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1.发明授权公开(公告)号：US07516202B2
公开(公告)日：2009-04-07
申请号：US10192663
申请日：2002-07-10
申请人： Ken Yu , Ramasamy Jesuraj , Arun Kudur , Shang Chang
发明人： Ken Yu , Ramasamy Jesuraj , Arun Kudur , Shang Chang
IPC分类号： G06F15/173 , G06F15/16
CPC分类号： H04L45/00 , H04L41/0663 , H04L43/0817 , H04L45/28 , H04L45/586
摘要： A critical interface may be defined for a network device such that if the critical interface goes DOWN, the network device will perform a forced failover. IP addresses are assigned to interface groups, and interface groups are assigned to a critical interface. The critical interface will go DOWN if any one of the interface groups goes DOWN. The interface groups will not go DOWN, however, unless all members' IP addresses assigned to the interface group go DOWN. By configuring the critical interface in this manner, the network manager has increased flexibility in defining which events should and should not trigger failover of the network device. Additionally, combinations of events may be grouped to enable the network manager to take into account fairly complex failure scenarios and specify, with precision, the action to be taken by the network device under myriad possible situations.
摘要翻译： 可以为网络设备定义关键接口，使得如果关键接口掉电，则网络设备将执行强制故障转移。 IP地址分配给接口组，接口组分配到关键接口。 如果任何一个接口组关闭，关键接口将关闭。 但是，除非分配给接口组的所有成员的IP地址都处于DOWN状态，否则接口组不会下降。 通过以这种方式配置关键接口，网络管理员在定义哪些事件应该和不应该触发网络设备的故障切换时增加了灵活性。 此外，事件的组合可以被分组以使得网络管理者能够考虑到相当复杂的故障场景，并精确地指定网络设备在各种可能情况下采取的动作。
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公开(公告)号：US20080089234A1
公开(公告)日：2008-04-17
申请号：US11549708
申请日：2006-10-16
申请人： Janet Doong , Arun Kudur , Harish Sankaran
发明人： Janet Doong , Arun Kudur , Harish Sankaran
摘要： Described are a method and a device for efficiently switching multicast data flows from a shared distribution tree to a shortest path distribution tree. The method achieves an efficient and scalable tree switch that reduces the latency of multicast data transmitted from the source to receivers. A determination is made for each source group (S,G) entry in a portion of a forwarding plane database of a router as to whether a byte count for that entry exceeds a threshold value. A message sent from the forwarding plane to the router control plane indicates the (S,G) entries determined to have byte counts exceeding the respective threshold values. For each message entry, the respective shared distribution tree is switched to a shortest path distribution tree. The method achieves a substantial reduction in the number of inter-process messages exchanged between the control plane and the forwarding plane compared to conventional tree switchover techniques.
摘要翻译： 描述了用于有效地将组播数据流从共享分发树切换到最短路径分布树的方法和设备。 该方法实现了一种高效且可扩展的树形交换机，可以减少从源向接收方发送的组播数据的延迟。 对于路由器的转发平面数据库的一部分中的每个源组（S，G）条目，确定该条目的字节计数是否超过阈值。 从转发平面发送到路由器控制平面的消息指示（S，G）条目被确定为具有超过相应阈值的字节计数。 对于每个消息条目，相应的共享分发树被切换到最短路径分布树。 与常规树切换技术相比，该方法实现了在控制平面和转发平面之间交换的处理间消息的数量的显着减少。
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公开(公告)号：US20070280231A1
公开(公告)日：2007-12-06
申请号：US11422440
申请日：2006-06-06
申请人： Harish Sankaran , Janet Doong , Arun Kudur
发明人： Harish Sankaran , Janet Doong , Arun Kudur
IPC分类号： H04L12/56
摘要： Safe and efficient passing of information from a forwarding-plane to a control-plane is provided. The information can be passed from a forwarding-plane process to a control-plane process without having to modify the control-plane process and without requiring the processes to pass information via shared memory. The information is encoded in the forwarding-plane process. The encoded information is passed to the operating system, wherein the operating system interprets the encoded information and reports the information to the control plane process. The present invention can be advantageously utilized in passing multicast events from a forwarding-plane process to a control-plane process. Multicast events can be passed from a forwarding-plane process to a control-plane process without having to modify the control-plane process and without requiring the processes to pass messages via shared memory.
摘要翻译： 提供从转发平面到控制平面的安全高效的信息传递。 信息可以从转发平面进程传递到控制平面进程，而不必修改控制平面进程，而不需要进程通过共享内存传递信息。 信息在转发平面过程中进行编码。 编码的信息被传递到操作系统，其中操作系统解释编码的信息并将信息报告给控制平面过程。 本发明可以有利地用于将组播事件从转发平面过程传递到控制平面过程。 组播事件可以从转发平面进程传递到控制平面进程，而无需修改控制平面进程，而不需要进程通过共享内存传递消息。
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公开(公告)号：US08010696B2
公开(公告)日：2011-08-30
申请号：US11422440
申请日：2006-06-06
申请人： Harish Sankaran , Janet Doong , Arun Kudur
发明人： Harish Sankaran , Janet Doong , Arun Kudur
IPC分类号： H06F15/16
摘要： Safe and efficient passing of information from a forwarding-plane to a control-plane is provided. The information can be passed from a forwarding-plane process to a control-plane process without having to modify the control-plane process and without requiring the processes to pass information via shared memory. The information is encoded in the forwarding-plane process. The encoded information is passed to the operating system, wherein the operating system interprets the encoded information and reports the information to the control plane process. The present invention can be advantageously utilized in passing multicast events from a forwarding-plane process to a control-plane process. Multicast events can be passed from a forwarding-plane process to a control-plane process without having to modify the control-plane process and without requiring the processes to pass messages via shared memory.
摘要翻译： 提供从转发平面到控制平面的安全高效的信息传递。 信息可以从转发平面进程传递到控制平面进程，而不必修改控制平面进程，而不需要进程通过共享内存传递信息。 信息在转发平面过程中进行编码。 编码的信息被传递到操作系统，其中操作系统解释编码的信息并将信息报告给控制平面过程。 本发明可以有利地用于将组播事件从转发平面过程传递到控制平面过程。 组播事件可以从转发平面进程传递到控制平面进程，而无需修改控制平面进程，而不需要进程通过共享内存传递消息。
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公开(公告)号：US07924743B2
公开(公告)日：2011-04-12
申请号：US11549708
申请日：2006-10-16
申请人： Janet Doong , Arun Kudur , Harish Sankaran
发明人： Janet Doong , Arun Kudur , Harish Sankaran
摘要： Described are a method and a device for efficiently switching multicast data flows from a shared distribution tree to a shortest path distribution tree. The method achieves an efficient and scalable tree switch that reduces the latency of multicast data transmitted from the source to receivers. A determination is made for each source group (S,G) entry in a portion of a forwarding plane database of a router as to whether a byte count for that entry exceeds a threshold value. A message sent from the forwarding plane to the router control plane indicates the (S,G) entries determined to have byte counts exceeding the respective threshold values. For each message entry, the respective shared distribution tree is switched to a shortest path distribution tree. The method achieves a substantial reduction in the number of inter-process messages exchanged between the control plane and the forwarding plane compared to conventional tree switchover techniques.
摘要翻译： 描述了用于有效地将组播数据流从共享分发树切换到最短路径分布树的方法和设备。 该方法实现了一种高效且可扩展的树形交换机，可以减少从源向接收方发送的组播数据的延迟。 对于路由器的转发平面数据库的一部分中的每个源组（S，G）条目，确定该条目的字节计数是否超过阈值。 从转发平面发送到路由器控制平面的消息指示（S，G）条目被确定为具有超过相应阈值的字节计数。 对于每个消息条目，相应的共享分发树被切换到最短路径分布树。 与常规树切换技术相比，该方法实现了在控制平面和转发平面之间交换的处理间消息的数量的显着减少。
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