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1. 发明授权

US06762675B1 Method and apparatus for remote powering of device connected to network 有权
标题翻译：连接到网络的设备的远程供电方法和装置
公开(公告)号：US06762675B1
公开(公告)日：2004-07-13
申请号：US09406248
申请日：1999-09-27
申请人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
发明人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
IPC分类号： H04Q522
CPC分类号： H04L12/10 , G06F1/266 , H04L49/30 , H04L49/40 , H04M3/18 , H04M7/006
摘要： A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要翻译：网络节点确定耦合设备在实际为其供电之前进行远程线路供电的适用性。节点扫描其端口以确定哪些端口耦合到设备。然后节点询问耦合的设备。生成独特的发现音或位模式并将其发送到耦合到端口的设备。然后该节点监视端口的返回信号。如果有返回信号，则将其与发送的发现信号进行比较。如果耦合器件适用于远程线路供电，信号将允许线路损耗相同。如果比较产生匹配，则网络节点向设备提供远程线路电源。

2. 发明授权

US07821379B2 Method and apparatus for remote powering of device connected to network 有权
标题翻译：连接到网络的设备的远程供电方法和装置
公开(公告)号：US07821379B2
公开(公告)日：2010-10-26
申请号：US11755542
申请日：2007-05-30
申请人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
发明人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
IPC分类号： G05B11/01
CPC分类号： H04L12/10 , H04M19/08
摘要： A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要翻译：网络节点确定耦合设备在实际为其供电之前进行远程线路供电的适用性。节点扫描其端口以确定哪些端口耦合到设备。然后节点询问耦合的设备。生成独特的发现音或位模式并将其发送到耦合到端口的设备。然后该节点监视端口的返回信号。如果有返回信号，则将其与发送的发现信号进行比较。如果耦合器件适用于远程线路供电，信号将允许线路损耗相同。如果比较产生匹配，则网络节点向设备提供远程线路电源。

3. 发明申请

US20070222562A1 METHOD AND APPARATUS FOR REMOTE POWERING OF DEVICE CONNECTED TO NETWORK 有权
标题翻译：用于远程连接到网络的设备的方法和装置
公开(公告)号：US20070222562A1
公开(公告)日：2007-09-27
申请号：US11755542
申请日：2007-05-30
申请人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
发明人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
IPC分类号： H04Q5/22
CPC分类号： H04L12/10 , H04M19/08
摘要： A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要翻译：网络节点确定耦合设备在实际为其供电之前进行远程线路供电的适用性。节点扫描其端口以确定哪些端口耦合到设备。然后节点询问耦合的设备。生成独特的发现音或位模式并将其发送到耦合到端口的设备。然后该节点监视端口的返回信号。如果有返回信号，则将其与发送的发现信号进行比较。如果耦合器件适用于远程线路供电，信号将允许线路损耗相同。如果比较产生匹配，则网络节点向设备提供远程线路电源。

4. 发明授权

US07256684B1 Method and apparatus for remote powering of device connected to network 有权
标题翻译：连接到网络的设备的远程供电方法和装置
公开(公告)号：US07256684B1
公开(公告)日：2007-08-14
申请号：US10836923
申请日：2004-04-29
申请人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
发明人： Luca Cafiero , Maurilio De Nicolo , Thomas Edsall , Karl Nakamura , Soei-Shin Hang
IPC分类号： G05B11/01 , H04M19/00 , G05B23/02
CPC分类号： H04L12/10 , H04M19/08
摘要： A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要翻译：网络节点确定耦合设备在实际为其供电之前进行远程线路供电的适用性。节点扫描其端口以确定哪些端口耦合到设备。然后节点询问耦合的设备。生成独特的发现音或位模式并将其发送到耦合到端口的设备。然后该节点监视端口的返回信号。如果有返回信号，则将其与发送的发现信号进行比较。如果耦合器件适用于远程线路供电，信号将允许线路损耗相同。如果比较产生匹配，则网络节点向设备提供远程线路电源。

5. 发明授权

US08531991B2 Multi-chassis emulated switch 有权
标题翻译：多机箱仿真开关
公开(公告)号：US08531991B2
公开(公告)日：2013-09-10
申请号：US11582194
申请日：2006-10-16
申请人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
发明人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
IPC分类号： H04L12/28 , H04L12/413 , G01R31/08
CPC分类号： H04L12/462 , H04L45/00 , H04L45/245 , H04L45/48 , H04L45/586 , H04L47/125 , H04L49/351 , H04L49/70
摘要： A solution is provided wherein the interfaces between multiple chassis (e.g., edge switches) in a network of layer 2 devices and a spanning tree device are treated as a single emulated switch. This emulated switch effectively enables two different views to the two different sides. Thus, frames from the network of layer 2 switches destined to any port of the emulated switch may take any of the links (through any of the physical switches), thereby enabling effective load-balancing for frames traveling from the layer 2 network side into the spanning tree device. Meanwhile the spanning tree device does not recognize an illegal loop in its connection to two different edge switches as it views the two links as a single logical EtherChannel.
摘要翻译：提供了一种解决方案，其中层2设备的网络中的多个机箱（例如，边缘交换机）与生成树设备之间的接口被视为单个仿真开关。该模拟开关有效地实现了两个不同的视图。因此，去往模拟交换机的任何端口的第二层交换机的网络的帧可以采用任何链路（通过任何物理交换机），从而使得从第2层网络侧行进到帧的帧能够进行有效的负载平衡生成树设备。同时，生成树设备在将两个链路视为单个逻辑以太通道时，不识别其连接到两个不同边缘交换机的非法回路。

6. 发明申请

US20080089247A1 Multi-chassis emulated switch 有权
标题翻译：多机箱仿真开关
公开(公告)号：US20080089247A1
公开(公告)日：2008-04-17
申请号：US11582194
申请日：2006-10-16
申请人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
发明人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
IPC分类号： H04L12/28
CPC分类号： H04L12/462 , H04L45/00 , H04L45/245 , H04L45/48 , H04L45/586 , H04L47/125 , H04L49/351 , H04L49/70
摘要： A solution is provided wherein the interfaces between multiple chassis (e.g., edge switches) in a network of layer 2 devices and a spanning tree device are treated as a single emulated switch. This emulated switch effectively enables two different views to the two different sides. Thus, frames from the network of layer 2 switches destined to any port of the emulated switch may take any of the links (through any of the physical switches), thereby enabling effective load-balancing for frames traveling from the layer 2 network side into the spanning tree device. Meanwhile the spanning tree device does not recognize an illegal loop in its connection to two different edge switches as it views the two links as a single logical EtherChannel.
摘要翻译：提供了一种解决方案，其中层2设备的网络中的多个机箱（例如，边缘交换机）与生成树设备之间的接口被视为单个仿真开关。该模拟开关有效地实现了两个不同的视图。因此，去往模拟交换机的任何端口的第二层交换机的网络的帧可以采用任何链路（通过任何物理交换机），从而使得从第2层网络侧行进到帧的帧能够进行有效的负载平衡生成树设备。同时，生成树设备在将两个链路视为单个逻辑以太通道时，不识别其连接到两个不同边缘交换机的非法回路。

7. 发明授权

US06266705B1 Look up mechanism and associated hash table for a network switch 有权
标题翻译：查找网络交换机的机制和关联的哈希表
公开(公告)号：US06266705B1
公开(公告)日：2001-07-24
申请号：US09162730
申请日：1998-09-29
申请人： Daniel Ullum , Thomas J. Edsall , Soei-Shin Hang
发明人： Daniel Ullum , Thomas J. Edsall , Soei-Shin Hang
IPC分类号： G06F15173
CPC分类号： H04L12/467 , H04L12/4675 , H04L45/00 , H04L45/745
摘要： An improved look up mechanism for accessing a RAM to obtain forwarding information for data frames being transported among ports of a high-performance switch is provided. The look up mechanism includes a multi-page look up table and associated hashing technique. A media access control (MAC) address and a virtual local area network (VLAN) identifier are transformed with a hash function to obtain a hash key. The hash key is an address pointing to a particular entry in the look up table. A virtual first page is also derived from the hash key, which selects a particular physical page of the look up table to be initially accessed each time that MAC address/VLAN pair is used. The look up mechanism may also be used to access a short cut table containing Layer 3 short cut information. In either case, ultimately, the likelihood is increased that a match will be found on the first RAM access, thus maintaining high-speed switch performance.
摘要翻译：提供了一种用于访问RAM以获得在高性能交换机的端口之间传输的数据帧的转发信息的改进的查找机制。查找机制包括多页查找表和相关联的散列技术。媒体访问控制（MAC）地址和虚拟局域网（VLAN）标识符通过散列函数进行变换以获得散列密钥。哈希密钥是指向查找表中特定条目的地址。还从散列密钥派生虚拟第一页，该密钥选择每次使用MAC地址/ VLAN对时最初访问的查找表的特定物理页。查找机制也可用于访问包含第3层快捷方式信息的快捷表。在这两种情况下，最终增加了在第一RAM访问中发现匹配的可能性，从而保持高速开关性能。

8. 发明授权

US06457058B1 Network switch with hash table look up 有权
标题翻译：网络交换机与哈希表查找
公开(公告)号：US06457058B1
公开(公告)日：2002-09-24
申请号：US09904431
申请日：2001-07-12
申请人： Daniel Ullum , Thomas J. Edsall , Soei-Shin Hang
发明人： Daniel Ullum , Thomas J. Edsall , Soei-Shin Hang
IPC分类号： G06F15173
CPC分类号： H04L12/467 , H04L12/4675 , H04L45/00 , H04L45/745
摘要： An improved look up mechanism for accessing a RAM to obtain forwarding information for data frames being transported among ports of a high-performance switch is provided. The look up mechanism includes a multi-page look up table and associated hashing technique. A media access control (MAC) address and a virtual local area network (VLAN) identifier are transformed with a hash function to obtain a hash key. The hash key is an address pointing to a particular entry in the look up table. A virtual first page is also derived from the hash key, which selects a particular physical page of the look up table to be initially accessed each time that MAC address/VLAN pair is used. The look up mechanism may also be used to access a short cut table containing Layer 3 short cut information. In either case, ultimately, the likelihood is increased that a match will be found on the first RAM access, thus maintaining high-speed switch performance.
摘要翻译：提供了一种用于访问RAM以获得在高性能交换机的端口之间传输的数据帧的转发信息的改进的查找机制。查找机制包括多页查找表和相关联的散列技术。媒体访问控制（MAC）地址和虚拟局域网（VLAN）标识符通过散列函数进行变换以获得散列密钥。哈希密钥是指向查找表中特定条目的地址。还从散列密钥派生虚拟第一页，该密钥选择每次使用MAC地址/ VLAN对时最初访问的查找表的特定物理页。查找机制也可用于访问包含第3层快捷方式信息的快捷表。在这两种情况下，最终增加了在第一RAM访问中发现匹配的可能性，从而保持高速开关性能。

9. 发明授权

US06831898B1 Multiple packet paths to improve reliability in an IP network 失效
标题翻译：多个分组路径，以提高IP网络的可靠性
公开(公告)号：US06831898B1
公开(公告)日：2004-12-14
申请号：US09593566
申请日：2000-08-16
申请人： Thomas J. Edsall , Silvano Gai , Soei-Shin Hang
发明人： Thomas J. Edsall , Silvano Gai , Soei-Shin Hang
IPC分类号： H04L1228
CPC分类号： H04L47/34 , H04L45/00 , H04L45/16 , H04L45/24 , H04L45/28 , H04L47/2416
摘要： The invention replicates a packet requiring high availability and transmits it from two or more ports of a switch, for example a wiring closet Layer 2 switch. The parent packet carries a unique sequence number. The copies of the packet each carry the parent packet's unique sequence number. Each copy of the packet then travels on separate pathways through routers (Layer 3 network devices). The pathways are maintained separate by assigning high costs in a LSP routing sense to links connecting the two paths, and by assigning low costs to links along the desired paths. The two identical packets converge on the destination station. The destination station accepts the first packet with a particular sequence number, and discards any later packets with the same sequence number. In the event that a link in one path has a catastrophic failure, then the packet travelling along the other path reaches the destination station and service remains operative without interruption. The lost path is then recomputed by the a router (if any) still receiving the lost packet. A new non-converging path may be selected if any are available, depending upon the topology. After the disruption is repaired, the original dual pathways may once again be established.
摘要翻译：本发明复制了需要高可用性的分组，并将其从交换机的两个或更多个端口（例如配线柜第2层交换机）发送。父包携带唯一的序列号。分组的副本每个携带父分组的唯一序列号。然后，数据包的每个副本通过路由器（第3层网络设备）在不同的路径上传播。通过将LSP路由意义中的高成本分配给连接两个路径的链路以及通过沿着期望路径为链路分配低成本来维持路径。两个相同的数据包收敛在目的站。目的站接收具有特定序列号的第一个分组，并丢弃具有相同序列号的任何后续分组。在一条路径中的链路发生灾难性故障的情况下，沿着另一路径行进的分组到达目的站，并且服务保持无间断的运行。丢失的路径然后被路由器（如果有的话）重新计算，仍然收到丢失的数据包。根据拓扑结构，可以选择新的非会聚路径（如果有）。破坏后修复，原来的双重路径可能再次成立。

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