公开(公告)号：US20150063353A1

公开(公告)日：2015-03-05

申请号：US14018134

申请日：2013-09-04

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Puto H. Subagio ,  Yibin Yang ,  Nilesh Shah ,  Vipin Jain ,  Ashutosh Agrawal

IPC: H04L12/741 ,  H04L12/56

CPC classification number: H04L45/745 ,  H04L45/741

Abstract: An example method for implementation of virtual extensible local area network (VXLAN) in top-of-rack (ToR) switches in a network environment is provided and includes receiving a packet encapsulated with a VXLAN header having an unknown virtual tunnel endpoint (VTEP) Internet Protocol (IP) address in a network environment, and installing an entry at an index location of a forwarding table. The index location includes an encoding of the VTEP-IP address as a VTEP index (VTEP-IDX), and the entry maps a VXLAN interface to an IP address associated with a VXLAN network interface (VNI). In specific embodiments, the VTEP-IDX is logN bits, where N is a size of the forwarding table. The forwarding table indicates a destination VTEP IP address when encapsulating the packet, and the source VTEP IP address when decapsulating the packet.

Abstract translation: 提供了一种用于在网络环境中在机架（ToR）交换机中实现虚拟可扩展局域网（VXLAN）的示例性方法，包括接收使用具有未知虚拟隧道端点（VTEP）Internet的VXLAN头封装的分组 网络环境中的协议（IP）地址，以及在转发表的索引位置安装条目。 索引位置包括作为VTEP索引（VTEP-IDX）的VTEP-IP地址的编码，并且该条目将VXLAN接口映射到与VXLAN网络接口（VNI）相关联的IP地址。 在具体实施例中，VTEP-IDX是logN比特，其中N是转发表的大小。 转发表在封装数据包时指示目标VTEP IP地址，解封装数据包时的源VTEP IP地址。

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。

公开(公告)号：US20140177640A1

公开(公告)日：2014-06-26

申请号：US13721781

申请日：2012-12-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yibin Yang ,  Chia Tsai ,  Liqin Dong

IPC: H04L12/56

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：US20210240541A1

公开(公告)日：2021-08-05

申请号：US17238617

申请日：2021-04-23

Applicant: Cisco Technology, Inc.

Inventor： Timothy J Kuik ,  Sumit Kala ,  Yibin Yang ,  Hemanth Basappa Mallikarjunaswamy

IPC: G06F9/50 ,  G06F9/455 ,  H04L29/08

Abstract: This disclosure describes techniques for providing virtual resources (e.g., containers, virtual machines, etc.) of a clustered application with information regarding a cluster of physical servers on which the distributed clustered application is running. A virtual resource that supports the clustered application is executed on a physical server of the cluster of physical servers. The virtual resource may receive an indication of a database instance (or other application) running on a particular physical server of the cluster of physical servers that is nearest the physical server. The database instance may be included in a group of database instances that are maintaining a common data set on respective physical servers of the group of physical servers. The virtual resource may then access the database instance on the particular physical server based at least in part on the database instance running on the particular server that is nearest the physical server.

公开(公告)号：US10931629B2

公开(公告)日：2021-02-23

申请号：US16236757

申请日：2018-12-31

Applicant: Cisco Technology, Inc.

Inventor： Vijay Chander ,  Yibin Yang ,  Praveen Jain ,  Munish Mehta

IPC: H04L29/12 ,  H04L12/46 ,  H04L12/751

Abstract: According to one or more embodiments of this disclosure, a network controller in a data center network establishes a translation table for in-band traffic in a data center network, the translation table resolves ambiguous network addresses based on one or more of a virtual network identifier (VNID), a routable tenant address, or a unique loopback address. The network controller device receives packets originating from applications and/or an endpoints operating in a network segment associated with a VNID. The network controller device translates, using the translation table, unique loopback addresses and/or routable tenant addresses associated with the packets into routable tenant addresses and/or unique loopback addresses, respectively.

公开(公告)号：US10581744B2

公开(公告)日：2020-03-03

申请号：US15367317

申请日：2016-12-02

Applicant: Cisco Technology, Inc.

Inventor： Munish Mehta ,  Saurabh Jain ,  Praveen Jain ,  Ronak K. Desai ,  Yibin Yang

IPC: H04L12/815 ,  H04L12/24 ,  H04L12/761 ,  H04L12/931 ,  H04L12/715 ,  H04L12/717 ,  H04L12/753

Abstract: Presented herein are traffic pruning techniques that define the pruning at the group level. A software defined network (SDN) controller determines first and second endpoint groups (EPGs) of an SDN associated with the SDN controller. The SDN runs on a plurality of networking devices that interconnect a plurality of endpoints that are each attached to one or more host devices. The SDN controller determines a host-EPG mapping for the SDN, as well as a networking device-host mapping for the SDN. The SDN controller then uses the host-EPG mapping, the networking device-host mapping, and one or more group-based policies associated with traffic sent from the first EPG to the second EPG to compute hardware pruning policies defining how to prune multi-destination traffic sent from the first EPG to the second EPG. The hardware pruning policies are then installed in one or more of the networking devices or the host devices.

公开(公告)号：US20190141010A1

公开(公告)日：2019-05-09

申请号：US16236757

申请日：2018-12-31

Applicant: Cisco Technology, Inc.

Inventor： Vijay Chander ,  Yibin Yang ,  Praveen Jain ,  Munish Mehta

IPC: H04L29/12 ,  H04L12/751 ,  H04L12/46

Abstract: According to one or more embodiments of this disclosure, a network controller in a data center network establishes a translation table for in-band traffic in a data center network, the translation table resolves ambiguous network addresses based on one or more of a virtual network identifier (VNID), a routable tenant address, or a unique loopback address. The network controller device receives packets originating from applications and/or an endpoints operating in a network segment associated with a VNID. The network controller device translates, using the translation table, unique loopback addresses and/or routable tenant addresses associated with the packets into routable tenant addresses and/or unique loopback addresses, respectively.

公开(公告)号：US10212074B2

公开(公告)日：2019-02-19

申请号：US15663503

申请日：2017-07-28

Applicant: Cisco Technology, Inc.

Inventor： Chia Tsai ,  Norman W. Finn ,  Yibin Yang ,  Debashis Patnala Rao

IPC: H04L12/753 ,  H04L12/715 ,  H04L12/707 ,  H04L12/803

Abstract: In one embodiment, a multiple spanning tree (MST) region is defined in a network, where the MST region includes a plurality of network nodes interconnected by links. A MST cluster is defined within the MST region, where the MST cluster includes a plurality of network nodes selected from the plurality of network nodes of the MST region. A network node of the MST cluster generates one or more MST bridge protocol data units (BPDUs) that present the MST cluster as a single logical entity to network nodes of the MST region that are not included in the MST cluster, yet enables per-multiple spanning tree instance (per-MSTI) load balancing of traffic across inter-cluster links that connect network nodes included in the MST cluster and network nodes of the MST region that are not included in the MST cluster.

公开(公告)号：US10091062B2

公开(公告)日：2018-10-02

申请号：US15074906

申请日：2016-03-18

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Chiajen Tsai ,  Yibin Yang ,  Patnala Debashis Rao ,  Manish Chandra Agrawal ,  Rick Chang

IPC: H04J11/00 ,  H04L12/24 ,  H04L12/46 ,  G06F9/455 ,  H04H20/53

Abstract: An example method for facilitating multiple mobility domains with VLAN translation in a multi-tenant network environment is provided and includes detecting attachment of a first virtual machine on a first port and a second virtual machine on a second port of a network element, the first port and the second port being configured with a first mobility domain and a second mobility domain, respectively, and the first and second virtual machines being configured on a same original VLAN, determining whether the original VLAN falls within a pre-configured VLAN range, translating the original VLAN to a first VLAN on the first port corresponding to the first mobility domain and to a second VLAN on the second port corresponding to the second mobility domain, and segregating traffic on the original VLAN into the first VLAN and the second VLAN according to the respective mobility domains for per-port VLAN significance.