公开(公告)号：US08887147B2

公开(公告)日：2014-11-11

申请号：US13048018

申请日：2011-03-15

Applicant: Niraj Gopal ,  Jiong Sun ,  Sai V. Ramamoorthy ,  David D. Ward

Inventor： Niraj Gopal ,  Jiong Sun ,  Sai V. Ramamoorthy ,  David D. Ward

IPC: G06F9/44

CPC classification number: G06F8/68 ,  G06F8/658

Abstract: A method and apparatus for configuring an element management system server (an EMS server) to support new network element service application versions without upgrading the EMS server software is provided. The EMS stores base version data that describes the data model of a first version of a service application installed on a network element. When a second version of the service application is available, incremental version data describing changes to the data model from the first version to the second version is obtained and stored. In response to receiving a client request involving a service application on a particular network element, the EMS may apply incremental version data, associated with the version of the service application installed on the particular network element, to the base version data to form merged version data that describes the data model of the version of the service application installed on the particular network element.

Abstract translation: 提供了一种用于配置元素管理系统服务器（EMS服务器）以支持新的网元服务应用版本而不升级EMS服务器软件的方法和装置。 EMS存储基本版本数据，其描述安装在网络元件上的服务应用的第一版本的数据模型。 当服务应用程序的第二版本可用时，获取并存储描述从第一版本到第​​二版本的数据模型更改的增量版本数据。 响应于接收到涉及特定网络元件上的服务应用的客户端请求，EMS可以将与安装在特定网络元件上的服务应用的版本相关联的增量版本数据应用到基本版本数据，以形成合并版本数据 它描述了安装在特定网络元件上的服务应用程序版本的数据模型。

公开(公告)号：US08717899B2

公开(公告)日：2014-05-06

申请号：US10964184

申请日：2004-10-13

Applicant: Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Rodolphe Figaro ,  Reshad A. Rahman

Inventor： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Rodolphe Figaro ,  Reshad A. Rahman

IPC: H04L12/26 ,  H04L12/56

CPC classification number: H04L47/125 ,  H04L41/06 ,  H04L45/00 ,  H04L45/50 ,  H04L47/2408 ,  H04L47/745

Abstract: A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

Abstract translation: 用于以不涉及使用最大成本来指示实体的方式向诸如节点，线路卡和数据链路的实体（例如节点，线路卡和数据链路）广告外部资源（OOR）条件的系统和方法是“超出资源 。“根据该技术，实体的OOR条件在广告消息中包含的一个或多个类型长度值（TLV）对象中通告。 广告消息被洪泛到数据网络上的节点，以通知他们实体的OOR条件。 处理广告消息的头端节点可以使用包含在TLV对象中的信息来确定不包括与OOR条件相关联的实体的新标签交换路径（LSP）的路径。

公开(公告)号：US08374095B2

公开(公告)日：2013-02-12

申请号：US12383360

申请日：2009-03-23

Applicant: Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Bryant ,  Ian Michael Charles Shand

Inventor： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Bryant ,  Ian Michael Charles Shand

IPC: H04J1/16

CPC classification number: H04L12/2419 ,  H04L41/06 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L45/50 ,  H04L47/10

Abstract: In one embodiment, a connection verification (CV) message is initiated from an initiating maintenance end point (MEP) for an MPLS LSP, the CV message carried in a packet having a time-to-live (TTL) value of 1. Each maintenance intermediate point (MIP) along the MPLS LSP receives the packet and decrements the TTL, and in response to determining that the TTL equals 0, examines a payload of the packet to determine that the packet carries the CV message. The MIP may then append its MIP ID to a route record field of the payload having any previous MIP IDs of upstream MIPs, and forwards the CV message downstream along the MPLS LSP in a packet having a TTL value of 1. The end MEP receives the CV message, and sends a CV reply having the route record field with MIP IDs and an end MEP ID to the initiating MEP.

Abstract translation: 在一个实施例中，从针对MPLS LSP的发起维护端点（MEP）发起连接验证（CV）消息，在具有生存时间（TTL）值为1的分组中携带的CV消息。每个维护 沿着MPLS LSP的中间点（MIP）接收分组并递减TTL，并且响应于确定TTL等于0，检查分组的有效载荷以确定分组携带CV消息。 然后，MIP可以将其MIP ID附加到具有上游MIP的任何先前MIP ID的有效载荷的路由记录字段，并且在TTL值为1的分组中沿着MPLS LSP向下游转发CV消息。终端MEP接收 CV消息，并将具有MIP ID和终结MEP ID的路由记录字段的CV回复发送到初始MEP。

公开(公告)号：US08320255B2

公开(公告)日：2012-11-27

申请号：US11049587

申请日：2005-02-02

Applicant: Jean-Philippe Vasseur ,  Muthurajah Sivabalan ,  David D. Ward

Inventor： Jean-Philippe Vasseur ,  Muthurajah Sivabalan ,  David D. Ward

IPC: G01R31/08

CPC classification number: H04L45/04 ,  H04J3/14 ,  H04J3/16 ,  H04L45/02 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50

Abstract: A technique computes a traffic engineering (TE) label switched path (LSP) that spans multiple domains of a computer network from a head-end node of a local domain to a tail-end node of a remote domain. The novel inter-domain TE-LSP computation technique comprises a computation algorithm executed by the head-end node, which utilizes Path Computation Elements (PCEs) located within the remote domains (i.e., other than the local domain). Specifically, the head-end node requests path segments from a PCE in each of the remote domains, in which the path segments represent paths between all entry border routers to either all exit border routers of the particular remote domain (i.e., through the domain), or to the tail-end node. Upon receiving path segments from each remote domain, the head-end node combines the path segments with local domain information, and performs a forward path computation from the head-end node to the tail-end node to find the best (i.e., “shortest”) path.

Abstract translation: 一种技术计算跨越计算机网络的多个域的流量工程（TE）标签交换路径（LSP），从本地域的头端节点到远程域的尾端节点。 新颖的域间TE-LSP计算技术包括由前端节点执行的计算算法，其利用位于远程域内的路径计算元素（PCE）（即，除本地域之外）。 特别地，前端节点从每个远程域中的PCE请求路径段，其中路径段表示所有入口边界路由器之间到特定远程域的所有出口边界路由器（即，通过域）的路径， ，或到尾端节点。 在从每个远程域接收到路径段时，前端节点将路径段与本地域信息相结合，并且执行从前端节点到尾端节点的前向路径计算，以找到最佳（即最短） 路径。

公开(公告)号：US08111616B2

公开(公告)日：2012-02-07

申请号：US11518405

申请日：2006-09-08

Applicant: Mike Shand ,  Stewart F. Bryant ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  Stefano B. Previdi ,  David D. Ward

Inventor： Mike Shand ,  Stewart F. Bryant ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  Stefano B. Previdi ,  David D. Ward

IPC: G01R31/08 ,  G06F11/00

CPC classification number: H04L45/22 ,  H04L45/04 ,  H04L45/28

Abstract: An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.

Abstract translation: 描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。 该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

公开(公告)号：US07957306B2

公开(公告)日：2011-06-07

申请号：US11518383

申请日：2006-09-08

Applicant: Stewart F. Bryant ,  Mike Shand ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  David D. Ward ,  Clarence Filsfils ,  Stefano B. Previdi

Inventor： Stewart F. Bryant ,  Mike Shand ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  David D. Ward ,  Clarence Filsfils ,  Stefano B. Previdi

IPC: H04L12/26 ,  H04L12/66 ,  G06F15/16

CPC classification number: H04L45/22 ,  H04L45/02 ,  H04L45/04 ,  H04L45/28

Abstract: An apparatus for providing reachability in a routing domain of a data communications network having as components nodes and links therebetween for a routing domain external destination address is provided. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with the internal advertisement of the destination address reachability.

Abstract translation: 提供了一种用于在数据通信网络的路由域中提供可达性的装置，其具有用于路由域外部目的地地址的节点和链路之间的组件。 该设备被布置为在路由域中的节点内部向目的地址可达性通告，并将可达性类别与目的地址可达性的内部广告相关联。

公开(公告)号：US07926033B2

公开(公告)日：2011-04-12

申请号：US11139065

申请日：2005-05-27

Applicant: Niraj Gopal ,  Jiong Sun ,  Sai V. Ramamoorthy ,  David D. Ward

Inventor： Niraj Gopal ,  Jiong Sun ,  Sai V. Ramamoorthy ,  David D. Ward

IPC: G06F9/44 ,  G06F9/445 ,  G06F15/177 ,  G06F15/173

CPC classification number: G06F8/68 ,  G06F8/658

Abstract: A method and apparatus for configuring an element management system server (an EMS server) to support new network element service application versions without upgrading the EMS server software is provided. The EMS stores base version data that describes the data model of a first version of a service application installed on a network element. When a second version of the service application is available, incremental version data describing changes to the data model from the first version to the second version is obtained and stored. In response to receiving a client request involving a service application on a particular network element, the EMS may apply incremental version data, associated with the version of the service application installed on the particular network element, to the base version data to form merged version data that describes the data model of the version of the service application installed on the particular network element.

Abstract translation: 提供了一种用于配置元素管理系统服务器（EMS服务器）以支持新的网元服务应用版本而不升级EMS服务器软件的方法和装置。 EMS存储基本版本数据，其描述安装在网络元件上的服务应用的第一版本的数据模型。 当服务应用程序的第二版本可用时，获取并存储描述从第一版本到第​​二版本的数据模型更改的增量版本数据。 响应于接收到涉及特定网络元件上的服务应用的客户端请求，EMS可以将与安装在特定网络元件上的服务应用的版本相关联的增量版本数据应用到基本版本数据，以形成合并版本数据 它描述了安装在特定网络元件上的服务应用程序版本的数据模型。

公开(公告)号：US07660882B2

公开(公告)日：2010-02-09

申请号：US10866067

申请日：2004-06-10

Applicant: Jiong Sun ,  Niraj Gopal ,  Satyanarayana Raju ,  Sai V. Ramamoorthy ,  Prasad Yerneni ,  David D. Ward

Inventor： Jiong Sun ,  Niraj Gopal ,  Satyanarayana Raju ,  Sai V. Ramamoorthy ,  Prasad Yerneni ,  David D. Ward

IPC: G06F13/00

CPC classification number: H04L41/5054 ,  H04L41/0806 ,  H04L41/0843

Abstract: A method and apparatus for deploying EMS provisioning services is provided. A communication to administer a particular service on a network element is transmitted from an EMS client to an EMS server. The communication contains service data that describes a particular service to be administered on the network element. The EMS server constructs an instance of a generic record that stores the service data. The EMS server selects a service module to process the instance based on which service is associated with the service data stored in the instance. The instance is processed to produce result data that describes the result of processing the service data at the network element. The EMS server stores the result data in a persistent store. This generic framework enables communications between EMS clients and the EMS server involving different services to be processed similarly. New services are added without modification to the generic framework.

Abstract translation: 提供了一种部署EMS配置服务的方法和装置。 用于管理网元上的特定服务的通信从EMS客户端发送到EMS服务器。 该通信包含描述要在网络元件上管理的特定服务的服务数据。 EMS服务器构建存储服务数据的通用记录的实例。 EMS服务器根据哪个服务与实例中存储的服务数据相关联，选择服务模块来处理该实例。 处理该实例以产生描述在网络元件处理服务数据的结果的结果数据。 EMS服务器将结果数据存储在持久存储中。 该通用框架使EMS客户机和涉及不同服务的EMS服务器之间的通信能够被类似地处理。 添加新服务而不修改通用框架。

公开(公告)号：US07633874B1

公开(公告)日：2009-12-15

申请号：US10833811

申请日：2004-04-28

Applicant: Gargi Nalawade ,  Keyur P. Patel ,  John Galen Scudder ,  David D. Ward

Inventor： Gargi Nalawade ,  Keyur P. Patel ,  John Galen Scudder ,  David D. Ward

IPC: G06F11/00 ,  G01R31/08 ,  G08C15/00 ,  G06F15/173

CPC classification number: H04L45/00 ,  H04L45/04

Abstract: A soft notification technique isolates address family application based errors or events occurring within a routing protocol, such as the Border Gateway Protocol (BGP), used to exchange routing information between a router and its peer router over a BGP session operating on a reliable transport. The technique apportions the session into a plurality of logical subsets, each of which is associated with an address family application (AFI/SAFI) module of a BGP protocol executing on the routers. BGP soft notification messaging is employed to allow the router to notify its peer of an isolated error condition or event associated with an AFI/SAFI module. Isolation of the error/event enables restart (“soft reset”) of only the associated AFI/SAFI module, thereby obviating the need to reset or terminate the entire BGP session and reliable transport between the router and peer. Notably, soft reset of the module occurs without disrupting services provided by other AFI/SAFI modules of the BGP protocol.

Abstract translation: 软通知技术隔离在路由协议（如边界网关协议（BGP））中发生的地址族应用程序错误或事件，用于通过在可靠传输上运行的BGP会话在路由器与其对等路由器之间交换路由信息。 该技术将会话分配到多个逻辑子集中，每个逻辑子集与在路由器上执行的BGP协议的地址族应用（AFI / SAFI）模块相关联。 使用BGP软通知消息传递来允许路由器通知其对等体与AFI / SAFI模块相关联的隔离的错误状况或事件。 隔离错误/事件只能使相关的AFI / SAFI模块重新启动（“软复位”），从而避免重置或终止整个BGP会话以及路由器和对等体之间的可靠传输。 值得注意的是，模块的软复位不会中断BGP协议的其他AFI / SAFI模块提供的服务。

公开(公告)号：US07561527B1

公开(公告)日：2009-07-14

申请号：US10838151

申请日：2004-05-03

Applicant: David Katz ,  David D. Ward

Inventor： David Katz ,  David D. Ward

IPC: H04L1/00 ,  H04L12/26

CPC classification number: H04L45/28 ,  H04L43/50 ,  H04L45/22

Abstract: A protocol for detecting faults in a bidirectional path between two forwarding engines, where parts of the bidirectional path checked may include interfaces, one or more data links, and to the extent possible the forwarding engines themselves, with potentially very low latency. The protocol may operate independently of media, data protocols, and routing protocols.

Abstract translation: 用于检测两个转发引擎之间的双向路径中的故障的协议，其中检查的双向路径的部分可以包括接口，一个或多个数据链路，并且尽可能地具有潜在的非常低的等待时间。 该协议可以独立于媒体，数据协议和路由协议进行操作。