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11. 发明授权

US07739403B1 Synchronizing state information between control units 有权
标题翻译：同步控制单元之间的状态信息
公开(公告)号：US07739403B1
公开(公告)日：2010-06-15
申请号：US10678280
申请日：2003-10-03
申请人： Raghunath Balakrishna , Shine-chu Wang , Umesh Krishnaswamy , Bharani Chadalavada , Sandeep Kumar , Raj Tuplur , Rajagopalan Sivaramakrishnan
发明人： Raghunath Balakrishna , Shine-chu Wang , Umesh Krishnaswamy , Bharani Chadalavada , Sandeep Kumar , Raj Tuplur , Rajagopalan Sivaramakrishnan
IPC分类号： G06F15/173 , G06F11/00
CPC分类号： G06F11/2097 , G06F11/2038 , H04L12/66
摘要： Techniques are described for synchronizing state information between a plurality of control units. A router, for example, is described that includes a primary control unit and a standby control unit. The primary control unit maintains router resources to ensure operation of the router. To ensure operation, the primary control unit receives state information from the router resources and maintains the state information for consumers, i.e. router resources that require or “consume” state information. Prior to updating the consumers with the state information, the primary control unit synchronizes the state information with the standby control unit. In the event the primary control unit fails, the standby control unit assumes control of the router resources. Upon assuming control, the standby control unit resumes updating the consumers with state information without having to “relearn” state information, e.g., by way of power cycling the router resources to a known state.
摘要翻译：描述了用于使多个控制单元之间的状态信息同步的技术。描述了路由器，其包括主控制单元和备用控制单元。主控单元维护路由器资源，确保路由器的运行。为了确保操作，主控制单元从路由器资源接收状态信息并维护消费者的状态信息，即需要或“消耗”状态信息的路由器资源。在使用状态信息更新消费者之前，主控制单元将状态信息与待机控制单元同步。在主控单元发生故障的情况下，备用控制单元承担路由器资源的控制。在进行控制时，备用控制单元通过状态信息恢复消费者的更新，而不必例如通过将路由器资源的功率循环到已知状态来“重新学习”状态信息。

12. 发明授权

US07518986B1 Push-based hierarchical state propagation within a multi-chassis network device 有权
标题翻译：多机箱网络设备内基于推送式的分层状态传播
公开(公告)号：US07518986B1
公开(公告)日：2009-04-14
申请号：US11280887
申请日：2005-11-16
申请人： Bharani Chadalavada , Umesh Krishnaswamy , Raj Tuplur
发明人： Bharani Chadalavada , Umesh Krishnaswamy , Raj Tuplur
IPC分类号： G08C15/00
CPC分类号： H04L45/00 , H04L45/58 , H04L45/60
摘要： A multi-chassis network device sends state information to internal consumers within the multi-chassis device via a hierarchical distribution. As one example, a primary master routing engine within a control node of a multi-chassis router forwards state information to local routing engines within other chassis, which in turn distribute the state information to consumers on each chassis. Each local routing engine defers sending acknowledgement to the master routing engine until acknowledgements have been received from all consumers serviced by the local routing engine. Embodiments of the invention may reduce control plane data traffic and convergence times associated with distribution of state updates in the multi-chassis network device.
摘要翻译：多机箱网络设备通过分层分发向多机箱设备内的内部消费者发送状态信息。作为一个示例，多机架路由器的控制节点内的主要主路由引擎将状态信息转发到其他机箱内的本地路由引擎，而另一个机箱又将状态信息分配给每个机箱上的消费者。每个本地路由引擎将发送确认发送到主路由引擎，直到从本地路由引擎所服务的所有消费者接收到确认。本发明的实施例可以减少与多机箱网络设备中的状态更新的分配相关联的控制平面数据流量和收敛时间。

13. 发明授权

US07509399B1 Programmable communication interface 有权
标题翻译：可编程通讯接口
公开(公告)号：US07509399B1
公开(公告)日：2009-03-24
申请号：US10431750
申请日：2003-05-08
申请人： Barun Kar , Troy M Sheets , Truman Joe , Bharani Chadalavada , Geetha Ramaian
发明人： Barun Kar , Troy M Sheets , Truman Joe , Bharani Chadalavada , Geetha Ramaian
IPC分类号： G06F15/177
CPC分类号： G06F13/385
摘要： A device comprises a programmable communication interface and a processor. The programmable communication interface communicates data via a set of signals. The processor configures the programmable communication interface to communicate the data in accordance with a programmed override state for at least one of the signals and actual states for the remaining signals. The programmable communication interface may be configured, for example, to programmably treat an overridden signal as asserted or de-asserted regardless of actual voltages present on one or more electrical connectors associated with the overridden signal. As a result, incorrectly wired electrical connectors of the programmable communication interface may be programmably overridden. Consequently, a technician need not manually rewire the programmable communication interface.
摘要翻译：一种设备包括可编程通信接口和处理器。可编程通信接口通过一组信号传送数据。处理器配置可编程通信接口以根据针对剩余信号的信号和实际状态中的至少一个的编程覆盖状态来传送数据。例如，可编程通信接口可以被配置为可以可编程地将覆盖的信号视为被断言或取消断言，而不管存在于与重写信号相关联的一个或多个电连接器上的实际电压。结果，可编程通信接口的不正确连接的电连接器可以被可编程地覆盖。因此，技术人员不需要手动重新连接可编程通信接口。

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