公开(公告)号：US20170171056A1

公开(公告)日：2017-06-15

申请号：US14963470

申请日：2015-12-09

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Lukas Krattiger ,  Xinggang Zhou ,  Di Jin ,  Siu-Man Leung

IPC: H04L12/751 ,  H04L12/721 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L12/66 ,  H04L45/48 ,  H04L45/58 ,  H04L45/64

Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.

公开(公告)号：US09596099B2

公开(公告)日：2017-03-14

申请号：US14705071

申请日：2015-05-06

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/713 ,  H04L29/12

CPC classification number: H04L12/4641 ,  H04L12/4633 ,  H04L45/586 ,  H04L61/103 ,  H04L61/6022 ,  H04L2012/4629

Abstract: 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.

Abstract translation: 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：US09419811B2

公开(公告)日：2016-08-16

申请号：US14255860

申请日：2014-04-17

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Liqin Dong ,  Yibin Yang

IPC: H04L12/18 ,  H04L29/12 ,  H04W4/08 ,  H04L12/46 ,  H04L12/761 ,  H04L12/721

CPC classification number: H04L12/185 ,  H04L12/184 ,  H04L12/189 ,  H04L12/4641 ,  H04L29/12292 ,  H04L45/16 ,  H04L45/38 ,  H04L61/2038 ,  H04L61/2069 ,  H04W4/08

Abstract: A method is provided in one example embodiment and includes establishing a pool of multicast group addresses reserved for assignment to Layer 2 (“L2”) and Layer 3 (“L3”) segment IDs of a network comprising an Internet protocol (“IP”) fabric, and assigning a first multicast group address from the pool to an L3 segment ID of a Virtual Routing and Forwarding element (“VRF”) associated with a new partition established in the network. The method further includes pushing the first multicast group address assignment to a database to provide arguments for configuration profiles, and configuring a new tenant detected on a leaf node of the network using the configuration profiles, in which the configuring comprises specifying multicast group to segment ID assignments for the tenant as specified in the configuration profiles.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括建立保留用于分配给包括因特网协议（“IP”）的网络的层2（“L2”）和第3层（“L3”）段ID的多播组地址池。 并且从池中分配第一组播组地址到与在网络中建立的新分区相关联的虚拟路由和转发元素（“VRF”）的L3段ID。 该方法还包括将第一组播组地址分配推送到数据库以提供用于配置简档的参数，以及使用配置简档配置在网络的叶节点上检测到的新租户，其中，配置包括将多播组指定为段ID 在配置配置文件中指定的租户分配。

公开(公告)号：US20160112314A1

公开(公告)日：2016-04-21

申请号：US14977681

申请日：2015-12-22

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Suran Saminda de Silva ,  Chiajen Tsai ,  Liqin Dong ,  Yibin Yang

IPC: H04L12/741 ,  H04L12/46

CPC classification number: H04L45/74 ,  H04L12/4641 ,  H04L45/54 ,  H04L45/586

Abstract: Packet transmission techniques are disclosed herein. An exemplary method includes receiving a packet that identifies an internet protocol (IP) address assigned to more than one destination node; selecting a virtual routing and forwarding table based, at least in part, on a segmentation identification in the packet; identifying a designated destination node in the packet based, at least in part, on the selected virtual routing and forwarding table; and transmitting the packet to the designated destination node.

Abstract translation: 本文公开了分组传输技术。 一种示例性方法包括接收标识分配给多于一个目的地节点的因特网协议（IP）地址的分组; 至少部分地基于分组中的分段识别来选择虚拟路由和转发表; 至少部分地基于所选择的虚拟路由和转发表来识别分组中的指定目的地节点; 并将该分组发送到指定的目的地节点。

公开(公告)号：US20160080247A1

公开(公告)日：2016-03-17

申请号：US14947134

申请日：2015-11-20

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chiajen Tsai ,  Liqin Dong ,  Shyam Kapadia

IPC: H04L12/721 ,  H04L12/46

CPC classification number: H04L45/124 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/12 ,  H04L45/66

Abstract: An example method for determining an optimal forwarding path across a network having gateways configured to implement a plurality of logical networking protocols can include determining a path cost over a first logical network between each of the gateways and a source node and a path cost over the a second logical network between each of the gateways and a destination node. Additionally, the method can include determining an encapsulation cost difference between switching packets over the first and second logical networks. The method can also include determining an encapsulation overhead metric associated with one of the first or second logical networks, and weighting one of the first or second path cost by the encapsulation overhead metric. Further, the method can include selecting one of the gateways as an optimal gateway. The selection can be based on the computed path costs.

Abstract translation: 用于确定跨越具有被配置为实现多个逻辑网络协议的网关的网络的最佳转发路径的示例性方法可以包括：确定在每个网关与源节点之间的第一逻辑网络上的路径开销，以及在 每个网关和目的地节点之间的第二逻辑网络。 另外，该方法可以包括确定通过第一和第二逻辑网络切换分组之间的封装成本差异。 该方法还可以包括确定与第一或第二逻辑网络之一相关联的封装开销度量，以及通过封装开销度量来加权第一或第二路径开销中的一个。 此外，该方法可以包括选择网关之一作为最佳网关。 选择可以基于计算出的路径成本。

公开(公告)号：US09264351B2

公开(公告)日：2016-02-16

申请号：US14020791

申请日：2013-09-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Suran Saminda de Silva ,  Chiajen Tsai ,  Liqin Dong ,  Yibin Yang

IPC: H04L12/28 ,  H04L12/713 ,  H04L12/741

CPC classification number: H04L45/74 ,  H04L12/4641 ,  H04L45/54 ,  H04L45/586

Abstract: A method is provided in one example and includes receiving, at a receiving node, a packet that comprises information indicative of an internet protocol address and a segmentation identification, selecting a virtual routing and forwarding table corresponding with the segmentation identification, identifying a destination node based, at least in part, on the internet protocol address and the virtual routing and forwarding table, and transmitting the packet to the destination node.

Abstract translation: 在一个示例中提供了一种方法，并且包括在接收节点处接收包括指示因特网协议地址和分段标识的信息的分组，选择与分段标识相对应的虚拟路由和转发表，基于目的节点识别 ，至少部分地在互联网协议地址和虚拟路由和转发表上，并将该分组发送到目的地节点。

公开(公告)号：US20160028557A1

公开(公告)日：2016-01-28

申请号：US14340079

申请日：2014-07-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Liqin Dong ,  Yibin Yang ,  Di Jin ,  Xinggang Zhou ,  Siu-Man Leung

IPC: H04L12/46 ,  H04L12/751

CPC classification number: H04L12/4641 ,  H04L12/4633 ,  H04L45/021 ,  H04L45/08 ,  H04L2012/4629

Abstract: A method is provided in one example embodiment and includes acquiring at a local network element information regarding a remote network element via a control protocol distribution method and refraining from instantiating the remote VTEP for the remote network element on the local network element until unicast traffic from the local network element to the remote network element via an overlay network has begun. The method may further include detecting unicast traffic from the local network element to the remote network element and subsequent to the detecting, instantiating the remote VTEP for the remote network element on the local network element. Some embodiments may include detecting cessation of the unicast traffic from the local network element to the remote network element and subsequent to the detecting cessation, uninstantiating the remote VTEP for the remote network element from the local network element.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括通过控制协议分发方法在本地网络单元获取关于远程网络元件的信息，并且避免对本地网络元件上的远程网元实例化远程VTEP，直到来自 已经开始通过覆盖网络到远程网元的本地网元。 该方法还可以包括检测从本地网络单元到远程网络单元的单播业务，并且在本地网络元件上检测，实例化远程网络元件的远程VTEP之后。 一些实施例可以包括检测从本地网络元件到远程网络元件的停止，并且在检测停止之后，从远离的网络元件的远程VTEP与本地网络元件相抵消。

公开(公告)号：US20150103841A1

公开(公告)日：2015-04-16

申请号：US14577052

申请日：2014-12-19

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chia Tsai ,  Liqin Dong

IPC: H04L12/46

CPC classification number: H04L12/462 ,  H04L45/02 ,  H04L45/586

Abstract: Techniques are presented for distributing host route information of virtual machines to routing bridges (RBridges). A first RBridge receives a routing message that is associated with a virtual machine and is sent by a second RBridge. The routing message comprises of mobility attribute information associated with a mobility characteristic of the virtual machine obtained from an egress RBridge that distributes the routing message. The first RBridge adds a forwarding table attribute to the routing message that indicates whether or not the first RBridge has host route information associated with the virtual machine in a forwarding table of the first RBridge. The first RBridge also distributes the routing message including the mobility attribute information and the forwarding table attribute, to one or more RBridges in the network.

Abstract translation: 介绍了将虚拟机的主机路由信息分发给路由桥（RBridges）的技术。 第一RBridge接收与虚拟机相关联并由第二RBridge发送的路由消息。 路由消息包括与从分发路由消息的出口RBridge获得的虚拟机的移动性特性相关联的移动性属性信息。 第一RBridge向路由消息添加转发表属性，其指示第一RBridge在第一RBridge的转发表中是否具有与虚拟机相关联的主机路由信息。 第一RBridge还将包括移动性属性信息和转发表属性的路由消息分发到网络中的一个或多个RBridge。

公开(公告)号：US20140258485A1

公开(公告)日：2014-09-11

申请号：US13788602

申请日：2013-03-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yibin Yang ,  Liqin Dong ,  Chiajen Tsai

IPC: H04L12/24

CPC classification number: H04L41/12 ,  H04L45/02 ,  H04L45/04 ,  H04L45/16 ,  H04L45/28 ,  H04L45/48

Abstract: A method is provided in one example embodiment and includes establishing at least one fixed topology distribution tree in a network, where the fixed topology distribution tree comprises one root node and a plurality of leaf nodes connected to the root node; maintaining at the root node an indication of multicast group interests advertised by the leaf nodes; and pruning traffic at the root node based on the advertised multicast group interests of the leaf nodes. In one embodiment, the root node is a spine switch and each of the leaf nodes is a leaf switch and each of the leaf nodes is connected to the root node by a single hop.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括在网络中建立至少一个固定拓扑分布树，其中固定拓扑分布树包括连接到根节点的一个根节点和多个叶节点; 在根节点维护叶节点广播的组播组兴趣的指示; 并根据叶节点的广播组播组利益修剪根节点的流量。 在一个实施例中，根节点是脊交换机，并且每个叶节点是叶交换机，并且每个叶节点通过单跳连接到根节点。

公开(公告)号：US20140254590A1

公开(公告)日：2014-09-11

申请号：US13787453

申请日：2013-03-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yibin Yang ,  Chiajen Tsai ,  Liqin Dong ,  Shyam Kapadia

IPC: H04L12/18

CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L45/16

Abstract: A method is provided in one example embodiment and includes determining a route target (“RT”) membership for a network element; determining at least one attribute for the RT membership; and advertising the RT membership with the at least one attribute to other network elements. The at least one attribute may include an RT membership type attribute for indicating whether the RT membership is due to a local virtual network connection, transit support, or both. Additionally or alternatively, the at least one attribute may include a distribution tree binding attribute for indicating a distribution tree for the RT membership.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括确定网络元件的路由目标（“RT”）成员资格; 确定RT成员资格的至少一个属性; 以及将具有至少一个属性的RT成员资格广告到其他网络元件。 所述至少一个属性可以包括用于指示RT成员资格是由于本地虚拟网络连接，中转支持还是两者的RT成员资格类型属性。 另外或替代地，所述至少一个属性可以包括用于指示RT成员资格的分发树的分发树绑定属性。