公开(公告)号：US20190342193A1

公开(公告)日：2019-11-07

申请号：US16514407

申请日：2019-07-17

申请人： Cisco Technology, Inc.

发明人： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

IPC分类号： H04L12/26

摘要： 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.

公开(公告)号：US11563695B2

公开(公告)日：2023-01-24

申请号：US15250860

申请日：2016-08-29

申请人： Cisco Technology, Inc.

发明人： Vinod Mitulal ,  Krishnan Subramani ,  Peter Newman ,  Georges Akis

IPC分类号： H04L49/103 ,  H04L49/00 ,  H04L49/104 ,  H04L47/10 ,  H04L47/32 ,  H04L47/30 ,  H04L49/9005 ,  H04L49/90

摘要： 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.

公开(公告)号：US11196648B2

公开(公告)日：2021-12-07

申请号：US16514407

申请日：2019-07-17

申请人： Cisco Technology, Inc.

发明人： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

IPC分类号： H04L12/26 ,  H04L29/08 ,  H04L12/863 ,  H04L12/835 ,  H04L12/861 ,  H04L12/24

摘要： 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.

公开(公告)号：US20190222528A1

公开(公告)日：2019-07-18

申请号：US15874491

申请日：2018-01-18

申请人： Cisco Technology, Inc.

发明人： Rong Pan ,  Parvin Taheri ,  Liyuan Quan ,  Sha Ma ,  Krishnan Subramani

IPC分类号： H04L12/835 ,  H04L12/825 ,  H04L12/861

摘要： A network device is configured to transmit acknowledgement packets according to the length of the egress queue. The network device receives data packets from one or more endpoints and buffers the data packets in an egress buffer before transmitting the data packets. The network device also receives acknowledgement packets that are sent in response to data packets previously transmitted by the network device. The network device buffers the acknowledgement packets in an acknowledgement buffer. The network device transmits the acknowledgement packets at an acknowledgment rate that is based on a queue length of the egress buffer.

公开(公告)号：US20230412523A1

公开(公告)日：2023-12-21

申请号：US18460264

申请日：2023-09-01

申请人： Cisco Technology, Inc.

发明人： Vinod Mitulal ,  Krishnan Subramani ,  Peter Newman ,  Georges Akis

IPC分类号： H04L49/103 ,  H04L49/00 ,  H04L49/104 ,  H04L47/10 ,  H04L47/32 ,  H04L47/30 ,  H04L49/9005 ,  H04L49/90

CPC分类号： H04L49/103 ,  H04L49/3036 ,  H04L49/108 ,  H04L47/29 ,  H04L47/32 ,  H04L47/30 ,  H04L49/9005 ,  H04L49/9084

摘要： 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.

公开(公告)号：US10374912B2

公开(公告)日：2019-08-06

申请号：US15222839

申请日：2016-07-28

申请人： CISCO TECHNOLOGY, INC.

发明人： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

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

摘要： 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.

公开(公告)号：US20180034718A1

公开(公告)日：2018-02-01

申请号：US15222839

申请日：2016-07-28

申请人： CISCO TECHNOLOGY, INC.

发明人： Krishnan Subramani ,  Vinod Mitulal ,  Kinjal Shah ,  Georges Akis

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

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

摘要： 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.

公开(公告)号：US10439952B1

公开(公告)日：2019-10-08

申请号：US15204314

申请日：2016-07-07

申请人： Cisco Technology, Inc.

发明人： Vinod Mitulal ,  Krishnan Subramani ,  Peter Newman ,  Georges Akis

IPC分类号： H04L12/863 ,  H04L12/801 ,  H04L12/835

摘要： A network device receives a packet at a port from among a number of ports. A queue threshold is randomly adjusted for a queue having an output buffer to which the packet is stored. When a fullness of the queue exceeds the adjusted queue threshold, at a time when the packet is to be enqueued into the queue, an action is performed. The action includes either dropping the received packet, or flow-controlling the port at which the packet is received.

公开(公告)号：US10305819B2

公开(公告)日：2019-05-28

申请号：US14710822

申请日：2015-05-13

申请人： Cisco Technology, Inc.

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

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

摘要： 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.

公开(公告)号：US20160337142A1

公开(公告)日：2016-11-17

申请号：US14710974

申请日：2015-05-13

申请人： Cisco Technology, Inc.

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

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

CPC分类号： H04L12/1881 ,  H04L47/6255 ,  H04L47/6275 ,  H04L49/901 ,  H04L49/9047

摘要： 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.

摘要翻译： 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。