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1. 发明授权

US07373543B1 Method and apparatus for uninterrupted packet transfer using replication over disjoint paths 有权
标题翻译：用于通过不相交路径进行复制的不间断数据包传输的方法和装置
公开(公告)号：US07373543B1
公开(公告)日：2008-05-13
申请号：US10820257
申请日：2004-04-08
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： G06F11/00
CPC分类号： H04L45/28 , H04L45/00 , H04L45/24
摘要： A method of operating a fault tolerant connection in a network is described. The network includes a number of network elements and a number of links. Each of the network elements is coupled to at least one other of the network elements by at least one of the links. The method identifies a first path and a second path. The first path is between a first one of the network elements and a second one of the network elements, as is the second path. Moreover, the first path and the second path are disjoint. This disjointedness can be any difference between the two paths (e.g., any combination of different network elements or links). A packet is sent from the first one of the network elements via the first path, while a duplicate packet is sent from the first one of the network elements via the second path. The duplicate packet is a duplicate of the packet. Once these packets have been sent, at least one of the packet and the duplicate packet are received at the second one of the network elements. If both the packet and the duplicate packet are received at the second one of the network elements, one of the two is discarded (e.g., by simply ignoring the last one received).
摘要翻译：描述了在网络中操作容错连接的方法。该网络包括多个网络元件和多个链路。每个网络元件通过链路中的至少一个耦合到网络元件中的至少另一个。该方法识别第一路径和第二路径。第一路径在网络元件中的第一路径和网络元件中的第二路径之间，和第二路径一样。此外，第一路径和第二路径是不相交的。这种不相容性可以是两个路径之间的任何差异（例如，不同网络元件或链路的任何组合）。经由第一路径从第一网络元件发送分组，同时经由第二路径从第一网络单元发送重复分组。重复的数据包是数据包的副本。一旦这些分组被发送，则在第二个网络单元中接收到分组和重复分组中的至少一个。如果在第二个网络元件处接收到分组和重复分组，则丢弃两个分组中的一个（例如，通过简单地忽略所接收的最后一个）。

2. 发明授权

US07773515B2 Method and apparatus for estimating delay and jitter between many network routers using measurements between a preferred set of routers 有权
标题翻译：用于使用优选的一组路由器之间的测量来估计许多网络路由器之间的延迟和抖动的方法和装置
公开(公告)号：US07773515B2
公开(公告)日：2010-08-10
申请号：US11168071
申请日：2005-06-28
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： H04L12/26 , G01R31/08 , G06F15/173 , G06F15/177
CPC分类号： H04L43/087 , H04L43/0858
摘要： A method and apparatus for determining a network performance metric in a network is described. The network includes a number of network elements and a number of links. Each of the network elements is coupled to at least one other of the network elements by at least one of the links. The method includes forming a first set of network element pairs, ordering a first number of network element pairs, forming a second set of network element pairs, measuring a measured network performance metric between a first network element pair and computing a computed network performance metric. The first set of network element pairs include a number of pairs of the network elements. The ordering of a first number of network element pairs includes network element pairs in the first set of network element pairs. The second set of network element pairs includes network element pairs in the first set of network element pairs. The measurement is taken between a first network element pair. The first network element pair includes a first network element and a second network element of one of the network element pairs in the second set of network element pairs. The computed network performance metric is computed between a second network element pair using the measured network performance metric. The second network element pair includes a first network element and a second network element of the network element pair in the first set of network element pairs.
摘要翻译：描述了一种用于确定网络中的网络性能度量的方法和装置。该网络包括多个网络元件和多个链路。每个网络元件通过链路中的至少一个耦合到网络元件中的至少另一个。该方法包括形成第一组网元对，排序第一数量的网元对，形成第二组网元对，测量第一网元对之间的测量网络性能度量并计算计算出的网络性能度量。第一组网元对包括多对网元。第一数量的网元对的排序包括第一组网元对中的网元对。第二组网元对包括第一组网元对中的网元对。在第一网络元件对之间进行测量。所述第一网元对包括所述第二网元对中的所述网元对之一的第一网元和第二网元。使用测量的网络性能度量在第二网元对之间计算所计算的网络性能度量。所述第二网元对包括所述第一组网元中的所述网元对的第一网元和第二网元。

3. 发明授权

US06912203B1 Method and apparatus for estimating delay and jitter between many network routers using measurements between a preferred set of routers 失效
标题翻译：用于使用优选的一组路由器之间的测量来估计许多网络路由器之间的延迟和抖动的方法和装置
公开(公告)号：US06912203B1
公开(公告)日：2005-06-28
申请号：US09638180
申请日：2000-07-31
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： G01R31/08 , H04L12/26 , H04L12/28
CPC分类号： H04L43/087 , H04L43/0858
摘要： A method and apparatus for determining a network performance metric in a network is described. The network includes a number of network elements and a number of links. Each of the network elements is coupled to at least one other of the network elements by at least one of the links. The method includes forming a first set of network element pairs, ordering a first number of network element pairs, forming a second set of network element pairs, measuring a measured network performance metric between a first network element pair and computing a computed network performance metric.
摘要翻译：描述了一种用于确定网络中的网络性能度量的方法和装置。该网络包括多个网络元件和多个链路。每个网络元件通过链路中的至少一个耦合到网络元件中的至少另一个。该方法包括形成第一组网元对，排序第一数量的网元对，形成第二组网元对，测量第一网元对之间的测量网络性能度量并计算计算出的网络性能度量。

4. 发明授权

US06885642B1 Method and apparatus for estimating delay and jitter between network routers coupled to background network 失效
标题翻译：用于估计耦合到背景网络的网络路由器之间的延迟和抖动的方法和装置
公开(公告)号：US06885642B1
公开(公告)日：2005-04-26
申请号：US09609302
申请日：2000-06-30
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： H04L12/56
CPC分类号： H04L45/121
摘要： A delay measurement technique according to an embodiment according to the present invention is based on the precept, ascertained by the inventors, that a link between network nodes will often contribute to the delay encountered between several different pairs of network nodes. Such a technique identifies the path between each pair of nodes by a list of links that form the path. Paths that are orthogonal are treated as being necessary for describing the delays encountered between nodes, and, once the requisite set of orthogonal paths has been derived, all other paths can be described in terms of one or more of these orthogonal paths. Such a technique also lends itself to matrix representation of the paths, and the use of matrix manipulation techniques in deriving delay and jitter.
摘要翻译：根据本发明的实施例的延迟测量技术基于由发明人确定的规则，网络节点之间的链路通常将有助于在几个不同的网络节点对之间遇到的延迟。这种技术通过形成路径的链接列表来识别每对节点之间的路径。正交的路径被视为描述在节点之间遇到的延迟所必需的，并且一旦已经导出必需的正交路径集合，就可以用这些正交路径中的一个或多个来描述所有其他路径。这种技术也适用于路径的矩阵表示，以及使用矩阵操纵技术来推导延迟和抖动。

5. 发明授权

US06868068B1 Method and apparatus for estimating delay and jitter between network routers 失效
标题翻译：用于估计网络路由器之间的延迟和抖动的方法和装置
公开(公告)号：US06868068B1
公开(公告)日：2005-03-15
申请号：US09746233
申请日：2000-12-21
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L43/087
摘要： A delay measurement technique according to an embodiment according to the present invention is based on the precept, ascertained by the inventors, that a link between network nodes will often contribute to the delay encountered between several different pairs of network nodes. Such a technique identifies the path between each pair of nodes by a list of links that form the path. Paths that are orthogonal are treated as being necessary for describing the delays encountered between nodes, and, once the requisite set of orthogonal paths has been derived, all other paths can be described in terms of one or more of these orthogonal paths. Such a technique also lends itself to matrix representation of the paths, and the use of matrix manipulation techniques in deriving delay and jitter.
摘要翻译：根据本发明的实施例的延迟测量技术基于由发明人确定的规则，网络节点之间的链路通常将有助于在几个不同的网络节点对之间遇到的延迟。这种技术通过形成路径的链接列表来识别每对节点之间的路径。正交的路径被视为描述在节点之间遇到的延迟所必需的，并且一旦已经导出必需的正交路径集合，就可以用这些正交路径中的一个或多个来描述所有其他路径。这种技术也适用于路径的矩阵表示，以及使用矩阵操纵技术来推导延迟和抖动。

6. 发明授权

US07111073B1 Apparatus for estimating delay and jitter between network routers 有权
标题翻译：用于估计网络路由器之间的延迟和抖动的装置
公开(公告)号：US07111073B1
公开(公告)日：2006-09-19
申请号：US09583177
申请日：2000-05-30
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： G06F15/173 , G06F11/00 , G01R31/08 , H04J1/16 , H04L12/26
CPC分类号： H04L45/121
摘要： A delay measurement technique according to an embodiment according to the present invention is based on the precept, ascertained by the inventors, that a link between network nodes will often contribute to the delay encountered between several different pairs of network nodes. Such a technique identifies the path between each pair of nodes by a list of links that form the path. Paths that are orthogonal are treated as being necessary for describing the delays encountered between nodes, and, once the requisite set of orthogonal paths has been derived, all other paths can be described in terms of one or more of these orthogonal paths. Such a technique also lends itself to matrix representation of the paths, and the use of matrix manipulation techniques in deriving delay and jitter.
摘要翻译：根据本发明的实施例的延迟测量技术基于由发明人确定的规则，网络节点之间的链路通常将有助于在几个不同的网络节点对之间遇到的延迟。这种技术通过形成路径的链接列表来识别每对节点之间的路径。正交的路径被视为描述在节点之间遇到的延迟所必需的，并且一旦已经导出必需的正交路径集合，就可以用这些正交路径中的一个或多个来描述所有其他路径。这种技术也适用于路径的矩阵表示，以及使用矩阵操纵技术来推导延迟和抖动。

7. 发明授权

US06751746B1 Method and apparatus for uninterrupted packet transfer using replication over disjoint paths 有权
标题翻译：用于通过不相交路径进行复制的不间断数据包传输的方法和装置
公开(公告)号：US06751746B1
公开(公告)日：2004-06-15
申请号：US09629585
申请日：2000-07-31
申请人： Bijendra N. Jain , Keith McCloghrie
发明人： Bijendra N. Jain , Keith McCloghrie
IPC分类号： H02H305
CPC分类号： H04L45/28 , H04L45/00 , H04L45/24
摘要： A method of operating a fault tolerant connection in a network is described. The network includes a number of network elements and a number of links. Each of the network elements is coupled to at least one other of the network elements by at least one of the links. The method identifies a first path and a second path. The first path is between a first one of the network elements and a second one of the network elements, as is the second path. Moreover, the first path and the second path are disjoint. This disjointedness can be any difference between the two paths (e.g., any combination of different network elements or links). A packet is sent from the first one of the network elements via the first path, while a duplicate packet is sent from the first one of the network elements via the second path. The duplicate packet is a duplicate of the packet. Once these packets have been sent, at least one of the packet and the duplicate packet are received at the second one of the network elements. If both the packet and the duplicate packet are received at the second one of the network elements, one of the two is discarded (e.g., by simply ignoring the last one received).
摘要翻译：描述了在网络中操作容错连接的方法。该网络包括多个网络元件和多个链路。每个网络元件通过链路中的至少一个耦合到网络元件中的至少另一个。该方法识别第一路径和第二路径。第一路径在网络元件中的第一路径和网络元件中的第二路径之间，和第二路径一样。此外，第一路径和第二路径是不相交的。这种不相容性可以是两个路径之间的任何差异（例如，不同网络元件或链路的任何组合）。经由第一路径从第一网络元件发送分组，同时经由第二路径从第一网络单元发送重复分组。重复的数据包是数据包的副本。一旦这些分组被发送，则在第二个网络单元中接收到分组和重复分组中的至少一个。如果在第二个网络元件处接收到分组和重复分组，则丢弃两个分组中的一个（例如，通过简单地忽略所接收的最后一个）。

8. 发明授权

US08266088B2 Tracking policy decisions in a network 有权
标题翻译：跟踪网络中的策略决策
公开(公告)号：US08266088B2
公开(公告)日：2012-09-11
申请号：US12481519
申请日：2009-06-09
申请人： L. Alexander Clemm , Kaushik Narayan , Keith McCloghrie
发明人： L. Alexander Clemm , Kaushik Narayan , Keith McCloghrie
IPC分类号： G06N5/02 , G06F17/00
CPC分类号： H04L47/70
摘要： An apparatus is disclosed for creating and storing policy data records comprising data identifying network policy decisions. After a data packet is received, a network policy decision is made based on information in the packet and one or more network policies. A policy data record identifying the network policy decision is created, and the policy data record is stored.
摘要翻译：公开了一种用于创建和存储包括识别网络策略决定的数据的策略数据记录的装置。在接收到数据分组之后，基于分组中的信息和一个或多个网络策略进行网络策略决定。创建标识网络策略决策的策略数据记录，并存储策略数据记录。

9. 发明授权

US07428237B1 Fast convergence with topology switching 有权
标题翻译：与拓扑切换快速收敛
公开(公告)号：US07428237B1
公开(公告)日：2008-09-23
申请号：US10752341
申请日：2004-01-06
申请人： Silvano Gai , Keith McCloghrie , Merwyn B. Andrade
发明人： Silvano Gai , Keith McCloghrie , Merwyn B. Andrade
IPC分类号： H04L12/28 , H04L12/56 , H04L12/26 , G06F15/16 , G06F15/173
CPC分类号： H04L12/462 , H04L12/4641 , H04L12/465 , H04L41/06 , H04L41/0663
摘要： A system for rapidly switching at least one virtual local area network (VLAN) from a first loop-free topology to a second loop-free topology in response to a failure within the first loop-free topology. Each VLAN has one “logical” VLAN which represents the network entities organized into the VLAN and a set of “physical” VLANs each having its own VLAN designation. For each physical VLAN, a different loop-free topology is defined, although only one physical VLAN is “active” at any given time. Messages associated with the logical VLAN are tagged with the designation of the currently active physical VLAN, and forwarded along its loop-free topology. Upon detecting a failure in the loop-free topology, the logical VLAN is rapidly switched to the loop-free topology defined by a second, back-up physical VLAN. Following the switch, messages associated with the logical VLAN are tagged with the designation of this back-up VLAN and are forwarded along its loop-free topology.
摘要翻译：用于响应于第一无环路拓扑中的故障，将至少一个虚拟局域网（VLAN）从第一环无拓扑拓扑快速切换到第二无环路拓扑的系统。每个VLAN都有一个“逻辑”VLAN，它表示组织在VLAN中的网络实体和一组“物理”VLAN，每个VLAN都有自己的VLAN名称。对于每个物理VLAN，定义了不同的无环路拓扑，尽管在任何给定时间只有一个物理VLAN“活动”。与逻辑VLAN相关联的消息被标记为当前活动的物理VLAN的指定，并沿其无环路拓扑转发。检测到无环路拓扑故障时，逻辑VLAN将迅速切换到第二个备份物理VLAN所定义的无环路拓扑。切换后，与逻辑VLAN相关联的消息将被标记为该备份VLAN的指定，并沿其无环路拓扑转发。

10. 发明授权

US07275094B1 System and method for configuring contents of network management notifications 有权
标题翻译：配置网络管理通知内容的系统和方法
公开(公告)号：US07275094B1
公开(公告)日：2007-09-25
申请号：US09748758
申请日：2000-12-21
申请人： Keith McCloghrie , Ramanathan Kavasseri , Sandra Durham
发明人： Keith McCloghrie , Ramanathan Kavasseri , Sandra Durham
IPC分类号： G06F15/173 , G06F13/00
CPC分类号： H04L41/0681 , H04L41/0686
摘要： A method for configuring contents of a network management notification includes receiving at a management station a list of notifications supported by an agent and sending a message to the agent specifying objects for each of the notifications. A notification containing the specified objects is received at the management station upon the occurrence of an event.
摘要翻译：一种用于配置网络管理通知的内容的方法包括在管理站处接收由代理支持的通知的列表，并向代理发送消息以指定每个通知的对象。在发生事件时，管理站收到包含指定对象的通知。

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