公开(公告)号：US11265216B2

公开(公告)日：2022-03-01

申请号：US17135421

申请日：2020-12-28

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/24 ,  G06F16/901 ,  G06F9/54 ,  G06F16/27 ,  H04L29/08 ,  H04L41/084 ,  H04L41/0816 ,  H04L67/10 ,  H04L41/08

Abstract: In general, techniques are described for communicating state information in distribute operating system. A network device comprises a first hardware node and a second hardware node. The first hardware node may execute a first instance of a distributed operating system, and maintain a first data structure that stores a plurality of objects defining a portion of state information. The second hardware node may execute a second instance of the distributed operating system, and maintain a second data structure that stores synchronized versions of the plurality of objects. The first hardware node may further receive updated state information, update the first data structure to include the updated state information, and synchronize the updated first data structure with the second data structure. The second hardware node may synchronize the second data structure with the updated first data structure.

公开(公告)号：US20210119872A1

公开(公告)日：2021-04-22

申请号：US17135421

申请日：2020-12-28

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/24 ,  G06F9/54 ,  G06F16/27 ,  G06F16/901

Abstract: In general, techniques are described for communicating state information in distribute operating system. A network device comprises a first hardware node and a second hardware node. The first hardware node may execute a first instance of a distributed operating system, and maintain a first data structure that stores a plurality of objects defining a portion of state information. The second hardware node may execute a second instance of the distributed operating system, and maintain a second data structure that stores synchronized versions of the plurality of objects. The first hardware node may further receive updated state information, update the first data structure to include the updated state information, and synchronize the updated first data structure with the second data structure. The second hardware node may synchronize the second data structure with the updated first data structure.

公开(公告)号：US20180176120A1

公开(公告)日：2018-06-21

申请号：US15637839

申请日：2017-06-29

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/721 ,  H04L12/725 ,  H04L12/753 ,  G06F9/48 ,  H04L12/24

CPC classification number: H04L45/14 ,  G06F9/4843 ,  G06F9/5061 ,  G06F11/1438 ,  G06F11/1658 ,  G06F2201/81 ,  H04L41/0654 ,  H04L41/082 ,  H04L41/0873 ,  H04L41/12 ,  H04L43/0811 ,  H04L45/021 ,  H04L45/302 ,  H04L45/48 ,  H04L45/583 ,  H04L2012/6467

Abstract: In general, techniques are described for maintaining coherency in distributed operating systems for network devices. A network device comprising hardware computing nodes may be configured to perform the techniques. The hardware computing nodes may execute a distributed operating system. At least one the hardware computing nodes may determine whether one or more of the plurality of hardware computing nodes has failed and is no longer supporting execution of the distributed operating system, and determine whether remaining ones of the plurality of hardware computing nodes exceeds a quorum threshold. The at least one of the hardware computing nodes may further restart, when the remaining ones of the plurality of hardware computing nodes is less than the quorum threshold, the distributed operating system.

公开(公告)号：US08923305B2

公开(公告)日：2014-12-30

申请号：US13735931

申请日：2013-01-07

Applicant: Juniper Networks, Inc.

Inventor： David Ward ,  David M. Katz

IPC: H04L12/28 ,  H04L12/751 ,  H04L12/759 ,  H04L12/801 ,  H04L12/755 ,  H04L12/721

CPC classification number: H04L45/02 ,  H04L45/021 ,  H04L45/028 ,  H04L45/32 ,  H04L47/39

Abstract: An enhanced, flooding-based link state routing protocol is described that provides pruning of link state data and, when needed, rate-controlled refresh of the pruned link state data from other routers of the flooding domain. A routing device comprises a network interface to send and receive packets over a layer-two (L2) communication medium. The routing device includes a control unit coupled to the network interface, and a flooding-based link state routing protocol executing on a processor of the control unit. The link-state routing protocol establishes an adjacency with a peer router. A database of the routing device includes entries that store a plurality of link state messages for a flooding domain of the link state routing protocol, wherein at least one of the entries in the database stores a partial link state message having a header portion and a payload having pruned link state data.

Abstract translation: 描述了一种增强的基于洪泛的链路状态路由协议，其提供链路状态数据的修剪，并且当需要时，对来自泛洪域的其他路由器的修剪的链路状态数据进行速率控制的刷新。 路由设备包括用于在二层（L2）通信介质上发送和接收分组的网络接口。 路由设备包括耦合到网络接口的控制单元和在控制单元的处理器上执行的基于洪泛的链路状态路由协议。 链路状态路由协议与对等体路由器建立邻接关系。 路由设备的数据库包括存储用于链路状态路由协议的泛洪域的多个链路状态消息的条目，其中数据库中的至少一个条目存储具有报头部分和有效载荷的部分链路状态消息 修剪了链接状态数据。

公开(公告)号：US10182105B2

公开(公告)日：2019-01-15

申请号：US14867325

申请日：2015-09-28

Applicant: Juniper Networks, Inc.

Inventor： Pramod Srinivasan ,  Ramesh Rajan ,  David M. Katz ,  Robert Stephen Rodgers

IPC: G06F15/16 ,  H04L29/08 ,  H04L12/24 ,  H04L29/06 ,  G06F9/48

Abstract: A first system manager operating on a first node of a distributed routing system, receives data indicating a current state of the distributed routing system. The first system manager may determine, based at least in part on the current state of the distributed routing system and a set of rules for an application, an updated state of the distributed routing system. Furthermore, the first node may send the updated state of the distributed routing system to a second node of the distributed routing system. Responsive to receiving the updated state of the distributed routing system, a second system manager on the second node may modify a state of the second node. Modifying the state of the second node may comprise at least one of: starting the application on the second node, stopping the application on the second node, or modifying a state of the application on the second node.

公开(公告)号：US20180176093A1

公开(公告)日：2018-06-21

申请号：US15637809

申请日：2017-06-29

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/24 ,  H04L12/751 ,  G06F9/48 ,  H04L12/753

CPC classification number: H04L41/12 ,  G06F9/4843 ,  G06F9/5061 ,  G06F11/2023 ,  G06F11/2097 ,  G06F2201/81 ,  H04L45/02 ,  H04L45/48

Abstract: In general, techniques are described for organizing execution of distributed operating systems for network devices. A device comprising hardware computing nodes may be configured to perform the techniques. The hardware computing nodes may execute a protocol by which to discover a topology of the plurality of hardware computing nodes, and determine, based on the topology, a subset of the plurality of hardware computing nodes to manage execution of a distributed operating system. The determined subset of the plurality of hardware computing nodes may execute a communication bus by which to synchronize operating system state information between the subset of the plurality of hardware computing nodes. The hardware computing nodes may further execute, based on the operating system state information, the distributed operating system to provide an execution environment in which one or more applications execute.

公开(公告)号：US20160191611A1

公开(公告)日：2016-06-30

申请号：US14587612

申请日：2014-12-31

Applicant: Juniper Networks, Inc.

Inventor： Pramod Srinivasan ,  Ramesh Rajan ,  David M. Katz ,  Robert Rodgers

IPC: H04L29/08 ,  H04L12/24

CPC classification number: H04L67/10 ,  G06F8/65 ,  G06F9/45558 ,  G06F2009/45562 ,  G06F2009/4557 ,  H04L41/0816 ,  H04L41/082 ,  H04L41/0893 ,  H04L43/0817

Abstract: A first system manager operating on a first node of a distributed computing system, receives data indicating a current state of the distributed computing system. The first system manager may determine, based at least in part on the current state of the distributed computing system and a set of rules for an application, an updated state of the distributed computing system. Furthermore, the first node may send the updated state of the distributed computing system to a second node of the distributed computing system. Responsive to receiving the updated state of the distributed computing system, a second system manager on the second node may modify a state of the second node. Modifying the state of the second node may comprise at least one of: starting the application on the second node, stopping the application on the second node, or modifying a state of the application on the second node.

Abstract translation: 在分布式计算系统的第一节点上操作的第一系统管理器接收指示分布式计算系统的当前状态的数据。 第一系统管理器可以至少部分地基于分布式计算系统的当前状态和用于应用的一组规则来确定分布式计算系统的更新状态。 此外，第一节点可以将分布式计算系统的更新状态发送到分布式计算系统的第二节点。 响应于接收分布式计算系统的更新状态，第二节点上的第二系统管理器可以修改第二节点的状态。 修改第二节点的状态可以包括以下中的至少一个：在第二节点上启动应用，停止第二节点上的应用，或修改第二节点上的应用的状态。

公开(公告)号：US08711855B1

公开(公告)日：2014-04-29

申请号：US13842796

申请日：2013-03-15

Applicant: Juniper Networks, Inc.

Inventor： James M. Murphy ,  Abhijit K. Choudhury ,  Pradeep Sindhu ,  Ina Minei ,  Jayabharat Boddu ,  David M. Katz ,  Kireeti Kompella

IPC: H04L12/28

CPC classification number: H04L47/12 ,  H04L12/28 ,  H04L41/0654 ,  H04L41/12 ,  H04L43/10 ,  H04L45/42 ,  H04L45/50

Abstract: An access network is described in which a centralized controller provides seamless end-to-end service from a core-facing edge of a service provider network through aggregation and access infrastructure out to access nodes located proximate to the subscriber devices. The controller operates to provide a central configuration point for configuring aggregation nodes (AGs) of a network of the service provider so as to provide transport services to transport traffic between access nodes (AXs) and edge routers on opposite borders of the network.

Abstract translation: 描述了一种接入网络，其中集中式控制器通过聚合和接入基础设施从位于接近用户设备的接入节点提供从服务提供商网络的面向核心边缘的无缝端到端服务。 控制器操作以提供用于配置服务提供商的网络的聚合节点（AG）的中央配置点，以便提供传输服务以在网络的相对边界上的接入节点（AX）和边缘路由器之间传输业务。