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    DETECTING AND MEASURING MICROBURSTS IN A NETWORKING DEVICE
    1.
    发明申请
    DETECTING AND MEASURING MICROBURSTS IN A NETWORKING DEVICE 审中-公开

    公开(公告)号：US20190342193A1

    公开(公告)日：2019-11-07

    申请号：US16514407

    申请日：2019-07-17

    Applicant: Cisco Technology, Inc.

    Inventor： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

    IPC: H04L12/26

    Abstract: Systems, methods, and computer-readable storage media for monitoring queue occupancy in a network buffer, detecting microbursts, and analyzing the same. An ASIC device can monitor a queue occupancy value of a network buffer, detect when the queue occupancy value exceeds a first predetermined threshold queue occupancy, create a record with a time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, a queue occupancy value at the time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, detect when the queue occupancy value falls below a second predetermined threshold queue occupancy, and determine a maximum queue occupancy value between the time that the queue occupancy value exceeded the first predetermined threshold queue occupancy and a time that the queue occupancy value falls below the second predetermined threshold queue occupancy, and add to the record the maximum queue occupancy value, a time of the maximum queue occupancy value, the time that the queue that the queue occupancy value falls below the second predetermined threshold queue occupancy and the queue occupancy value at the time that the queue occupancy value falls below the second predetermined threshold queue occupancy.

    DYNAMIC PACKET BUFFERS WITH CONSOLIDATION OF LOW UTILIZED MEMORY BANKS
    3.
    发明申请
    DYNAMIC PACKET BUFFERS WITH CONSOLIDATION OF LOW UTILIZED MEMORY BANKS 有权

    公开(公告)号：US20180067683A1

    公开(公告)日：2018-03-08

    申请号：US15259602

    申请日：2016-09-08

    Applicant: Cisco Technology, Inc.

    Inventor： Sharad Vasantrao Chole ,  Shang-Tse Chuang ,  Georges Akis ,  Felice Bonardi ,  Rong Pan

    IPC: G06F3/06

    CPC classification number: H04L47/00 ,  G06F12/0623 ,  G06F12/0692 ,  G06F12/1045 ,  G06F12/127

    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.

    Dynamic protection of shared memory used by output queues in a network device
    5.
    发明授权
    Dynamic protection of shared memory used by output queues in a network device 有权

    公开(公告)号：US10305819B2

    公开(公告)日：2019-05-28

    申请号：US14710822

    申请日：2015-05-13

    Applicant: Cisco Technology, Inc.

    Inventor： Mohammadreza Alizadeh Attar ,  Vinod Mitulal ,  Krishnan Subramani ,  Georges Akis ,  Peter Newman

    IPC: H04L12/823 ,  H04L12/863 ,  H04L12/925 ,  H04L12/933 ,  H04L12/935 ,  H04L12/931

    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.

    Dynamic Protection Of Shared Memory And Packet Descriptors Used By Output Queues In A Network Device
    6.
    发明申请
    Dynamic Protection Of Shared Memory And Packet Descriptors Used By Output Queues In A Network Device 有权
    网络设备中输出队列使用的共享内存和数据包描述符的动态保护

    公开(公告)号：US20160337142A1

    公开(公告)日：2016-11-17

    申请号：US14710974

    申请日：2015-05-13

    Applicant: Cisco Technology, Inc.

    Inventor： Mohammadreza Alizadeh Attar ,  Sha Ma ,  Vinod Mitulal ,  Krishnan Subramani ,  Georges Akis ,  Peter Newman

    IPC: H04L12/18 ,  H04L12/861 ,  H04L12/865 ,  H04L12/863

    CPC classification number: H04L12/1881 ,  H04L47/6255 ,  H04L47/6275 ,  H04L49/901 ,  H04L49/9047

    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.

    Abstract translation: 网络交换机包括用于存储用于将分组链接到用于输出端口的队列的网络分组和分组描述符（PD）的缓冲器。 缓冲区和PD在多个流量池之间共享。 交换机接收给定池中队列的组播数据包。 如果存在未使用的PD，则根据队列的动态阈值，如果每个队列中的数据包有可用的未使用的缓冲区空间，交换机将根据池动态阈值确定是否存在可用于给定池中的数据包的未使用的缓冲区空间 基于PD的池动态阈值对给定池可用，以及基于队列的队列动态阈值的队列动态阈值是否存在可用于每个队列的未使用的PD。 网络交换机仅将数据包仅允许到所有确定操作通过的队列中。

    Detecting and measuring microbursts in a networking device
    8.
    发明授权
    Detecting and measuring microbursts in a networking device 有权

    公开(公告)号：US10374912B2

    公开(公告)日：2019-08-06

    申请号：US15222839

    申请日：2016-07-28

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

    IPC: H04L12/26 ,  H04L29/08 ,  H04L12/863 ,  H04L12/861 ,  H04L12/24

    Abstract: Systems, methods, and computer-readable storage media for monitoring queue occupancy in a network buffer, detecting microbursts, and analyzing the same. An ASIC device can monitor a queue occupancy value of a network buffer, detect when the queue occupancy value exceeds a first predetermined threshold queue occupancy, create a record with a time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, a queue occupancy value at the time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, detect when the queue occupancy value falls below a second predetermined threshold queue occupancy, and determine a maximum queue occupancy value between the time that the queue occupancy value exceeded the first predetermined threshold queue occupancy and a time that the queue occupancy value falls below the second predetermined threshold queue occupancy, and add to the record the maximum queue occupancy value, a time of the maximum queue occupancy value, the time that the queue that the queue occupancy value falls below the second predetermined threshold queue occupancy and the queue occupancy value at the time that the queue occupancy value falls below the second predetermined threshold queue occupancy.

    DETECTING AND MEASURING MICROBURSTS IN A NETWORKING DEVICE
    9.
    发明申请
    DETECTING AND MEASURING MICROBURSTS IN A NETWORKING DEVICE 审中-公开

    公开(公告)号：US20180034718A1

    公开(公告)日：2018-02-01

    申请号：US15222839

    申请日：2016-07-28

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

    IPC: H04L12/26 ,  H04L29/08 ,  H04L12/863

    CPC classification number: H04L43/04 ,  H04L41/5096 ,  H04L43/067 ,  H04L43/0817 ,  H04L43/16 ,  H04L47/30 ,  H04L47/62 ,  H04L49/90

    Abstract: Systems, methods, and computer-readable storage media for monitoring queue occupancy in a network buffer, detecting microbursts, and analyzing the same. An ASIC device can monitor a queue occupancy value of a network buffer, detect when the queue occupancy value exceeds a first predetermined threshold queue occupancy, create a record with a time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, a queue occupancy value at the time that the queue occupancy value exceeds the first predetermined threshold queue occupancy, detect when the queue occupancy value falls below a second predetermined threshold queue occupancy, and determine a maximum queue occupancy value between the time that the queue occupancy value exceeded the first predetermined threshold queue occupancy and a time that the queue occupancy value falls below the second predetermined threshold queue occupancy, and add to the record the maximum queue occupancy value, a time of the maximum queue occupancy value, the time that the queue that the queue occupancy value falls below the second predetermined threshold queue occupancy and the queue occupancy value at the time that the queue occupancy value falls below the second predetermined threshold queue occupancy.

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