Patents by Inventor Vahab Akbarzadeh
Vahab Akbarzadeh 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: 11962485Abstract: Techniques for operating a network device for sharing resources in a hardware forwarding table. In some embodiments, the network device may generate groups of routes having a common set of next hops; for each group of routes of the generated groups: collect resilient adjacencies associated with routes in the group; assemble pairs of the collected resilient adjacencies; and determine a number of differences between resilient adjacencies in each of the assembled pairs. The network device may further order the assembled pairs based on the number of differences, identify a pair of resilient adjacencies associated with a lowest number of differences; select a resilient adjacency of the identified pair of resilient adjacencies; program one or more routes associated with the selected resilient adjacency, to refer to the other resilient adjacency of the identified pair of resilient adjacencies; and remove an entry associated with the selected resilient adjacency from a forwarding table.Type: GrantFiled: January 25, 2023Date of Patent: April 16, 2024Assignee: ARISTA NETWORKS, INC.Inventors: Emil Maric, Mayukh Saubhasik, Vahab Akbarzadeh, Trevor Siemens
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Publication number: 20240031271Abstract: A method of operating a network device is provided. The method may include updating a software forwarding table in response to a link between the network device and one or more next hops device being disconnected or connected. The software forwarding table may list next hop devices currently available or connected to the network device for a given destination prefix. The method may include determining whether to update a hardware forwarding table also associated with the given destination prefix depending on whether one or more criteria have been satisfied. The hardware forwarding table may be updated in accordance with a resilient mode or an ordered mode. The resilient mode takes into account history information associated with the hardware forwarding table, whereas the ordered mode does not take into account the history information associated with the hardware forwarding table.Type: ApplicationFiled: July 22, 2022Publication date: January 25, 2024Inventors: Mayukh Saubhasik, Nam Anh Tran, Vahab Akbarzadeh
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Publication number: 20230396546Abstract: Techniques for operating a network device for increasing the logical multi-path size of a hardware forwarding table are provided. In some embodiments, the network device may determine that a number of data points in a first node is greater than a maximum node capacity; generate second nodes; update the first node to refer to the second nodes; distribute the data points among the second nodes; and program a hardware table with the updated first node and the second nodes.Type: ApplicationFiled: August 21, 2023Publication date: December 7, 2023Inventors: Trevor Siemens, Mayukh Saubhasik, Vahab Akbarzadeh
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Patent number: 11770338Abstract: Techniques for operating a network device for increasing the logical multi-path size of a hardware forwarding table are provided. In some embodiments, the network device may determine that a number of data points in a first node is greater than a maximum node capacity; generate second nodes; update the first node to refer to the second nodes; distribute the data points among the second nodes; and program a hardware table with the updated first node and the second nodes.Type: GrantFiled: August 24, 2021Date of Patent: September 26, 2023Assignee: ARISTA NETWORKS, INC.Inventors: Trevor Siemens, Mayukh Saubhasik, Vahab Akbarzadeh
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Publication number: 20230246940Abstract: Techniques for operating a network device for sharing resources in a hardware forwarding table. In some embodiments, the network device may generate groups of routes having a common set of next hops; for each group of routes of the generated groups: collect resilient adjacencies associated with routes in the group; assemble pairs of the collected resilient adjacencies; and determine a number of differences between resilient adjacencies in each of the assembled pairs. The network device may further order the assembled pairs based on the number of differences, identify a pair of resilient adjacencies associated with a lowest number of differences; select a resilient adjacency of the identified pair of resilient adjacencies; program one or more routes associated with the selected resilient adjacency, to refer to the other resilient adjacency of the identified pair of resilient adjacencies; and remove an entry associated with the selected resilient adjacency from a forwarding table.Type: ApplicationFiled: January 25, 2023Publication date: August 3, 2023Inventors: Emil Maric, Mayukh Saubhasik, Vahab Akbarzadeh, Trevor Siemens
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Patent number: 11570083Abstract: Techniques for operating a network device for sharing resources in a hardware forwarding table. In some embodiments, the network device may generate groups of routes having a common set of next hops; for each group of routes of the generated groups: collect resilient adjacencies associated with routes in the group; assemble pairs of the collected resilient adjacencies; and determine a number of differences between resilient adjacencies in each of the assembled pairs. The network device may further order the assembled pairs based on the number of differences, identify a pair of resilient adjacencies associated with a lowest number of differences; select a resilient adjacency of the identified pair of resilient adjacencies; program one or more routes associated with the selected resilient adjacency, to refer to the other resilient adjacency of the identified pair of resilient adjacencies; and remove an entry associated with the selected resilient adjacency from a forwarding table.Type: GrantFiled: July 29, 2021Date of Patent: January 31, 2023Assignee: ARISTA NETWORKS, INC.Inventors: Emil Maric, Mayukh Saubhasik, Vahab Akbarzadeh, Trevor Siemens
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Patent number: 11405311Abstract: Recovering and reconciling hierarchical forwarding equivalence class information includes storing routing information in a forwarding information base (FIB) corresponding to a first hierarchy of nodes; storing routing information in a routing table separate from the FIB corresponding to a second hierarchy of nodes; and comparing routing information stored for a candidate node in the first hierarchy of nodes with routing information stored for a first plurality of nodes in the second hierarchy of nodes having a height that is the same as a height of the candidate node. Routing information corresponding to the routing information stored for the candidate node is removed from the FIB when the routing information stored for the candidate node does not match any of the routing information stored among the first plurality of nodes.Type: GrantFiled: July 6, 2020Date of Patent: August 2, 2022Assignee: Arista Networks, Inc.Inventors: Trevor Siemens, Mayukh Saubhasik, Vahab Akbarzadeh
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Publication number: 20220239582Abstract: Techniques for operating a network device for sharing resources in a hardware forwarding table. In some embodiments, the network device may generate groups of routes having a common set of next hops; for each group of routes of the generated groups: collect resilient adjacencies associated with routes in the group; assemble pairs of the collected resilient adjacencies; and determine a number of differences between resilient adjacencies in each of the assembled pairs. The network device may further order the assembled pairs based on the number of differences, identify a pair of resilient adjacencies associated with a lowest number of differences; select a resilient adjacency of the identified pair of resilient adjacencies; program one or more routes associated with the selected resilient adjacency, to refer to the other resilient adjacency of the identified pair of resilient adjacencies; and remove an entry associated with the selected resilient adjacency from a forwarding table.Type: ApplicationFiled: July 29, 2021Publication date: July 28, 2022Inventors: Emil Maric, Mayukh Saubhasik, Vahab Akbarzadeh, Trevor Siemens
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Publication number: 20220239595Abstract: Techniques for operating a network device for increasing the logical multi-path size of a hardware forwarding table are provided. In some embodiments, the network device may determine that a number of data points in a first node is greater than a maximum node capacity; generate second nodes; update the first node to refer to the second nodes; distribute the data points among the second nodes; and program a hardware table with the updated first node and the second nodes.Type: ApplicationFiled: August 24, 2021Publication date: July 28, 2022Inventors: Trevor Siemens, Mayukh Saubhasik, Vahab Akbarzadeh
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Publication number: 20220006732Abstract: Recovering and reconciling hierarchical forwarding equivalence class information includes storing routing information in a forwarding information base (FIB) corresponding to a first hierarchy of nodes; storing routing information in a routing table separate from the FIB corresponding to a second hierarchy of nodes; and comparing routing information stored for a candidate node in the first hierarchy of nodes with routing information stored for a first plurality of nodes in the second hierarchy of nodes having a height that is the same as a height of the candidate node. Routing information corresponding to the routing information stored for the candidate node is removed from the FIB when the routing information stored for the candidate node does not match any of the routing information stored among the first plurality of nodes.Type: ApplicationFiled: July 6, 2020Publication date: January 6, 2022Inventors: Trevor Siemens, Mayukh Saubhasik, Vahab Akbarzadeh
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Patent number: 10965583Abstract: Embodiments disclosed herein relate to methods and computer-readable mediums for preserving forwarding equivalence class (FEC) hierarchy weights, which may include obtaining a FEC hierarchy; obtaining a target height for the FEC hierarchy; identifying within the FEC hierarchy a FEC node comprising pointers to a plurality of lower level FEC nodes; making a first determination that a height of the FEC node is greater than the target height; obtaining a rebasing factor for the FEC node; and updating weights for the plurality of lower level FEC nodes using the rebasing factor to obtain an updated FEC hierarchy.Type: GrantFiled: October 1, 2020Date of Patent: March 30, 2021Assignee: Arista Networks, Inc.Inventors: Mayukh Saubhasik, Vahab Akbarzadeh
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Publication number: 20210021508Abstract: Embodiments disclosed herein relate to methods and computer-readable mediums for preserving forwarding equivalence class (FEC) hierarchy weights, which may include obtaining a FEC hierarchy; obtaining a target height for the FEC hierarchy; identifying within the FEC hierarchy a FEC node comprising pointers to a plurality of lower level FEC nodes; making a first determination that a height of the FEC node is greater than the target height; obtaining a rebasing factor for the FEC node; and updating weights for the plurality of lower level FEC nodes using the rebasing factor to obtain an updated FEC hierarchy.Type: ApplicationFiled: October 1, 2020Publication date: January 21, 2021Inventors: Mayukh Saubhasik, Vahab Akbarzadeh
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Publication number: 20200366591Abstract: Embodiments disclosed herein relate to methods and computer-readable mediums for preserving forwarding equivalence class (FEC) hierarchy weights, which may include obtaining a FEC hierarchy; obtaining a target height for the FEC hierarchy; identifying within the FEC hierarchy a FEC node comprising pointers to a plurality of lower level FEC nodes; making a first determination that a height of the FEC node is greater than the target height; obtaining a rebasing factor for the FEC node; and updating weights for the plurality of lower level FEC nodes using the rebasing factor to obtain an updated FEC hierarchy.Type: ApplicationFiled: May 17, 2019Publication date: November 19, 2020Inventors: Mayukh Saubhasik, Vahab Akbarzadeh
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Patent number: 10841197Abstract: Embodiments disclosed herein relate to methods and computer-readable mediums for preserving forwarding equivalence class (FEC) hierarchy weights, which may include obtaining a FEC hierarchy; obtaining a target height for the FEC hierarchy; identifying within the FEC hierarchy a FEC node comprising pointers to a plurality of lower level FEC nodes; making a first determination that a height of the FEC node is greater than the target height; obtaining a rebasing factor for the FEC node; and updating weights for the plurality of lower level FEC nodes using the rebasing factor to obtain an updated FEC hierarchy.Type: GrantFiled: May 17, 2019Date of Patent: November 17, 2020Assignee: Arista Networks, Inc.Inventors: Mayukh Saubhasik, Vahab Akbarzadeh