公开(公告)号：US09641417B2

公开(公告)日：2017-05-02

申请号：US14570821

申请日：2014-12-15

申请人： CISCO TECHNOLOGY, INC.

发明人： Yuefeng Jiang ,  Xiaopu Zhang ,  Fang Yang

IPC分类号： H04L12/26 ,  H04L29/06 ,  H04L12/751

CPC分类号： H04L43/12 ,  H04L43/062 ,  H04L43/0817 ,  H04L43/10 ,  H04L45/026 ,  H04L69/28

摘要： In one embodiment, a method includes receiving a packet from a host at a first hop router in a network site, the first hop router in communication with a core network and operable to encapsulate packets received from the host for transmission to a remote network site, setting a status for the host in a table at the first hop router as active, starting a timer for the host at the first hop router, transmitting a probe message from the first hop router to the host if a packet is not received at the first hop router from the host before the timer expires, updating the status of the host at the table based on whether a response message is received from the host, and using the host status to detect host migration. An apparatus and logic are also disclosed herein.

公开(公告)号：US20160330046A1

公开(公告)日：2016-11-10

申请号：US14705071

申请日：2015-05-06

申请人： Cisco Technology, Inc.

发明人： Yibin Yang ,  Liqin Dong ,  Chia Tsai ,  Weng Hong Chan ,  Yuchen Zhou ,  Fang Yang ,  Jeffrey Cai ,  Yuefeng Jiang ,  Xiaopu Zhang

IPC分类号： H04L12/46 ,  H04L29/12 ,  H04L12/713

CPC分类号： H04L12/4641 ,  H04L12/4633 ,  H04L45/586 ,  H04L61/103 ,  H04L61/6022 ,  H04L2012/4629

摘要： Techniques provided herein use aggregate endpoints in a virtual overlay network. In general, aggregate endpoints operate as a single receiving entity for certain packets/frames sent between different physical proximities of the virtual overlay network.

摘要翻译： 本文提供的技术使用虚拟覆盖网络中的聚合端点。 通常，聚合端点作为在虚拟覆盖网络的不同物理邻域之间发送的某些分组/帧的单个接收实体操作。

公开(公告)号：US20160173356A1

公开(公告)日：2016-06-16

申请号：US14570821

申请日：2014-12-15

申请人： CISCO TECHNOLOGY, INC.

发明人： Yuefeng Jiang ,  Xiaopu Zhang ,  Fang Yang

IPC分类号： H04L12/26 ,  H04L12/741 ,  H04L29/06 ,  H04L12/733

CPC分类号： H04L43/12 ,  H04L43/062 ,  H04L43/0817 ,  H04L43/10 ,  H04L45/026 ,  H04L69/28

摘要： In one embodiment, a method includes receiving a packet from a host at a first hop router in a network site, the first hop router in communication with a core network and operable to encapsulate packets received from the host for transmission to a remote network site, setting a status for the host in a table at the first hop router as active, starting a timer for the host at the first hop router, transmitting a probe message from the first hop router to the host if a packet is not received at the first hop router from the host before the timer expires, updating the status of the host at the table based on whether a response message is received from the host, and using the host status to detect host migration. An apparatus and logic are also disclosed herein.

摘要翻译： 在一个实施例中，一种方法包括从网络站点中的第一跳路由器处接收来自主机的分组，所述第一跳​​跃路由器与核心网络通信并且可操作以将从所述主机接收的分组封装以传输到远程网络站点， 将第一跳路由器的表中的主机的状态设置为活动状态，在第一跳路由器上启动主机的定时器，如果第一跳路由器上没有接收到分组，则将探测消息从第一跳路由器发送到主机 根据主机是否收到响应消息，并使用主机状态来检测主机迁移，在定时器到期之前从主机跳转路由器，更新主机在表中的状态。 本文还公开了一种装置和逻辑。

公开(公告)号：US10530735B2

公开(公告)日：2020-01-07

申请号：US14850090

申请日：2015-09-10

申请人： Cisco Technology, Inc.

发明人： Xiaopu Zhang ,  Yuefeng Jiang ,  Fang Yang

IPC分类号： H04L29/12 ,  H04L29/08 ,  H04L12/751

摘要： A network device may receive a request seeking a location identifier for an endpoint identifier from a first router. The network device may determine that the endpoint identifier belongs to a dynamic endpoint identifier range associated with a plurality of routers. The request may be forwarded to the plurality of routers to discover a host having the endpoint identifier and a notification may be received from one of the plurality of routers reporting discovery of the host having the endpoint identifier. The network device may send an identifier of the one of the plurality of routers which reports discovery of the host to the first router as the location identifier for the endpoint identifier.

公开(公告)号：US09503272B2

公开(公告)日：2016-11-22

申请号：US14209744

申请日：2014-03-13

申请人： CISCO TECHNOLOGY, INC.

发明人： Fang Yang ,  Kathy Xia Ke ,  Isidoros Kouvelas ,  Christian Cassar

IPC分类号： H04L12/56 ,  H04L12/18

CPC分类号： H04L12/185

摘要： In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.

摘要翻译： 在一个实施例中，一种方法包括在第一网络中的第一边缘设备发现组播源已经从第一网络移动到第二网络，第一边缘设备通过核心网络与多个边缘设备属于 包括所述组播源的组播组，从所述第一边缘设备向所述第二网络中的第二边缘设备发送包括所述组播源在内的所述多播组的加入请求，所述多播组在所述第二网络处包括所述多播组， 在从第二边缘设备延伸到多个边缘设备的瞬时多播树上，将多播流量转发到多个边缘设备。 本文还公开了一种装置和逻辑。

公开(公告)号：US20150263864A1

公开(公告)日：2015-09-17

申请号：US14209744

申请日：2014-03-13

申请人： CISCO TECHNOLOGY, INC.

发明人： Fang Yang ,  Kathy Xia Ke ,  Isidoros Kouvelas ,  Christian Cassar

IPC分类号： H04L12/18

CPC分类号： H04L12/185

摘要： In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.

摘要翻译： 在一个实施例中，一种方法包括在第一网络中的第一边缘设备发现组播源已经从第一网络移动到第二网络，第一边缘设备通过核心网络与多个边缘设备属于 包括所述组播源的组播组，从所述第一边缘设备向所述第二网络中的第二边缘设备发送包括所述组播源在内的所述多播组的加入请求，所述多播组在所述第二网络处包括所述多播组， 在从第二边缘设备延伸到多个边缘设备的瞬时多播树上，将多播流量转发到多个边缘设备。 本文还公开了一种装置和逻辑。

公开(公告)号：US10985942B2

公开(公告)日：2021-04-20

申请号：US16557065

申请日：2019-08-30

申请人： Cisco Technology, Inc.

发明人： Xiaorong Wang ,  Yicheng Liu ,  Lianxiang Wang ,  Fang Yang ,  Gaofeng Tao ,  Ijsbrand Wijnands

IPC分类号： H04L12/753 ,  H04L12/781 ,  H04L12/761 ,  H04L12/44 ,  H04L12/46

摘要： Methods and network devices are disclosed for multicast traffic steering in a communications network. In one embodiment, a method includes receiving, at a node in a network, a multicast message comprising an incoming message bit array and a tree identifier value. The embodiment further includes selecting a bit indexed forwarding table stored at the node and corresponding to the tree identifier value, accessing within the selected forwarding table an entry corresponding to an intended destination node for the message, and forwarding, to a neighboring node identified in the accessed entry, a copy of the message comprising a forwarded message bit array in place of the incoming message bit array. An embodiment of a network device includes one or more network interfaces and a processor adapted to perform steps of the method.

公开(公告)号：US20190386848A1

公开(公告)日：2019-12-19

申请号：US16557065

申请日：2019-08-30

申请人： Cisco Technology, Inc.

发明人： Xiaorong Wang ,  Yicheng Liu ,  Lianxiang Wang ,  Fang Yang ,  Gaofeng Tao ,  Ijsbrand Wijnands

IPC分类号： H04L12/44

摘要： Methods and network devices are disclosed for multicast traffic steering in a communications network. In one embodiment, a method includes receiving, at a node in a network, a multicast message comprising an incoming message bit array and a tree identifier value. The embodiment further includes selecting a bit indexed forwarding table stored at the node and corresponding to the tree identifier value, accessing within the selected forwarding table an entry corresponding to an intended destination node for the message, and forwarding, to a neighboring node identified in the accessed entry, a copy of the message comprising a forwarded message bit array in place of the incoming message bit array. An embodiment of a network device includes one or more network interfaces and a processor adapted to perform steps of the method.

公开(公告)号：US10432425B2

公开(公告)日：2019-10-01

申请号：US15487626

申请日：2017-04-14

申请人： Cisco Technology, Inc.

发明人： Xiaorong Wang ,  Yicheng Liu ,  Lianxiang Wang ,  Fang Yang ,  Gaofeng Tao ,  Ijsbrand Wijnands

IPC分类号： H04L12/753 ,  H04L12/781 ,  H04L12/761 ,  H04L12/44 ,  H04L12/46

摘要： Methods and network devices are disclosed for internet protocol (IP) based encapsulation in bit indexed explicit replication (BIER) forwarding. In one embodiment, a method includes receiving a multicast message comprising an inner IP header, an intervening header, and an outer IP header. The embodiment further includes accessing a message bit array stored in the intervening header, retrieving an IP address from an entry in a bit indexed forwarding table, replacing an IP destination address in the outer IP header of a copy of the multicast message with the retrieved IP address, and sending the copy of the multicast message toward a second node in the network, where the retrieved IP address is assigned to the second node. An embodiment of a network device includes a processor operably coupled to a plurality of storage locations and to one or more network interfaces and adapted to perform steps of the method.

公开(公告)号：US20180287935A1

公开(公告)日：2018-10-04

申请号：US15487626

申请日：2017-04-14

申请人： Cisco Technology, Inc.

发明人： Xiaorong Wang ,  Yicheng Liu ,  Lianxiang Wang ,  Fang Yang ,  Gaofeng Tao ,  Ijsbrand Wijnands

IPC分类号： H04L12/753 ,  H04L12/44 ,  H04L12/761

CPC分类号： H04L12/44 ,  H04L12/4625 ,  H04L12/4633 ,  H04L2212/00

摘要： Methods and network devices are disclosed for internet protocol (IP) based encapsulation in bit indexed explicit replication (BIER) forwarding. In one embodiment, a method includes receiving a multicast message comprising an inner IP header, an intervening header, and an outer IP header. The embodiment further includes accessing a message bit array stored in the intervening header, retrieving an IP address from an entry in a bit indexed forwarding table, replacing an IP destination address in the outer IP header of a copy of the multicast message with the retrieved IP address, and sending the copy of the multicast message toward a second node in the network, where the retrieved IP address is assigned to the second node. An embodiment of a network device includes a processor operably coupled to a plurality of storage locations and to one or more network interfaces and adapted to perform steps of the method.