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1. 发明申请

US20120008635A1 SYSTEM AND METHOD FOR PROVIDING NETWORK ROUTE REDUNDANCY ACROSS LAYER 2 DEVICES 有权
标题翻译：用于提供网络路由冗余的系统和方法通过层2设备
公开(公告)号：US20120008635A1
公开(公告)日：2012-01-12
申请号：US13185885
申请日：2011-07-19
申请人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
发明人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
IPC分类号： H04L12/56
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译：描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用多个冗余控制分组。该系统还包括允许冗余控制分组通过第2层网络淹没的装置。该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。

2. 发明授权

US06717922B2 Network configuration protocol and method for rapid traffic recovery and loop avoidance in ring topologies 失效
标题翻译：环形拓扑中快速流量恢复和回路避免的网络配置协议和方法
公开(公告)号：US06717922B2
公开(公告)日：2004-04-06
申请号：US10090669
申请日：2002-03-04
申请人： Ivy Pei-Shan Hsu , Rajkumar Jalan , Gurudeep Kamat , Andrew Tai-Chin Kuo , Jordi Moncada-Elias
发明人： Ivy Pei-Shan Hsu , Rajkumar Jalan , Gurudeep Kamat , Andrew Tai-Chin Kuo , Jordi Moncada-Elias
IPC分类号： H04L1228
CPC分类号： H04L45/00 , H04L12/437 , H04L45/18
摘要： A network configuration protocol and algorithm are described which resolve deficiencies with existing protocols. A large network having many bridges may be built as a combination of smaller networks, many of which may each be arranged in a ring topology. Each ring may be monitored by a single master bridge regularly sending control packets, and each other bridge in the ring does not make decisions with respect to its status. A loop free topology is achieved by selectively blocking and unblocking data traffic in one of the ring ports of the single master bridge for the ring, while all other bridges in the ring keep their ports in non-blocked states. In multiple ring topologies, each ring has a single master bridge which chooses one of its ports to be blocking. When rings are connected through a shared link formed between two shared bridges, rings with higher priorities carry control packets of rings with lower priorities so that, in case of failure of the shared link, a single ring may be formed from the connected rings with only the master bridge of the higher priority ring aware of and monitoring the larger ring. In case of any link failure inside a given ring, the master bridge quickly detects the failure and automatically changes its blocking port to a non-blocking state in which traffic may flow and follow an alternate path, avoiding the failed link.
摘要翻译：描述了一种解决现有协议缺陷的网络配置协议和算法。可以将具有许多桥的大型网络构建为较小网络的组合，其中许多网络可以各自布置在环形拓扑中。每个环可以由单个主桥监控，定期发送控制分组，并且环中的每个其他桥不相对于其状态做出决定。通过选择性地阻塞和解除阻塞环中单个主桥的一个环形端口中的数据流量，环路中的所有其他网桥将其端口保持为非阻塞状态，实现无环路拓扑。在多环拓扑中，每个环都有一个主桥，它选择一个端口阻塞。当环路通过两个共享网桥之间形成的共享链路连接时，具有较高优先级的环路可以承载具有较低优先级的环的控制分组，以便在共享链路发生故障的情况下，可以仅从连接的环形成单个环较高优先级的主桥知道并监视较大的环。在给定环中发生任何链路故障的情况下，主桥快速检测到故障，并自动将其阻塞端口更改为流量可能流动并遵循备用路径的非阻塞状态，避免了故障链路。

3. 发明授权

US08593987B2 System and method for providing network route redundancy across layer 2 devices 有权
公开(公告)号：US08593987B2
公开(公告)日：2013-11-26
申请号：US13185885
申请日：2011-07-19
申请人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
发明人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
IPC分类号： H04L12/28 , H04J1/16
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.

4. 发明授权

US08014301B2 System and method for providing network route redundancy across layer 2 devices 有权
标题翻译：在第2层设备上提供网络路由冗余的系统和方法
公开(公告)号：US08014301B2
公开(公告)日：2011-09-06
申请号：US12477069
申请日：2009-06-02
申请人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
发明人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
IPC分类号： H04L12/56 , H04J1/16
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译：描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用多个冗余控制分组。该系统还包括允许冗余控制分组通过第2层网络淹没的装置。该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。

5. 发明授权

US08462668B2 System and method for implementation of layer 2 redundancy protocols across multiple networks 有权
公开(公告)号：US08462668B2
公开(公告)日：2013-06-11
申请号：US10261946
申请日：2002-10-01
申请人： Andrew Tai-Chin Kuo , Gurudeep Kamat , Jordi Moncada-Elias , Ivy Pei-Shan Hsu , Rajkumar Jalan
发明人： Andrew Tai-Chin Kuo , Gurudeep Kamat , Jordi Moncada-Elias , Ivy Pei-Shan Hsu , Rajkumar Jalan
IPC分类号： H04L12/28
CPC分类号： H04L45/74 , H04L12/66
摘要： The system, method, and article of manufacture of the present invention allows multiple customers connected to a common external network to each implement a layer 2 redundancy protocol, such as the spanning tree protocol, in order to prevent layer 2 loops. Accordingly, a method is presented for providing an independent loop free layer 2 topology between a external network and a customer network comprising tagging control packets originating on the customer network with a unique identifier and tunneling the control packets received from the customer network between a plurality of boundary interface devices at the external network such that the control packets are routed back to the customer network based on the presence of the unique identifier in the control packet. The layer 2 redundancy protocol on the customer network converges based at least in part on the presence of control packets appearing on more than one port on the customer network.

6. 发明授权

US07558195B1 System and method for providing network route redundancy across layer 2 devices 有权
标题翻译：在第2层设备上提供网络路由冗余的系统和方法
公开(公告)号：US07558195B1
公开(公告)日：2009-07-07
申请号：US11695458
申请日：2007-04-02
申请人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
发明人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Rajkumar Jalan , Gurudeep Kamat
IPC分类号： H04J1/16 , H04L12/56
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译：描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用多个冗余控制分组。该系统还包括允许冗余控制分组通过第2层网络淹没的装置。该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。

7. 发明申请

US20090274153A1 System and method for implementation of layer 2 redundancy protocols across multiple networks 有权
标题翻译：跨多个网络实施第2层冗余协议的系统和方法
公开(公告)号：US20090274153A1
公开(公告)日：2009-11-05
申请号：US10261946
申请日：2002-10-01
申请人： Andrew Tai-Chin Kuo , Gurudeep Kamat , Jordi Moncada-Elias , Ivy Pei-Shan Hsu , Rajkumar Jalan
发明人： Andrew Tai-Chin Kuo , Gurudeep Kamat , Jordi Moncada-Elias , Ivy Pei-Shan Hsu , Rajkumar Jalan
IPC分类号： H04L12/56
CPC分类号： H04L45/74 , H04L12/66
摘要： The system, method, and article of manufacture of the present invention allows multiple customers connected to a common external network to each implement a layer 2 redundancy protocol, such as the spanning tree protocol, in order to prevent layer 2 loops. Accordingly, a method is presented for providing an independent loop free layer 2 topology between a external network and a customer network comprising tagging control packets originating on the customer network with a unique identifier and tunneling the control packets received from the customer network between a plurality of boundary interface devices at the external network such that the control packets are routed back to the customer network based on the presence of the unique identifier in the control packet. The layer 2 redundancy protocol on the customer network converges based at least in part on the presence of control packets appearing on more than one port on the customer network.
摘要翻译：本发明的系统，方法和制品允许连接到公共外部网络的多个客户各自实现诸如生成树协议之类的第二层冗余协议，以便防止第二层环路。因此，提出了一种用于在外部网络和客户网络之间提供独立的循环自由层2拓扑的方法，包括使用唯一标识符标记来自客户网络的控制分组，并且在多个边界接口设备，使得控制分组基于控制分组中唯一标识符的存在被路由回客户网络。客户网络上的第2层冗余协议至少部分地基于出现在客户网络上的多个端口上的控制分组的存在来收敛。

8. 发明授权

US07209435B1 System and method for providing network route redundancy across Layer 2 devices 有权
标题翻译：在第2层设备上提供网络路由冗余的系统和方法
公开(公告)号：US07209435B1
公开(公告)日：2007-04-24
申请号：US10124449
申请日：2002-04-16
申请人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Raikumar Jalan , Gurudeep Kamat
发明人： Andrew Tai-Chin Kuo , Ivy Pei-Shan Hsu , Jordi Moncada-Elias , Raikumar Jalan , Gurudeep Kamat
IPC分类号： H04J1/16
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译：描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用多个冗余控制分组。该系统还包括允许冗余控制分组通过第2层网络淹没的装置。该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。

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