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公开(公告)号：US08751613B1
公开(公告)日：2014-06-10
申请号：US12942678
申请日：2010-11-09
申请人： Jan Medved , David Ward , James Guichard
发明人： Jan Medved , David Ward , James Guichard
IPC分类号： G06F15/177
CPC分类号： H04L45/021 , H04L29/12066 , H04L41/12 , H04L45/00 , H04L45/028 , H04L45/04 , H04L47/10 , H04L61/1511 , H04L67/1021 , H04L67/104
摘要： In general, techniques are described for enhancing the Application-Layer Traffic Optimization (ALTO) service to supplement network topological grouping with location-based groupings to account for endpoint mobility. For example, as described herein, an ALTO server maintains physical location information for a network of one or more endpoints that provides a service. A PID generator of the ALTO server aggregates the endpoints into a set of one or more PIDs based at least on the physical location information for the endpoints, wherein each PID is associated with a subset of the endpoints. The ALTO server generates network and cost maps for the ALTO service that include PID entries to identify a respective subset of the endpoints associated with each of the set of PIDs and cost entries that incorporate cost that reflect physical distances among endpoints.
摘要翻译： 通常，描述了用于增强应用层业务优化（ALTO）服务的技术，以基于位置分组来补充网络拓扑分组以解决端点移动性。 例如，如本文所述，ALTO服务器维护提供服务的一个或多个端点的网络的物理位置信息。 至少基于端点的物理位置信息，ALTO服务器的PID发生器将端点聚合成一组一个或多个PID，其中每个PID与端点的子集相关联。 ALTO服务器生成包含PID条目的ALTO服务的网络和成本图，以识别与该组PID中的每一个相关联的端点的相应子集以及包含反映端点之间的物理距离的成本的成本条目。
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公开(公告)号：US08711838B1
公开(公告)日：2014-04-29
申请号：US13243310
申请日：2011-09-23
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/28
CPC分类号： H04L12/4633 , H04L12/4645
摘要： In general, techniques are described for transmitting MPLS labels over a network. More specifically, a network device such a router receives a packet to be forwarded according to a label switching protocol, such as Multi-Protocol Label Switching (MPLS). The router may determine a service instance for the packet based on a client device from which the packet originated. The network device may determine one or more services to apply to the packet based on the service instance for the packet and generate a label which having a service instance portion and a service information portion. The network device may append the label to the packet to form an MPLS-encapsulated packet, and may forward the MPLS-encapsulated packet via an output interface according to the label switching protocol.
摘要翻译： 通常，描述了通过网络传输MPLS标签的技术。 更具体地，诸如路由器的网络设备根据诸如多协议标签交换（MPLS）的标签交换协议来接收要转发的分组。 路由器可以基于从其发起分组的客户端设备来确定分组的服务实例。 网络设备可以基于分组的服务实例来确定应用于分组的一个或多个服务，并且生成具有服务实例部分和服务信息部分的标签。 网络设备可以将标签附加到分组，形成MPLS封装的分组，并且可以根据标签交换协议经由输出接口转发MPLS封装的分组。
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公开(公告)号：US20130343174A1
公开(公告)日：2013-12-26
申请号：US13533961
申请日：2012-06-26
申请人： James Guichard , David Ward
发明人： James Guichard , David Ward
CPC分类号： H04L45/28 , H04L41/0659 , H04L41/5025 , H04L45/22
摘要： Techniques are described for detecting failure or degradation of a service enabling technology function independent from an operational state of a service node hosting the service enabling technology function. For example, a service node may provide one or more service enabling technology functions, and service engineered paths may be traffic-engineered through a network to service node network devices that host a service enabling technology function. A monitor component at the service layer of the service node can detect failure or degradation of one or more service enabling technology functions provided by the service node. The monitor component reports detection of failure or degradation to a fault detection network protocol in a forwarding plane of the service node. The fault detection network protocol communicates with an ingress router of a service engineered path to trigger fast reroute by the ingress of traffic flows to bypass the affected service enabling technology function.
摘要翻译： 描述了用于检测服务使能技术功能的独立于承载服务使能技术功能的服务节点的操作状态的故障或劣化的技术。 例如，服务节点可以提供一个或多个服务启用技术功能，并且服务设计路径可以通过网络进行业务量设计，以服务承载服务使能技术功能的节点网络设备。 服务节点的服务层的监视器组件可以检测由服务节点提供的一个或多个服务使能技术功能的故障或劣化。 监视器组件报告在服务节点的转发平面中检测到故障检测网络协议的故障或劣化。 故障检测网络协议与服务工程路由的入口路由器进行通信，通过流量流入引发快速重路由，绕过受影响的业务使能技术功能。
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公开(公告)号：US20060187916A1
公开(公告)日：2006-08-24
申请号：US11063803
申请日：2005-02-23
IPC分类号： H04L12/56
CPC分类号： H04L12/56
摘要： A data communication device (e.g., a router) originates a network configuration message in response to a network topology change or so as to refresh a configuration message. The data communication device encodes a timestamp in the network configuration message. The timestamp indicates a time of originating the network configuration message. Further, the data communication device transmits the network configuration message over the network to other network devices that, in turn, initiate further broadcast of at least a portion of contents of the network configuration message. Based on the timestamp of the network configuration message, the data communication devices receiving the network configuration message identify transmission time value indicating how long the network configuration message takes to be conveyed over the network to the other network devices. The data communication devices utilize the transmission time value as a timeout period for determining whether a data communication device failure occurs.
摘要翻译： 数据通信设备（例如，路由器）响应于网络拓扑变化而发起网络配置消息，以便刷新配置消息。 数据通信设备对网络配置消息中的时间戳进行编码。 时间戳表示发起网络配置消息的时间。 此外，数据通信设备通过网络将网络配置消息发送到其他网络设备，其进一步发起网络配置消息的至少一部分内容的进一步广播。 基于网络配置消息的时间戳，接收网络配置消息的数据通信设备识别表示网络配置消息在网络上传送到其他网络设备多长时间的传输时间值。 数据通信设备利用传输时间值作为用于确定数据通信设备故障是否发生的超时周期。
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公开(公告)号：US09088519B2
公开(公告)日：2015-07-21
申请号：US13525073
申请日：2012-06-15
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/723 , H04L12/46
CPC分类号： H04L45/50 , H04L12/4645 , H04L45/507
摘要： In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.
摘要翻译： 在一个示例中，网络设备根据标签交换协议接收要转发的分组，由服务网络设备确定要在分组上执行的服务，向服务网络设备发送标签请求消息，其中标签请求 消息指示对具有特定长度的标签的支持，其中特定长度大于二十位（例如，四十位），并且其中标签请求消息指定要对分组执行的服务，响应于标签请求而接收 消息，定义特定长度的标签的标签映射消息，将标签附加到分组以形成多协议标签交换（MPLS）封装的分组，并根据标签交换协议转发MPLS封装的分组。
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6.发明申请公开(公告)号：US20060262772A1
公开(公告)日：2006-11-23
申请号：US11135253
申请日：2005-05-23
IPC分类号： H04L12/28
CPC分类号： H04L45/308 , H04L43/0811 , H04L43/12 , H04L45/04 , H04L45/302 , H04L45/70 , H04L47/24 , H04L63/029
摘要： A path verification protocol (PVP) which enumerates a series of messages sent to a set of nodes, or routers, along a network path identifies connectivity and transmission characteristic attributes by defining, implementing, and analyzing path verification messages (PVMs) in a VPN environment. Typical VPN environments are characterized by service level agreements (SLAs) between service providers which specify particular service level and/or bandwidth level guarantees, typically in terms of megabits per second (MB/s) or other qualitative transfer criteria. Such guarantees are often expressed in contractual terms as Quality of Service (QoS) criteria. Configurations herein provide a mechanism for determination of paths and/or routes that satisfy a QoS or other delivery speed/bandwidth guarantee. Such a mechanism may therefore be employed to perform routing decisions for QoS based traffic. Further, such a mechanism is employable to verify QoS levels and related attributes related to contractual terms between service providers and customers.
摘要翻译： 路径验证协议（PVP），其列举沿着网络路径发送到一组节点或路由器的一系列消息，通过在VPN环境中定义，实现和分析路径验证消息（PVM）来识别连接性和传输特性属性 。 典型的VPN环境的特征在于服务提供商之间的服务级别协议（SLA），其指定特定服务级别和/或带宽级别保证，通常以兆比特每秒（MB / s）或其他定性传输标准。 这种保证通常以合同条款表示为服务质量（QoS）标准。 本文中的配置提供了用于确定满足QoS或其他传送速度/带宽保证的路径和/或路由的机制。 因此可以采用这种机制来执行基于QoS的业务的路由决策。 此外，这种机制可用于验证与服务提供商和客户之间的合同条款相关的QoS等级和相关属性。
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公开(公告)号：US09143557B2
公开(公告)日：2015-09-22
申请号：US13534121
申请日：2012-06-27
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
CPC分类号： H04L67/1008 , H04L67/1025 , H04L67/1029 , H04L67/16 , H04L67/327
摘要： In general, techniques are described for providing feedback loops for service engineered paths. A service node comprising an interface and a control unit may implement the techniques. The interface receives traffic via a path configured within a network to direct the traffic from an ingress network device of the path to the service node. The control unit applies one or more services to the traffic received via the path and generates service-specific information related to the application of the one or more services to the traffic. The interface then sends the service-specific information to at least one network device configured to forward the traffic via the path so that the at least one network device configured to forward the traffic via the path is able to adapt the path based on the service-specific information.
摘要翻译： 通常，描述了为服务工程路径提供反馈回路的技术。 包括接口和控制单元的服务节点可以实现这些技术。 该接口通过网络中配置的路径接收流量，将流量从路由入口网络设备引导到业务节点。 控制单元将一个或多个服务应用于经由路径接收到的业务，并且生成与该业务相关的一个或多个业务的应用相关的业务特定信息。 接口然后将服务特定信息发送到被配置为经由路径转发流量的至少一个网络设备，使得配置成经由路径转发流量的至少一个网络设备能够基于服务 - 具体信息。
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公开(公告)号：US08948001B2
公开(公告)日：2015-02-03
申请号：US13533961
申请日：2012-06-26
申请人： James Guichard , David Ward
发明人： James Guichard , David Ward
CPC分类号： H04L45/28 , H04L41/0659 , H04L41/5025 , H04L45/22
摘要： Techniques are described for detecting failure or degradation of a service enabling technology function independent from an operational state of a service node hosting the service enabling technology function. For example, a service node may provide one or more service enabling technology functions, and service engineered paths may be traffic-engineered through a network to service node network devices that host a service enabling technology function. A monitor component at the service layer of the service node can detect failure or degradation of one or more service enabling technology functions provided by the service node. The monitor component reports detection of failure or degradation to a fault detection network protocol in a forwarding plane of the service node. The fault detection network protocol communicates with an ingress router of a service engineered path to trigger fast reroute by the ingress of traffic flows to bypass the affected service enabling technology function.
摘要翻译： 描述了用于检测服务使能技术功能的独立于承载服务使能技术功能的服务节点的操作状态的故障或劣化的技术。 例如，服务节点可以提供一个或多个服务启用技术功能，并且服务设计路径可以通过网络进行业务量设计，以服务承载服务使能技术功能的节点网络设备。 服务节点的服务层的监视器组件可以检测由服务节点提供的一个或多个服务使能技术功能的故障或劣化。 监视器组件报告在服务节点的转发平面中检测到故障检测网络协议的故障或劣化。 故障检测网络协议与服务工程路由的入口路由器进行通信，通过流量流入引发快速重路由，绕过受影响的业务使能技术功能。
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公开(公告)号：US20140003232A1
公开(公告)日：2014-01-02
申请号：US13534121
申请日：2012-06-27
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
CPC分类号： H04L67/1008 , H04L67/1025 , H04L67/1029 , H04L67/16 , H04L67/327
摘要： In general, techniques are described for providing feedback loops for service engineered paths. A service node comprising an interface and a control unit may implement the techniques. The interface receives traffic via a path configured within a network to direct the traffic from an ingress network device of the path to the service node. The control unit applies one or more services to the traffic received via the path and generates service-specific information related to the application of the one or more services to the traffic. The interface then sends the service-specific information to at least one network device configured to forward the traffic via the path so that the at least one network device configured to forward the traffic via the path is able to adapt the path based on the service-specific information.
摘要翻译： 通常，描述了为服务工程路径提供反馈回路的技术。 包括接口和控制单元的服务节点可以实现这些技术。 该接口通过网络中配置的路径接收流量，将流量从路由入口网络设备引导到业务节点。 控制单元将一个或多个服务应用于经由路径接收到的业务，并且生成与该业务相关的一个或多个业务的应用相关的业务特定信息。 接口然后将服务特定信息发送到被配置为经由路径转发流量的至少一个网络设备，使得配置成经由路径转发流量的至少一个网络设备能够基于服务 - 具体信息。
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公开(公告)号：US20060215577A1
公开(公告)日：2006-09-28
申请号：US11086007
申请日：2005-03-22
IPC分类号： H04L12/28
CPC分类号： H04L43/50 , H04L41/12 , H04L41/5003 , H04L45/00 , H04L45/121 , H04L45/123 , H04L45/124 , H04L45/22 , H04L45/26 , H04L45/302 , H04L45/42 , H04L45/50
摘要： A system and method for aggregating performance characteristics for core network paths allows computation of message traffic performance over each of the available candidate paths through the core for identifying an optimal core network path. Particular network traffic, or messages, include attributes indicative of performance, such as transport time, delay, jitter, and drop percentage, over individual hops along the candidate path. A diagnostic processor parses these messages to identify the attributes corresponding to performance, and analyzes the resulting parsed routing information to compute an expected performance, such as available bandwidth (e.g. transport rate) over the path. Messages including such attributes may include link state attribute (LSA) messages, diagnostic probe messages specifically targeted to enumerate such attributes, or other network suitable network traffic. In a particular configuration, the messages may be Path Verification Protocol (PVP) messages.
摘要翻译： 用于聚合核心网络路径的性能特征的系统和方法允许通过核心的每个可用候选路径计算消息业务性能，用于识别最佳核心网路径。 特定网络流量或消息包括指示性能的属性，例如沿着候选路径的单个跳跃的传输时间，延迟，抖动和丢弃百分比。 诊断处理器解析这些消息以识别与性能相对应的属性，并分析所得到的解析路由信息以计算期望的性能，例如路径上的可用带宽（例如传输速率）。 包括这些属性的消息可以包括链路状态属性（LSA）消息，专门用于枚举这样的属性的诊断探测消息，或其他网络合适的网络业务。 在特定配置中，消息可以是路径验证协议（PVP）消息。
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