公开(公告)号：US20170041215A1

公开(公告)日：2017-02-09

申请号：US15332159

申请日：2016-10-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yisong LIU ,  Yuanbin Yin

IPC: H04L12/707 ,  H04L12/26 ,  H04L12/741 ,  H04L12/24 ,  H04L12/761 ,  H04L12/703

CPC classification number: H04L45/22 ,  H04L12/18 ,  H04L41/0631 ,  H04L43/10 ,  H04L45/16 ,  H04L45/28 ,  H04L45/74

Abstract: Embodiments of the present invention provide a path checking method, a sink node device, and a communications system. The path checking method includes: a sink node determines whether a check packet sent by an ingress node by using a check multicast tree is received within a predetermined time, where the sink node is a node connected to a receiver, the ingress node is a node connected to a multicast source, and the check multicast tree and a first multicast tree have a same transmission path and different multicast addresses; and if the sink node determines that no check packet sent by the ingress node by using the check multicast tree is received within the predetermined time, the sink node determines a path fault exists in an upstream node of the sink node in the first multicast tree.

Abstract translation: 本发明的实施例提供路径检查方法，汇聚节点设备和通信系统。 路径检查方法包括：汇聚节点确定在预定时间内是否接收到入节点通过使用检查多播树发送的检查分组，其中汇聚节点是连接到接收者的节点，入口节点是节点 连接到组播源，校验组播树和第一组播树具有相同的传输路径和不同的组播地址; 并且如果接收节点确定在预定时间内没有接收到由入节点发送的检查分组，则汇聚节点确定在第一多播树中的汇聚节点的上游节点中存在的路径故障。

公开(公告)号：US20160043878A1

公开(公告)日：2016-02-11

申请号：US14885500

申请日：2015-10-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiguo HAO ,  Yisong LIU

IPC: H04L12/18 ,  H04L12/761

CPC classification number: H04L12/185 ,  H04L45/16

Abstract: The application provides a multicast communications method and an aggregation switch, which can implement on-demand replication of multicast traffic. The method includes: an aggregation switch (AGG) acquires a multicast group address link state protocol data unit (GM LSP) packet sent by an access switch (ACC); the AGG compares multicast join information in the GM LSP packet with multicast join information stored in the AGG, to obtain a comparison result, and the AGG updates the multicast join information stored in the AGG according to the comparison result. The AGG generates a preset-protocol packet by using changed multicast join information in the comparison result according to a preset format, where the preset-protocol packet is an Internet Group Management Protocol (IGMP) packet or a Protocol Independent Multicast (PIM) packet. The AGG sends the preset-protocol packet to a first multicast router.

Abstract translation: 该应用提供了组播通信方式和聚合交换机，可以实现组播流量的按需复制。 该方法包括：聚合交换机（AGG）获取由接入交换机（ACC）发送的组播组地址链路状态协议数据单元（GM LSP）报文; AGG将GM LSP分组中的组播加入信息与存储在AGG中的组播加入信息进行比较，获得比较结果，AGG根据比较结果更新存储在AGG中的组播加入信息。 AGG根据预设格式，通过使用改变的组播加入信息，在比较结果中生成预设协议报文，预设协议报文是互联网组管理协议（IGMP）报文或协议无关组播（PIM）报文。 AGG将预设协议报文发送给第一个组播路由器。

公开(公告)号：US20210328936A1

公开(公告)日：2021-10-21

申请号：US17234407

申请日：2021-04-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yisong LIU

IPC: H04L12/851 ,  H04L12/927 ,  H04L12/923 ,  H04L12/911 ,  H04L12/801 ,  H04L12/46

Abstract: A method for determining a DF of a multicast flow, a device, and a system are disclosed. In an EVPN scenario, a CE device is connected to a plurality of PE devices in a dual-homed or multi-homed manner. A first PE device is any one of the plurality of PE devices. After determining that the CE device connected to an Ethernet link joins a multicast group of a multicast flow, the first PE device determines bandwidth occupation statuses of a plurality of Ethernet links included in an ES to which the Ethernet link belongs, and then determines, as a DF of the multicast flow based on the multicast flow bandwidth occupation statuses of the plurality of Ethernet links, a PE device corresponding to an Ethernet link that occupies lowest multicast flow bandwidth. This helps improve equalization of load sharing for multicast flow transmission on an EVPN.

公开(公告)号：US20150124810A1

公开(公告)日：2015-05-07

申请号：US14594864

申请日：2015-01-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiguo HAO ,  Zhenbin LI ,  Yisong LIU

IPC: H04L12/931 ,  H04L29/12

CPC classification number: H04L49/201 ,  H04L12/185 ,  H04L45/16 ,  H04L61/2069

Abstract: Embodiments of the present invention provide a method, a device, and a system for creating a bidirectional multicast distribution tree based on an interior gateway protocol, the method includes: generating, according to a root address of a first node flooded by the first node through an IGP and a shortest path tree algorithm, a shortest path to another node with the first node as a source node, and constructing a flooding tree according to the shortest path; and when receiving layer 3 multicast group information flooded by an edge node, determining, according to the layer 3 multicast group information and a multicast group range that is supported by the first node, a flooding tree corresponding to each layer 3 multicast group, and performing pruning, according to the layer 3 multicast group information, to the flooding tree corresponding to each layer 3 multicast group, to generate a bidirectional multicast distribution tree.

Abstract translation: 本发明的实施例提供了一种基于内部网关协议来创建双向组播分发树的方法，设备和系统，所述方法包括：根据第一节点淹没的第一节点的根地址通过 IGP和最短路径树算法，到具有第一节点作为源节点的另一节点的最短路径，以及根据最短路径构建洪泛树; 当接收到由边缘节点淹没的第3层组播组信息时，根据第3层组播组信息和第一节点支持的组播组范围，确定与每层3组播组对应的泛洪树，并执行 修剪根据第3层组播组信息，对应于每层3组播组的洪泛树，生成双向组播分发树。