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1. 发明授权

US09479425B2 System and method for broadcasting data to multiple hardware forwarding engines 有权
标题翻译：用于向多个硬件转发引擎广播数据的系统和方法
公开(公告)号：US09479425B2
公开(公告)日：2016-10-25
申请号：US14270043
申请日：2014-05-05
申请人： Hugh W. Holbrook , Sriram Sellappa , Neal Thomas Nuckolls
发明人： Hugh W. Holbrook , Sriram Sellappa , Neal Thomas Nuckolls
IPC分类号： H04L12/761 , G06F12/10 , G06F13/28 , H04L12/931
CPC分类号： G06F3/0619 , G06F3/065 , G06F3/067 , G06F12/1081 , G06F13/28 , G06F13/4022 , H04L12/18 , H04L45/16 , H04L49/00 , H04L49/309
摘要： A method and apparatus of a device that broadcasts data to multiple hardware forwarding engines is described. In an exemplary embodiment, a central processing unit of the device receives the data to broadcast to the plurality of hardware forwarding engines. The device further writes the data to a broadcast log. In addition, the device transmits a signal to one or more co-processors that the data is available to be read, wherein each of the plurality of hardware forwarding corresponds to one of the one or more co-processors. Each of these co-processors reads the data in the broadcast log by receiving the signal that the data is ready to be read from the broadcast log. In addition, each co-processor determines a broadcast log entry for the data for that co-processor. Each co-processor further reads the data from the broadcast log entry via a direct memory access in memory that stores the broadcast log and the plurality of hardware forwarding engines use the data to process network traffic.
摘要翻译：描述了向多个硬件转发引擎广播数据的设备的方法和装置。在示例性实施例中，设备的中央处理单元接收数据以广播到多个硬件转发引擎。设备还将数据写入广播日志。另外，设备向一个或多个协处理器发送数据可用于读取的信号，其中多个硬件转发中的每一个对应于一个或多个协处理器之一。这些协处理器中的每一个通过接收从准备从广播日志读取的数据的信号来读取广播日志中的数据。另外，每个协处理器确定该协处理器的数据的广播日志条目。每个协处理器通过存储广播日志的存储器中的直接存储器访问进一步从广播日志条目读取数据，并且多个硬件转发引擎使用数据来处理网络流量。

2. 发明授权

US09367251B2 System and method of a shared memory hash table with notifications 有权
标题翻译：具有通知的共享内存哈希表的系统和方法
公开(公告)号：US09367251B2
公开(公告)日：2016-06-14
申请号：US14270226
申请日：2014-05-05
申请人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa , Simon Francis Capper
发明人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa , Simon Francis Capper
IPC分类号： G06F17/30 , H04L12/743 , G06F3/06
CPC分类号： G06F3/0604 , G06F3/0614 , G06F3/0638 , G06F3/0653 , G06F3/0655 , G06F3/067 , G06F3/0673 , G06F17/30348 , H04L45/7453
摘要： A method and apparatus of a device that includes a shared memory hash table that notifies one or more readers of changes to the shared memory hash table is described. In an exemplary embodiment, a device modifies a value in the shared memory hash table, where the value has a corresponding key. The device further stores a notification in a notification queue that indicates the value has changed. In addition, the device invalidates a previous entry in the notification queue that indicates the value has been modified. The device signals to the reader that a notification is ready to be processed.
摘要翻译：描述了一种设备的方法和装置，其包括向一个或多个读取器通知对共享存储器散列表的改变的共享存储器散列表。在示例性实施例中，设备修改共享存储器散列表中的值，其中该值具有对应的密钥。设备还将通知存储在指示值已经改变的通知队列中。另外，设备使通知队列中的先前条目无效，表示该值已被修改。设备向读写器发出通知已准备好处理的信号。

3. 发明申请

US20150006953A1 SYSTEM AND METHOD OF A HARDWARE SHADOW FOR A NETWORK ELEMENT 有权
标题翻译：网络元件的硬件阴影的系统和方法
公开(公告)号：US20150006953A1
公开(公告)日：2015-01-01
申请号：US14270190
申请日：2014-05-05
申请人： Hugh W. Holbrook , Sriram Sellappa
发明人： Hugh W. Holbrook , Sriram Sellappa
IPC分类号： G06F11/07
CPC分类号： G06F11/0724 , G06F11/1658 , G06F11/2028 , G06F11/2033 , G06F11/2038 , G06F11/2097 , H04L69/321 , H04L69/40
摘要： A method and apparatus of a device that uses a hardware shadow for a central processing unit failover is described. In an exemplary embodiment, a device receives a signal that the active central processing unit has failed, where the active central processing unit controls the processing functions of the network element and the network element includes a hardware forwarding engine and a hardware shadow. The hardware shadow additionally includes multiple shadow tables. For each shadow table, the device copies data from that shadow table to a corresponding table in the hardware forwarding engine, where the hardware shadow is a copy of the data stored in hardware tables for the hardware forwarding engine. In response to the copying, the device further switches control of the network element processing functions from the active central processing unit to a standby central processing unit.
摘要翻译：描述了使用硬件阴影用于中央处理单元故障切换的设备的方法和装置。在示例性实施例中，设备接收活动中央处理单元已经失败的信号，其中活动中央处理单元控制网络元件的处理功能，并且网络元件包括硬件转发引擎和硬件阴影。硬件影子还包括多个影子表。对于每个影子表，设备将数据从该影子表复制到硬件转发引擎中的相应表中，其中硬件影子是存储在硬件转发引擎的硬件表中的数据的副本。响应于复制，设备还将网元处理功能的控制从活动中央处理单元切换到备用中央处理单元。

4. 发明授权

US07401169B2 Counter updating system using an update mechanism and different counter utilization mechanism 有权
标题翻译：使用更新机制的计数器更新系统和不同的计数器利用机制
公开(公告)号：US07401169B2
公开(公告)日：2008-07-15
申请号：US11132759
申请日：2005-05-18
申请人： Hugh W. Holbrook
发明人： Hugh W. Holbrook
IPC分类号： G06F3/00 , G06F5/00 , G06F12/00 , G06F12/06 , G06F13/28 , G06F13/00 , G06F15/16
CPC分类号： H04L49/9078 , H04L49/90 , H04L49/9073 , Y10S707/99953 , Y10S707/99955
摘要： Disclosed are, inter alia, methods, apparatus, data structures, computer-readable media, and mechanisms for maintaining counters, such as in, but not limited to a packet switching system, and updating a secondary counter storage based on values of the counters and entries in an overflow buffer. Multiple counter values are stored in a counter bank. An indication of a particular counter of the multiple counters to update is received. A current value of the particular counter is updated in the counter bank, and if an overflow condition results, then an indication of the particular counter is added to an overflow buffer. Periodically each of the multiple counters is visited and corresponding values are updated in a secondary storage, and each entry is retrieved from the overflow buffer and a corresponding value is updated in the secondary storage.
摘要翻译：公开了诸如方法，装置，数据结构，计算机可读介质和用于维护计数器的机制，诸如在但不限于分组交换系统，以及基于计数器的值更新次计数器存储器，以及溢出缓冲区中的条目。多个计数器值存储在计数器存储区中。接收到要更新的多个计数器的特定计数器的指示。特定计数器的当前值在计数器组中被更新，并且如果溢出条件导致，则特定计数器的指示被添加到溢出缓冲器。周期性地访问多个计数器中的每一个并且在辅助存储器中更新对应的值，并且从溢出缓冲器检索每个条目，并在辅助存储器中更新对应的值。

5. 发明授权

US09584327B2 System and method for authentication for transceivers 有权
标题翻译：收发器认证系统和方法
公开(公告)号：US09584327B2
公开(公告)日：2017-02-28
申请号：US14448873
申请日：2014-07-31
申请人： Alexander Channing Ho , Hugh W. Holbrook , Lorenz Wolfgang Redlefsen
发明人： Alexander Channing Ho , Hugh W. Holbrook , Lorenz Wolfgang Redlefsen
IPC分类号： H04L29/06 , H04L9/32 , H04B1/38
CPC分类号： H04L9/3247 , H04B1/38
摘要： A method and apparatus of a network element that authenticates a transceiver and/or a field replaceable unit of the network element is described. The network element generates a stored transceiver signature using transceiver data stored in the removable transceiver and a nonce. In addition, the network element generates a hardware transceiver signature using data stored in secure storage of the network element and the nonce. If the stored transceiver signature and the hardware transceiver signature are equal, the network element uses the transceiver to communicate network data for the network element. Otherwise, the network element disables the transceiver.
摘要翻译：描述了认证网元的收发器和/或现场可更换单元的网元的方法和装置。网络元件使用存储在可移动收发器中的收发器数据和随机数生成存储的收发器签名。此外，网络元件使用存储在网络元件的安全存储器中的数据和随机数生成硬件收发器签名。如果存储的收发器签名和硬件收发器签名相等，则网元使用收发器来传送网元的网络数据。否则，网元将禁用收发器。

6. 发明授权

US09030931B2 Latency analysis of traffic passing through an ethernet switch 有权
标题翻译：通过以太网交换机的流量的延迟分析
公开(公告)号：US09030931B2
公开(公告)日：2015-05-12
申请号：US13420527
申请日：2012-03-14
申请人： Kenneth J. Duda , Anshul Sadana , Hugh W. Holbrook
发明人： Kenneth J. Duda , Anshul Sadana , Hugh W. Holbrook
IPC分类号： H04L12/26 , H04L12/801 , H04L12/939 , H04L12/841 , H04L12/835 , H04L12/931
CPC分类号： H04L43/0852 , H04L43/106 , H04L47/11 , H04L47/28 , H04L47/30 , H04L49/351 , H04L49/555
摘要： A method for accurately measuring, recording and reporting latency of an Ethernet switch is disclosed. Various packet queues in the switch are monitored at any given time and forwarding latency is calculated. Latency data from multiple switching elements in a network is collected to provide end-to-end forwarding latency of a system.
摘要翻译：公开了一种用于精确测量，记录和报告以太网交换机的延迟的方法。在任何给定时间监视交换机中的各种数据包队列，并计算转发等待时间。收集网络中多个交换元件的延迟数据，以提供系统的端到端转发延迟。

7. 发明申请

US20140337593A1 SYSTEM AND METHOD FOR READING AND WRITING DATA WITH A SHARED MEMORY HASH TABLE 有权
标题翻译：用共享存储器表读取和写入数据的系统和方法
公开(公告)号：US20140337593A1
公开(公告)日：2014-11-13
申请号：US14270122
申请日：2014-05-05
申请人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa
发明人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa
IPC分类号： G06F3/06 , G06F12/10
CPC分类号： G06F3/065 , G06F3/0614 , G06F3/0638 , G06F3/0673 , G06F12/1027 , G06F17/30097 , G06F2003/0691 , G06F2212/507 , H04L45/7453
摘要： A method and apparatus of a device that reads and writes data using a shared memory hash table and a lookaside buffer is described. In an exemplary embodiment, a device locates a bucket for the data in a shared memory hash table, where a writer updates the shared memory hash table and a reader that is one of a plurality of readers reads from the shared memory hash table. The device further retrieves an initial value of a version of the bucket. If the initial value of the version is odd, the device copies the data from a lookaside buffer of the writer to a local buffer for the reader, wherein the lookaside buffer stores a copy of the data while the bucket is being modified.
摘要翻译：描述了使用共享存储器散列表和后备缓冲器来读取和写入数据的设备的方法和装置。在示例性实施例中，设备将数据的桶定位在共享存储器散列表中，其中写入器更新共享存储器散列表，并且读取器是从多个读取器中的一个读取器从共享存储器散列表读取的。设备进一步检索桶的版本的初始值。如果版本的初始值是奇数，则设备将数据从写入器的后备缓冲器复制到读取器的本地缓冲器，其中后备缓冲器存储在修改存储桶时数据的副本。

8. 发明申请

US20180012633A1 SYSTEM AND METHOD FOR DETERMINING A CAUSE OF NETWORK CONGESTION 审中-公开
公开(公告)号：US20180012633A1
公开(公告)日：2018-01-11
申请号：US15693337
申请日：2017-08-31
申请人： Hugh W. Holbrook , Kenneth James Duda , Douglas Gourlay , Anshul Sadana
发明人： Hugh W. Holbrook , Kenneth James Duda , Douglas Gourlay , Anshul Sadana
IPC分类号： G11C5/06 , G11C11/4093 , H01L25/18 , G11C5/02 , G11C11/4076 , H01L25/065 , H01L27/108
CPC分类号： G11C5/063 , G11C5/02 , G11C11/4076 , G11C11/4093 , H01L25/0657 , H01L25/18 , H01L27/108 , H01L2225/06541 , H01L2924/0002 , H01L2924/14 , H01L2924/19043 , H01L2924/3011 , H04L43/04 , H04L43/062 , H04L47/10 , H04L47/30 , H04L47/32
摘要： A method and apparatus of a device that determines a cause and effect of congestion in this device is described. In an exemplary embodiment, the device measures a queue group occupancy of a queue group for a port in the device, where the queue group stores a plurality of packets to be communicated through that port. In addition, the device determines if the measurement indicates a potential congestion of the queue group, where the congestion prevents a packet from being communicated within a time period. If potential congestion exists on that queue group, the device further gathers information regarding packets to be transmitted through that port. For example, the device can gather statistics packets that are stored in the queue group and/or new enqueue packets.

9. 发明授权

US09594612B2 System and method of a hardware shadow for a network element 有权
标题翻译：网络元件的硬件阴影的系统和方法
公开(公告)号：US09594612B2
公开(公告)日：2017-03-14
申请号：US14270190
申请日：2014-05-05
申请人： Hugh W. Holbrook , Sriram Sellappa
发明人： Hugh W. Holbrook , Sriram Sellappa
IPC分类号： G06F11/00 , G06F11/07 , H04L29/08 , G06F11/20 , H04L29/14 , G06F11/16
CPC分类号： G06F11/0724 , G06F11/1658 , G06F11/2028 , G06F11/2033 , G06F11/2038 , G06F11/2097 , H04L69/321 , H04L69/40
摘要： A method and apparatus of a device that uses a hardware shadow for a central processing unit failover is described. In an exemplary embodiment, a device receives a signal that the active central processing unit has failed, where the active central processing unit controls the processing functions of the network element and the network element includes a hardware forwarding engine and a hardware shadow. The hardware shadow additionally includes multiple shadow tables. For each shadow table, the device copies data from that shadow table to a corresponding table in the hardware forwarding engine, where the hardware shadow is a copy of the data stored in hardware tables for the hardware forwarding engine. In response to the copying, the device further switches control of the network element processing functions from the active central processing unit to a standby central processing unit.
摘要翻译：描述了使用硬件阴影用于中央处理单元故障切换的设备的方法和装置。在示例性实施例中，设备接收活动中央处理单元已经失败的信号，其中活动中央处理单元控制网络元件的处理功能，并且网络元件包括硬件转发引擎和硬件阴影。硬件影子还包括多个影子表。对于每个影子表，设备将数据从该影子表复制到硬件转发引擎中的相应表中，其中硬件影子是存储在硬件转发引擎的硬件表中的数据的副本。响应于复制，设备进一步将网元处理功能的控制从活动中央处理单元切换到备用中央处理单元。

10. 发明授权

US09495114B2 System and method for reading and writing data with a shared memory hash table 有权
标题翻译：用共享内存哈希表读写数据的系统和方法
公开(公告)号：US09495114B2
公开(公告)日：2016-11-15
申请号：US14270122
申请日：2014-05-05
申请人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa
发明人： Hugh W. Holbrook , Duncan Stuart Ritchie , Sebastian Sapa
IPC分类号： G06F17/30 , G06F12/10 , G06F3/06 , H04L12/743
CPC分类号： G06F3/065 , G06F3/0614 , G06F3/0638 , G06F3/0673 , G06F12/1027 , G06F17/30097 , G06F2003/0691 , G06F2212/507 , H04L45/7453
摘要： A method and apparatus of a device that reads and writes data using a shared memory hash table and a lookaside buffer is described. In an exemplary embodiment, a device locates a bucket for the data in a shared memory hash table, where a writer updates the shared memory hash table and a reader that is one of a plurality of readers reads from the shared memory hash table. The device further retrieves an initial value of a version of the bucket. If the initial value of the version is odd, the device copies the data from a lookaside buffer of the writer to a local buffer for the reader, wherein the lookaside buffer stores a copy of the data while the bucket is being modified.
摘要翻译：描述了使用共享存储器散列表和后备缓冲器来读取和写入数据的设备的方法和装置。在示例性实施例中，设备将数据的桶定位在共享存储器散列表中，其中写入器更新共享存储器散列表，并且读取器是从多个读取器中的一个读取器从共享存储器散列表读取的。设备进一步检索桶的版本的初始值。如果版本的初始值是奇数，则设备将数据从写入器的后备缓冲器复制到读取器的本地缓冲器，其中后备缓冲器存储在修改存储桶时数据的副本。

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