公开(公告)号：US20160285760A1

公开(公告)日：2016-09-29

申请号：US14670185

申请日：2015-03-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Liqin Dong ,  Yibin Yang

IPC: H04L12/741 ,  H04L12/46 ,  H04L12/713

CPC classification number: H04L45/745 ,  H04L12/4641 ,  H04L12/4666 ,  H04L45/586 ,  H04L49/354

Abstract: A method for programming a MAC address table by a first leaf node in a network comprising a plurality of leaf nodes is provided. Each leaf node comprises one or more Virtual Tunnel End Points (“VTEPs”) and instantiates a plurality of Virtual Routing and Forwarding elements (“VRFs”), with a corresponding Bridge Domain (“BD”) assigned to each VRF. The method includes obtaining information indicating one or more VTEP Affinity Groups (VAGs), each VAG comprising an identification of one VTEP per leaf node, obtaining information indicating assignment of each VRF to one of the VAGs, assigning each VAG to a unique Filtering Identifier (“FID”), thereby generating one or more FIDs, and programming the MAC address table, using FIDs instead of BDs, by populating the MAC address table with a plurality of entries, each entry comprising a unique combination of a FID and a MAC address of a leaf node.

Abstract translation: 提供了一种由包括多个叶节点的网络中的第一叶节点编程MAC地址表的方法。 每个叶节点包括一个或多个虚拟隧道终点（“VTEP”）并且实例化多个虚拟路由和转发元件（“VRF”），以及分配给每个VRF的对应的桥接域（“BD”）。 该方法包括获得指示一个或多个VTEP亲和组（VAG）的信息，每个VAG包括每个叶节点的一个VTEP的标识，获得指示每个VRF分配给VAG之一的信息，将每个VAG分配给唯一的过滤标识符 “FID”），从而生成一个或多个FID，并且通过使用FID而不是BD来编程MAC地址表，通过用多个条目填充MAC地址表，每个条目包括FID和MAC地址的唯一组合 的叶节点。

公开(公告)号：US20160226798A1

公开(公告)日：2016-08-04

申请号：US15095430

申请日：2016-04-11

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Liqin Dong ,  Chia Tsai

IPC: H04L12/931 ,  H04L12/751 ,  H04L12/24

CPC classification number: H04L49/70 ,  H04L41/0813 ,  H04L45/02

Abstract: Techniques are provided for managing movements of virtual machines in a network. At a first switch, a virtual machine (VM) is detected. The VM is hosted by a physical server coupled to the first switch. A message is sent to other switches and it indicates that the VM is hosted by the physical server. When the first switch is paired with a second switch as a virtual port channel (vPC) pair, the message includes a switch identifier that identifies the second switch. A receiving switch receives the message from a source switch in the network comprising a route update associated with the VM. A routing table of the receiving switch is evaluated to determine whether the host route is associated with a server facing the physical port. The message is examined to determine it contains the switch identifier.

Abstract translation: 提供技术来管理网络中的虚拟机的移动。 在第一交换机处，检测虚拟机（VM）。 VM由耦合到第一交换机的物理服务器托管。 一条消息被发送到其他交换机，它表示该虚拟机由物理服务器托管。 当第一交换机与第二交换机配对作为虚拟端口信道（vPC）对时，消息包括标识第二交换机的交换机标识符。 接收交换机从网络中的源交换机接收包括与VM关联的路由更新的消息。 评估接收交换机的路由表以确定主机路由是否与面向物理端口的服务器相关联。 检查该消息以确定其包含交换机标识符。

公开(公告)号：US20160134513A1

公开(公告)日：2016-05-12

申请号：US14535665

申请日：2014-11-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yibin Yang ,  Liqin Dong ,  Alex Tsai ,  Rajagopalan Janakiraman

IPC: H04L12/761 ,  H04L29/08 ,  H04L12/947

CPC classification number: H04L45/16 ,  H04L49/25 ,  H04L69/325

Abstract: Coordinating gateways for multi-destination traffic across a TRILL fabric and a VXLAN/IP fabric with a plurality of TRILL IS-IS TLVs and a plurality of Layer 3 IS-IS TLVs is provided herein. The plurality of TRILL IS-IS TLVs and the plurality of Layer 3 IS-IS TLVs effectuate: grafting an IP multicast share tree with a plurality of TRILL distribution trees at only one of a plurality of gateways in a network interworking a TRILL fabric and a VXLAN/IP fabric; ensuring that multicast traffic traversing from the plurality of TRILL distribution trees is not looped back to the TRILL fabric through the VXLAN/IP fabric; restoring connectivity among a plurality of VXLAN/IP fabric partitions through the TRILL fabric if the VXLAN/IP fabric is partitioned; and restoring connectivity among a plurality of TRILL fabric partitions through the VXLAN/IP fabric if the TRILL fabric is partitioned.

Abstract translation: 本文提供了通过TRILL结构和具有多个TRILL IS-IS TLV和多个第三层IS-IS TLV的VXLAN / IP架构的多目的地业务的协调网关。 多个TRILL IS-IS TLV和多个第3层IS-IS TLV实现：在与TRILL结构互通的网络中的多个网关中的一个网关处移植具有多个TRILL分发树的IP多播共享树， VXLAN / IP fabric; 确保从多个TRILL分发树中穿过的多播流量不会通过VXLAN / IP结构循环回TRILL结构; 如果VXLAN / IP结构被分区，则通过TRILL结构恢复多个VXLAN / IP架构分区之间的连接; 并且如果分区了TRILL结构，则通过VXLAN / IP结构恢复多个TRILL结构分区之间的连接。

公开(公告)号：US09203738B2

公开(公告)日：2015-12-01

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。

公开(公告)号：US20150304117A1

公开(公告)日：2015-10-22

申请号：US14255860

申请日：2014-04-17

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang

IPC: H04L12/18 ,  H04W4/08

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：US20150180722A1

公开(公告)日：2015-06-25

申请号：US14266395

申请日：2014-04-30

Applicant: CISCO TECHNOLOGY, INC.

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

IPC: H04L12/24

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：US20150117188A1

公开(公告)日：2015-04-30

申请号：US14582085

申请日：2014-12-23

Applicant: Cisco Technology, Inc.

Inventor： Yuchen Zhou ,  Chia Alex Tsai ,  Yibin Yang ,  Rajagopalan Janakiraman

IPC: H04L12/841 ,  H04L12/709 ,  H04L12/26 ,  H04L12/801

CPC classification number: H04L47/28 ,  H04L43/0852 ,  H04L45/245 ,  H04L47/12 ,  H04L47/30 ,  H04L47/323 ,  Y02D50/30

Abstract: In one embodiment, a period between periodic transmissions of protocol data units (PDUs) used to form or maintain a link aggregation group is initially set to a fixed value. When a stress condition is detected, the period between periodic transmissions of PDUs is increased from the initial value. When the stress condition is determined to have eased, the period between periodic transmissions of PDUs is reduced back toward the fixed value.

Abstract translation: 在一个实施例中，用于形成或维护链路聚合组的协议数据单元（PDU）的周期性传输之间的周期被初始设置为固定值。 当检测到应力条件时，PDU的周期性传输之间的周期从初始值增加。 当应力条件被确定为缓解时，PDU的周期性传输之间的时间间隔减小到固定值。

公开(公告)号：US20140161131A1

公开(公告)日：2014-06-12

申请号：US13711919

申请日：2012-12-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yibin Yang ,  Alex Tsai ,  Vinay Parameswarannair

IPC: H04L12/56

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：US20140101336A1

公开(公告)日：2014-04-10

申请号：US13647909

申请日：2012-10-09

Applicant: Cisco Technology, Inc.

Inventor： Yibin Yang ,  Chiajen Tsai ,  Liqin Dong

IPC: G06F15/173

CPC classification number: H04L45/02 ,  H04L45/04

Abstract: A method is provided in one example embodiment and includes determining whether a first network element with which a second network element is attempting to establish an adjacency is a client type element. If the first network element is determined to be a client type element, the method further includes determining whether the first and second network elements are in the same network area. If the first network element is a client type element and the first and second network elements are determined to be in the same network area, the adjacency is established. Subsequent to the establishing, a determination is made whether the first network element includes an inter-area forwarder (IAF).

Abstract translation: 在一个示例实施例中提供了一种方法，并且包括确定第二网络元件正在尝试建立邻接的第一网络元件是否是客户端类型元件。 如果第一网络元素被确定为客户端类型元素，则该方法还包括确定第一和第二网络元件是否在相同的网络区域中。 如果第一网络元素是客户端类型元素，并且第一和第二网络元素被确定为在相同的网络区域中，则建立邻接关系。 在建立之后，确定第一网络元件是否包括区域间转发器（IAF）。