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1. 发明授权

US11005769B2 Congestion avoidance in a network device 有权
公开(公告)号：US11005769B2
公开(公告)日：2021-05-11
申请号：US16725518
申请日：2019-12-23
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Ilan Mayer-Wolf , Zvi Shmilovici Leib , Carmi Arad
IPC分类号： H04L12/801 , H04L12/823 , H04L12/835 , H04L12/861 , H04L12/851
摘要： A packet processor of a network device determines an amount of free buffer space in a buffer memory currently available for buffering packets, and dynamically determines a value of a threshold for triggering a particular traffic management operation with respect to a packet, to dynamically adjust the value of the threshold based at least in part on a changing amount of free buffer space available for buffering packets in the buffer memory. The packet processor determines, based on a comparison between i) a current fill level of a particular transmit queue in which the packet is to be enqueued and ii) the dynamically adjusted value of the threshold, whether the particular traffic management operation is to be triggered with respect to the packet. When the particular traffic management operation is to be triggered, the packet processor performs the particular traffic management operation with respect to the packet.

2. 发明授权

US10904150B1 Distributed dynamic load balancing in network systems 有权
公开(公告)号：US10904150B1
公开(公告)日：2021-01-26
申请号：US15423389
申请日：2017-02-02
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Dor Joseph Kampeas , Carmi Arad , Rami Zemach , David Melman , Ronen Tausi
IPC分类号： H04L12/803 , H04L12/707 , H04L12/721
摘要： A source switching device in a switching system receives information measured by a target switching device in the switching system. The information is indicative of an amount of data received in a given amount of time by the target switching device via each of two or more first links coupled to the target switching device. The source switching device determines, based at least in part on the information received from the target device, a path, from among multiple paths from the source switching device to the target switching device, for transmission of a packet flow directed to the target switching device. The source switching device transmits, via the determined path for transmission of the packet flow to the target device, one or more packets belonging to the packet flow.

3. 发明授权

US10541947B2 Egress flow mirroring in a network device 有权
公开(公告)号：US10541947B2
公开(公告)日：2020-01-21
申请号：US15599199
申请日：2017-05-18
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： David Melman , Ilan Mayer-Wolf , Carmi Arad , Rami Zemach
IPC分类号： H04J1/16 , H04L12/861 , H04L12/851 , H04L12/823 , H04L29/06
摘要： A packet is received at a network device. The packet is processed by the network device to determine at least one egress port via which to transmit the packet, and to perform egress classification of the packet based at least in part on information determined for the packet during processing of the packet. Egress classification includes determining whether the packet should not be transmitted by the network device. When it is not determined that the packet should not be transmitted by the network device, a copy of the packet is generated for mirroring of the packet to a destination other than the determined at least one egress port, and the packet is enqueued in an egress queue corresponding to the determined at least one egress port. The packet is subsequently transferred to the determined at least one egress port for transmission of the packet.

4. 发明授权

US10243857B1 Method and apparatus for multipath group updates 有权
公开(公告)号：US10243857B1
公开(公告)日：2019-03-26
申请号：US15701151
申请日：2017-09-11
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Tal Mizrahi , Carmi Arad
IPC分类号： H04L12/803 , H04L12/707 , H04L29/06 , H04L12/743 , H04L12/721
摘要： A method for updating multipath groups of a network device is described. A first table defining a first multipath group of multiple egress interfaces is created. A change in network path availability at one or more egress interface members of the first multipath group is identified. The first multipath group includes at least some egress interfaces that remain available and that support at least some active packet sessions. A second table defining a second multipath group is created and coexists with the first multipath group. The second multipath group includes the remaining network paths that remain available. The first multipath group and the first table are selected for forwarding a packet from the active packet sessions. The second multipath group and the second table are selected for forwarding a packet from new packet sessions that are established after the change in the path availability.

5. 发明授权

US10177997B1 Method and apparatus for packet and byte counting 有权
公开(公告)号：US10177997B1
公开(公告)日：2019-01-08
申请号：US14933466
申请日：2015-11-05
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Dror Bromberg , Carmi Arad
IPC分类号： H04L12/28 , H04L12/26 , H04L12/24
摘要： A network device and a method for maintaining a count of network events in a network device are provided. A first memory is configured as a first counter, where the first counter is configured to store a least significant bit (LSb) portion of a count value. A second memory is configured as a second counter, where the second counter is configured to store a most significant bit (MSb) portion of the count value. Update circuitry is configured to (i) selectively increment or decrement the LSb portion of the count value stored in the first memory upon occurrence of an event, and (ii) selectively increment or decrement the MSb portion of the count value stored in the second memory upon occurrence of a wrap-around event in the first memory.

6. 发明申请

US20150256466A1 DISTRIBUTED COUNTERS AND METERS IN PACKET-SWITCHED SYSTEM 有权
标题翻译：分组交换系统中的分布式计数器和计量器
公开(公告)号：US20150256466A1
公开(公告)日：2015-09-10
申请号：US14638753
申请日：2015-03-04
申请人： MARVELL ISRAEL (M.I.S.L) LTD.
发明人： Amir ROITSHTEIN , Carmi Arad , Gil Levy , Rami Zemach
IPC分类号： H04L12/851 , H04L12/815
CPC分类号： H04L47/2483 , H04L41/082 , H04L43/02 , H04L43/0894 , H04L47/22
摘要： Aspects of the disclosure provide a method for counting packets and bytes in a distributed packet-switched system. The method includes receiving a packet stream having at least one packet flow at a device of a packet-switched system having a plurality of distributed devices, statistically determining whether to update a designated device based on receipt of a packet belonging to the packet flow, and transmitting packet counting information to the designated device based on the statistical determination, where the designated device counts packets of the packet flow based on the packet counting information.
摘要翻译：本公开的方面提供了一种用于对分布式分组交换系统中的分组和字节进行计数的方法。该方法包括在具有多个分布式设备的分组交换系统的设备处接收具有至少一个分组流的分组流，根据属于分组流的分组的接收统计地确定是否更新指定的设备，以及基于所述统计确定，向指定的设备发送分组计数信息，其中指定的设备基于分组计数信息对分组流的分组进行计数。

7. 发明授权

US11588757B2 Traffic management in a network switching system with remote physical ports 有权
公开(公告)号：US11588757B2
公开(公告)日：2023-02-21
申请号：US16921538
申请日：2020-07-06
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Carmi Arad
IPC分类号： H04L49/90 , H04L49/00 , H04L49/506 , H04L47/11 , H04L47/625
摘要： In a switching system that comprises a central switching device an at least one port extender device, the central switching device includes at least one port configured to interface with the port extender device, and the port extender device includes a plurality of front ports for interfacing with one or more networks. The central switching device includes a processor that processes packets received from the at least one port extender device, and a plurality of egress queues for storing processed packets that are to be forwarded to the at least one port extender device for transmission via ones of the front ports. The central switching device also includes a flow control processor configured to, responsively to flow control messages received from the at least one port extender device, control transmission of packets to the at least one port extender device to prevent overflow of egress queues of the port extender device.

8. 发明授权

US11075859B2 Egress packet processing using a modified packet header separate from a stored payload 有权
公开(公告)号：US11075859B2
公开(公告)日：2021-07-27
申请号：US16746355
申请日：2020-01-17
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： David Melman , Ilan Mayer-Wolf , Carmi Arad , Rami Zemach
IPC分类号： G01R31/08 , H04J1/16 , H04L1/00 , H04L12/861 , H04L12/851 , H04L12/823 , H04L29/06
摘要： At least a payload of a packet that is received by a network device is stored in a packet memory. The packet is processed at least to determine at least one egress port via which the packet is to be transmitted, modify a header of the packet to generate a modified header, and determine, based at least in part on the modified header, whether the packet is to be transmitted or to be discarded by the network device. In response to determining that the packet is to be transmitted, the at least the payload of the packet is retrieved from the packet memory, a transmit packet is generated at least by combining the at least the payload of the packet with the modified header, and the transmit packet is transmitted via the determined at least one egress port of the network device.

9. 发明授权

US10887240B2 Automatic flow learning in network devices 有权
公开(公告)号：US10887240B2
公开(公告)日：2021-01-05
申请号：US16261302
申请日：2019-01-29
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Tal Mizrahi , Rami Zemach , Carmi Arad , David Melman , Yosef Katan
IPC分类号： H04L12/851
摘要： In a network device, a flow classification hardware engine is configured to: store flow state information regarding known flows of packets in a flow information table in association with respective assigned flow identifiers (IDs). The assigned flow IDs are from an ordered set of M flow IDs, where M is a positive integer. In response to detecting new flows of packets, the flow classification hardware engine: i) assigns respective flow IDs, from the ordered set of M flow IDs, to the new flows, and ii) creates respective entries in the flow information table for the new flows. An embedded processor periodically, as part of a background process: i) identifies an oldest assigned flow ID, from the ordered set of M flow IDs, and ii) makes storage space in the flow information table corresponding to the oldest assigned flow ID available for a new flow.

10. 发明授权

US09112708B1 Processing multicast packets in a network device 有权
标题翻译：处理网络设备中的组播数据包
公开(公告)号：US09112708B1
公开(公告)日：2015-08-18
申请号：US13752042
申请日：2013-01-28
申请人： Marvell Israel (M.I.S.L) Ltd.
发明人： Carmi Arad , Gil Levy , Lior Valency , Amir Roitshtein , Sharon Ulman , Dror Bromberg
IPC分类号： H04L12/56 , H04L12/18
CPC分类号： H04L12/18 , H04L49/201 , H04L49/901
摘要： A network switch device comprises a packet processor configured to: write, to a memory, at least a payload of a multicast packet received via one of a plurality of ports, determine that a plurality of instances of the multicast packet are to be transmitted, generate, using an original header of the multicast packet, one or more additional headers, write, to the memory, a plurality of headers including (i) the original header, and (ii) the one or more additional headers in the memory, link each header in the plurality of headers stored in the memory to a location of the payload in the memory, and transmit a plurality of instances of the multicast packet via one or more ports including, for each instance of the multicast packet, reading (i) a respective one of the headers from the memory and (ii) the payload from the location in the memory.
摘要翻译：一种网络交换机设备包括分组处理器，其被配置为：向存储器写入至少通过多个端口之一接收到的多播分组的有效载荷，确定要发送多个组播分组的多个实例，生成使用多播分组的原始报头，一个或多个附加报头，向存储器写入多个报头，其包括（i）原始报头，以及（ii）存储器中的一个或多个附加报头，将每个将存储在存储器中的多个报头中的报头发送到存储器中的有效载荷的位置，并且经由一个或多个端口发送多个多播实例，包括对于多播分组的每个实例，读取（i）相应的一个来自存储器的头部和（ii）从存储器中的位置的有效载荷。

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