Patents by Inventor Georges Akis

Georges Akis 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: 10305819
    Abstract: A network switch includes a buffer to store network packets linked to queues to feed the packets to output ports of the switch associated with the queues. The buffer is shared dynamically among multiple traffic pools. The network switch determines per-pool dynamic thresholds each based on an amount of unused buffer space, and per-queue dynamic thresholds based on amounts of unused buffer space available in the pools with which the queues are associated. The network switch receives packets, and for each received packet, the network switch admits the packet to the pool with which the packet is associated and the queue for which the packet is destined if (i) occupancy of the associated pool is less than the corresponding per-pool dynamic threshold, and (ii) occupancy of the queue for which the packet is destined is less than the corresponding per-queue dynamic threshold, and otherwise drops the packet.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: May 28, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Mohammadreza Alizadeh Attar, Vinod Mitulal, Krishnan Subramani, Georges Akis, Peter Newman
  • Patent number: 9965211
    Abstract: Provided are a method, a non-transitory computer-readable storage device and an apparatus for managing use of a shared memory buffer that is partitioned into multiple banks and that stores incoming data received at multiple inputs in accordance with a multi-slice architecture. A particular bank is allocated to a corresponding slice. Received respective data packets are associated with corresponding slices based on which respective inputs they are received. Determine, based on a state of the shared memory buffer, to transfer contents of all occupied cells of the particular bank. Writes to the bank are stopped, contents of occupied cells are transferred to cells of one or more other banks associated with the particular bank's slice, information is stored indicating where the contents have been transferred, and the particular bank is returned to a shared pool after transferring is completed.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: May 8, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Sharad Vasantrao Chole, Shang-Tse Chuang, Georges Akis, Felice Bonardi, Rong Pan
  • Publication number: 20180067683
    Abstract: Provided are a method, a non-transitory computer-readable storage device and an apparatus for managing use of a shared memory buffer that is partitioned into multiple banks and that stores incoming data received at multiple inputs in accordance with a multi-slice architecture. A particular bank is allocated to a corresponding slice. Received respective data packets are associated with corresponding slices based on which respective inputs they are received. Determine, based on a state of the shared memory buffer, to transfer contents of all occupied cells of the particular bank. Writes to the bank are stopped, contents of occupied cells are transferred to cells of one or more other banks associated with the particular bank's slice, information is stored indicating where the contents have been transferred, and the particular bank is returned to a shared pool after transferring is completed.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 8, 2018
    Inventors: Sharad Vasantrao Chole, Shang-Tse Chuang, Georges Akis, Felice Bonardi, Rong Pan
  • Publication number: 20180063030
    Abstract: The subject technology relates to the management of a shared buffer memory in a network switch. Systems, methods, and machine readable media are provided for receiving a data packet at a first network queue from among a plurality of network queues, determining if a fill level of a queue in a shared buffer of the network switch exceeds a dynamic queue threshold, and in an event that the fill level of the shared buffer exceeds the dynamic queue threshold, determining if a fill level of the first network queue is less than a static queue minimum threshold.
    Type: Application
    Filed: August 29, 2016
    Publication date: March 1, 2018
    Inventors: Vinod Mitulal, Krishnan Subramani, Peter Newman, Georges Akis
  • Publication number: 20180034718
    Abstract: Systems, methods, and computer-readable storage media for monitoring queue occupancy in a network buffer, detecting microbursts, and analyzing the same.
    Type: Application
    Filed: July 28, 2016
    Publication date: February 1, 2018
    Inventors: Krishnan Subramani, Vinod Mitulal, Kinjal Shah, Georges Akis
  • Patent number: 9866401
    Abstract: A network switch includes a buffer to store network packets and packet descriptors (PDs) used to link the packets into queues for output ports. The buffer and PDs are shared among the multiple traffic pools. The switch receives a multicast packet for queues in a given pool. The switch determines if there is unused buffer space available for packets in the given pool based on a pool dynamic threshold, if there is unused buffer space available for packets in each queue based on a queue dynamic threshold for the queue, if there are unused PDs available to the given pool based on a pool dynamic threshold for PDs, and if there are unused PDs available for each queue based on a queue dynamic threshold for PDs for the queue. The network switch admits the packet only into the queues for which all of the determining operations pass.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: January 9, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Mohammadreza Alizadeh Attar, Sha Ma, Vinod Mitulal, Krishnan Subramani, Georges Akis, Peter Newman
  • Patent number: 9627063
    Abstract: A ternary content-addressable memory (TCAM) that is implemented based on other types of memory (e.g., SRAM) in conjunction with processing, including hashing functions. Such a H-TCAM may be used, for example, in implementation of routing equipment. A method of storing routing information on a network device, the routing information comprising a plurality of entries, each entry has a key value and a mask value, commences by identifying a plurality of groups, each group comprising a subset number of entries having a different common mask. The groups are identified by determining a subset number of entries that have a common mask value, meaning at least a portion of the mask value that is the same for all entries of the subset number of entries.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: April 18, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Sarang M. Dharmapurikar, Francisco M. Matus, Kit Chiu Chu, Georges Akis, Thomas J. Edsall
  • Publication number: 20160337142
    Abstract: A network switch includes a buffer to store network packets and packet descriptors (PDs) used to link the packets into queues for output ports. The buffer and PDs are shared among the multiple traffic pools. The switch receives a multicast packet for queues in a given pool. The switch determines if there is unused buffer space available for packets in the given pool based on a pool dynamic threshold, if there is unused buffer space available for packets in each queue based on a queue dynamic threshold for the queue, if there are unused PDs available to the given pool based on a pool dynamic threshold for PDs, and if there are unused PDs available for each queue based on a queue dynamic threshold for PDs for the queue. The network switch admits the packet only into the queues for which all of the determining operations pass.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 17, 2016
    Inventors: Mohammadreza Alizadeh Attar, Sha Ma, Vinod Mitulal, Krishnan Subramani, Georges Akis, Peter Newman
  • Publication number: 20160337258
    Abstract: A network switch includes a buffer to store network packets linked to queues to feed the packets to output ports of the switch associated with the queues. The buffer is shared dynamically among multiple traffic pools. The network switch determines per-pool dynamic thresholds each based on an amount of unused buffer space, and per-queue dynamic thresholds based on amounts of unused buffer space available in the pools with which the queues are associated. The network switch receives packets, and for each received packet, the network switch admits the packet to the pool with which the packet is associated and the queue for which the packet is destined if (i) occupancy of the associated pool is less than the corresponding per-pool dynamic threshold, and (ii) occupancy of the queue for which the packet is destined is less than the corresponding per-queue dynamic threshold, and otherwise drops the packet.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 17, 2016
    Inventors: Mohammadreza Alizadeh Attar, Vinod Mitulal, Krishnan Subramani, Georges Akis, Peter Newman
  • Patent number: 9106574
    Abstract: An example method, system, and switching element are provided and may provide for an egress port to be configured to receive a plurality of data packets, each of the plurality of data packets being a class of a plurality of classes. A buffer may communicate with the at least one data port interface. A memory management unit may be configured to enable and disable transmission of the plurality of classes of the plurality of data packets based on a metering policy; and place the plurality of data packets in the buffer.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: August 11, 2015
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Peter Newman, Francis Matus, Georges Akis, Ganlin Wu
  • Patent number: 9100313
    Abstract: A multi-stage network switch comprises a plurality of ingress port subsystems each comprising one or more ingress ports configured to receive packets. The switch also comprises a plurality of unscheduled crossbar switching elements connected to the ingress port subsystems that are configured to receive one or more packets from at least one of the ingress port subsystems. The switch further comprises a plurality of egress port subsystems each comprising a memory and a plurality of egress ports. The memory comprises at least one shared egress buffer configured to receive any packets forwarded by the crossbar switching elements from the ingress port subsystems directed to the egress port subsystem, and the egress ports are configured to transmit the packets received in the shared egress buffer.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 4, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Mario Mazzola, Luca Cafiero, Francis Matus, Georges Akis, Peter Newman
  • Publication number: 20150127900
    Abstract: A ternary content-addressable memory (TCAM) that is implemented based on other types of memory (e.g., SRAM) in conjunction with processing, including hashing functions. Such a H-TCAM may be used, for example, in implementation of routing equipment. A method of storing routing information on a network device, the routing information comprising a plurality of entries, each entry has a key value and a mask value, commences by identifying a plurality of groups, each group comprising a subset number of entries having a different common mask. The groups are identified by determining a subset number of entries that have a common mask value, meaning at least a portion of the mask value that is the same for all entries of the subset number of entries.
    Type: Application
    Filed: September 18, 2014
    Publication date: May 7, 2015
    Inventors: Sarang M. Dharmapurikar, Francisco M. Matus, Kit Chiu Chu, Georges Akis, Thomas J. Edsall
  • Publication number: 20140185442
    Abstract: An example method, system, and switching element are provided and may provide for an egress port to be configured to receive a plurality of data packets, each of the plurality of data packets being a class of a plurality of classes. A buffer may communicate with the at least one data port interface. A memory management unit may be configured to enable and disable transmission of the plurality of classes of the plurality of data packets based on a metering policy; and place the plurality of data packets in the buffer.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 3, 2014
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Peter Newman, Francis Matus, George Akis, Ganlin Wu