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1.发明授权System and method for implementing multicast over a label-switched core network 有权通过标签交换核心网实现组播的系统和方法公开(公告)号：US08934486B2
公开(公告)日：2015-01-13
申请号：US11377064
申请日：2006-03-16
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
IPC分类号： H04L12/28 , H04L12/56 , H04J3/26 , H04L12/701 , H04L12/18 , H04L12/46 , H04L12/761 , H04L12/723 , H04L12/931 , H04L12/66
CPC分类号： H04L45/00 , H04L12/18 , H04L12/1836 , H04L12/185 , H04L12/4633 , H04L12/66 , H04L45/16 , H04L45/50 , H04L49/201
摘要： Various devices and methods for implementing multicast over a label-switched core network are disclosed. For example, an edge node can include a physical interface, which is not enabled for multicast, that is configured to be coupled to a core network and a packet rewrite module coupled to the physical interface. The packet rewrite module is configured to encapsulate a multicast packet with a label and to send the encapsulated multicast packet to the physical interface. The label identifies a unicast label switched path (LSP) through the core network. The edge node can also include a virtual interface creation configured to create a virtual interface that is enabled for multicast. The packet rewrite module can encapsulate the multicast packet in response to detecting that the multicast packet is being sent via the virtual interface.
摘要翻译： 公开了通过标签交换核心网实现组播的各种设备和方法。 例如，边缘节点可以包括被配置为耦合到核心网络的物理接口，其不被启用多播，以及耦合到物理接口的分组重写模块。 分组重写模块被配置为封装具有标签的多播分组，并将封装的组播分组发送到物理接口。 标签通过核心网标识出单播标签交换路径（LSP）。 边缘节点还可以包括虚拟接口创建，其被配置为创建为多播启用的虚拟接口。 响应于通过虚拟接口发送组播数据包，数据包重写模块可以封装组播数据包。
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2.发明授权Transporting multicast over MPLS backbone using virtual interfaces to perform reverse-path forwarding checks 有权使用虚拟接口在MPLS骨干网上传输组播，执行反向路径转发检查公开(公告)号：US08774180B2
公开(公告)日：2014-07-08
申请号：US13339953
申请日：2011-12-29
申请人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
发明人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
IPC分类号： H04L12/56
摘要： A mechanism is provided in which multicast reverse path forwarding can be performed at a provider network egress edge router wherein core routers of the provider network are not configured to support multicast protocols or point-to-multipoint LSPs. An embodiment of the present invention provides for the creation of virtual interfaces in the egress edge router element during configuration of a multicast connection in response to a subscriber request. A virtual interface will be associated with an upstream ingress edge router element and that ingress edge router element is provided a label associated with the virtual interface. Such a label can then be included in datastream packets transmitted through the provider network and be used by reverse path forward checking at the egress edge router element to ascertain whether the multicast datastream is being received by the correct upstream interface.
摘要翻译： 提供了一种机制，其中可以在提供商网络出口边缘路由器处执行多播反向路径转发，其中提供商网络的核心路由器未配置为支持多播协议或点对多点LSP。 本发明的实施例提供了响应于用户请求在配置多播连接期间在出口边缘路由器元件中创建虚拟接口。 虚拟接口将与上游入口边缘路由器元件相关联，并且入口边缘路由器元件被提供与虚拟接口相关联的标签。 然后可以将这样的标签包括在通过提供商网络传输的数据流包中，并通过出口边缘路由器元件的反向路径前向检查来使用，以确定正确的上行接口是否正在接收多播数据流。
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3.发明授权Transporting multicast over MPLS backbone using virtual interfaces to perform reverse-path forwarding checks 有权使用虚拟接口在MPLS骨干网上传输组播，执行反向路径转发检查公开(公告)号：US08089964B2
公开(公告)日：2012-01-03
申请号：US11204446
申请日：2005-08-16
申请人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
发明人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
IPC分类号： H04L12/56
摘要： A mechanism is provided in which multicast reverse path forwarding can be performed at a provider network egress edge router wherein core routers of the provider network are not configured to support multicast protocols or point-to-multipoint LSPs. An embodiment of the present invention provides for the creation of virtual interfaces in the egress edge router element during configuration of a multicast connection in response to a subscriber request. A virtual interface will be associated with an upstream ingress edge router element and that ingress edge router element is provided a label associated with the virtual interface. Such a label can then be included in datastream packets transmitted through the provider network and be used by reverse path forward checking at the egress edge router element to ascertain whether the multicast datastream is being received by the correct upstream interface.
摘要翻译： 提供了一种机制，其中可以在提供商网络出口边缘路由器处执行多播反向路径转发，其中提供商网络的核心路由器未配置为支持多播协议或点对多点LSP。 本发明的实施例提供了响应于用户请求在配置多播连接期间在出口边缘路由器元件中创建虚拟接口。 虚拟接口将与上游入口边缘路由器元件相关联，并且入口边缘路由器元件被提供与虚拟接口相关联的标签。 然后可以将这样的标签包括在通过提供商网络传输的数据流包中，并通过出口边缘路由器元件的反向路径前向检查来使用，以确定正确的上行接口是否正在接收多播数据流。
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4.发明申请TRANSPORTING MULTICAST OVER MPLS BACKBONE USING VIRTUAL INTERFACES TO PERFORM REVERSE-PATH FORWARDING CHECKS 有权使用虚拟界面进行MPLS逆向传输，支持逆向路由检测公开(公告)号：US20120163373A1
公开(公告)日：2012-06-28
申请号：US13339953
申请日：2011-12-29
申请人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
发明人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
摘要： A mechanism is provided in which multicast reverse path forwarding can be performed at a provider network egress edge router wherein core routers of the provider network are not configured to support multicast protocols or point-to-multipoint LSPs. An embodiment of the present invention provides for the creation of virtual interfaces in the egress edge router element during configuration of a multicast connection in response to a subscriber request. A virtual interface will be associated with an upstream ingress edge router element and that ingress edge router element is provided a label associated with the virtual interface. Such a label can then be included in datastream packets transmitted through the provider network and be used by reverse path forward checking at the egress edge router element to ascertain whether the multicast datastream is being received by the correct upstream interface.
摘要翻译： 提供了一种机制，其中可以在提供商网络出口边缘路由器处执行多播反向路径转发，其中提供商网络的核心路由器未配置为支持多播协议或点对多点LSP。 本发明的实施例提供了响应于用户请求在配置多播连接期间在出口边缘路由器元件中创建虚拟接口。 虚拟接口将与上游入口边缘路由器元件相关联，并且入口边缘路由器元件被提供与虚拟接口相关联的标签。 然后可以将这样的标签包括在通过提供商网络传输的数据流包中，并通过出口边缘路由器元件的反向路径前向检查来使用，以确定正确的上行接口是否正在接收多播数据流。
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公开(公告)号：US20110058567A1
公开(公告)日：2011-03-10
申请号：US12944901
申请日：2010-11-12
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
摘要： A mechanism is provided to configure a plurality of transport trees in a transport network, each of which correspond to a native tree (e.g., a bidirectional multicast tree). In embodiments of the present invention, each of the plurality of transport trees has a unique root node so that in the event of a failure of any root node, the transport trees with surviving root nodes can be used to transport traffic from the native tree. The present invention provides for each transport network edge router being independently responsible for selection of a transport tree that the edge router will use to transmit a datastream, while also being capable of receiving packets from any transport tree. Through the use of such configured transport trees along with independent selection of a transport tree, the present invention provides a reduction in the disruption of datastream transmission due to a root node failure.
摘要翻译： 提供了一种机制来配置传输网络中的多个传输树，每个传输树对应于本地树（例如，双向多播树）。 在本发明的实施例中，多个传输树中的每一个具有唯一的根节点，使得在任何根节点发生故障的情况下，具有幸存根节点的传输树可以用于从本地树传输业务。 本发明提供每个传输网络边缘路由器独立负责边缘路由器将用于传输数据流的传输树的选择，同时还能够从任何传输树接收分组。 通过使用这种配置的传输树以及传输树的独立选择，本发明提供了减少由于根节点故障引起的数据流传输的中断。
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公开(公告)号：US07835378B2
公开(公告)日：2010-11-16
申请号：US11346411
申请日：2006-02-02
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
IPC分类号： H04L12/44
摘要： A mechanism is provided to configure a plurality of transport trees in a transport network, each of which correspond to a native tree (e.g., a bidirectional multicast tree). In embodiments of the present invention, each of the plurality of transport trees has a unique root node so that in the event of a failure of any root node, the transport trees with surviving root nodes can be used to transport traffic from the native tree. The present invention provides for each transport network edge router being independently responsible for selection of a transport tree that the edge router will use to transmit a datastream, while also being capable of receiving packets from any transport tree. Through the use of such configured transport trees along with independent selection of a transport tree, the present invention provides a reduction in the disruption of datastream transmission due to a root node failure. Aspects of the present invention further provide a capacity for root node load balancing by permitting data transmission over any of the configured transport trees on a source-by-source (or edge router-by-edge router) basis.
摘要翻译： 提供了一种机制来配置传输网络中的多个传输树，每个传输树对应于本地树（例如，双向多播树）。 在本发明的实施例中，多个传输树中的每一个具有唯一的根节点，使得在任何根节点发生故障的情况下，具有幸存根节点的传输树可以用于从本地树传输业务。 本发明提供每个传输网络边缘路由器独立负责边缘路由器将用于传输数据流的传输树的选择，同时还能够从任何传输树接收分组。 通过使用这种配置的传输树以及传输树的独立选择，本发明提供了减少由于根节点故障引起的数据流传输的中断。 本发明的方面还通过允许基于源（或边缘路由器 - 边缘路由器）的任何配置的传输树进行数据传输来提供用于根节点负载平衡的能力。
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7.发明申请System and method for implementing multicast over a label-switched core network 有权通过标签交换核心网实现组播的系统和方法公开(公告)号：US20070217415A1
公开(公告)日：2007-09-20
申请号：US11377064
申请日：2006-03-16
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L12/18 , H04L12/1836 , H04L12/185 , H04L12/4633 , H04L12/66 , H04L45/16 , H04L45/50 , H04L49/201
摘要： Various devices and methods for implementing multicast over a label-switched core network are disclosed. For example, an edge node can include a physical interface, which is not enabled for multicast, that is configured to be coupled to a core network and a packet rewrite module coupled to the physical interface. The packet rewrite module is configured to encapsulate a multicast packet with a label and to send the encapsulated multicast packet to the physical interface. The label identifies a unicast label switched path (LSP) through the core network. The edge node can also include a virtual interface creation configured to create a virtual interface that is enabled for multicast. The packet rewrite module can encapsulate the multicast packet in response to detecting that the multicast packet is being sent via the virtual interface.
摘要翻译： 公开了通过标签交换核心网实现组播的各种设备和方法。 例如，边缘节点可以包括被配置为耦合到核心网络的物理接口，其不被启用多播，以及耦合到物理接口的分组重写模块。 分组重写模块被配置为封装具有标签的多播分组，并将封装的组播分组发送到物理接口。 标签通过核心网标识出单播标签交换路径（LSP）。 边缘节点还可以包括虚拟接口创建，其被配置为创建为多播启用的虚拟接口。 响应于通过虚拟接口发送组播数据包，数据包重写模块可以封装组播数据包。
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公开(公告)号：US08953604B2
公开(公告)日：2015-02-10
申请号：US12944901
申请日：2010-11-12
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
IPC分类号： H04L12/753 , H04L12/18 , H04L12/751 , H04L12/761 , H04L12/703 , H04L12/801 , H04L12/803
摘要： A mechanism is provided to configure a plurality of transport trees in a transport network, each of which correspond to a native tree (e.g., a bidirectional multicast tree). In embodiments of the present invention, each of the plurality of transport trees has a unique root node so that in the event of a failure of any root node, the transport trees with surviving root nodes can be used to transport traffic from the native tree. The present invention provides for each transport network edge router being independently responsible for selection of a transport tree that the edge router will use to transmit a datastream, while also being capable of receiving packets from any transport tree. Through the use of such configured transport trees along with independent selection of a transport tree, the present invention provides a reduction in the disruption of datastream transmission due to a root node failure.
摘要翻译： 提供了一种机制来配置传输网络中的多个传输树，每个传输树对应于本地树（例如，双向多播树）。 在本发明的实施例中，多个传输树中的每一个具有唯一的根节点，使得在任何根节点发生故障的情况下，具有幸存根节点的传输树可以用于从本地树传输业务。 本发明提供每个传输网络边缘路由器独立负责边缘路由器将用于传输数据流的传输树的选择，同时还能够从任何传输树接收分组。 通过使用这种配置的传输树以及传输树的独立选择，本发明提供了减少由于根节点故障引起的数据流传输的中断。
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公开(公告)号：US20070177525A1
公开(公告)日：2007-08-02
申请号：US11346411
申请日：2006-02-02
申请人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
发明人： Ijsbrand Wijnands , Arjen Boers , Alton Lo
摘要： A mechanism is provided to configure a plurality of transport trees in a transport network, each of which correspond to a native tree (e.g., a bidirectional multicast tree). In embodiments of the present invention, each of the plurality of transport trees has a unique root node so that in the event of a failure of any root node, the transport trees with surviving root nodes can be used to transport traffic from the native tree. The present invention provides for each transport network edge router being independently responsible for selection of a transport tree that the edge router will use to transmit a datastream, while also being capable of receiving packets from any transport tree. Through the use of such configured transport trees along with independent selection of a transport tree, the present invention provides a reduction in the disruption of datastream transmission due to a root node failure. Aspects of the present invention further provide a capacity for root node load balancing by permitting data transmission over any of the configured transport trees on a source-by-source (or edge router-by-edge router) basis.
摘要翻译： 提供了一种机制来配置传输网络中的多个传输树，每个传输树对应于本地树（例如，双向多播树）。 在本发明的实施例中，多个传输树中的每一个具有唯一的根节点，使得在任何根节点发生故障的情况下，具有幸存根节点的传输树可以用于从本地树传输业务。 本发明提供每个传输网络边缘路由器独立负责边缘路由器将用于传输数据流的传输树的选择，同时还能够从任何传输树接收分组。 通过使用这种配置的传输树以及传输树的独立选择，本发明提供了减少由于根节点故障引起的数据流传输的中断。 本发明的方面还通过允许基于源（或边缘路由器 - 边缘路由器）的任何配置的传输树进行数据传输来提供用于根节点负载平衡的能力。
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10.发明申请Transporting multicast over MPLS backbone using virtual interfaces to perform reverse-path forwarding checks 有权使用虚拟接口在MPLS骨干网上传输组播，执行反向路径转发检查公开(公告)号：US20060221975A1
公开(公告)日：2006-10-05
申请号：US11204446
申请日：2005-08-16
申请人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
发明人： Alton Lo , Arjen Boers , Ijsbrand Wijnands
摘要： A mechanism is provided in which multicast reverse path forwarding can be performed at a provider network egress edge router wherein core routers of the provider network are not configured to support multicast protocols or point-to-multipoint LSPs. An embodiment of the present invention provides for the creation of virtual interfaces in the egress edge router element during configuration of a multicast connection in response to a subscriber request. A virtual interface will be associated with an upstream ingress edge router element and that ingress edge router element is provided a label associated with the virtual interface. Such a label can then be included in datastream packets transmitted through the provider network. The label can then be used by reverse path forward checking at the egress edge router element to ascertain whether the multicast datastream is being received by the correct upstream interface (e.g., the virtual interface associated with the ingress edge router element). In such a manner, core network router elements of the provider's network need not be configured to process multicast transmissions as such, nor need the core router elements be configured to use the same network protocols as those used by the customer networks (e.g., customer networks can use IPv6 while the core network routers can use IPv4).
摘要翻译： 提供了一种机制，其中可以在提供商网络出口边缘路由器处执行多播反向路径转发，其中提供商网络的核心路由器未配置为支持多播协议或点对多点LSP。 本发明的实施例提供了响应于用户请求在配置多播连接期间在出口边缘路由器元件中创建虚拟接口。 虚拟接口将与上游入口边缘路由器元件相关联，并且入口边缘路由器元件被提供与虚拟接口相关联的标签。 然后可以将这样的标签包括在通过提供商网络传输的数据流包中。 然后可以通过出口边缘路由器元件的反向路径前向检查来使用标签，以确定正确的上游接口（例如，与入口边缘路由器元件相关联的虚拟接口）是否接收到组播数据流。 以这种方式，提供商网络的核心网络路由器元件不需要被配置为如此处理组播传输，也不需要将核心路由器元件配置为使用与客户网络所使用的相同的网络协议（例如，客户网络 可以使用IPv6，而核心网路由器可以使用IPv4）。
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