In-band multicast signaling using LDP
    1.
    发明授权
    In-band multicast signaling using LDP 有权
    使用LDP的带内组播信令

    公开(公告)号:US07852841B2

    公开(公告)日:2010-12-14

    申请号:US11267674

    申请日:2005-11-04

    IPC分类号: H04L12/28

    摘要: A mechanism is provided by which a transport tree identifier can be generated using one or more identifiers for a multicast datastream. The transport tree identifier can then be used in the process of building a transport tree across a transport network. A transport network egress router can receive a request to join a multicast datastream from a downstream node outside of the transport network. The information contained in the join message that identifies the desired multicast datastream can be encoded in the transport tree identifier. The transport tree identifier can be related to one or more of a multicast group destination address, a multicast datastream source address, and a broadcast domain identifier.

    摘要翻译: 提供了一种机制,通过该机制可以使用用于组播数据流的一个或多个标识符来生成传输树标识符。 传输树标识符然后可以用于跨越传输网络构建传输树的过程。 传输网络出口路由器可以从传输网络外部的下游节点接收到加入组播数据流的请求。 标识期望的多播数据流的加入消息中包含的信息可以被编码在传输树标识符中。 传输树标识符可以与多播组目的地址,组播数据流源地址和广播域标识符中的一个或多个有关。

    AUTOMATION FALLBACK TO P2P LSPS FOR MLDP BUILT MULTIPOINT-TREES
    2.
    发明申请
    AUTOMATION FALLBACK TO P2P LSPS FOR MLDP BUILT MULTIPOINT-TREES 有权
    自动拒绝P2P LSPS,用于MLDP建立多点聚合

    公开(公告)号:US20120195312A1

    公开(公告)日:2012-08-02

    申请号:US13361137

    申请日:2012-01-30

    IPC分类号: H04L12/56

    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。

    Automation fallback to P2P LSPs for mLDP built multipoint-trees
    3.
    发明授权
    Automation fallback to P2P LSPs for mLDP built multipoint-trees 有权
    针对mLDP的P2P LSP的自动回退构建了多点树

    公开(公告)号:US08107473B2

    公开(公告)日:2012-01-31

    申请号:US11377063

    申请日:2006-03-16

    IPC分类号: H04L12/28 H04L12/56

    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. When configuring the P2MP LSP, an mLDP enabled LSR receives a first message from a non-mLDP enabled MPLS core router in response to sending a label mapping message to the non-mLDP enabled MPLS core router. In response, a directed LDP session is created between the mLDP enabled LSR and an edge LSR in one embodiment in response to receiving the first message from an MPLS enabled core router. The directed LDP session can be used to transmit a label mapping message to an ingress 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。 在配置P2MP LSP时,响应向不启用DNDP的MPLS核心路由器发送标签映射消息,启用了MLDP的LSR从非启用了DNDP的MPLS核心路由器收到第一条消息。 作为响应,响应于从启用MPLS的核心路由器接收到第一消息,在一个实施例中,在启用了MLDP的LSR和边缘LSR之间创建了定向LDP会话。 定向LDP会话可用于向入口LSR发送标签映射消息。

    Automation fallback to P2P LSPs for MLDP built multipoint-trees
    4.
    发明授权
    Automation fallback to P2P LSPs for MLDP built multipoint-trees 有权
    针对MLDP建立多点树的P2P LSP的自动化回退

    公开(公告)号:US08948170B2

    公开(公告)日:2015-02-03

    申请号:US13361137

    申请日:2012-01-30

    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。 P2P LSP可以通过核心mLDP启用的LSR构建到入口边缘LSR,跨越启用了MLDP的LSR和入口边缘LSR之间的非启用了DNDP的LSR。

    System and method for implementing multicast over a label-switched core network
    5.
    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

    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。

    Preventing traffic flooding to the root of a multi-point to multi-point label-switched path tree with no receivers
    6.
    发明授权
    Preventing traffic flooding to the root of a multi-point to multi-point label-switched path tree with no receivers 有权
    防止流量洪泛到没有接收器的多点到多点标签交换路径树的根目录

    公开(公告)号:US08804718B2

    公开(公告)日:2014-08-12

    申请号:US12108197

    申请日:2008-04-23

    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。

    Techniques for reliable switchover to a date multicast distribution tree (MDT)
    7.
    发明授权
    Techniques for reliable switchover to a date multicast distribution tree (MDT) 有权
    可靠切换到日期多播分发树(MDT)的技术

    公开(公告)号:US08761161B2

    公开(公告)日:2014-06-24

    申请号:US13296386

    申请日:2011-11-15

    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。

    Techniques for Reliable Switchover to a Date Multicast Distribution Tree (MDT)
    8.
    发明申请
    Techniques for Reliable Switchover to a Date Multicast Distribution Tree (MDT) 有权
    可靠切换到日期组播分发树(MDT)的技术

    公开(公告)号:US20120057594A1

    公开(公告)日:2012-03-08

    申请号:US13296386

    申请日:2011-11-15

    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。

    Upstream label allocation on Ethernets for MP2MP LSPS
    9.
    发明授权
    Upstream label allocation on Ethernets for MP2MP LSPS 有权
    用于MP2MP LSPS的以太网上的上行标签分配

    公开(公告)号:US08064441B2

    公开(公告)日:2011-11-22

    申请号:US11876365

    申请日:2007-10-22

    IPC分类号: H04L12/28 H04L12/56

    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。

    Rerouting multicast traffic in response to detecting imminent network disruption
    10.
    发明授权
    Rerouting multicast traffic in response to detecting imminent network disruption 有权
    响应于即将发生的网络中断,重新路由多播流量

    公开(公告)号:US07953027B2

    公开(公告)日:2011-05-31

    申请号:US11355525

    申请日:2006-02-16

    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。