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1. 发明申请

US20130188638A1 Multicast Source Registration 审中-公开
标题翻译：组播源注册
公开(公告)号：US20130188638A1
公开(公告)日：2013-07-25
申请号：US13356302
申请日：2012-01-23
申请人： Stig I. Venaas , Rishabh Parekh , Sameer R. Gulrajani , Toerless T. Eckert , Isidoros Kouvelas
发明人： Stig I. Venaas , Rishabh Parekh , Sameer R. Gulrajani , Toerless T. Eckert , Isidoros Kouvelas
IPC分类号： H04L12/56
CPC分类号： H04L12/185 , H04L45/16
摘要： A method, in accordance with particular embodiments, includes receiving an interest solicitation message advertising an availability of data from at least one source of a plurality of sources. The solicitation message comprises a source identifier indentifying the at least one source and a group identifier identifying at least one group. The method also includes sending a null message to a rendezvous node. The null message comprises the source identifier and the group identifier. The method additionally includes receiving, via the rendezvous node, a join message indicating that at least one endpoint has requested to join the at least one group identified by the group identifier. The method further includes sending a start message to the at least one source. The start message indicates that at least one endpoint has requested to join the group. The method also includes, receiving a first portion of the data after sending the start message.
摘要翻译：根据特定实施例的方法包括从多个源的至少一个源接收广告数据可用性的兴趣请求消息。请求消息包括识别至少一个源的源标识符和识别至少一个组的组标识符。该方法还包括向会合节点发送空消息。空消息包括源标识符和组标识符。该方法还包括经由会合节点接收指示至少一个端点已经请求加入由组标识符标识的至少一个组的加入消息。该方法还包括向至少一个源发送开始消息。开始消息指示至少有一个端点已请求加入组。该方法还包括：在发送开始消息之后接收数据的第一部分。

2. 发明授权

US07944811B2 Multiple multicast forwarder prevention during NSF recovery of control failures in a router 有权
标题翻译：在NSF恢复路由器中的控制故障期间，多个多播转发器预防
公开(公告)号：US07944811B2
公开(公告)日：2011-05-17
申请号：US12240515
申请日：2008-09-29
申请人： Kurt J. Windisch , Isidoros Kouvelas
发明人： Kurt J. Windisch , Isidoros Kouvelas
IPC分类号： H04L1/00
CPC分类号： H04L12/1877 , H04L49/201
摘要： In one embodiment, a multicast router initiates non-stop forwarding (NSF) recovery. In the NDF recovery, data traffic forwarding operations continue throughout a data plane of the multicast router in the presence of a failure in a control plane of the multicast router. When the multicast router receives incoming multicast packets on an interface during the NSF recovery, it compares the incoming multicast packets with entries of a multicast forwarding table of the data plane of the multicast router. In response to the comparison, the multicast router prevents multiple multicast forwarders from forwarding multicast packets for a route over a link coupled to the interface during the NSF recovery.
摘要翻译：在一个实施例中，组播路由器发起不间断转发（NSF）恢复。在NDF恢复中，在组播路由器的控制平面出现故障的情况下，数据流量转发操作在组播路由器的数据平面内继续进行。组播路由器在NSF恢复过程中接收到接收到的组播报文时，将传入组播报文与组播路由器数据平面组播转发表的条目进行比较。响应于比较，组播路由器防止多个多播转发器在NSF恢复期间通过耦合到接口的链路上的路由转发组播数据包。

3. 发明授权

US07447225B2 Multiple multicast forwarder prevention during NSF recovery of control failures in a router 有权
标题翻译：在NSF恢复路由器中的控制故障期间，多个多播转发器预防
公开(公告)号：US07447225B2
公开(公告)日：2008-11-04
申请号：US10897611
申请日：2004-07-23
申请人： Kurt J. Windisch , Isidoros Kouvelas
发明人： Kurt J. Windisch , Isidoros Kouvelas
IPC分类号： H04L12/54 , H04J3/26
CPC分类号： H04L12/1877 , H04L49/201
摘要： A technique prevents multiple multicast forwarders from forwarding multicast packets for a route over a link in a computer network during non-stop forwarding (NSF) recovery of one or more failures in a control plane of a multicast router. The multicast router has a functional infrastructure that allows data traffic forwarding operations to continue throughout a data plane of the router in the presence of a failure and/or software restart to a multicast component, e.g., a protocol independent multicast (PIM) routing protocol, executing in the control plane. Another multicast component, e.g., a multicast forwarding information base (MFIB) executing in the data plane, is configured to prevent multiple multicast forwarders due to routing changes in the network that arise during NSF recovery.
摘要翻译：在多播路由器的控制平面中的一个或多个故障的不间断转发（NSF）恢复期间，一种技术可以防止多个多播转发器在计算机网络中的链路上转发用于路由的多播数据包。多播路由器具有功能基础设施，允许数据流量转发操作在存在故障和/或软件重新启动到多播组件的情况下在路由器的数据平面内继续，例如，无协议的组播（PIM）路由协议，在控制平面上执行。在数据平面中执行的另一组播组件，例如组播转发信息库（MFIB）被配置为防止由于在NSF恢复期间出现的网络中的路由改变而导致的多个多播转发器。

4. 发明申请

US20060018253A1 System and method for preserving multicast data forwarding during control failures in a router 有权
标题翻译：在路由器控制失败期间保留组播数据转发的系统和方法
公开(公告)号：US20060018253A1
公开(公告)日：2006-01-26
申请号：US10897959
申请日：2004-07-23
申请人： Kurt Windisch , WeeSan Lee , Isidoros Kouvelas
发明人： Kurt Windisch , WeeSan Lee , Isidoros Kouvelas
IPC分类号： H04J1/16
CPC分类号： H04L45/00 , H04L43/0811 , H04L45/16 , H04L45/22 , H04L45/28 , H04L45/60
摘要： A multicast non-stop forwarding (NSF) router architecture enhances high availability of a multicast router in a computer network. The router architecture further preserves multicast data forwarding through a data plane during NSF recovery of one or more failures in a control plane of the router. Various multicast components of the router cooperate to provide a checkpointing and recovery technique of the multicast NSF architecture that enables efficient restart and recovery of the control plane failures without loss of data connectivity.
摘要翻译：多播不间断转发（NSF）路由器架构增强了计算机网络中组播路由器的高可用性。路由器架构还在路由器的控制平面中的一个或多个故障的NSF恢复期间进一步保留通过数据平面的组播数据转发。路由器的各种组播组件协同提供组播NSF架构的检查点和恢复技术，可以有效重新启动和恢复控制平面故障，而不会丢失数据连接。

5. 发明授权

US08040884B2 Constraining multicast traffic between a layer 2 network device and a router 有权
标题翻译：限制第2层网络设备和路由器之间的组播流量
公开(公告)号：US08040884B2
公开(公告)日：2011-10-18
申请号：US11198999
申请日：2005-08-08
申请人： Senthil Arunachalam , Sundher Narayanaswamy , Isidoros Kouvelas , Ishan Wu , Toerless Eckert
发明人： Senthil Arunachalam , Sundher Narayanaswamy , Isidoros Kouvelas , Ishan Wu , Toerless Eckert
IPC分类号： H04L12/54
CPC分类号： H04L12/18 , H04L12/4625 , H04L45/16
摘要： A method, system, computer program product and apparatus are presented to enable a L2 network device, such as a bridge or switch, to control the flow of a multicast data stream to a connected router in response to control messages received from the router by the L2 network device. By controlling the flow of multicast data streams in this manner, there will be a corresponding reduction in wasted bandwidth due to unnecessary transmission of these multicast data streams and a reduction in processing overhead by the router due to analysis and dropping of unnecessary multicast frames. In one aspect of the present invention, the router can generate the control messages in response to receiving a data frame in a multicast data stream from the L2 network device. The router can determine whether a subscriber to that multicast data stream is connected downstream of the router and then transmit an appropriate control message to the upstream L2 network device, indicating whether the router does or does not have a downstream subscriber. In response to such a control message, the L2 network device can cease transmitting the multicast data stream to the router, if appropriate.
摘要翻译：提出了一种方法，系统，计算机程序产品和装置，以使诸如网桥或交换机之类的L2网络设备能够响应于从路由器接收到的控制消息来控制组播数据流到连接的路由器的流 L2网络设备。通过以这种方式控制组播数据流的流动，由于这些组播数据流的不必要的传输和由于不必要的多播帧的分析和丢弃而导致的路由器的处理开销的降低，相应地减少了带宽浪费。在本发明的一个方面，路由器可以响应于从L2网络设备接收到组播数据流中的数据帧来生成控制消息。路由器可以确定该组播数据流的用户是否连接在路由器下游，然后向上游L2网络设备发送适当的控制消息，指示路由器是否有下游用户。响应于这样的控制消息，如果适当，则L2网络设备可以停止向路由器发送组播数据流。

6. 发明授权

US07787360B2 System and method for preserving multicast data forwarding during control failures in a router 有权
标题翻译：在路由器控制失败期间保留组播数据转发的系统和方法
公开(公告)号：US07787360B2
公开(公告)日：2010-08-31
申请号：US10897959
申请日：2004-07-23
申请人： Kurt J. Windisch , WeeSan Lee , Isidoros Kouvelas
发明人： Kurt J. Windisch , WeeSan Lee , Isidoros Kouvelas
IPC分类号： G01R31/08
CPC分类号： H04L45/00 , H04L43/0811 , H04L45/16 , H04L45/22 , H04L45/28 , H04L45/60
摘要： A multicast non-stop forwarding (NSF) router architecture enhances high availability of a multicast router in a computer network. The router architecture further preserves multicast data forwarding through a data plane during NSF recovery of one or more failures in a control plane of the router. Various multicast components of the router cooperate to provide a checkpointing and recovery technique of the multicast NSF architecture that enables efficient restart and recovery of the control plane failures without loss of data connectivity.
摘要翻译：多播不间断转发（NSF）路由器架构增强了计算机网络中组播路由器的高可用性。路由器架构还在路由器的控制平面中的一个或多个故障的NSF恢复期间进一步保留通过数据平面的组播数据转发。路由器的各种组播组件协同提供组播NSF架构的检查点和恢复技术，可以有效重新启动和恢复控制平面故障，而不会丢失数据连接。

7. 发明申请

US20060018333A1 Multiple multicast forwarder prevention during NSF recovery of control failures in a router 有权
标题翻译：在NSF恢复路由器中的控制故障期间，多个多播转发器预防
公开(公告)号：US20060018333A1
公开(公告)日：2006-01-26
申请号：US10897611
申请日：2004-07-23
申请人： Kurt Windisch , Isidoros Kouvelas
发明人： Kurt Windisch , Isidoros Kouvelas
IPC分类号： H04J3/26
CPC分类号： H04L12/1877 , H04L49/201
摘要： A technique prevents multiple multicast forwarders from forwarding multicast packets for a route over a link in a computer network during non-stop forwarding (NSF) recovery of one or more failures in a control plane of a multicast router. The multicast router has a functional infrastructure that allows data traffic forwarding operations to continue throughout a data plane of the router in the presence of a failure and/or software restart to a multicast component, e.g., a protocol independent multicast (PIM) routing protocol, executing in the control plane. Another multicast component, e.g., a multicast forwarding information base (MFIB) executing in the data plane, is configured to prevent multiple multicast forwarders due to routing changes in the network that arise during NSF recovery.
摘要翻译：在多播路由器的控制平面中的一个或多个故障的不间断转发（NSF）恢复期间，一种技术可以防止多个多播转发器在计算机网络中的链路上转发用于路由的多播数据包。多播路由器具有功能基础设施，允许数据流量转发操作在存在故障和/或软件重新启动到多播组件的情况下在路由器的数据平面内继续，例如，无协议的组播（PIM）路由协议，在控制平面上执行。在数据平面中执行的另一组播组件，例如组播转发信息库（MFIB）被配置为防止由于在NSF恢复期间出现的网络中的路由改变而导致的多个多播转发器。

8. 发明申请

US20090028044A1 MULTPLE MULTICAST FORWARDER PREVENTION DURING NSF RECOVERY OF CONTROL FAILURES IN A ROUTER 有权
标题翻译： NSF恢复期间的多播多媒体前向预防措施恢复路由器中的控制失败
公开(公告)号：US20090028044A1
公开(公告)日：2009-01-29
申请号：US12240515
申请日：2008-09-29
申请人： Kurt J. Windisch , Isidoros Kouvelas
发明人： Kurt J. Windisch , Isidoros Kouvelas
IPC分类号： G06F11/00
CPC分类号： H04L12/1877 , H04L49/201
摘要： In one embodiment, a multicast router initiates non-stop forwarding (NSF) recovery. In the NDF recovery, data traffic forwarding operations continue throughout a data plane of the multicast router in the presence of a failure in a control plane of the multicast router. When the multicast router receives incoming multicast packets on an interface during the NSF recovery, it compares the incoming multicast packets with entries of a multicast forwarding table of the data plane of the multicast router. In response to the comparison, the multicast router prevents multiple multicast forwarders from forwarding multicast packets for a route over a link coupled to the interface during the NSF recovery.
摘要翻译：在一个实施例中，组播路由器发起不间断转发（NSF）恢复。在NDF恢复中，在组播路由器的控制平面出现故障的情况下，数据流量转发操作在组播路由器的数据平面内继续进行。组播路由器在NSF恢复过程中接收到接收到的组播报文时，将传入组播报文与组播路由器数据平面组播转发表的条目进行比较。响应于比较，组播路由器防止多个多播转发器在NSF恢复期间通过耦合到接口的链路上的路由转发组播数据包。

9. 发明申请

US20070030817A1 Constraining multicast traffic between a layer 2 network device and a router 有权
标题翻译：限制第2层网络设备和路由器之间的组播流量
公开(公告)号：US20070030817A1
公开(公告)日：2007-02-08
申请号：US11198999
申请日：2005-08-08
申请人： Senthil Arunachalam , Sundher Narayanaswamy , Isidoros Kouvelas , Ishan Wu , Toerless Eckert
发明人： Senthil Arunachalam , Sundher Narayanaswamy , Isidoros Kouvelas , Ishan Wu , Toerless Eckert
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L12/18 , H04L12/4625 , H04L45/16
摘要： A method, system, computer program product and apparatus are presented to enable a L2 network device, such as a bridge or switch, to control the flow of a multicast data stream to a connected router in response to control messages received from the router by the L2 network device. By controlling the flow of multicast data streams in this manner, there will be a corresponding reduction in wasted bandwidth due to unnecessary transmission of these multicast data streams and a reduction in processing overhead by the router due to analysis and dropping of unnecessary multicast frames. In one aspect of the present invention, the router can generate the control messages in response to receiving a data frame in a multicast data stream from the L2 network device. The router can determine whether a subscriber to that multicast data stream is connected downstream of the router and then transmit an appropriate control message to the upstream L2 network device, indicating whether the router does or does not have a downstream subscriber. In response to such a control message, the L2 network device can cease transmitting the multicast data stream to the router, if appropriate.
摘要翻译：提出了一种方法，系统，计算机程序产品和装置，以使诸如网桥或交换机之类的L2网络设备能够响应于从路由器接收到的控制消息来控制组播数据流到连接的路由器的流 L2网络设备。通过以这种方式控制组播数据流的流动，由于这些组播数据流的不必要的传输和由于不必要的多播帧的分析和丢弃而导致的路由器的处理开销的降低，相应地减少了带宽浪费。在本发明的一个方面，路由器可以响应于从L2网络设备接收到组播数据流中的数据帧来生成控制消息。路由器可以确定该组播数据流的用户是否连接在路由器下游，然后向上游L2网络设备发送适当的控制消息，指示路由器是否有下游用户。响应于这样的控制消息，如果适当，则L2网络设备可以停止向路由器发送组播数据流。

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