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1. 发明授权

US07640317B2 Configuration commit database approach and session locking approach in a two-stage network device configuration process 有权
标题翻译：配置提交数据库方法和会话锁定方法在两阶段网络设备配置过程中
公开(公告)号：US07640317B2
公开(公告)日：2009-12-29
申请号：US10866528
申请日：2004-06-10
申请人： Kapil Jain , Charles M. Letchworth , Neal McDonnell , Yassin Movassaghi , Sukumar Puvvala , David D. Ward
发明人： Kapil Jain , Charles M. Letchworth , Neal McDonnell , Yassin Movassaghi , Sukumar Puvvala , David D. Ward
IPC分类号： G06F15/167
CPC分类号： H04L41/0879 , H04L41/0266 , H04L41/028 , H04L41/0803 , H04L41/0866 , H04L67/125 , H04L67/142 , H04L67/34
摘要： A method and apparatus for modifying the configuration of a network device, such as a router, using a two-stage configuration model is provided. A first request from a user for a change in configuration of a network device is received. Configuration data associated with the first request is stored. A second request to modify the configuration of the network device to reflect the configuration data is received. An exclusive lock on the network device is assigned to the user preventing other users from modifying the configuration of the network device. The current operational state of the network device is modified to reflect the configuration data, which is then stored in a device configuration database. Users can view configuration history data to view prior configurations of the network device. Multiple users may modify the network device without interfering with one another because conflicts are avoided through use of an exclusive lock.
摘要翻译：提供了使用两级配置模型来修改诸如路由器的网络设备的配置的方法和装置。接收来自用户对网络设备的配置的改变的第一请求。存储与第一请求相关联的配置数据。接收到修改网络设备的配置以反映配置数据的第二个请求。网络设备上的排他锁被分配给用户，防止其他用户修改网络设备的配置。网络设备的当前操作状态被修改以反映配置数据，然后存储在设备配置数据库中。用户可以查看配置历史数据，查看网络设备的先前配置。多个用户可以修改网络设备而不会彼此干扰，因为通过使用排他锁来避免冲突。

2. 发明授权

US08090806B1 Two-stage network device configuration process 有权
标题翻译：两级网络设备配置过程
公开(公告)号：US08090806B1
公开(公告)日：2012-01-03
申请号：US10866647
申请日：2004-06-10
申请人： Mark A. Freskos , Michelle D. Hawke , Dhanendra Jain , Kapil Jain , Charles M. Letchworth , Neal McDonnell , Yassin Movassaghi , Sukumar Puvvala , Xiaobing Xie , David D. Ward
发明人： Mark A. Freskos , Michelle D. Hawke , Dhanendra Jain , Kapil Jain , Charles M. Letchworth , Neal McDonnell , Yassin Movassaghi , Sukumar Puvvala , Xiaobing Xie , David D. Ward
IPC分类号： G06F15/177 , G06F15/173 , G06F9/44
CPC分类号： H04L41/0879 , H04L41/0266 , H04L41/028 , H04L41/0803 , H04L41/0866 , H04L67/125 , H04L67/142 , H04L67/34
摘要： A method and apparatus for modifying the configuration of a network device, such as a router, using a two-stage configuration model is provided. A first request for a change in configuration of a network device is received. Configuration data that describes the change in configuration of the network device is stored in a buffer. A second request to modify the current operational state of the network device to reflect the configuration data stored in the buffer is received. An exclusive lock on the network device is obtained. The current operational state of the network device is modified to reflect the configuration data stored in the buffer. Multiple users may modify the network device without interfering with one another because conflicts are avoided through use of an exclusive lock. Requests of different management operations may be contained within XML documents that are transmitted from the client to the network device.
摘要翻译：提供了使用两级配置模型来修改诸如路由器的网络设备的配置的方法和装置。接收到对网络设备的配置的改变的第一请求。描述网络设备配置变化的配置数据存储在缓冲区中。接收修改网络设备的当前操作状态以反映存储在缓冲器中的配置数据的第二请求。获得网络设备上的排他锁。网络设备的当前操作状态被修改以反映存储在缓冲器中的配置数据。多个用户可以修改网络设备而不会彼此干扰，因为通过使用排他锁来避免冲突。不同管理操作的请求可以包含在从客户端发送到网络设备的XML文档中。

3. 发明授权

US07529825B1 Server-side XML-based development environment for network device management applications 有权
标题翻译：用于网络设备管理应用程序的服务器端基于XML的开发环境
公开(公告)号：US07529825B1
公开(公告)日：2009-05-05
申请号：US10727135
申请日：2003-12-02
申请人： Mark Allen Freskos , Michelle Diane Hawke , David D. Ward , John Mark Cooper , George Suwala , Yassin Movassaghi , Patrick Joseph Smears
发明人： Mark Allen Freskos , Michelle Diane Hawke , David D. Ward , John Mark Cooper , George Suwala , Yassin Movassaghi , Patrick Joseph Smears
IPC分类号： G06F15/173
CPC分类号： H04L41/0226 , Y10S707/99953 , Y10S707/99954
摘要： An end-to-end approach is provided for developing and maintaining network device management applications. The approach includes an XML-based development environment for network device management applications that uses Management Data API (MDA) schemas that define a hierarchical data model for components supported by a network device. The XML-based development environment also uses XML schemas to define a common XML-based interface used by management applications to access management data maintained on the network device. The approach provides programmatic access to network device management data and management data schema with an XML-based data model and interface that is consistent across all network device components. The approach includes mechanisms for automatically generating XML requests that conform to a hierarchical data model from requests that conform to a table-based data model. The approach also includes mechanisms for automatically extracting data from XML replies and conforming to the table-based data model.
摘要翻译：提供端到端方法来开发和维护网络设备管理应用程序。该方法包括使用管理数据API（MDA）模式的网络设备管理应用程序的基于XML的开发环境，该模式为网络设备支持的组件定义分层数据模型。基于XML的开发环境还使用XML模式来定义管理应用程序使用的通用的基于XML的接口来访问网络设备上维护的管理数据。该方法通过基于XML的数据模型和接口提供对网络设备管理数据和管理数据模式的编程访问，该数据模型和接口在所有网络设备组件中都是一致的。该方法包括从符合基于表的数据模型的请求自动生成符合分层数据模型的XML请求的机制。该方法还包括从XML回复中自动提取数据并符合基于表的数据模型的机制。

4. 发明授权

US08543718B2 Technique for efficiently and dynamically maintaining bidirectional forwarding detection on a bundle of links 有权
标题翻译：用于在一组链路上有效和动态地维护双向转发检测的技术
公开(公告)号：US08543718B2
公开(公告)日：2013-09-24
申请号：US11366732
申请日：2006-03-02
申请人： Reshad A. Rahman , David P. Toscano , Sylvain Masse , David D. Ward , Neil R. Ketley
发明人： Reshad A. Rahman , David P. Toscano , Sylvain Masse , David D. Ward , Neil R. Ketley
IPC分类号： G06F15/16 , G06F15/173
CPC分类号： H04L43/10 , H04L41/0663 , H04L45/00 , H04L45/22 , H04L45/24 , H04L45/245 , H04L45/28 , H04L45/58 , H04L45/60 , H04Q2011/0081 , H04Q2213/13162 , Y02D50/30
摘要： A technique efficiently and dynamically maintains bidirectional forwarding detection (BFD) on a bundle of links in a computer network. According to the novel technique, one or more “standby” BFD sessions may be established on one or more corresponding line cards (LCs), the LCs having one or more links of the bundle (bundle links). Once established, one of the standby BFD sessions may be selected as an “active” BFD session based on activity of one of the bundle links of the corresponding LC. Also, BFD messages may be transmitted from one of the bundle links of the active BFD session, e.g., the link receiving BFD messages. In response to inactivity of the transmitting link (e.g., failure, removal, etc.), the active BFD session may switch to another available active bundle link, and if no other active bundle links are available to the active BFD session, one of the standby BFD sessions is selected as the new active BFD session. In the event no other standby BFD sessions exist, the link bundle is determined to have failed.
摘要翻译：一种技术在计算机网络中的一组链路上有效且动态地维护双向转发检测（BFD）。根据该新技术，可以在一个或多个对应的线路卡（LC）上建立一个或多个“待机”BFD会话，该LC具有一束或多个链路的链路（束链路）。一旦建立，其中一个备用BFD会话可以基于对应LC的一个束链路的活动被选为“活动”BFD会话。此外，可以从活动BFD会话的捆绑链路之一（例如，接收BFD消息的链路）发送BFD消息。响应发送链路的不活动（例如，故障，删除等），活动BFD会话可能切换到另一个可用的主动捆绑链路，如果活动BFD会话没有其他活动捆绑链路可用，则其中一个选择备用BFD会话作为新的活动BFD会话。在没有其他备用BFD会话存在的情况下，链路束被确定为失败。

5. 发明授权

US08223760B2 Logical routers 有权
标题翻译：逻辑路由器
公开(公告)号：US08223760B2
公开(公告)日：2012-07-17
申请号：US12192745
申请日：2008-08-15
申请人： David D. Ward , George Suwala , Natarajan Shankar , John G. Scudder , Andrew Lunstad
发明人： David D. Ward , George Suwala , Natarajan Shankar , John G. Scudder , Andrew Lunstad
IPC分类号： H04L12/50
CPC分类号： H04L45/00 , H04L41/0213 , H04L41/0233 , H04L45/586 , H04L49/70
摘要： Systems and methods include providing a router that may be deployed as multiple logical routers that share a common fast interconnect. These logical routers may functionally serve as core routers, peering routers, aggregation routers, etc. A further aspect of the system and methods is that the resources assigned to a logical router are allocated from a pool potentially including multitude of hardware cards. A further aspect of the system and methods is that a logical router may be independently managed by the owner of the router or by an owner of the logical router.
摘要翻译：系统和方法包括提供可以部署为共享公共快速互连的多个逻辑路由器的路由器。这些逻辑路由器可以在功能上用作核心路由器，对等路由器，聚合路由器等。系统和方法的另一方面是分配给逻辑路由器的资源从可能包括大量硬件卡的池中分配。系统和方法的另一方面是逻辑路由器可以由路由器的所有者或逻辑路由器的所有者独立地管理。

6. 发明授权

US08131873B2 Technique for selecting a path computation element 有权
标题翻译：选择路径计算元素的技术
公开(公告)号：US08131873B2
公开(公告)日：2012-03-06
申请号：US10983280
申请日：2004-11-05
申请人： Jean-Philippe Vasseur , David D. Ward , Muthurajah Sivabalan , Stefano B. Previdi
发明人： Jean-Philippe Vasseur , David D. Ward , Muthurajah Sivabalan , Stefano B. Previdi
IPC分类号： G06F15/173
CPC分类号： H04L45/42 , H04L45/04 , H04L45/12 , H04L45/127 , H04L45/44 , H04L45/58
摘要： A technique efficiently selects a Path Computation Element (PCE) to compute a path between nodes of a computer network. The PCE selection technique is illustratively based on dynamic advertisements of the PCE's available path computation resources, using (i) a low-pass filter algorithm to compute such resources, and (ii) threshold determinations to control distribution of those advertisements. To that end, the novel technique enables one or more PCEs to dynamically send (advertise) their available path computation resources to a Path Computation Client (PCC) by way of the controlled advertisements. In addition, the technique enables the PCC to efficiently select a PCE (or set of PCEs) to service a path computation request based upon those available resources.
摘要翻译：一种技术有效地选择路径计算元素（PCE）来计算计算机网络的节点之间的路径。 PCE选择技术说明性地基于PCE可用路径计算资源的动态广告，使用（i）低通滤波器算法来计算这样的资源，以及（ii）阈值确定以控制这些广告的分布。为此，新技术使得一个或多个PCE能够通过受控广告动态地向路径计算客户端（PCC）发送（通告）它们的可用路径计算资源。此外，该技术使得PCC能够基于这些可用资源有效地选择PCE（或一组PCE）来服务路径计算请求。

7. 发明授权

US08068411B2 Method and apparatus to compute local repair paths taking into account link resources and attributes 有权
标题翻译：考虑链路资源和属性来计算局部修复路径的方法和装置
公开(公告)号：US08068411B2
公开(公告)日：2011-11-29
申请号：US11025179
申请日：2004-12-29
申请人： Jean-Philippe Vasseur , Stefano B. Previdi , David D. Ward
发明人： Jean-Philippe Vasseur , Stefano B. Previdi , David D. Ward
IPC分类号： H04J1/16 , H04L1/00
CPC分类号： H04L45/28 , H04J3/14 , H04L45/02
摘要： A technique for calculating local repair paths through a computer network using one or more dynamically measured parameters in place of, or in addition to, statically assigned cost metrics. The dynamically measured parameters include various statistical measures of resources and attributes associated with data links and/or network nodes in the computer network. In operation, an intermediate node monitors a set of local link and/or node parameters. The node may generate an advertisement in response to at least one of its monitored parameters crossing a predetermined threshold value or changing value by a predetermined percentage or amount. The advertisement is “flooded” so as to advertise the dynamically measured parameter value to other neighboring intermediate nodes. After receiving the advertisement, each node may recalculate one or more local repair paths based on the advertised parameter value. The node may utilize a recalculated repair path if it provides an appreciably lower-cost path, e.g., by a predetermined percentage, as compared with the currently deployed repair path.
摘要翻译：一种用于通过使用一个或多个动态测量参数来代替静态分配的成本度量来计算通过计算机网络的局部修复路径的技术。动态测量的参数包括与计算机网络中的数据链路和/或网络节点相关联的资源和属性的各种统计测量。在运行中，中间节点监视一组本地链路和/或节点参数。该节点可以响应于其所监视的参数中的至少一个与预定阈值相交或者以预定百分比或数量改变值来生成广告。广告被“淹没”，以便将动态测量的参数值通告给其他相邻的中间节点。在接收到广告之后，每个节点可以基于所通告的参数值重新计算一个或多个本地修复路径。如果节点可以使用重新计算的修复路径，如果其与当前部署的修复路径相比提供了明显较低成本的路径，例如，以预定百分比。

8. 发明申请

US20110280121A1 SYSTEM AND METHOD FOR SUMMARIZING ALARM INDICATIONS IN A NETWORK ENVIRONMENT 有权
标题翻译：在网络环境中总结报警指示的系统和方法
公开(公告)号：US20110280121A1
公开(公告)日：2011-11-17
申请号：US12778871
申请日：2010-05-12
申请人： Sami Boutros , Nagi Reddy Jonnala , Muthurajah Sivabalan , George Swallow , David D. Ward
发明人： Sami Boutros , Nagi Reddy Jonnala , Muthurajah Sivabalan , George Swallow , David D. Ward
IPC分类号： H04L12/24 , H04L12/26
CPC分类号： H04L41/0677
摘要： An example method includes detecting a failure at a first network element, the failure is associated with a link between the first network element and a second network element. The method also includes generating a list of network elements to be notified based on the failure, the second network element is included on the list. The method further includes generating an alarm indication signal (AIS) message, the AIS message identifies a plurality of tunnels affected by the failure. The AIS message is communicated to the second network element. In more detailed embodiments, each link between the first network element and the second network element includes a globally unique link identifier, which includes an associated autonomous system number. The globally unique link identifier can represent a string to be associated with the plurality of tunnels, the globally unique link identifier includes a source address and a destination address.
摘要翻译：示例性方法包括检测第一网络元件的故障，故障与第一网络元件和第二网络元件之间的链路相关联。该方法还包括基于故障生成要通知的网元的列表，第二网元包括在列表中。该方法还包括生成报警指示信号（AIS）消息，AIS消息识别受故障影响的多个隧道。 AIS消息被传送到第二网元。在更详细的实施例中，第一网络元件和第二网络元件之间的每个链路包括全球唯一链接标识符，其包括相关联的自主系统号码。全球唯一的链路标识符可以表示要与多个隧道相关联的字符串，全球唯一的链路标识符包括源地址和目的地址。

9. 发明授权

US07957279B2 Session border control using multiple processors 有权
标题翻译：会话边界控制使用多个处理器
公开(公告)号：US07957279B2
公开(公告)日：2011-06-07
申请号：US11755516
申请日：2007-05-30
申请人： Nir Ben-Dvora , Jisu Bhattacharya , Chandrasekar Krishnamurthy , Doron Oz , David D. Ward
发明人： Nir Ben-Dvora , Jisu Bhattacharya , Chandrasekar Krishnamurthy , Doron Oz , David D. Ward
IPC分类号： H04L12/28 , H04L12/62
CPC分类号： H04L65/1069 , H04L49/355 , H04L49/552
摘要： In one embodiment, a router receives a call request for establishing a multimedia exchange between two remote endpoints. The router selects a processing entity to manage a subset of connections with the remote endpoints according to an endpoint identification such as a remote address included in the call request. A different processing entity manages the remaining connections with the remote endpoints. Accordingly, the load of managing signaling for establishing the multimedia exchange is balanced between a plurality of processing elements that appear externally as a single entity such that modification of remote endpoint behavior is not required.
摘要翻译：在一个实施例中，路由器接收用于在两个远程端点之间建立多媒体交换的呼叫请求。路由器根据诸如呼叫请求中包括的远程地址的端点标识来选择处理实体来管理与远程端点的连接子集。不同的处理实体管理与远程端点的剩余连接。因此，用于建立多媒体交换的管理信令的负载在作为单个实体外部出现的多个处理元件之间进行平衡，使得不需要修改远程端点行为。

10. 发明授权

US07948873B2 Method for recovery of a controlled failover of a border gateway protocol speaker 有权
标题翻译：恢复边界网关协议扬声器受控故障转移的方法
公开(公告)号：US07948873B2
公开(公告)日：2011-05-24
申请号：US11253119
申请日：2005-10-17
申请人： David D. Ward , John Scudder
发明人： David D. Ward , John Scudder
IPC分类号： G01R31/08 , H04J1/16 , H04L1/00 , G06F11/00
CPC分类号： H04L45/28 , H04L45/04 , H04L45/58 , H04L45/60 , H04L69/16 , H04L69/163 , H04L69/40
摘要： A method and apparatus for recovering from a controlled failover of a BGP speaker is provided. A user sends, to a network element, a request to switch a designation of an active Border Gateway Protocol (BGP) speaker of the network element from a first BGP speaker to a second BGP speaker. After receiving the request, the network element pauses operation of a transport for BGP. Routing data, which describes a state of a first routing information base (RIB) maintained by the active BGP speaker, is transferred from the first BGP speaker to the second BGP speaker. Thereafter, the first BGP speaker may instruct the second BGP speaker to become the active BGP speaker. After the second BGP speaker becomes the active BGP speaker, the second BGP speaker resumes operation of the BGP transport.
摘要翻译：提供了一种用于从BGP扬声器的受控故障转移中恢复的方法和装置。用户向网络单元发送将网元的主动边界网关协议（BGP）扬声器的指定从第一BGP扬声器切换到第二BGP扬声器的请求。接收到请求后，网元暂停运行BGP。描述由主动BGP扬声器维护的第一路由信息库（RIB）的状态的路由数据从第一BGP发言者传送到第二BGP发言者。此后，第一个BGP扬声器可以指示第二个BGP扬声器成为主动的BGP扬声器。第二个BGP扬声器成为主动BGP扬声器后，第二个BGP扬声器恢复BGP传输的运行。

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