公开(公告)号：US20150254149A1

公开(公告)日：2015-09-10

申请号：US14721135

申请日：2015-05-26

Applicant: Cisco Technology, Inc.

Inventor： Dhananjaya Rao ,  Victor M. Moreno ,  Hasmit Grover ,  Gaurav Badoni

IPC: G06F11/20 ,  H04L12/751 ,  H04L29/08

CPC classification number: G06F11/2033 ,  G06F2201/86 ,  H04L12/4641 ,  H04L45/02 ,  H04L47/746 ,  H04L67/141

Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.

Abstract translation: 编码在计算机可读介质上的设备，方法和指令，用于实现网络站点的边缘设备之间的双邻接。 第一边缘设备包括一个或多个本地接口，其被配置用于经由本地网络与共同位于第一网络站点中的一个或多个网络设备进行通信。 第一边缘设备还包括被配置为经由核心网络与位于连接到核心网络的一个或多个其他网络站点中的一个或多个网络设备进行通信的一个或多个覆盖接口。 第一边缘设备包括处理器，其被配置为经由本地接口中的至少一个建立与第一网络站点中共址的第二边缘设备的站点通信信道。 处理器还被配置为经由至少一个覆盖接口与第二边缘设备建立覆盖通信信道。

公开(公告)号：US20190036729A1

公开(公告)日：2019-01-31

申请号：US15662556

申请日：2017-07-28

Applicant: Cisco Technology, Inc.

Inventor： Priyanka Warade ,  Gaurav Badoni ,  Suresh Pasupula ,  Senthil Kenchiah

IPC: H04L12/28 ,  H04L12/54 ,  H04L12/46 ,  H04L12/705 ,  H04L12/721

CPC classification number: H04L12/2854 ,  H04L12/462 ,  H04L12/4641 ,  H04L12/5691 ,  H04L45/18 ,  H04L45/48 ,  H04L45/66

Abstract: Methods, devices, and computer-readable medium for preventing broadcast looping during a site merge are described herein. An example method can include detecting a site merge between a plurality of layer 2 (L2) networks using a spanning tree protocol (STP), blocking a data traffic port connecting the L2 networks in response to detecting the site merge, and performing an STP-Ethernet virtual private network (EVPN) handshake. The STP-EVPN handshake can include changing a root bridge in one of the L2 networks. Thereafter, the method can include unblocking the data traffic port connecting the L2 networks. In other words, the data traffic port connecting the L2 networks can be unblocked after changing the root bridge in the one of the L2 networks.

公开(公告)号：US09858163B2

公开(公告)日：2018-01-02

申请号：US14721135

申请日：2015-05-26

Applicant: Cisco Technology, Inc.

Inventor： Dhananjaya Rao ,  Victor M. Moreno ,  Hasmit Grover ,  Gaurav Badoni

IPC: G06F15/16 ,  G06F11/20 ,  H04L12/911 ,  H04L12/46 ,  H04L12/751 ,  H04L29/08

CPC classification number: G06F11/2033 ,  G06F2201/86 ,  H04L12/4641 ,  H04L45/02 ,  H04L47/746 ,  H04L67/141

Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.

公开(公告)号：US09762545B2

公开(公告)日：2017-09-12

申请号：US14531187

申请日：2014-11-03

Applicant: Cisco Technology, Inc.

Inventor： Gaurav Badoni ,  Dhananjaya Rao

IPC: G06F9/00 ,  H04L29/06 ,  H04L12/46

CPC classification number: H04L63/0272 ,  H04L12/4641 ,  H04L63/0281 ,  H04L63/162

Abstract: A first provider edge network device that is configured in a multi-homed virtual private network for a data center in which there are one or more peer edge network devices including a second edge network device, receives from the second edge network device a message indicating that a link for a particular Ethernet segment of the second edge network device in the data center is down. Information is stored at the first edge network device indicating state of links for Ethernet segments associated with each of the one or more other edge network devices at the data center. The first edge network device forwards of traffic for the particular Ethernet segment locally on Ethernet segments in the data center on behalf of the second edge network device. The proxy forwarding is performed for traffic for the particular Ethernet segment that originates from the data center, that is, for “same-site” traffic.

公开(公告)号：US20150043329A1

公开(公告)日：2015-02-12

申请号：US14182429

申请日：2014-02-18

Applicant: Cisco Technology, Inc.

Inventor： Vrushali Ashtaputre ,  Gaurav Badoni ,  Dhananjaya Rao ,  Sreenivas Duvvuri ,  Hasmit Grover

IPC: H04L12/24 ,  H04L12/18

CPC classification number: H04L41/0668 ,  H04L12/1886 ,  H04L12/4633 ,  H04L12/4675

Abstract: Techniques are provided for designating, in an overlay transport virtualization (OTV) network connected to a data center, an edge device to act as a backup authoritative edge device (BAED) for an authoritative edge device (AED) for multicast packet encapsulation and forwarding. Data traffic associated with a given virtual local area network (VLAN) may be detected from a multicast source in the data center addressed to recipients in a site group. A mapping may be generated between the site group and a core data group in the OTV network for traffic from the multicast source. Advertisements may be sent of the mapping to edge devices in another data center across the OTV network. A similar configuration is presented for a BAED for inbound multicast traffic to a data center.

Abstract translation: 提供了技术，用于在连接到数据中心的覆盖传输虚拟化（OTV）网络中指定用于授权边缘设备（AED）的用于组播分组封装和转发的备份权威边缘设备（BAED）的边缘设备。 与给定的虚拟局域网（VLAN）相关联的数据业务可以从寻址到站点组中的接收者的数据中心中的组播源检测。 可以在OTV网络中的站点组和核心数据组之间生成用于来自组播源的流量的映射。 广告可以通过OTV网络发送到另一个数据中心的边缘设备的映射。 针对数据中心的入站组播流量的BAED提供了类似的配置。

公开(公告)号：US10432420B2

公开(公告)日：2019-10-01

申请号：US15662556

申请日：2017-07-28

Applicant: Cisco Technology, Inc.

Inventor： Priyanka Warade ,  Gaurav Badoni ,  Suresh Pasupula ,  Senthil Kenchiah

IPC: H04L12/28 ,  H04L12/54 ,  H04L12/46 ,  H04L12/705 ,  H04L12/721

Abstract: Methods, devices, and computer-readable medium for preventing broadcast looping during a site merge are described herein. An example method can include detecting a site merge between a plurality of layer 2 (L2) networks using a spanning tree protocol (STP), blocking a data traffic port connecting the L2 networks in response to detecting the site merge, and performing an STP-Ethernet virtual private network (EVPN) handshake. The STP-EVPN handshake can include changing a root bridge in one of the L2 networks. Thereafter, the method can include unblocking the data traffic port connecting the L2 networks. In other words, the data traffic port connecting the L2 networks can be unblocked after changing the root bridge in the one of the L2 networks.

公开(公告)号：US10313155B2

公开(公告)日：2019-06-04

申请号：US13939667

申请日：2013-07-11

Applicant: Cisco Technology, Inc.

Inventor： Gaurav Badoni ,  Dhananjaya Rao ,  Hasmit Grover ,  Senthil Kenchiah ,  Vrushali Ashtaputre

IPC: H04L12/24 ,  H04L12/46 ,  H04L12/715 ,  H04L12/703 ,  H04L12/717

Abstract: In one embodiment, an authoritative edge device (AED)-server in a computer network maintains assignment of an active AED for a particular virtual local area network (VLAN), and in response to a triggered re-assignment, sends an AED change request identifying an old active AED for the particular VLAN and a new active AED for the particular VLAN (e.g., and/or corresponding backups). In response to receiving the change request, the old active AED ceases forwarding of traffic for the particular VLAN and transmits a relinquishment confirmation into the network. Also, in response to receiving the change request and the relinquishment confirmation from the old active AED, the new active AED assumes responsibility for traffic forwarding for the particular VLAN and transmits an activation confirmation into the network. The change request is then deemed completed by the AED-sever upon receipt of both the relinquishment confirmation and the activation confirmation.

公开(公告)号：US20150019697A1

公开(公告)日：2015-01-15

申请号：US13939667

申请日：2013-07-11

Applicant: Cisco Technology, Inc.

Inventor： Gaurav Badoni ,  Dhananjaya Rao ,  Hasmit Grover ,  Senthil Kenchiah ,  Vrushali Ashtaputre

IPC: H04L12/24

CPC classification number: H04L12/4641 ,  H04L41/0813 ,  H04L41/0856 ,  H04L45/04 ,  H04L45/28 ,  H04L45/42

Abstract: In one embodiment, an authoritative edge device (AED)-server in a computer network maintains assignment of an active AED for a particular virtual local area network (VLAN), and in response to a triggered re-assignment, sends an AED change request identifying an old active AED for the particular VLAN and a new active AED for the particular VLAN (e.g., and/or corresponding backups). In response to receiving the change request, the old active AED ceases forwarding of traffic for the particular VLAN and transmits a relinquishment confirmation into the network. Also, in response to receiving the change request and the relinquishment confirmation from the old active AED, the new active AED assumes responsibility for traffic forwarding for the particular VLAN and transmits an activation confirmation into the network. The change request is then deemed completed by the AED-sever upon receipt of both the relinquishment confirmation and the activation confirmation.

Abstract translation: 在一个实施例中，计算机网络中的授权边缘设备（AED） - 服务器维护对于特定虚拟局域网（VLAN）的活动AED的分配，并且响应于触发的重新分配，发送AED改变请求标识 用于特定VLAN的旧活动AED和特定VLAN的新活动AED（例如和/或相应的备份）。 响应于接收到更改请求，旧的活动AED停止转发特定VLAN的流量，并将放弃确认发送到网络。 此外，响应于从旧的活动AED接收到更改请求和放弃确认，新的活动AED承担特定VLAN的流量转发的责任，并将激活确认发送到网络中。 然后，AED-sever在收到放弃确认和激活确认之后，认为完成了更改请求。

公开(公告)号：US20140307541A1

公开(公告)日：2014-10-16

申请号：US13964327

申请日：2013-08-12

Applicant: Cisco Technology, Inc.

Inventor： Gaurav Badoni ,  Dhananjaya Rao ,  Hasmit Grover ,  Senthil Kenchiah ,  Victor Moreno

IPC: H04L12/703 ,  H04L12/721

CPC classification number: H04L45/28 ,  H04L45/12

Abstract: Techniques are presented herein for optimizing traffic routing in overlay networks. At a first edge device located at a first site in a network, a message is received that indicates address information of a network device. The address information of the network device is stored in an address table. The address information is associated with a site identifier that identifies a second site at which the network device is located. The site identifier is mapped to an identifier associated with a second edge device that is responsible for routing traffic to network devices at the second site.

Abstract translation: 本文介绍了优化覆盖网络中的流量路由的技术。 在位于网络中的第一站点的第一边缘设备处，接收到指示网络设备的地址信息的消息。 网络设备的地址信息存储在地址表中。 地址信息与标识网络设备所在的第二站点的站点标识符相关联。 站点标识符被映射到与负责将通信路由到第二站点处的网络设备的第二边缘设备相关联的标识符。

公开(公告)号：US11063784B2

公开(公告)日：2021-07-13

申请号：US16391703

申请日：2019-04-23

Applicant: Cisco Technology, Inc.

Inventor： Gaurav Badoni ,  Dhananjaya Rao ,  Hasmit Grover ,  Senthil Kenchiah ,  Vrushali Ashtaputre

IPC: H04L12/24 ,  H04L12/46 ,  H04L12/715 ,  H04L12/703 ,  H04L12/717

Abstract: In one embodiment, an authoritative edge device (AED)-server in a computer network maintains assignment of an active AED for a particular virtual local area network (VLAN), and in response to a triggered re-assignment, sends an AED change request identifying an old active AED for the particular VLAN and a new active AED for the particular VLAN (e.g., and/or corresponding backups). In response to receiving the change request, the old active AED ceases forwarding of traffic for the particular VLAN and transmits a relinquishment confirmation into the network. Also, in response to receiving the change request and the relinquishment confirmation from the old active AED, the new active AED assumes responsibility for traffic forwarding for the particular VLAN and transmits an activation confirmation into the network. The change request is then deemed completed by the AED-sever upon receipt of both the relinquishment confirmation and the activation confirmation.