公开(公告)号：US09537793B2

公开(公告)日：2017-01-03

申请号：US13648394

申请日：2012-10-10

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Nilesh Shah ,  Bhushan Kanekar

IPC: H04L12/56 ,  H04L12/933 ,  H04L12/775 ,  H04L12/947 ,  H04L12/747 ,  H04L12/741

CPC classification number: H04L49/10 ,  H04L45/58 ,  H04L45/742 ,  H04L45/745 ,  H04L49/25

Abstract: Techniques are provided for updating routing tables of switch devices. At a first switch device of a first rack unit in a network, information is received about addresses of host devices in the network. The addresses are stored in a software cache. A packet is received from a first host device assigned to a first subnet and housed in the first rack unit. The packet is destined for a second host device assigned to a second subnet and housed in a second rack unit in the network. The packet is forwarded using the subnet entry and it may remain sub-optimal during a period before which an entry can be installed form a software cache. The software cache is evaluated to determine the address of the second host device. The packet is then forwarded optimally. This will ensure any-to-any communications in the network initially sub-optimally and subsequently optimally.

Abstract translation: 提供了更新交换机设备路由表的技术。 在网络中的第一机架单元的第一交换设备处，接收关于网络中的主机设备的地址的信息。 地址存储在软件缓存中。 从分配给第一子网并被容纳在第一机架单元中的第一主机装置接收分组。 分组目的地是分配给第二子网并被容纳在网络中的第二机架单元中的第二主机设备。 使用子网条目转发数据包，并且可以在可以从软件高速缓存安装条目的时间段内保持次优。 评估软件高速缓存以确定第二主机设备的地址。 数据包然后被最佳地转发。 这将确保网络中的任何对任何通信最初都处于最佳和最佳状态。

公开(公告)号：US20160028656A1

公开(公告)日：2016-01-28

申请号：US14877026

申请日：2015-10-07

Applicant: Cisco Technology, Inc.

Inventor： Pei-Chun Cheng ,  Shyam Kapadia ,  Nilesh Shah ,  Vipin Jain

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

CPC classification number: H04L49/354 ,  G06F9/455 ,  H04L12/4641 ,  H04L41/0806 ,  H04L49/70

Abstract: Techniques are provided for provisioning network resources for virtual machines. At a first switch device, a configuration request message is received from a virtual switch to provision virtual network segmentation resources for a virtual machine managed by the virtual switch. The first switch device provisions the virtual network segmentation resources for the virtual machine. The first switch devices sends to a second switch device a first synchronization message that includes information describing the virtual network segmentation resources. The second switch device is a peer of the first switch device. The first switch device also sends to the second switch device a second synchronization message that includes state information indicating that the first switch device is in an active state for servicing the virtual machine and that the second switch device is to be placed in a dormant state for servicing the virtual machine.

公开(公告)号：US09065661B2

公开(公告)日：2015-06-23

申请号：US13787453

申请日：2013-03-06

Applicant: CISCO TECHNOLOGY, INC.

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

IPC: H04L12/00 ,  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：US20150103692A1

公开(公告)日：2015-04-16

申请号：US14053988

申请日：2013-10-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Vipin Jain ,  Dhananjaya Rao ,  Palathingal Frank ,  Shyam Kapadia ,  Nilesh Shah

IPC: H04L12/24

CPC classification number: H04L41/0806 ,  H04L41/0816

Abstract: Presented herein are techniques to handle data packets received at a top-of-rack (ToR) switch in an underlay network hosting one or more tenant networks. The underlay network may comprise a plurality of ToR switches each connected to each of a plurality of spine switches. The data packet may be received from a virtual machine in a tenant network, and have a header with a data packet identifier. A mobility domain identifier may be determined that corresponds to the network portion within which the virtual machine can be migrated. The mobility domain may be configured on the ToR switch on a per-port basis based on the virtual machine connected to the ToR switch port. A unique identifier may be formed based on the data packet identifier and mobility domain identifier. Using this unique identifier, provisioning information may be obtained for the tenant network on the ToR switch.

Abstract translation: 这里提出的是处理在托管一个或多个租户网络的底层网络中的机架顶部（ToR）交换机处接收的数据分组的技术。 底层网络可以包括多个ToR开关，每个ToR开关连接到多个脊柱开关中的每一个。 可以从租户网络中的虚拟机接收数据分组，并具有具有数据分组标识符的报头。 可以确定对应于可以迁移虚拟机的网络部分的移动性域标识符。 基于连接到ToR交换机端口的虚拟机，每个端口可以在ToR交换机上配置移动性域。 可以基于数据分组标识符和移动性域标识符形成唯一标识符。 使用该唯一标识符，可以为ToR交换机上的租户网络获取供应信息。

公开(公告)号：US20150043581A1

公开(公告)日：2015-02-12

申请号：US13959996

申请日：2013-08-06

Applicant: Cisco Technology, Inc.

Inventor： Dileep K. Devireddy ,  Shyam Kapadia ,  Nilesh Shah

IPC: H04L12/713 ,  H04L12/741

CPC classification number: H04L45/745 ,  H04L45/586 ,  H04L45/74 ,  H04L49/70 ,  H04L61/103 ,  H04L61/2596 ,  H04L61/6009 ,  H04L61/6022 ,  H04L67/10 ,  H04L69/22

Abstract: At a physical device in a network configured to host a virtual switch and one or more virtual machines, a packet is received at the virtual switch from a source virtual machine that is directly attached to that virtual switch. A destination Media Access Control (MAC) address is identified from the packet indicating a destination virtual machine for the packet. In response to determining that the destination MAC address of the packet is not present in a database of MAC addresses accessible by the virtual switch, the destination MAC address of the packet is replaced with a shared MAC address associated with a plurality of physical switches in the network.

Abstract translation: 在配置为托管虚拟交换机和一个或多个虚拟机的网络中的物理设备处，在虚拟交换机处从直接连接到该虚拟交换机的源虚拟机接收到分组。 从指示分组的目的地虚拟机的分组中识别目的地媒体访问控制（MAC）地址。 响应于确定分组的目的地MAC地址不存在于由虚拟交换机可访问的MAC地址的数据库中，分组的目的MAC地址被替换为与多个物理交换机相关联的共享MAC地址 网络。

公开(公告)号：US20140250220A1

公开(公告)日：2014-09-04

申请号：US13781911

申请日：2013-03-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Ming Zhang ,  Chengelpet V. Ramesh ,  Nilesh Shah

IPC: G06F9/50

CPC classification number: G06F9/5077 ,  G06F9/45558 ,  G06F2009/4557 ,  H04L12/4625 ,  H04L61/103 ,  H04L61/2015 ,  H04L61/2084

Abstract: Techniques are provided for sending address information of virtual machines to a physical switch. A migration of a virtual machine to a physical server is detected. The physical server obtains address information of the virtual machine, and upon obtaining the address information of the virtual machine, the physical server sends the address information to a first physical switch that is connected to the physical server.

Abstract translation: 提供了用于将虚拟机的地址信息发送到物理交换机的技术。 检测到虚拟机到物理服务器的迁移。 物理服务器获取虚拟机的地址信息，并且在获得虚拟机的地址信息后，物理服务器将地址信息发送到连接到物理服务器的第一物理交换机。

公开(公告)号：US12119959B2

公开(公告)日：2024-10-15

申请号：US17550715

申请日：2021-12-14

Applicant: Cisco Technology, Inc.

Inventor： Smita Nath ,  Siva Vaddepuri ,  Abhijit Vijay Warkhedi ,  Shyam Kapadia ,  Sundeep Kumar Singh

IPC: H04L12/46 ,  G06F15/173 ,  H04L41/04 ,  H04L41/046 ,  H04L45/00 ,  H04L45/741 ,  H04L61/103 ,  H04L61/5038 ,  H04L12/44 ,  H04L41/0806 ,  H04L41/34 ,  H04L67/567

CPC classification number: H04L12/4633 ,  G06F15/17312 ,  H04L12/4641 ,  H04L41/04 ,  H04L41/046 ,  H04L45/26 ,  H04L45/66 ,  H04L45/72 ,  H04L45/741 ,  H04L61/103 ,  H04L61/5038 ,  G06F15/17343 ,  H04L12/44 ,  H04L41/048 ,  H04L41/0806 ,  H04L41/34 ,  H04L67/567

Abstract: Techniques for combining the functionality of fabric interconnects and switches (e.g., Top-of-Rack (ToR) switches) into one network entity, thereby reducing the number of devices in a fabric and complexity of communications in the fabric. By collapsing FI and ToR switch functionality into one network entity, server traffic may be directly forwarded by the ToR switch and an entire tier is now eliminated from the topology hierarchy which may improve the control, data, and management plane. Further, this disclosure describes techniques for dynamically managing the number of gateway proxies running on one or more computer clusters based on a number of managed switch domains.

公开(公告)号：US11956123B1

公开(公告)日：2024-04-09

申请号：US17489351

申请日：2021-09-29

Applicant: Cisco Technology, Inc.

Inventor： Patnala Debashis Rao ,  Shyam Kapadia ,  Jason David Notari ,  Lukas Krattiger

IPC: H04W40/24 ,  H04L41/0873

CPC classification number: H04L41/0873

Abstract: Techniques for determining that a configuration change in configurations for a network device has occurred to result in changed configurations for the network device. The techniques include creating a policy for the network device by a network controller that manages one or more network devices. The network controller may obtain data from the network device, and update the network device policy based on the obtained data. In some examples, the network controller may compare the network device configurations state with the network controller intent to determine if an Out-of-Band (OOB) configuration change has occurred in the configuration of the network device. Finally, the controller may synchronize the network device to the controller based on the updated policy.

公开(公告)号：US11765033B2

公开(公告)日：2023-09-19

申请号：US17813118

申请日：2022-07-18

Applicant: Cisco Technology, Inc.

Inventor： Uffaz Nathaniel ,  Aakruthi Ramkumar Gopisetty ,  Jason David Notari ,  Shyam Kapadia ,  Lukas Krattiger

IPC: H04L41/08 ,  H04L12/46 ,  H04L41/0806 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/74

CPC classification number: H04L41/0883 ,  H04L12/4641 ,  H04L41/0806 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/74

Abstract: The present technology provides a framework for user-guided end-to-end automation of network deployment and management, that enables a user to guide the automation process for any kind of network deployment from the ground up, as well as offering network management, visibility, and compliance verification. The disclosed technology accomplishes this by creating a stateful and interactive virtual representation of a fabric using a customizable underlay fabric template instantiated with user-provided parameter values and network topology data computed from one or more connected network devices. A set of expected configurations corresponding to the user-specified underlay and overly fabric policies is then generated for deployment onto the connected network devices. Network deviations from the intended fabric policies are addressed by the provision of one or more configuration lines to be deployed onto or removed from the connected network devices to bring the network state in agreement with the set of expected configuration.

公开(公告)号：US11695640B2

公开(公告)日：2023-07-04

申请号：US17510075

申请日：2021-10-25

Applicant: Cisco Technology, Inc.

Inventor： Patnala Debashis Rao ,  Huilong Huang ,  Deepak Raykar ,  Shyam Kapadia ,  Stephanie Wong

IPC: H04L41/22 ,  H04L41/12 ,  H04L12/44

CPC classification number: H04L41/12 ,  H04L12/44 ,  H04L41/22

Abstract: The present disclosure provides systems, methods, and non-transitory computer-readable storage media for determining container to leaf switch connectivity information in a data center in a presence of blade switches and servers. In one aspect of the present disclosure, a method of determining container to leaf switch connectivity information of a data center utilizing at least one blade switch and at least one blade server, includes receiving, at a network controller, link connectivity information that includes south-bound neighboring information between the at least one blade switch of the data center and the at least one blade server of the data center; determining, at the network controller, the container to leaf switch connectivity information of the data center, based on the link connectivity information; and generating a visual representation of a topology of the data center based on the container to leaf switch connectivity information.