公开(公告)号：US09553736B2

公开(公告)日：2017-01-24

申请号：US14021569

申请日：2013-09-09

Applicant: Cisco Technology, Inc.

Inventor： Christopher M. North ,  Simon P. Chatterjee ,  Dezhong Cai

IPC: H04L12/28 ,  H04L12/44 ,  H04L12/751 ,  H04L12/715 ,  H04L12/703 ,  H04L12/753 ,  H04L12/803 ,  H04L12/46

CPC classification number: H04L12/44 ,  H04L12/462 ,  H04L45/02 ,  H04L45/04 ,  H04L45/28 ,  H04L45/48 ,  H04L47/125

Abstract: According to one embodiment, a first message identifying a best root node of a spanning tree may be generated. The spanning tree may be implemented by an access domain. The message may be generated independently of a spanning tree protocol instance. The first aggregation node may transmit the first message to a plurality of access nodes of the access domain. Data traffic from the plurality of access nodes may be received. Each access node of the plurality of access nodes may implement a spanning tree protocol instance that selects the best root node as a root node of the spanning tree. The data traffic may be aggregated with other data traffic of a plurality of access domains, and the aggregated data traffic transmitted to an aggregation network.

Abstract translation: 根据一个实施例，可以生成标识生成树的最佳根节点的第一消息。 生成树可以由访问域来实现。 消息可以独立于生成树协议实例生成。 第一聚合节点可以将第一消息发送到接入域的多个接入节点。 可以接收来自多个接入节点的数据业务。 多个接入节点的每个接入节点可以实现选择最佳根节点作为生成树的根节点的生成树协议实例。 数据流量可以与多个接入域的其他数据业务聚合，并且聚合的数据业务被发送到聚合网络。

公开(公告)号：US10320658B2

公开(公告)日：2019-06-11

申请号：US15296867

申请日：2016-10-18

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Dezhong Cai

IPC: H04L12/703 ,  H04L12/24 ,  H04L12/741 ,  H04L12/761 ,  H04L12/707

Abstract: In one embodiment, a method is described. The method includes receiving a network communication at a network device of a redundancy group. The redundancy group comprises a plurality of network devices, and the plurality of network devices are addressed in a first network using an anycast address. The method further includes, if the network communication is received from the first network, forwarding the network communication into a second network. If the network communication is received from the second network, the method determines whether to forward the network communication into the first network based on a status of the network device in the redundancy group, and a result of a filtering operation.

公开(公告)号：US10341227B2

公开(公告)日：2019-07-02

申请号：US15366376

申请日：2016-12-01

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Dezhong Cai

IPC: H04L12/751 ,  H04L12/703 ,  H04L12/24 ,  H04L12/741 ,  H04L12/761 ,  H04L12/707

Abstract: In one embodiment, a method is described. The method includes receiving a network communication at a first network device coupled to a first network and a second network, determining whether to forward the network communication into the first network over a logical connection, and, if the network communication is to be forwarded into the first network over the logical connection, forwarding the network communication into the first network over the logical connection. The network communication comprises a first network address in the second network that is associated with a second network device coupled to the second network. The logical connection is associated with a second network address in the second network. The determining is based, at least in part, on a determination, as to whether the first network device and the second network device are coupled to the logical connection, that uses the first network address and the second network address.

公开(公告)号：US20180109444A1

公开(公告)日：2018-04-19

申请号：US15296867

申请日：2016-10-18

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Dezhong Cai

IPC: H04L12/703 ,  H04L12/761 ,  H04L12/721 ,  H04L12/751 ,  H04L12/24 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/16 ,  H04L45/22 ,  H04L45/74

Abstract: In one embodiment, a method is described. The method includes receiving a network communication at a network device of a redundancy group. The redundancy group comprises a plurality of network devices, and the plurality of network devices are addressed in a first network using an anycast address. The method further includes, if the network communication is received from the first network, forwarding the network communication into a second network. If the network communication is received from the second network, the method determines whether to forward the network communication into the first network based on a status of the network device in the redundancy group, and a result of a filtering operation.

公开(公告)号：US20180109436A1

公开(公告)日：2018-04-19

申请号：US15366376

申请日：2016-12-01

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Dezhong Cai

IPC: H04L12/751 ,  H04L12/741

CPC classification number: H04L45/28 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/16 ,  H04L45/22 ,  H04L45/74

Abstract: In one embodiment, a method is described. The method includes receiving a network communication at a first network device coupled to a first network and a second network, determining whether to forward the network communication into the first network over a logical connection, and, if the network communication is to be forwarded into the first network over the logical connection, forwarding the network communication into the first network over the logical connection. The network communication comprises a first network address in the second network that is associated with a second network device coupled to the second network. The logical connection is associated with a second network address in the second network. The determining is based, at least in part, on a determination, as to whether the first network device and the second network device are coupled to the logical connection, that uses the first network address and the second network address.

公开(公告)号：US20140269254A1

公开(公告)日：2014-09-18

申请号：US13834111

申请日：2013-03-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Gopakumar Choorakkot Edakkunni ,  Dezhong Cai ,  Saikat Ray

IPC: H04L12/24

CPC classification number: H04L41/082 ,  G06F8/65 ,  G06F9/461 ,  G06F11/1438 ,  G06F11/2028 ,  G06F11/2033 ,  H04L41/0654 ,  H04L45/02 ,  H04L45/021 ,  H04L45/22 ,  H04L45/28 ,  H04L45/563 ,  H04L45/58 ,  H04L45/586 ,  H04L67/34 ,  H04L69/40

Abstract: Embodiments herein generally provide techniques for upgrading a virtual router (VR) comprising first and second physical routers used to route data between network devices. Before upgrade the first physical router, one or more ports of the router are disabled which causes data paths previously flowing through the first router to flow through the second router. After performing the upgrade, the first router is rebooted and uses a unique router ID to discover the network topology of an external network coupled to the VR. Once the network topology is identified, the first router activates a routing application (e.g., a BGP routing application) which enables the router to process control plane traffic received from the second router. Once routing information is gathered, the first router is able to assume the responsibility of forwarding data packets in the network, thereby freeing the second router to be upgraded.

Abstract translation: 本文的实施方案通常提供用于升级包括用于在网络设备之间路由数据的第一和第二物理路由器的虚拟路由器（VR）的技术。 在升级第一个物理路由器之前，路由器的一个或多个端口被禁用，这导致先前流经第一路由器的数据路径流过第二路由器。 执行升级后，第一个路由器重新启动，并使用唯一的路由器ID来发现耦合到VR的外部网络的网络拓扑。 一旦网络拓扑被识别，第一路由器激活路由应用（例如，BGP路由应用），其使路由器能够处理从第二路由器接收到的控制平面业务。 一旦收到路由信息，第一台路由器就可以承担转发网络中数据包的责任，从而释放第二台路由器进行升级。

公开(公告)号：US20190319878A1

公开(公告)日：2019-10-17

申请号：US16454191

申请日：2019-06-27

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Ali Sajassi ,  Dezhong Cai

IPC: H04L12/703 ,  H04L12/24 ,  H04L12/741

Abstract: In one embodiment, a method is described. The method includes receiving a network communication at a first network device coupled to a first network and a second network, determining whether to forward the network communication into the first network over a logical connection, and, if the network communication is to be forwarded into the first network over the logical connection, forwarding the network communication into the first network over the logical connection. The network communication comprises a first network address in the second network that is associated with a second network device coupled to the second network. The logical connection is associated with a second network address in the second network. The determining is based, at least in part, on a determination, as to whether the first network device and the second network device are coupled to the logical connection, that uses the first network address and the second network address.

公开(公告)号：US09338055B2

公开(公告)日：2016-05-10

申请号：US13834111

申请日：2013-03-15

Applicant: Cisco Technology, Inc.

Inventor： Gopakumar Choorakkot Edakkunni ,  Dezhong Cai ,  Saikat Ray

IPC: H04L12/24 ,  H04L12/713 ,  G06F9/445 ,  G06F11/14 ,  H04L12/775 ,  G06F9/46 ,  H04L12/755 ,  H04L12/703 ,  G06F11/20 ,  H04L29/08 ,  H04L12/751 ,  H04L29/14

CPC classification number: H04L41/082 ,  G06F8/65 ,  G06F9/461 ,  G06F11/1438 ,  G06F11/2028 ,  G06F11/2033 ,  H04L41/0654 ,  H04L45/02 ,  H04L45/021 ,  H04L45/22 ,  H04L45/28 ,  H04L45/563 ,  H04L45/58 ,  H04L45/586 ,  H04L67/34 ,  H04L69/40

Abstract: Embodiments herein generally provide techniques for upgrading a virtual router (VR) comprising first and second physical routers used to route data between network devices. Before upgrade the first physical router, one or more ports of the router are disabled which causes data paths previously flowing through the first router to flow through the second router. After performing the upgrade, the first router is rebooted and uses a unique router ID to discover the network topology of an external network coupled to the VR. Once the network topology is identified, the first router activates a routing application (e.g., a BGP routing application) which enables the router to process control plane traffic received from the second router. Once routing information is gathered, the first router is able to assume the responsibility of forwarding data packets in the network, thereby freeing the second router to be upgraded.

Abstract translation: 本文的实施方案通常提供用于升级包括用于在网络设备之间路由数据的第一和第二物理路由器的虚拟路由器（VR）的技术。 在升级第一个物理路由器之前，路由器的一个或多个端口被禁用，这导致先前流经第一路由器的数据路径流过第二路由器。 执行升级后，第一个路由器重新启动，并使用唯一的路由器ID来发现耦合到VR的外部网络的网络拓扑。 一旦网络拓扑被识别，第一路由器激活路由应用（例如，BGP路由应用），其使路由器能够处理从第二路由器接收到的控制平面业务。 一旦收到路由信息，第一台路由器就可以承担转发网络中数据包的责任，从而释放第二台路由器进行升级。