Patents by Inventor David Alexander Ball
David Alexander Ball 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).
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Patent number: 10812367Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: GrantFiled: September 10, 2018Date of Patent: October 20, 2020Assignee: CISCO TECHNOLOGY, INC.Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 10616091Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: GrantFiled: September 10, 2018Date of Patent: April 7, 2020Assignee: CISCO TECHNOLOGY, INC.Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Publication number: 20190028380Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: ApplicationFiled: September 10, 2018Publication date: January 24, 2019Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Publication number: 20190028379Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: ApplicationFiled: September 10, 2018Publication date: January 24, 2019Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 10084684Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: GrantFiled: July 19, 2017Date of Patent: September 25, 2018Assignee: CISCO TECHNOLOGY, INC.Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 10075370Abstract: In one embodiment, a network device is configured to generate a control protocol packet containing a source address of the network device and a destination address. The network device is configured to translate the source address to a interface device address of a first communication interface device included in the network device. The control protocol packet can be transmitted over the network by a second communication interface device included in the network device for receipt by a device based on the destination address.Type: GrantFiled: December 22, 2016Date of Patent: September 11, 2018Assignee: Cisco Technology, Inc.Inventors: Anand Brahmanad Agarwal, Vinay Narayana Rai, David Alexander Ball, Balaji Thulasinathan, Rajeeva Kowshika Ramesh
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Publication number: 20170317917Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: ApplicationFiled: July 19, 2017Publication date: November 2, 2017Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 9742655Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: GrantFiled: June 30, 2014Date of Patent: August 22, 2017Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Publication number: 20170104677Abstract: In one embodiment, a network device is configured to generate a control protocol packet containing a source address of the network device and a destination address. The network device is configured to translate the source address to a interface device address of a first communication interface device included in the network device. The control protocol packet can be transmitted over the network by a second communication interface device included in the network device for receipt by a device based on the destination address.Type: ApplicationFiled: December 22, 2016Publication date: April 13, 2017Inventors: Anand Brahmanad Agarwal, Vinay Narayana Rai, David Alexander Ball, Balaji Thulasinathan, Rajeeva Kowshika Ramesh
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Patent number: 9558057Abstract: In one embodiment, a network device is configured to generate a control protocol packet containing a source address of the network device and a destination address. The network device is configured to translate the source address to a interface device address of a first communication interface device included in the network device. The control protocol packet can be transmitted over the network by a second communication interface device included in the network device for receipt by a device based on the destination address.Type: GrantFiled: September 24, 2014Date of Patent: January 31, 2017Assignee: Cisco Technology, Inc.Inventors: Anand Brahmanad Agarwal, Vinay Narayana Rai, David Alexander Ball, Balaji Thulasinathan, Rajeeva Kowshika Ramesh
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Publication number: 20150200827Abstract: In one embodiment, a network device is configured to generate a control protocol packet containing a source address of the network device and a destination address. The network device is configured to translate the source address to a interface device address of a first communication interface device included in the network device. The control protocol packet can be transmitted over the network by a second communication interface device included in the network device for receipt by a device based on the destination address.Type: ApplicationFiled: September 24, 2014Publication date: July 16, 2015Inventors: Anand Brahmanad Agarwal, Vinay Narayana Rai, David Alexander Ball, Balaji Thulasinathan, Rajeeva Kowshika Ramesh
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Publication number: 20140313940Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: ApplicationFiled: June 30, 2014Publication date: October 23, 2014Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 8767587Abstract: In one embodiment, an exploratory linktrace is initiated from an initiating network device with an exploratory linktrace message (ELM) having a target address. Each network device receiving the ELM may then propagate the ELM on a plurality of its ports to a plurality of downstream network devices based on the target address. In addition, each receiving network device returns an exploratory linktrace reply (ELR) for each of the plurality of ports, where each ELR is returned according to one or more mechanisms to mitigate stormed replies to the initiating network device.Type: GrantFiled: January 21, 2009Date of Patent: July 1, 2014Assignee: Cisco Technology, Inc.Inventors: Norman W. Finn, Samer Salam, John Monaghan, Iain McDade, David Alexander Ball, Simon Chatterjee
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Patent number: 7359393Abstract: A method and apparatus for establishing update groups of peers having matching outbound policies are disclosed. When a change in the outbound policy of a peer is identified, the update group membership of the peer is resolved.Type: GrantFiled: August 11, 2003Date of Patent: April 15, 2008Assignee: Cisco Technology, Inc.Inventors: Gargi Nalawade, David Alexander Ball
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Patent number: 7023808Abstract: A partial best path technique distributes route selection in a routing protocol implementation on a router. The technique also ensures that announced paths received from peers of the router (i.e., a “load”) are compared in a correct order to select best paths that are then used by the router to forward packets and to advertise to the peers. When employed in a distributed architecture, the technique further reduces memory usage. To that end, the partial best path technique enhances a best path selection algorithm executed by the router to enable dispersion of the received path load among processing nodes or elements of the router, while maintaining the ordering requirement of the algorithm. The partial best path technique essentially provides an enhancement to the best path selection algorithm that selects a subset of paths from a plurality of paths, with that subset being the minimal subset needed to select the best paths.Type: GrantFiled: December 23, 2003Date of Patent: April 4, 2006Assignee: Cisco Technology, Inc.Inventors: David Alexander Ball, R. Eric Bennett, Martin Hesketh, John Galen Scudder, David D. Ward