to the communication controller, which subsequently transmits the packet over a shared medium, such as the Ethernet.

At P , devices on the second bus 34 are periodically polled, for example, every five seconds, by a command sent through the bus master 30 over the second bus 34 to each of the specific devices. The command is a command which, for example, commands the specific device to return a content of a portion of memory of the specific device. The content of the memory is indicative of a status of the specific device.

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Vasudevan juniper networks rama cognizant h1b news

Experience-First Networking with CEO Rami Rahim - Juniper Global Summit

Ram Vasudevan is an associate professor in Mechanical Engineering at the University of Michigan with an appointment in the University of Michigans Robotics Program. Jan 6, Revealing ferroelectric switching character using deep recurrent neural networks. Nature Communications | Journal article DOI: Contributors: Rama K. . Rama K Vasudevan. Multi-dimensional spectral-imaging is a mainstay of the scanning probe and electron microscopies, micro-Raman, and various forms of chemical imaging. In many cases, .