Patents by Inventor Shadab Nazar

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

  • Patent number: 10560328
    Abstract: Systems, methods, and computer-readable media for static network policy analysis for a network. In one example, a system obtains a logical model based on configuration data stored in a controller on a software-defined network, the logical model including a declarative representation of respective configurations of objects in the software-defined network, the objects including one or more endpoint groups, bridge domains, contexts, or tenants. The system defines rules representing respective conditions of the objects according to a specification corresponding to the software-defined network, and determines whether the respective configuration of each of the objects in the logical model violates one or more of the rules associated with that object. When the respective configuration of an object in the logical model violates one or more of the rules, the system detects an error in the respective configuration associated with that object.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: February 11, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Kartik Mohanram, Chandra Nagarajan, Sundar Iyer, Shadab Nazar, Ramana Rao Kompella
  • Patent number: 10554477
    Abstract: Systems, methods, and computer-readable media for aggregating and presenting network events in a network environment. In some embodiments, a system can maintain event correlation rules for aggregating \network events occurring in a network based on characteristics of previously occurring network events. Network events occurring in the specific network environment can be identified. The network events can be aggregated to form an aggregated network event using the event correlation rules maintained based on the characteristics of previously occurring network events. The aggregated network event can subsequently be presented to a user.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: February 4, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Shadab Nazar, Navneet Yadav, Azeem Suleman, Pavan Mamillapalli, John Thomas Monk, Chetan Narsude, Navjyoti Sharma, Gaurav Gupta
  • Patent number: 10505817
    Abstract: Aspects of the technology provide solutions for determining a time period (“epoch”) required to monitor or analyze a tenant network. Some implementations of the technology include a process for making automatic epoch determinations, which includes steps for identifying one or more network parameters for a tenant network, analyzing the tenant network using the network parameters to discover one or more configuration settings of the tenant network, and determining a first epoch for the tenant network, the first epoch corresponding with a period of time to complete analysis of the tenant network using the network parameters. In some aspects, the process can further include steps for generating a tenant profile for the tenant network, the tenant profile based on the network parameters, the first epoch, and the one or more configuration settings of the tenant network. Systems and machine-readable media are also provided.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: December 10, 2019
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Chetan Narsude, Gaurav Gupta, Shadab Nazar, Pavan Mamillapalli, Sundar Iyer
  • Patent number: 10437641
    Abstract: Aspects of the technology provide systems and methods for interleaving a processing task in a network monitoring appliance. A process of the technology could include steps for identifying operators in the network monitoring appliance, wherein the operators are sequentially arranged to form a processing pipeline, determining an epoch for the processing pipeline, wherein the epoch corresponds with a time duration required for a processing task to traverse the pipeline, and determining a time window in which a supplemental processing task can be interleaved into the processing pipeline, wherein the time window is based on the epoch. Machine-readable media are also provided.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 8, 2019
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Chetan Narsude, Gaurav Gupta, Azeem Suleman, Shadab Nazar, Pavan Mamillapalli, Sundar Iyer
  • Publication number: 20190081852
    Abstract: Systems, methods, and computer-readable media for clustering events occurring in a network environment for providing network assurance. In one embodiment, a system can identify event states of network events defined by values of parameters of a network environment. The system can determine a confidence score that at least one of the values of parameters is associated with a specific event state using the network events and the identified event states of the network events. The confidence score can be presented to a user for purposes of providing network assurance for the network environment.
    Type: Application
    Filed: September 12, 2017
    Publication date: March 14, 2019
    Inventors: Shadab Nazar, Azeem Suleman, Ayas Pani
  • Publication number: 20190081850
    Abstract: Systems, methods, and computer-readable media for aggregating and presenting network events in a network environment. In some embodiments, a system can maintain event correlation rules for aggregating \network events occurring in a network based on characteristics of previously occurring network events. Network events occurring in the specific network environment can be identified. The network events can be aggregated to form an aggregated network event using the event correlation rules maintained based on the characteristics of previously occurring network events. The aggregated network event can subsequently be presented to a user.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 14, 2019
    Inventors: Shadab Nazar, Navneet Yadav, Azeem Suleman, Pavan Mamillapalli, John Thomas Monk, Chetan Narsude, Navjyoti Sharma, Gaurav Gupta
  • Publication number: 20190081871
    Abstract: Systems, methods, and computer-readable media for detecting and reporting anomalies in a network environment for providing network assurance. In some embodiments, a system can determine confidence scores for at least one value of parameters of a network environment defining network events occurring in the network environment. The confidences scores can indicate a frequency that the defined network events have a specific event state. The confidence scores can be monitored to detect an anomaly in the network environment. In response to detecting the anomaly in the network environment, the system can determine a relevant network state of the network environment. The relevant network state of the network environment and the anomaly in the network environment can be presented to a user.
    Type: Application
    Filed: September 12, 2017
    Publication date: March 14, 2019
    Inventors: Shadab Nazar, Pavan Mamillapalli, Azeem Suleman, Jagdev singh Tur, Ayas Pani
  • Publication number: 20180365096
    Abstract: Aspects of the technology provide methods for aggregating error log data between multiple devices in a network monitoring appliance. A method of the technology can include steps for identifying a plurality of operators running in a network monitoring appliance, instantiating a plurality of sensors, wherein each of the plurality of sensors is associated with a respective one of the plurality of operators, and wherein each sensor is configured to capture error log data of its corresponding operator. In some aspects, the method can further include steps for aggregating error log data from two or more of the plurality of sensors. Systems and machine-readable media are also provided.
    Type: Application
    Filed: October 23, 2017
    Publication date: December 20, 2018
    Inventors: Pavan Mamillapalli, Shadab Nazar, Chetan Narsude, Gaurav Gupta, Azeem Suleman, Jagdev Singh Tur, Navjyoti Sharma
  • Publication number: 20180367417
    Abstract: Systems, methods, and computer-readable media for receiving one or more models of network intents, comprising a plurality of contracts between providers and consumers, each contract containing entries with priority values. Each contract is flattened into a listing of rules and a new priority value is calculated. The listing of rules encodes the implementation of the contract between the providers and the consumers. Each entry is iterated over and added to a listing of entries if it is not already present. For each rule, the one or more entries associated with the contract from which the rule was flattened are identified, and for each given entry a flat rule comprising the combination of the rule and the entry is generated, wherein a flattened priority is calculated based at least in part on the priority value of the given one of given entry and the priority value of the rule.
    Type: Application
    Filed: August 31, 2017
    Publication date: December 20, 2018
    Inventors: Advait Dixit, Ramana Rao Kompella, Kartik Mohanram, Sundar Iyer, Shadab Nazar, Chandra Nagarajan
  • Publication number: 20180365061
    Abstract: Aspects of the technology provide systems and methods for interleaving a processing task in a network monitoring appliance. A process of the technology could include steps for identifying operators in the network monitoring appliance, wherein the operators are sequentially arranged to form a processing pipeline, determining an epoch for the processing pipeline, wherein the epoch corresponds with a time duration required for a processing task to traverse the pipeline, and determining a time window in which a supplemental processing task can be interleaved into the processing pipeline, wherein the time window is based on the epoch. Machine-readable media are also provided.
    Type: Application
    Filed: October 27, 2017
    Publication date: December 20, 2018
    Inventors: Chetan Narsude, Gaurav Gupta, Azeem Suleman, Shadab Nazar, Pavan Mamillapalli, Sundar Iyer
  • Publication number: 20180367435
    Abstract: Aspects of the technology provide methods for simulating a failure in a tenant network. In some aspects, a monitoring appliance of the disclosed technology can be configured to carry out operations for receiving packets at a virtual device in the monitoring appliance, from a corresponding network device in the tenant network, and instantiating a firewall at the virtual device, wherein the firewall is configured to selectively block traffic routed from the network device to the virtual device in the monitoring appliance. The monitoring appliance can simulate failure of the network device by blocking traffic from the network device to the virtual device using the firewall, and analyze the tenant network to determine a predicted impact a failure of the network device would have on the tenant network. Systems and machine-readable media are also provided.
    Type: Application
    Filed: September 22, 2017
    Publication date: December 20, 2018
    Inventors: Shadab Nazar, Pavan Mamillapalli, Chetan Narsude, Gaurav Gupta, Azeem Suleman, Sravya Boggavarapu, Jose Delgado
  • Publication number: 20180367411
    Abstract: Aspects of the technology provide solutions for determining a time period (“epoch”) required to monitor or analyze a tenant network. Some implementations of the technology include a process for making automatic epoch determinations, which includes steps for identifying one or more network parameters for a tenant network, analyzing the tenant network using the network parameters to discover one or more configuration settings of the tenant network, and determining a first epoch for the tenant network, the first epoch corresponding with a period of time to complete analysis of the tenant network using the network parameters. In some aspects, the process can further include steps for generating a tenant profile for the tenant network, the tenant profile based on the network parameters, the first epoch, and the one or more configuration settings of the tenant network. Systems and machine-readable media are also provided.
    Type: Application
    Filed: October 24, 2017
    Publication date: December 20, 2018
    Inventors: Chetan Narsude, Gaurav Gupta, Shadab Nazar, Pavan Mamillapalli, Sundar Iyer
  • Publication number: 20180309629
    Abstract: Systems, methods, and computer-readable media for static network policy analysis for a network. In one example, a system obtains a logical model based on configuration data stored in a controller on a software-defined network, the logical model including a declarative representation of respective configurations of objects in the software-defined network, the objects including one or more endpoint groups, bridge domains, contexts, or tenants. The system defines rules representing respective conditions of the objects according to a specification corresponding to the software-defined network, and determines whether the respective configuration of each of the objects in the logical model violates one or more of the rules associated with that object. When the respective configuration of an object in the logical model violates one or more of the rules, the system detects an error in the respective configuration associated with that object.
    Type: Application
    Filed: July 28, 2017
    Publication date: October 25, 2018
    Inventors: Kartik Mohanram, Chandra Nagarajan, Sundar Iyer, Shadab Nazar, Ramana Rao Kompella
  • Patent number: 9466395
    Abstract: An ActiveTest solution for memory is disclosed which can search for memory errors during the operation of a product containing digital memory. The ActiveTest system tests memory banks that are not being accessed by normal memory users in order to continually test the memory system in the background. When there is a conflict between the ActiveTest system and a memory user, the memory user is generally given priority.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: October 11, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Sundar Iyer, Shadab Nazar, Sanjeev Joshi
  • Publication number: 20160005493
    Abstract: An ActiveTest solution for memory is disclosed which can search for memory errors during the operation of a product containing digital memory. The ActiveTest system tests memory banks that are not being accessed by normal memory users in order to continually test the memory system in the background. When there is a conflict between the ActiveTest system and a memory user, the memory user is generally given priority.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 7, 2016
    Inventors: Sundar Iyer, Shadab Nazar, Sanjeev Joshi
  • Patent number: 9165687
    Abstract: An ActiveTest solution for memory is disclosed which can search for memory errors during the operation of a product containing digital memory. The ActiveTest system tests memory banks that are not being accessed by normal memory users in order to continually test the memory system in the background. When there is a conflict between the ActiveTest system and a memory user, the memory user is generally given priority.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: October 20, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Sundar Iyer, Shadab Nazar, Sanjeev Joshi
  • Publication number: 20140344635
    Abstract: An ActiveTest solution for memory is disclosed which can search for memory errors during the operation of a product containing digital memory. The ActiveTest system tests memory banks that are not being accessed by normal memory users in order to continually test the memory system in the background. When there is a conflict between the ActiveTest system and a memory user, the memory user is generally given priority.
    Type: Application
    Filed: January 21, 2014
    Publication date: November 20, 2014
    Inventors: Sundar Iyer, Shadab Nazar, Sanjeev Joshi
  • Patent number: 8850137
    Abstract: A memory device and related techniques are provided to modify data stored in the memory device without the need to send the data to an external device. A command is received at the memory device to modify data stored at a memory location in a memory array of the memory device. The command includes a value to be used for modifying the data. The memory device reads data from the memory location. The data read from the memory location is modified with modify circuit in the memory device based on the value obtained form the command to produce results data. The results data produced by the modify circuit is written back to the memory location. Since the memory device does not need to send the data read from the memory array off-chip to another device, referred to herein as a host device, to update the data, the input/output bandwidth of the bandwidth is substantially reduced, allowing for lower power memory device operation and reduced latency.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: September 30, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Shadab Nazar, Mainak Sen, Wing L. Ho, Ananda Shah
  • Publication number: 20120089793
    Abstract: A memory device and related techniques are provided to modify data stored in the memory device without the need to send the data to an external device. A command is received at the memory device to modify data stored at a memory location in a memory array of the memory device. The command includes a value to be used for modifying the data. The memory device reads data from the memory location. The data read from the memory location is modified with modify circuit in the memory device based on the value obtained form the command to produce results data. The results data produced by the modify circuit is written back to the memory location. Since the memory device does not need to send the data read from the memory array off-chip to another device, referred to herein as a host device, to update the data, the input/output bandwidth of the bandwidth is substantially reduced, allowing for lower power memory device operation and reduced latency.
    Type: Application
    Filed: October 11, 2010
    Publication date: April 12, 2012
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Shadab Nazar, Mainak Sen, Wing L. Ho, Ananda Shah
  • Publication number: 20110289349
    Abstract: Monitoring and repairing memory includes selecting a first memory bank comprising a plurality of memory cells to analyze. The plurality of memory cells are copied from the first memory bank to a second memory bank, wherein a request to access the first memory bank is redirected to the second memory bank. A determination is made whether the first memory bank comprises an error of the memory cell.
    Type: Application
    Filed: May 24, 2010
    Publication date: November 24, 2011
    Applicant: Cisco Technology, Inc.
    Inventors: Matthias J. Loeser, Daniel V. Singletary, Sanjeev A. Joshi, Shadab Nazar