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：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）。

公开(公告)号：US11477092B2

公开(公告)日：2022-10-18

申请号：US16930947

申请日：2020-07-16

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Liqin Dong ,  Lukas Krattiger

IPC: H04L41/14 ,  H04L45/02 ,  H04L9/32 ,  H04L9/08 ,  H04L45/64

Abstract: Techniques for utilizing a Software-Defined-Networking (SDN) controller and/or a Data Center Network Manager (DCNM) and network border gateway switches associated with a multi-site cloud computing network to provide reachability data indicating physical links between the border gateways disposed in different sites of the multi-site network to establish secure connection tunnels utilizing the physical links and unique encryption keys. The SDN controller and/or DCNM may be configured to generate a physical underlay model representing the physical underlay, or network transport capabilities, and/or a logical overlay model representing a logical overlay, or overlay control-plane, of the multi-site network. The SDN controller may also generate an encryption key model representing the associations between the encryption keys and the physical links between the associated network border gateway switches. The SDN controller may utilize the models to determine route paths for transmitting network traffic spanning over different sites of the multi-site network at line speed.

公开(公告)号：US11115375B2

公开(公告)日：2021-09-07

申请号：US16577330

申请日：2019-09-20

Applicant: Cisco Technology, Inc.

Inventor： Rex Emmauel Fernando ,  Victor Manuel Moreno ,  Shyam Kapadia ,  Liqin Dong ,  Murali Venkateshaiah

IPC: H04L29/12 ,  H04L12/46 ,  H04L12/24

Abstract: A system and a method are disclosed for enabling interoperability between data plane learning endpoints and control plane learning endpoints in an overlay network environment. An exemplary method for managing network traffic in the overlay network environment includes receiving network packets in an overlay network from data plane learning endpoints and control plane learning endpoints, wherein the overlay network extends Layer 2 network traffic over a Layer 3 network; operating in a data plane learning mode when a network packet is received from a data plane learning endpoint; and operating in a control plane learning mode when the network packet is received from a control plane learning endpoint. Where the overlay network includes more than one overlay segment, the method further includes operating as an anchor node for routing inter-overlay segment traffic to and from hosts that operate behind the data plane learning endpoints.

公开(公告)号：US10326694B2

公开(公告)日：2019-06-18

申请号：US15161636

申请日：2016-05-23

Applicant: Cisco Technology, Inc.

Inventor： Victor Moreno ,  Shyam Kapadia ,  Murali Venkateshaiah ,  John Lo ,  Liqin Dong

IPC: H04L12/715 ,  H04H20/26 ,  H04L12/46 ,  H04L12/753 ,  H04L12/741 ,  H04L12/761 ,  H04L12/18

Abstract: Presented herein are hybrid approaches to multi-destination traffic forwarding in overlay networks that can be used to facilitate interoperability between head-end-replication-support network devices (i.e., those that only use head-end-replication) and multicast-support network devices (i.e., those that only use native multicast). By generally using existing tunnel end-points (TEPs) supported functionality for sending multi-destination traffic and enhancing the TEPs to receive multi-destination traffic with the encapsulation scheme they do not natively support, the presented methods and systems minimize the required enhancements to achieve interoperability and circumvents any hard limitations that the end-point hardware may have. The present methods and systems may be used with legacy hardware that are commissioned or deployed as well as new hardware that are configured with legacy protocols.

公开(公告)号：US10298490B2

公开(公告)日：2019-05-21

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: H04L29/06 ,  H04L12/721 ,  H04L12/46 ,  H04L12/66 ,  H04L12/715 ,  H04L12/775 ,  H04L12/753

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：US10116559B2

公开(公告)日：2018-10-30

申请号：US15711812

申请日：2017-09-21

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Liqin Dong ,  Yibin Yang

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/721 ,  H04L12/24 ,  H04L12/741

Abstract: Systems, methods, and computer-readable media for OAM in overlay networks. In response to receiving a packet associated with an OAM operation from a device in an overlay network, the system generates an OAM packet. The system can be coupled with the overlay network and can include a tunnel endpoint interface associated with an underlay address and a virtual interface associated with an overlay address. The overlay address can be an anycast address assigned to the system and another device in the overlay network. Next, the system determines that a destination address associated with the packet is not reachable through the virtual interface, the destination address corresponding to a destination node in the overlay network. The system also determines that the destination address is reachable through the tunnel endpoint interface. The system then provides the underlay address associated with the tunnel endpoint interface as a source address in the OAM packet.