公开(公告)号：US09503325B2

公开(公告)日：2016-11-22

申请号：US14080916

申请日：2013-11-15

Applicant: Cisco Technology, Inc.

Inventor： Vipin Jain ,  Suran Saminda de Silva ,  Chiajen Tsai ,  Debashis Patnala Rao ,  Yibin Yang ,  Palathingal Frank ,  Shyam Kapadia ,  Vijay Gopal Krishnan

IPC: H04L12/24 ,  H04L12/46

CPC classification number: H04L41/0816 ,  H04L12/467 ,  H04L12/4675

Abstract: A leaf switch of a switch fabric includes multiple ports to connect with respective ones of multiple servers. Virtual local area networks (VLANs) are configured on the leaf switch. Dynamic creation of virtual ports is enabled on the leaf switch for at least one of the VLANs on an as needed basis. The leaf switch receives from a particular server connected to a corresponding one of the ports a notification message that a virtual machine is hosted on the particular server. Responsive to the notification message, the leaf switch dynamically creates a virtual port that associates the corresponding one of the ports with the at least one of the VLANs.

Abstract translation: 交换结构的叶片交换机包括多个端口，用于与多个服务器中的相应服务器进行连接。 虚拟局域网（VLAN）在叶片交换机上配置。 根据需要，在叶片交换机上为至少一个VLAN启用动态创建虚拟端口。 叶片交换机从连接到对应的一个端口的特定服务器接收虚拟机托管在特定服务器上的通知消息。 响应于通知消息，叶片交换机动态地创建将对应的一个端口与至少一个VLAN相关联的虚拟端口。

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：US09413612B2

公开(公告)日：2016-08-09

申请号：US14264856

申请日：2014-04-29

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Rick Chang ,  Yibin Yang ,  Rajesh Babu Nataraja

IPC: H04L12/24 ,  H04L12/46 ,  H04L12/931

CPC classification number: H04L12/4641 ,  H04L12/4625 ,  H04L12/4633 ,  H04L41/0803 ,  H04L41/0816 ,  H04L41/12 ,  H04L41/26 ,  H04L45/48 ,  H04L49/354

Abstract: In accordance with one example embodiment, there is provided a system configured for virtual local area network (VLAN) blocking on a virtual port channel (vPC) member link to handle discrepant virtual network instance (VNI) to VLAN mappings. In other embodiments, the system can be configured for providing Virtual Switch Interface Discovery Protocol (VDP) and virtual switch enhancements to accommodate discrepant VNI to VLAN mappings. In another example embodiment, an apparatus is provided that includes a processor, and a memory coupled to the processor, where the apparatus is configured such that if a server is connected through a virtual port channel, a VDP is used to notify the server of different VNI to VLAN mappings. In another embodiment, the apparatus can extend a VDP Filter Info Field to carry a set of VLANs mapped to a VNI, keyed by leaf MAC addresses that serve as bridge identifiers.

Abstract translation: 根据一个示例性实施例，提供了一种配置用于虚拟端口信道（vPC）成员链路上的虚拟局域网（VLAN）阻塞的系统，以处理与VLAN映射不符的虚拟网络实例（VNI）。 在其他实施例中，可以将系统配置为提供虚拟交换机接口发现协议（VDP）和虚拟交换机增强，以适应不符合VNI的VLAN映射。 在另一个示例实施例中，提供了一种包括处理器和耦合到处理器的存储器的装置，其中，所述装置被配置为使得如果通过虚拟端口信道连接服务器，则使用VDP来通知服务器不同的 VNI到VLAN映射。 在另一个实施例中，该设备可以扩展VDP过滤器信息字段以携带映射到VNI的一组VLAN，由作为桥标识符的叶MAC地址键入。

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：US09143442B2

公开(公告)日：2015-09-22

申请号：US13711919

申请日：2012-12-12

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Alex Tsai ,  Vinay Parameswarannair

IPC: H04L12/741 ,  H04L12/801 ,  H04L12/46

CPC classification number: H04L45/54 ,  H04L12/4641 ,  H04L12/4658 ,  H04L47/12

Abstract: A segment within a virtual network is identified as being supported by a segment bundling device. The segment within the virtual network supports a first host connected to a first bridging device and a second host connected to a second bridging device. The segment bundling device is used to receive virtual network address information describing the virtual network segmentation identifier (ID) for the segment used for receiving virtual network traffic for the first and second host. A segment bundling table associating a bundle ID with the virtual network segmentation identifier based on the upper ID and the lower ID of the virtual network ID is generated by the segment bundling device. The segment bundling device is used to distribute the segment bundling table to traffic forwarding devices in the virtual network that interface with the first bridging device and the second bridging device.

Abstract translation: 虚拟网络中的段被识别为由段捆绑设备支持。 虚拟网络内的段支持连接到第一桥接设备的第一主机和连接到第二桥接设备的第二主机。 分段捆绑设备用于接收描述用于接收第一和第二主机的虚拟网络业务的分段的虚拟网络分段标识符（ID）的虚拟网络地址信息。 通过分段捆绑装置生成基于虚拟网络ID的上部ID和下部ID，将捆绑ID与虚拟网络分段标识符相关联的分段捆绑表。 分段捆绑设备用于将分组捆绑表分配到与第一桥接设备和第二桥接设备接口的虚拟网络中的流量转发设备。

公开(公告)号：US09130775B2

公开(公告)日：2015-09-08

申请号：US13939079

申请日：2013-07-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Dileep K. Devireddy ,  Shyam Kapadia ,  Yibin Yang

IPC: H04L12/46 ,  H04L12/24 ,  H04L12/56

CPC classification number: H04L12/4641 ,  H04L41/0893 ,  H04L45/741

Abstract: A method is provided in one example embodiment and includes establishing a virtual trunk link between a first network element and a second network element. The first and second network elements are located at a first site and the first site and a second site comprise at least a portion of an overlay network. The method further includes receiving data traffic at the first network element, which data traffic is associated with a segment of the overlay network, and mapping a first network identifier allocated to the overlay network segment at the first network element to a virtual trunk link and a VLAN ID. The method additionally includes forwarding the data traffic from the first network element to the second network element via the virtual trunk link with the VLAN ID.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括在第一网络元件和第二网络元件之间建立虚拟中继线链路。 第一和第二网络元件位于第一站点，并且第一站点和第二站点包括覆盖网络的至少一部分。 该方法还包括在第一网络元件处接收数据业务，哪个数据业务与覆盖网络的一个段相关联，以及将分配给第一网元的覆盖网段的第一网络标识符映射到虚拟中继链路，以及 VLAN ID。 该方法还包括经由具有VLAN ID的虚拟中继链路将数据业务从第一网元转发到第二网元。

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：US20150016300A1

公开(公告)日：2015-01-15

申请号：US13939079

申请日：2013-07-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Dileep K. Devireddy ,  Shyam Kapadia ,  Yibin Yang

IPC: H04L12/24 ,  H04L12/56

CPC classification number: H04L12/4641 ,  H04L41/0893 ,  H04L45/741

Abstract: A method is provided in one example embodiment and includes establishing a virtual trunk link between a first network element and a second network element. The first and second network elements are located at a first site and the first site and a second site comprise at least a portion of an overlay network. The method further includes receiving data traffic at the first network element, which data traffic is associated with a segment of the overlay network, and mapping a first network identifier allocated to the overlay network segment at the first network element to a virtual trunk link and a VLAN ID. The method additionally includes forwarding the data traffic from the first network element to the second network element via the virtual trunk link with the VLAN ID.

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括在第一网络元件和第二网络元件之间建立虚拟中继线链路。 第一和第二网络元件位于第一站点，并且第一站点和第二站点包括覆盖网络的至少一部分。 该方法还包括在第一网络元件处接收数据业务，哪个数据业务与覆盖网络的一个段相关联，以及将分配给第一网元的覆盖网段的第一网络标识符映射到虚拟中继链路，以及 VLAN ID。 该方法还包括经由具有VLAN ID的虚拟中继链路将数据业务从第一网元转发到第二网元。

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。