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    Timestamping packets in a network
    43.
    发明授权
    Timestamping packets in a network 有权

    公开(公告)号：US09641409B2

    公开(公告)日：2017-05-02

    申请号：US14701882

    申请日：2015-05-01

    Applicant: Cisco Technology, Inc.

    Inventor： Thomas J. Edsall ,  Wei-Jen Huang ,  Chih-Tsung Huang ,  Yichou Lin

    IPC: H04J3/14 ,  H04J3/24 ,  H04L12/28 ,  H04B7/212 ,  G06F15/16 ,  H04L12/26 ,  H04L29/08

    CPC classification number: H04L43/0852 ,  H04L43/106 ,  H04L69/321

    Abstract: Techniques are presented herein to facilitate latency measurements in a networking environment. A first network device receives a packet for transport within a network domain that comprises a plurality of network devices. The plurality of network devices have a common time reference, that is, they are time synchronized. The first network device generates timestamp information indicating time of arrival of the packet at the first network device. The first network device inserts into the packet a tag that comprises at least a first subfield and a second subfield. The first subfield comprising a type indicator to signify to other network devices in the network domain that the tag includes timestamp information, and the second subfield includes the timestamp information. The first network device sends the packet from to into the network domain to another network device. Other network devices which receive that packet can make latency measurements.

    Indexed access to a forwarding table in a network device
    45.
    发明授权
    Indexed access to a forwarding table in a network device 有权
    索引访问网络设备中的转发表

    公开(公告)号：US09565100B1

    公开(公告)日：2017-02-07

    申请号：US14921460

    申请日：2015-10-23

    Applicant: Cisco Technology, Inc.

    Inventor： Thomas J. Edsall ,  Alessandro Fulli ,  Putu Harry Subagio ,  Chih-Tsung Huang

    IPC: H04L12/741

    CPC classification number: H04L45/54 ,  H04L12/6418

    Abstract: A packet is received at an ingress port of a network device. Based on forwarding information in the packet, an adjacency point is generated using a forwarding information database. If the packet is a routed packet, the adjacency pointer is used as an index to an entry in a media access control (MAC) table that identifies an egress port for the packet. If the packet is not a routed packet, a search is performed in the MAC table to locate an entry in the MAC table that identifies an egress port for the packet.

    Abstract translation: 在网络设备的入口端口接收到分组。 基于分组中的转发信息，使用转发信息数据库生成邻接点。 如果分组是路由分组，则邻接指针被用作标识分组的出口端口的媒体接入控制（MAC）表中的条目的索引。 如果分组不是路由分组，则在MAC表中执行搜索以在MAC表中定位用于标识分组的出口端口的条目。

    Indexed access to a forwarding table in a network device
    47.
    发明授权
    Indexed access to a forwarding table in a network device 有权
    索引访问网络设备中的转发表

    公开(公告)号：US09197552B1

    公开(公告)日：2015-11-24

    申请号：US13767091

    申请日：2013-02-14

    Applicant: Cisco Technology, Inc.

    Inventor： Thomas J. Edsall ,  Alessandro Fulli ,  Putu Harry Subagio ,  Chih-Tsung Huang

    IPC: H04L12/741

    CPC classification number: H04L45/54 ,  H04L12/6418

    Abstract: A packet is received at an ingress port of a network device. Based on forwarding information in the packet, an adjacency point is generated using a forwarding information database. If the packet is a routed packet, the adjacency pointer is used as an index to an entry in a media access control (MAC) table that identifies an egress port for the packet. If the packet is not a routed packet, a search is performed in the MAC table to locate an entry in the MAC table that identifies an egress port for the packet.

    Abstract translation: 在网络设备的入口端口接收到分组。 基于分组中的转发信息，使用转发信息数据库生成邻接点。 如果分组是路由分组，则邻接指针被用作标识分组的出口端口的媒体接入控制（MAC）表中的条目的索引。 如果分组不是路由分组，则在MAC表中执行搜索以在MAC表中定位用于标识分组的出口端口的条目。

    Exporting Real Time Network Traffic Latency and Buffer Occupancy
    48.
    发明申请
    Exporting Real Time Network Traffic Latency and Buffer Occupancy 审中-公开
    导出实时网络流量延迟和缓冲区占用率

    公开(公告)号：US20150244637A1

    公开(公告)日：2015-08-27

    申请号：US14707139

    申请日：2015-05-08

    Applicant: Cisco Technology, Inc.

    Inventor： Thomas J. Edsall ,  Yue J. Yang ,  Wei-Jen Huang ,  Chih-Tsung Huang

    IPC: H04L12/835 ,  H04L12/26

    CPC classification number: H04L43/045 ,  H04L43/08 ,  H04L43/0882 ,  H04L43/10 ,  H04L47/24 ,  H04L47/30

    Abstract: Techniques are presented herein to facilitate the monitoring of occupancy of a buffer in a network device. Packets are received at a network device. Information is captured describing occupancy of the buffer caused by packet flow through the buffer in the network device. Analytics packets are generated containing the information. The analytics packets from the network device for retrieval of the information contained therein for analysis, replay of buffer occupancy, etc.

    Abstract translation: 这里呈现技术以便于监视网络设备中的缓冲器的占用。 数据包在网络设备上被接收。 捕获的信息描述了通过网络设备中的缓冲器的分组流引起的缓冲区的占用。 生成包含该信息的分析数据包。 来自网络设备的用于检索其中所包含的信息的分析分组用于分析，重放缓冲器占用等

    Timestamping packets in a network
    49.
    发明授权
    Timestamping packets in a network 有权
    在网络中时间戳数据包

    公开(公告)号：US09054967B1

    公开(公告)日：2015-06-09

    申请号：US13708347

    申请日：2012-12-07

    Applicant: Cisco Technology, Inc.

    Inventor： Thomas J. Edsall ,  Wei-Jen Huang ,  Chih-Tsung Huang ,  Yichou Lin

    IPC: H04J3/14 ,  H04L12/28 ,  H04B7/212 ,  H04L12/16 ,  G06F15/16 ,  H04L12/26

    CPC classification number: H04L43/0852 ,  H04L43/106 ,  H04L69/321

    Abstract: Techniques are presented herein to facilitate latency measurements in a networking environment. A first network device receives a packet for transport within a network domain that comprises a plurality of network devices. The plurality of network devices have a common time reference, that is, they are time synchronized. The first network device generates timestamp information indicating time of arrival of the packet at the first network device. The first network device inserts into the packet a tag that comprises at least a first subfield and a second subfield. The first subfield comprising a type indicator to signify to other network devices in the network domain that the tag includes timestamp information, and the second subfield includes the timestamp information. The first network device sends the packet from to into the network domain to another network device. Other network devices which receive that packet can make latency measurements.

    Abstract translation: 本文介绍了技术来促进网络环境中的延迟测量。 第一网络设备在包括多个网络设备的网络域内接收用于传输的分组。 多个网络设备具有公共时间参考，即它们是时间同步的。 第一网络设备生成指示在第一网络设备处的分组到达时间的时间戳信息。 第一网络设备将包括至少第一子字段和第二子字段的标签插入包中。 所述第一子字段包括类型指示符以表示所述网络域中的其他网络设备，所述标签包括时间戳信息，并且所述第二子字段包括所述时间戳信息。 第一个网络设备将数据包从网络域发送到另一个网络设备。 接收该数据包的其他网络设备可以进行延迟测量。

    TERNARY CONTENT ADDRESSABLE MEMORY UTILIZING COMMON MASKS AND HASH LOOKUPS
    50.
    发明申请
    TERNARY CONTENT ADDRESSABLE MEMORY UTILIZING COMMON MASKS AND HASH LOOKUPS 有权
    使用常见掩码和哈希查询的第三内容可寻址记忆

    公开(公告)号：US20150127900A1

    公开(公告)日：2015-05-07

    申请号：US14490566

    申请日：2014-09-18

    Applicant: Cisco Technology, Inc.

    Inventor： Sarang M. Dharmapurikar ,  Francisco M. Matus ,  Kit Chiu Chu ,  Georges Akis ,  Thomas J. Edsall

    IPC: G11C15/04

    CPC classification number: H04L45/7453 ,  G06F9/30018 ,  G06K15/107 ,  G11C11/4096 ,  G11C15/00 ,  G11C15/04 ,  G11C2207/002 ,  H04L45/24 ,  H04L47/125

    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.

    Abstract translation: 基于其他类型的存储器（例如，SRAM）结合处理（包括散列函数）实现的三元内容可寻址存储器（TCAM）。 这样的H-TCAM可以用于例如路由设备的实现。 一种在网络设备上存储路由信息的方法，所述路由信息包括多个条目，每个条目具有密钥值和掩码值，通过标识多个组来开始，每个组包括具有不同的条目的子集数目 普通面具。 通过确定具有公共掩码值的条目的子集数目来识别这些组，这意味着掩码值的至少一部分对于子集数目的条目的所有条目是相同的。

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