公开(公告)号：US20070133530A1

公开(公告)日：2007-06-14

申请号：US11333843

申请日：2006-01-18

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： H04L12/56

CPC分类号： H04L45/00 ,  H04L12/185 ,  H04L12/1877 ,  H04L45/16

摘要： Various techniques for exchanging control messages in order to gracefully reroute multicast traffic are disclosed. For example, one method involves sending a join message for a multicast group towards a root of a new multicast tree and forwarding multicast traffic, addressed to the multicast group, on a current multicast tree until an acknowledgment corresponding to the join message is received. The new multicast tree can be identified in response to detection of a topology change within the network. Until the acknowledgment is received, multicast traffic that,is received via the new multicast tree can be dropped.

摘要翻译： 公开了用于交换控制消息以便正确地重新路由组播业务的各种技术。 例如，一种方法包括向新的多播树的根发送一个组播组的加入消息，并在当前的多播树上转发寻址到组播组的组播流，直到接收到与加入消息对应的确认。 可以响应于网络内的拓扑变化的检测来识别新的多播树。 直到接收到确认，可以删除通过新的多播树接收到的多播流量。

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

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

CPC分类号： H04L12/18 ,  H04L45/00 ,  H04L45/04 ,  H04L45/16 ,  H04L45/50 ,  H04L45/60

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）。

公开(公告)号：US20060159091A1

公开(公告)日：2006-07-20

申请号：US11038437

申请日：2005-01-19

申请人： Arjen Boers ,  Ijsbrand Wijnands

发明人： Arjen Boers ,  Ijsbrand Wijnands

IPC分类号： H04L12/56

CPC分类号： H04L45/28 ,  H04L45/00 ,  H04L45/16

摘要： In the disclosed active multicast information protocol, a first edge router of a network receives a data packet from a source, wherein the data packet comprises data to be sent to receivers of a multicast group. The first edge router may rout the data packet to a first core router within the network. The first edge router also generates a message in response to receiving the data packet. This message is transmitted to the first core router within a network. The message includes an address of the source, but the message lacks data to be transmitted to the receivers of the multicast group. Another edge router stores the first multicast group and source addresses in an entry of a look-up table (LUT) in response to the edge router receiving a first message directly or indirectly from the first edge router.

公开(公告)号：US09112788B2

公开(公告)日：2015-08-18

申请号：US13648500

申请日：2012-10-10

申请人： Pascal Thubert ,  Patrice Bellagamba ,  Ijsbrand Wijnands

发明人： Pascal Thubert ,  Patrice Bellagamba ,  Ijsbrand Wijnands

IPC分类号： H04L12/28 ,  H04L12/735 ,  H04L12/705 ,  H04L12/707

CPC分类号： H04L45/18 ,  H04L41/0803 ,  H04L45/02 ,  H04L45/128 ,  H04L45/24

摘要： In one embodiment, a method comprises creating, in a computing network, a loop-free routing topology comprising a plurality of routing arcs for reaching a destination network node, each routing arc comprising a first network node as a first end of the routing arc, a second network node as a second end of the routing arc, and at least a third network node configured for routing any network traffic along the routing arc toward the destination node via any one of the first or second ends of the routing arc, the loop-free routing topology providing first and second non-congruent paths; and forwarding bicasting data, comprising a data packet in a first direction from a network node and a bicasted copy of the data packet in a second direction from the network node, concurrently to the destination node respectively via the first and second non-congruent paths.

摘要翻译： 在一个实施例中，一种方法包括在计算网络中创建包括用于到达目的地网络节点的多个路由弧的无环路由拓扑，每个路由弧包括作为路由电弧的第一端的第一网络节点， 作为所述路由选择电弧的第二端的第二网络节点，以及至少第三网络节点，被配置为经由所述路由选择电弧的任何网络业务通过所述路由电弧的所述第一或第二端中的任何一个路向所述目的地节点，所述环路 - 提供第一和第二非一致路径的自由路由拓扑; 以及分别经由所述第一和第二非全等路径将包括来自网络节点的第一方向上的数据分组和来自所述网络节点的第二方向的所述数据分组的多播复制同时发送到所述目的地节点。

公开(公告)号：US08681631B2

公开(公告)日：2014-03-25

申请号：US13484606

申请日：2012-05-31

申请人： Ijsbrand Wijnands ,  Stefan Olofsson

发明人： Ijsbrand Wijnands ,  Stefan Olofsson

IPC分类号： G01R31/08

CPC分类号： H04L45/20 ,  H04L45/16 ,  H04L45/18 ,  H04L2212/00

摘要： In one embodiment, when a packet is received at a device in a network, the device may determine whether a time-to-live (TTL) value of the packet has expired. If the TTL value has not expired, the device forwards the packet to a next-hop device in the network. If the TTL value has expired, however, the device dampens a forwarding state related to the packet for an amount of time until resuming the forwarding state after that amount of time has elapsed. In an example embodiment, the packet is received within a multipoint-to-multipoint (MP2MP) bidirectional tunnel.

摘要翻译： 在一个实施例中，当在网络中的设备处接收到分组时，设备可以确定分组的生存时间（TTL）值是否已经过期。 如果TTL值尚未到期，设备将该报文转发给网络中的下一跳设备。 但是，如果TTL值过期，则会在与该报文相关的转发状态持续一段时间后，直到恢复转发状态为止。 在示例实施例中，在多点到多点（MP2MP）双向隧道内接收分组。

公开(公告)号：US20130322436A1

公开(公告)日：2013-12-05

申请号：US13484606

申请日：2012-05-31

申请人： Ijsbrand Wijnands ,  Stefan Olofsson

发明人： Ijsbrand Wijnands ,  Stefan Olofsson

IPC分类号： H04L12/56

CPC分类号： H04L45/20 ,  H04L45/16 ,  H04L45/18 ,  H04L2212/00

摘要： In one embodiment, when a packet is received at a device in a network, the device may determine whether a time-to-live (TTL) value of the packet has expired. If the TTL value has not expired, the device forwards the packet to a next-hop device in the network. If the TTL value has expired, however, the device dampens a forwarding state related to the packet for an amount of time until resuming the forwarding state after that amount of time has elapsed. In an example embodiment, the packet is received within a multipoint-to-multipoint (MP2MP) bidirectional tunnel.

摘要翻译： 在一个实施例中，当在网络中的设备处接收到分组时，设备可以确定分组的生存时间（TTL）值是否已经过期。 如果TTL值尚未到期，设备将该报文转发给网络中的下一跳设备。 但是，如果TTL值过期，则会在与该报文相关的转发状态持续一段时间后，直到恢复转发状态为止。 在示例实施例中，在多点到多点（MP2MP）双向隧道内接收分组。

公开(公告)号：US20130219035A1

公开(公告)日：2013-08-22

申请号：US13400841

申请日：2012-02-21

申请人： Frederic R. P. Detienne ,  Pratima Sethi ,  Ijsbrand Wijnands

发明人： Frederic R. P. Detienne ,  Pratima Sethi ,  Ijsbrand Wijnands

IPC分类号： G06F15/173

CPC分类号： H04L63/065 ,  H04L9/0833 ,  H04L9/3268

摘要： Upon detection of a new traffic flow, a registration node can dynamically register the new traffic flow with a key server policy manager by sending a registration request on behalf of the new traffic flow. A registration request indicates the new traffic flow should be protected by a security group. A registration request may also include a request to dynamically generate a new security group to protect the traffic flow. The registration request is received by a key server policy manager, which performs authentication and authorization checks of the requesting registration node, and determines whether to accept or reject the registration request. If accepted, the key server policy manager registers the new traffic flow by including a description of the traffic flow in a group policy of an existing security group or a newly created security group, depending on the registration request.

摘要翻译： 在检测到新的业务流时，注册节点可以通过代表新的业务流发送注册请求来与密钥服务器策略管理器动态注册新的业务流。 注册请求表示新的流量应由安全组保护。 注册请求还可以包括动态生成新的安全组以保护业务流的请求。 注册请求由密钥服务器策略管理器接收，密钥服务器策略管理器执行请求注册节点的认证和授权检查，并确定是接受还是拒绝注册请求。 如果接受，密钥服务器策略管理器根据注册请求，将现有安全组或新创建的安全组的组策略中的流量描述包含在流量中，从而注册新流量。

公开(公告)号：US20130208582A1

公开(公告)日：2013-08-15

申请号：US13493273

申请日：2012-06-11

申请人： IJsbrand Wijnands ,  Eric Rosen ,  Syed Kamran Raza ,  Nagendra Kumar

发明人： IJsbrand Wijnands ,  Eric Rosen ,  Syed Kamran Raza ,  Nagendra Kumar

IPC分类号： G06F11/00 ,  H04L12/56

CPC分类号： H04L45/22 ,  H04L45/28 ,  H04L45/507 ,  H04L49/552

摘要： A method is provided in one example and includes receiving first address information from a protected node over a first label switched path having a first label. The first address information is associated with a first network element. A second label switched path has been previously established with the first network element. The method further includes establishing a targeted session with the first network element, assigning a second label to the second label switched path, and sending the second label to the first network element over the targeted session.

摘要翻译： 在一个示例中提供了一种方法，并且包括通过具有第一标签的第一标签交换路径从受保护节点接收第一地址信息。 第一地址信息与第一网络元件相关联。 先前已经利用第一网络元件建立了第二标签交换路径。 所述方法还包括与所述第一网元建立目标会话，向所述第二标签交换路径分配第二标签，以及通过所述目标会话向所述第一网元发送所述第二标签。

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。

公开(公告)号：US20120195312A1

公开(公告)日：2012-08-02

申请号：US13361137

申请日：2012-01-30

申请人： Ijsbrand Wijnands ,  Arjen Boers ,  John S. Meylor

发明人： Ijsbrand Wijnands ,  Arjen Boers ,  John S. Meylor

IPC分类号： H04L12/56

CPC分类号： H04L45/50 ,  H04L12/18 ,  H04L12/1845 ,  H04L45/00 ,  H04L45/04 ,  H04L45/46 ,  H04L45/502 ,  H04L2012/5641 ,  H04L2012/5642 ,  H04L2012/6416

摘要： A method of using a point-to-point (P2P) label switched path (LSP) to transmit multicast data packets partially through a multiprotocol label switched (MPLS) network when one or more label switched routers (LSRs) of the MPLS are not multicast label distribution protocol (mLDP) enabled. The P2P LSP can be used to transmit multicast data packets to the head end of a point-to-multipoint (P2MP) LSP created with mLDP enabled LSRs. The P2MP LSP can be used to transmit the multicast data packets through the MPLS network to intended receivers that are external to the MPLS network. The P2MP LSP can be built from an egress edge LSR towards an ingress edge LSR, by mLDP enabled LSRs. The P2P LSP can be built from a core mLDP enabled LSR to the ingress edge LSR, across a non-mLDP enabled LSR between the core mLDP enabled LSR and the ingress edge LSR.

摘要翻译： 当MPLS的一个或多个标签交换路由器（LSR）不是多播时，使用点对点（P2P）标签交换路径（LSP）部分地通过多协议标签交换（MPLS）网络传输组播数据分组的方法 标签分发协议（mLDP）启用。 P2P LSP可用于将组播数据包发送到使用启用了mLDP的LSR创建的点对多点（P2MP）LSP的头端。 P2MP LSP可以用于通过MPLS网络将组播数据包传输到MPLS网络外部的预期接收者。 P2MP LSP可以从出口边缘LSR到入口边缘LSR，由启用了MLDP的LSR构建。 而P2P LSP可以从核心的mLDP启用LSR到边缘入口LSR建成，横跨非的mLDP核心的mLDP启用LSR和边缘入口LSR之间启用LSR。