公开(公告)号：US09503277B2

公开(公告)日：2016-11-22

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: H04L12/28 ,  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：US09203749B2

公开(公告)日：2015-12-01

申请号：US13904065

申请日：2013-05-29

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chiajen Tsai ,  Liqin Dong

IPC: H04L12/721 ,  H04L12/753

CPC classification number: H04L45/66 ,  H04L45/48

Abstract: An example method for calculating a constrained distribution tree in a TRILL network including a plurality of VL and FGL RBridges can include learning an FGL multi-destination frame filtering capability of at least one of the FGL RBridges in the TRILL network, constructing a sub-graph including the FGL RBridges and associated links and calculating at least one sub-tree based on the sub-graph. The method can also include constructing a graph including VL RBridges, the FGL RBridges and associated links by adding links between the VL RBridges and the FGL RBridges. The FGL RBridge to which the VL RBridge is linked can have sufficient FGL multi-destination frame filtering capability. Further, the method can include calculating a constrained distribution tree based on the graph by treating the sub-tree as a logical node.

Abstract translation: 用于计算包括多个VL和FGL RBridge的TRILL网络中的约束分布树的示例方法可以包括学习TRILL网络中的至少一个FGL RBridge的FGL多目的地帧过滤能力，构建子图 包括FGL RBridge和相关联的链接，并且基于子图计算至少一个子树。 该方法还可以包括通过在VL RBridge和FGL RBridge之间添加链接来构建包括VL RBridge，FGL RBridge和相关链接的图。 VL RBridge链接到的FGL RBridge可以具有足够的FGL多目标帧过滤功能。 此外，该方法可以包括通过将子树视为逻辑节点来基于该图来计算约束分布树。

公开(公告)号：US20150071286A1

公开(公告)日：2015-03-12

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: H04L12/741

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：US08953624B2

公开(公告)日：2015-02-10

申请号：US13721781

申请日：2012-12-20

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chia Tsai ,  Liqin Dong

IPC: H04L12/28 ,  H04L12/713

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：US20140355475A1

公开(公告)日：2014-12-04

申请号：US13904065

申请日：2013-05-29

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chiajen Tsai ,  Liqin Dong

IPC: H04L12/721 ,  H04L12/751

CPC classification number: H04L45/66 ,  H04L45/48

Abstract: An example method for calculating a constrained distribution tree in a TRILL network including a plurality of VL and FGL RBridges can include learning an FGL multi-destination frame filtering capability of at least one of the FGL RBridges in the TRILL network, constructing a sub-graph including the FGL RBridges and associated links and calculating at least one sub-tree based on the sub-graph. The method can also include constructing a graph including VL RBridges, the FGL RBridges and associated links by adding links between the VL RBridges and the FGL RBridges. The FGL RBridge to which the VL RBridge is linked can have sufficient FGL multi-destination frame filtering capability. Further, the method can include calculating a constrained distribution tree based on the graph by treating the sub-tree as a logical node.

Abstract translation: 用于计算包括多个VL和FGL RBridge的TRILL网络中的约束分布树的示例方法可以包括学习TRILL网络中的至少一个FGL RBridge的FGL多目的地帧过滤能力，构建子图 包括FGL RBridge和相关联的链接，并且基于子图计算至少一个子树。 该方法还可以包括通过在VL RBridge和FGL RBridge之间添加链接来构建包括VL RBridge，FGL RBridge和相关链接的图。 VL RBridge链接到的FGL RBridge可以具有足够的FGL多目标帧过滤功能。 此外，该方法可以包括通过将子树视为逻辑节点来基于该图来计算约束分布树。

公开(公告)号：US20140348166A1

公开(公告)日：2014-11-27

申请号：US13898572

申请日：2013-05-21

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/721

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 VxLAN gateways configured to implement both FGL networking and VxLAN capabilities can include learning RBridge nicknames associated with the VxLAN gateways in the network. Additionally, the method can include determining a path cost over the FGL network between each of the VxLAN gateways and a source node and a path cost over the VxLAN between each of the VxLAN gateways and a destination node. Further, the method can include determining an encapsulation overhead metric associated with the VxLAN and selecting one of the VxLAN gateways as an optimal VxLAN gateway. The selection can be based on the computed path costs over the FGL network and the VxLAN and the encapsulation overhead metric.

Abstract translation: 用于确定具有配置为实现FGL组网和VxLAN能力的VxLAN网关的网络的最佳转发路径的示例性方法可以包括学习与网络中的VxLAN网关相关联的RBridge昵称。 另外，该方法可以包括确定每个VxLAN网关和源节点之间的FGL网络上的路径开销以及每个VxLAN网关与目的地节点之间的VxLAN上的路径开销。 此外，该方法可以包括确定与VxLAN相关联的封装开销度量并且选择VxLAN网关之一作为最佳VxLAN网关。 该选择可以基于计算出的在FGL网络和VxLAN上的路径开销以及封装开销度量。