公开(公告)号：US08223666B2

公开(公告)日：2012-07-17

申请号：US11211109

申请日：2005-08-23

申请人： Neil Alasdair James Jarvis ,  Crispin Nicholas Dent-Young ,  Alan J. Cheilek ,  Matthew James Collins ,  Christian Cassar ,  Jesper Skriver

发明人： Neil Alasdair James Jarvis ,  Crispin Nicholas Dent-Young ,  Alan J. Cheilek ,  Matthew James Collins ,  Christian Cassar ,  Jesper Skriver

IPC分类号： H04L12/28

CPC分类号： H04L45/54 ,  H04L45/02 ,  H04L45/7457

摘要： A method of constructing a forwarding database for a data communications network comprising a plurality of network components and supporting at least first and second topologies having one or more common network components is described. The forwarding database includes a plurality of entries providing forwarding information for data destined for a related network component. The method comprises the step, performed at a constructing network component, of deriving topology dependent forwarding information for data destined for a network component. The method further comprises the step of including the topology dependent forwarding information at the related forwarding database entry.

摘要翻译： 描述了构建包括多个网络组件并且支持具有一个或多个公共网络组件的至少第一和第二拓扑的数据通信网络的转发数据库的方法。 转发数据库包括多个条目，提供用于相关网络组件的数据的转发信息。 该方法包括在构造网络组件处执行的针对网络组件的数据导出与拓扑相关的转发信息的步骤。 该方法还包括在相关转发数据库条目处包括拓扑相关转发信息的步骤。

公开(公告)号：US20070047463A1

公开(公告)日：2007-03-01

申请号：US11211109

申请日：2005-08-23

申请人： Neil Alasdair Jarvis ,  Crispin Dent-Young ,  Alan Cheilek ,  Matthew Collins ,  Christian Cassar ,  Jesper Skriver

发明人： Neil Alasdair Jarvis ,  Crispin Dent-Young ,  Alan Cheilek ,  Matthew Collins ,  Christian Cassar ,  Jesper Skriver

IPC分类号： H04L12/28

CPC分类号： H04L45/54 ,  H04L45/02 ,  H04L45/7457

摘要： A method of constructing a forwarding database for a data communications network comprising a plurality of network components and supporting at least first and second topologies having one or more common network components is described. The forwarding database includes a plurality of entries providing forwarding information for data destined for a related network component. The method comprises the step, performed at a constructing network component, of deriving topology dependent forwarding information for data destined for a network component. The method further comprises the step of including the topology dependent forwarding information at the related forwarding database entry.

摘要翻译： 描述了构建包括多个网络组件并且支持具有一个或多个公共网络组件的至少第一和第二拓扑的数据通信网络的转发数据库的方法。 转发数据库包括多个条目，提供用于相关网络组件的数据的转发信息。 该方法包括在构造网络组件处执行的针对网络组件的数据导出与拓扑相关的转发信息的步骤。 该方法还包括在相关转发数据库条目处包括拓扑相关转发信息的步骤。

公开(公告)号：US20110153869A1

公开(公告)日：2011-06-23

申请号：US12640506

申请日：2009-12-17

申请人： Stewart Frederick Bryant ,  Kenneth A. Patton ,  Mark L. Hendrickson ,  Rajiv Asati ,  Christian Cassar

发明人： Stewart Frederick Bryant ,  Kenneth A. Patton ,  Mark L. Hendrickson ,  Rajiv Asati ,  Christian Cassar

IPC分类号： G06F15/16

CPC分类号： H04J3/0664 ,  H04J3/0667 ,  H04J3/14

摘要： In one embodiment, a clock on a network device is initialized, and then a first timing message is received at the network device from a reference device having a first timestamp indicating when the first timing message was transmitted from the reference device. The network device may then determine and store a one-way delay from the first timestamp to a first time at which the first timing message was received at the network device. In response to restarting the clock, the network device may receive a second timing message from the reference device having a second timestamp indicating when the second timing message was transmitted from the reference device. The network device may then calibrate the clock such that a second time at which the network device received the second timing message is the second timestamp plus the stored one-way delay.

摘要翻译： 在一个实施例中，初始化网络设备上的时钟，然后在具有第一时间戳的参考设备的网络设备处接收到第一定时消息，该参考设备指示何时从参考设备发送第一定时消息。 然后，网络设备可以确定并存储从第一时间戳到在网络设备处接收到第一定时消息的第一时间的单向延迟。 响应于重新启动时钟，网络设备可以从具有指示从参考设备发送第二定时消息的第二时间戳的参考设备接收第二定时消息。 网络设备然后可以校准时钟，使得网络设备接收到第二定时消息的第二时间是第二时间戳加上存储的单向延迟。

公开(公告)号：US20070112975A1

公开(公告)日：2007-05-17

申请号：US11652359

申请日：2007-01-10

申请人： Christian Cassar

发明人： Christian Cassar

IPC分类号： G06F15/173

CPC分类号： H04L29/12933 ,  H04L29/12349 ,  H04L61/2507 ,  H04L61/6068

摘要： A method and apparatus for redirecting network traffic through a multipoint tunnel overlay network using distinct network address spaces for the overlay and transport networks. In an IP implementation, redirecting traffic to be tunneled across a network comprises deriving the transport IP address of a multipoint tunnel endpoint from the network IP address by making the transport address numerically equivalent to the network address, the transport address being in an address space distinct from the address space of the network address. Traffic is redirected by changing the address space of the next hop in a received routing advertisement.

摘要翻译： 一种用于通过使用用于覆盖和传输网络的不同网络地址空间的多点隧道覆盖网络来重定向网络流量的方法和装置。 在IP实现中，重定向要通过网络隧道传输的流量包括通过使传输地址数字等同于网络地址从网络IP地址导出多点隧道端点的传输IP地址，传输地址在地址空间不同 从地址空间的网络地址。 通过改变接收到的路由通告中的下一跳的地址空间重定向流量。

公开(公告)号：US08812739B2

公开(公告)日：2014-08-19

申请号：US12640506

申请日：2009-12-17

申请人： Stewart Frederick Bryant ,  Kenneth A. Patton ,  Mark L. Hendrickson ,  Rajiv Asati ,  Christian Cassar

发明人： Stewart Frederick Bryant ,  Kenneth A. Patton ,  Mark L. Hendrickson ,  Rajiv Asati ,  Christian Cassar

IPC分类号： G06F15/16

CPC分类号： H04J3/0664 ,  H04J3/0667 ,  H04J3/14

摘要： In one embodiment, a clock on a network device is initialized, and then a first timing message is received at the network device from a reference device having a first timestamp indicating when the first timing message was transmitted from the reference device. The network device may then determine and store a one-way delay from the first timestamp to a first time at which the first timing message was received at the network device. In response to restarting the clock, the network device may receive a second timing message from the reference device having a second timestamp indicating when the second timing message was transmitted from the reference device. The network device may then calibrate the clock such that a second time at which the network device received the second timing message is the second timestamp plus the stored one-way delay.

摘要翻译： 在一个实施例中，初始化网络设备上的时钟，然后在具有第一时间戳的参考设备的网络设备处接收到第一定时消息，该参考设备指示何时从参考设备发送第一定时消息。 然后，网络设备可以确定并存储从第一时间戳到在网络设备处接收到第一定时消息的第一时间的单向延迟。 响应于重新启动时钟，网络设备可以从具有指示从参考设备发送第二定时消息的第二时间戳的参考设备接收第二定时消息。 网络设备然后可以校准时钟，使得网络设备接收到第二定时消息的第二时间是第二时间戳加上存储的单向延迟。

公开(公告)号：US08537840B1

公开(公告)日：2013-09-17

申请号：US13190867

申请日：2011-07-26

申请人： Robert Raszuk ,  Christian Cassar

发明人： Robert Raszuk ,  Christian Cassar

IPC分类号： H04L12/28

CPC分类号： H04L45/04 ,  H04L45/12 ,  H04L45/42

摘要： In one embodiment, an angular distance calculation technique may enable an intermediate node, such as a route reflector, to render customized best path selection decisions to destination address prefixes and advertise those decisions to its intermediate peering nodes, i.e., route reflector clients, in an autonomous system of a computer network. That is, the route reflector may execute a routing protocol, such as BGP, to select and advertise a next hop (e.g., an address prefix of an egress point of the autonomous system) associated with a customized best path to a route reflector client based on an angular distance between the route reflector client and the egress point. In this manner, the route reflector client may route data traffic destined to a destination address prefix utilizing the egress point associated with the customized best path to that prefix.

摘要翻译： 在一个实施例中，角距离计算技术可以使中间节点（例如路由反射器）能够将定制的最佳路径选择决策呈现给目的地地址前缀，并将这些决定通告给其中间对等节点，即路由反射器客户端， 计算机网络的自主系统。 也就是说，路由反射器可以执行诸如BGP的路由协议，以选择并通告与定制的路由反射器客户端的定制最佳路径相关联的下一跳（例如，自治系统的出口点的地址前缀） 在路线反射器客户端和出口点之间的角距离上。 以这种方式，路由反射器客户端可以使用与定制的最佳路径相关联的出口点将去往目的地地址前缀的数据业务路由到该前缀。

公开(公告)号：US07185107B1

公开(公告)日：2007-02-27

申请号：US10270409

申请日：2002-10-02

申请人： Christian Cassar

发明人： Christian Cassar

IPC分类号： G06F15/16

CPC分类号： H04L29/12933 ,  H04L29/12349 ,  H04L61/2507 ,  H04L61/6068

摘要： A method and apparatus for redirecting network traffic through a multipoint tunnel overlay network using distinct network address spaces for the overlay and transport networks. In an IP implementation, redirecting traffic to be tunneled across a network comprises deriving the transport IP address of a multipoint tunnel endpoint from the network IP address by making the transport address numerically equivalent to the network address, the transport address being in an address space distinct from the address space of the network address. Traffic is redirected by changing the address space of the next hop in a received routing advertisement.