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。

公开(公告)号：US08804718B2

公开(公告)日：2014-08-12

申请号：US12108197

申请日：2008-04-23

申请人： IJsbrand Wijnands ,  Arjen Boers

发明人： IJsbrand Wijnands ,  Arjen Boers

IPC分类号： H04L12/16 ,  H04L12/28 ,  H04L12/56 ,  H04J3/26 ,  G06F15/177 ,  H04N7/173

CPC分类号： H04L12/1886 ,  H04L45/02 ,  H04L45/16 ,  H04L45/48 ,  H04L45/50

摘要： A method is provided for pruning an MP2MP tree. The method includes (a) in a first node of an MP2MP LSP tree, the MP2MP LSP tree including a plurality of nodes, determining whether the first node has only a single replication branch for the MP2MP LSP tree, the single replication branch representing a downstream path to only a second node of the plurality of nodes, (b) in response to determining that the first node has only a single replication branch for the MP2MP LSP tree, sending a message to the second node indicating that the second node should refrain from sending upstream traffic towards the first node, and (c) in response to determining that the first node does not have only a single replication branch for the MP2MP LSP tree, refraining from sending a message to the second node indicating that the second node should refrain from sending upstream traffic of the MP2MP LSP tree towards the first node. Apparatus are also provided for use in practicing certain embodiments.

摘要翻译： 提供了一种修剪MP2MP树的方法。 该方法包括：（a）在MP2MP LSP树的第一节点中，包括多个节点的MP2MP LSP树，确定第一节点是否仅具有用于MP2MP LSP树的单个复制分支，单个复制分支表示下游 （b）响应于确定第一节点仅具有用于MP2MP LSP树的单个复制分支，向第二节点发送消息，指示第二节点应该避免 向第一节点发送上行流量，以及（c）响应于确定第一节点不具有用于MP2MP LSP树的单个复制分支，避免向第二节点发送消息，指示第二节点应该禁止 从MP2MP LSP树的上行流向第一个节点发送。 还提供了用于实施某些实施例的装置。

公开(公告)号：US08761161B2

公开(公告)日：2014-06-24

申请号：US13296386

申请日：2011-11-15

申请人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

发明人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

IPC分类号： H04L12/28 ,  H04H20/71 ,  H04L12/50

CPC分类号： H04L12/66

摘要： Techniques reliably provide the switchover from a default MDT to the data MDT by using reliable signaling and reliable building of a data MDT. The message notifying of the pending switchover to the data MDT is reliably sent using signaling that is reliable. Also, the switchover from the default MDT to the data MDT does not happen until all egress routers have responded to the message. Egress routers join the data MDT if associated receivers are interested in receiving the multicast stream from a source. The router does not send another response upstream until all egress routers downstream from it respond to the message in the positive or the negative.

摘要翻译： 技术通过使用可靠的信令和数据MDT的可靠构建，可靠地提供从默认MDT到数据MDT的切换。 通过可信赖的信令可靠地发送通知数据MDT的挂起切换的消息。 此外，在所有出口路由器都响应消息之前，不会发生从默认MDT到数据MDT的切换。 出口路由器加入数据MDT，如果相关接收者有兴趣从源接收组播流。 路由器不向上发送另一个响应，直到其下游的所有出口路由器响应消息为正或负。

公开(公告)号：US20120057594A1

公开(公告)日：2012-03-08

申请号：US13296386

申请日：2011-11-15

申请人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

发明人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

IPC分类号： H04L12/56

CPC分类号： H04L12/66

摘要： Techniques reliably provide the switchover from a default MDT to the data MDT by using reliable signaling and reliable building of a data MDT. The message notifying of the pending switchover to the data MDT is reliably sent using signaling that is reliable. Also, the switchover from the default MDT to the data MDT does not happen until all egress routers have responded to the message. Egress routers join the data MDT if associated receivers are interested in receiving the multicast stream from a source. The router does not send another response upstream until all egress routers downstream from it respond to the message in the positive or the negative.

摘要翻译： 技术通过使用可靠的信令和数据MDT的可靠构建，可靠地提供从默认MDT到数据MDT的切换。 通过可信赖的信令可靠地发送通知数据MDT的挂起切换的消息。 此外，在所有出口路由器都响应消息之前，不会发生从默认MDT到数据MDT的切换。 出口路由器加入数据MDT，如果相关接收者有兴趣从源接收组播流。 路由器不向上发送另一个响应，直到其下游的所有出口路由器响应消息为正或负。

公开(公告)号：US08064441B2

公开(公告)日：2011-11-22

申请号：US11876365

申请日：2007-10-22

申请人： Ijsbrand Wijnands ,  Arjen Boers

发明人： Ijsbrand Wijnands ,  Arjen Boers

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/502 ,  H04L45/04 ,  H04L45/50 ,  H04L45/60

摘要： An apparatus or method for upstream label allocation on LANs for multipoint (MP) label switched paths (LSPs). In one embodiment of the method, a first router receives a first incoming labeled data packet, wherein the first incoming labeled data packet comprises a first data packet and one or more first labels. The first router creates a first outgoing labeled data packet, wherein creating the first outgoing labeled data packet includes the step of swapping the one or more first labels of the first incoming labeled data packet with a context label and a forwarding label, wherein the first outgoing labeled data packet comprises the first data packet, the context label, and the forwarding label. Ultimately, the first router transmits the first outgoing labeled data packet to second and third routers via a LAN.

摘要翻译： 一种用于多点（MP）标签交换路径（LSP）的LAN上的上行标签分配的装置或方法。 在该方法的一个实施例中，第一路由器接收第一输入标记数据分组，其中第一输入标记数据分组包括第一数据分组和一个或多个第一标签。 第一路由器创建第一输出标记数据分组，其中创建第一输出标记数据分组包括用上下文标签和转发标签交换第一输入标记数据分组的一个或多个第一标签的步骤，其中第一输出 标签数据分组包括第一数据分组，上下文标签和转发标签。 最终，第一路由器经由LAN将第一输出标记数据分组发送到第二和第三路由器。

公开(公告)号：US07953027B2

公开(公告)日：2011-05-31

申请号：US11355525

申请日：2006-02-16

申请人： Stefano Previdi ,  Dino Farinacci ,  Ijsbrand Wijnands ,  Arjen Boers

发明人： Stefano Previdi ,  Dino Farinacci ,  Ijsbrand Wijnands ,  Arjen Boers

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04J3/26 ,  G06F15/16

CPC分类号： H04L45/16 ,  H04L12/1868 ,  H04L45/02 ,  H04L45/28 ,  H04L45/48

摘要： Various systems and methods for rerouting multicast traffic in response to detecting imminent network disruption are disclosed. One method involves detecting an imminent topology change and, in response, identifying a new multicast distribution tree for a multicast group. A join message for the multicast group is then sent towards a root of the new multicast distribution tree. Multicast traffic addressed to the multicast group continues to be forwarded via the current multicast distribution tree, subsequent to sending the join message. The multicast traffic is not forwarded via the new multicast distribution tree until one or more multicast data packets have been received via the new multicast distribution tree.

摘要翻译： 公开了响应于即将发生的网络中断而重新路由多播流量的各种系统和方法。 一种方法涉及检测即将发生的拓扑变化，并且作为响应，识别组播组的新的多播分发树。 然后将多播组的加入消息发送到新的多播分发树的根。 发送加入消息后，寻址到组播组的组播流量将继续通过当前的组播分发树进行转发。 组播流量不会通过新的组播分发树转发，直到通过新的组播分发树接收到一个或多个组播数据包。

公开(公告)号：US07830787B1

公开(公告)日：2010-11-09

申请号：US09962958

申请日：2001-09-25

申请人： IJsbrand Wijnands ,  Arjen Boers ,  Yiqun Cai ,  Tony Speakman

发明人： IJsbrand Wijnands ,  Arjen Boers ,  Yiqun Cai ,  Tony Speakman

IPC分类号： G01R31/08

CPC分类号： H04L12/18 ,  H04L12/4633 ,  H04L12/4641 ,  H04L47/10 ,  H04L47/122 ,  H04L47/15

摘要： A multicast transmission scheme is introduced. A multicast data stream is sent on a default tunnel and switched to a data tunnel during flooding conditions. The default tunnel is a point-to-multipoint tunnel from, for example, a source provider edge router to all other provider edge routers in a virtual private network. The data tunnel is a point-to-multipoint tunnel from, for example, a source provider edge router to other provider edge routers that have recipients. Flooding conditions can occur when sending the multicast data stream on the default tunnel, for example, when a specified bandwidth threshold has been exceeded on a source provider edge router. Additionally, the data tunnel is created by selecting a multicast distribution tunnel group from a configured pool of addresses, advertising the group, receiving data joins from, for example, provider edge routers with recipients, and waiting a specified send time.

摘要翻译： 引入组播传输方案。 组播数据流在缺省隧道中发送，并在洪泛条件下切换到数据隧道。 默认隧道是从虚拟专用网络到源提供商边缘路由器到所有其他提供商边缘路由器的点对多点隧道。 数据隧道是从例如源提供商边缘路由器到具有接收方的其他提供商边缘路由器的点对多点隧道。 在默认隧道上发送组播数据流时，例如在源提供商边缘路由器上超过指定的带宽阈值时，可能会发生洪泛条件。 另外，通过从配置的地址池中选择组播分发隧道组来创建数据隧道，通过该组广播，从例如具有接收者的提供者边缘路由器接收数据连接，并等待指定的发送时间。

公开(公告)号：US20070274235A1

公开(公告)日：2007-11-29

申请号：US11440756

申请日：2006-05-25

申请人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

发明人： Arjen Boers ,  Ijsbrand Wijnands ,  Nidhi Bhaskar

IPC分类号： H04L12/28

CPC分类号： H04L12/66

摘要： Techniques reliably provide the switchover from a default MDT to the data MDT by using reliable signaling and reliable building of a data MDT. The message notifying of the pending switchover to the data MDT is reliably sent using signaling that is reliable. Also, the switchover from the default MDT to the data MDT does not happen until all egress routers have responded to the message. Egress routers join the data MDT if associated receivers are interested in receiving the multicast stream from a source. The router does not send another response upstream until all egress routers downstream from it respond to the message in the positive or the negative.

摘要翻译： 技术通过使用可靠的信令和数据MDT的可靠构建，可靠地提供从默认MDT到数据MDT的切换。 通过可信赖的信令可靠地发送通知数据MDT的挂起切换的消息。 此外，在所有出口路由器都响应消息之前，不会发生从默认MDT到数据MDT的切换。 出口路由器加入数据MDT，如果相关接收者有兴趣从源接收组播流。 路由器不向上发送另一个响应，直到其下游的所有出口路由器响应消息为正或负。

公开(公告)号：US20070258454A1

公开(公告)日：2007-11-08

申请号：US11417829

申请日：2006-05-03

申请人： Ijsbrand Wijnands ,  Arjen Boers

发明人： Ijsbrand Wijnands ,  Arjen Boers

IPC分类号： H04L12/56

CPC分类号： H04L45/00 ,  H04L12/18 ,  H04L45/16

摘要： Techniques for dynamically distribute replication points based on routing metrics are provided. A receiver list may be split based on the routing metrics. For example, the receiver list may be split based on unicast reachability over an interface. If portions of egress routers are reachable over different interfaces, the portions are included together in a sublist. Thus, the list is split into sublists based on the reachability. Point-to-point links are then set up between a head end router and an egress router in each sublist. The sublist is then sent to each egress router, which can perform the process above in setting up a point-to-point link to another egress router in each sublist.

摘要翻译： 提供了基于路由度量动态分配复制点的技术。 接收器列表可以基于路由度量来分割。 例如，接收器列表可以基于通过接口的单播可达性被拆分。 如果出口路由器的部分可通过不同的接口访问，则这些部分被包括在子列表中。 因此，列表将根据可达性分为子列表。 然后在每个子列表中的头端路由器和出口路由器之间建立点对点链路。 然后将子列表发送到每个出口路由器，每个出口路由器可以执行上述过程，以在每个子列表中设置到另一个出口路由器的点对点链路。

公开(公告)号：US08355347B2

公开(公告)日：2013-01-15

申请号：US11960187

申请日：2007-12-19

申请人： Arjen Boers ,  IJsbrand Wijnands

发明人： Arjen Boers ,  IJsbrand Wijnands

IPC分类号： H04L12/28

CPC分类号： H04L45/16 ,  H04L12/18 ,  H04L45/02 ,  H04L45/48 ,  H04L45/50 ,  H04L45/507

摘要： In one embodiment, a method is provided. A first root node of a first Multipoint-to-Multipoint (MP2MP) Multi-Protocol Label Switching (MPLS) tree, advertises to a second root node of a second MP2MP MPLS tree a first label for the second root node to use to send multicast traffic to the first MP2MP MPLS tree. The first root node receives a second label from the second root node for the first root node to use to send multicast traffic to the second MP2MP MPLS tree. Communications are carried out between the first MP2MP MPLS tree and the second MP2MP MPLS tree using the first label and the second label. In another embodiment, apparatus are also provided.

摘要翻译： 在一个实施例中，提供了一种方法。 第一多点到多点（MP2MP）多协议标签交换（MPLS）树的第一个根节点向第二个MP2MP MPLS树的第二根节点通告第二个根节点用于发送组播的第一个标签 流量到第一个MP2MP MPLS树。 第一根节点从第二根节点接收第二个根节点，用于将第一个根节点用于向第二个MP2MP MPLS树发送组播流量。 使用第一个标签和第二个标签在第一个MP2MP MPLS树和第二个MP2MP MPLS树之间进行通信。 在另一个实施例中，还提供了装置。