公开(公告)号：US20140215079A1

公开(公告)日：2014-07-31

申请号：US14231407

申请日：2014-03-31

Applicant: Juniper Networks, Inc.

Inventor： Reinaldo Penno ,  Satish Raghunath ,  Jan Medved ,  Mayuresh Bakshi

IPC: H04L12/911

CPC classification number: H04L47/70 ,  H04L67/1002 ,  H04L67/101 ,  H04L67/104 ,  H04L67/289

Abstract: Using the ALTO Service, networking applications can request through the ALTO protocol information about the underlying network topology from the ISP or Content Provider. The ALTO Service provides information such as preferences of network resources with the goal of modifying network resource consumption patterns while maintaining or improving application performance. This document describes, in one example, an ALTO server that intersects network and cost maps for a first network with network and cost maps for a second network to generate a master cost map that includes one or more master cost entries that each represent a cost to traverse a network from an endpoint in the first network to an endpoint in the second network. Using the master cost map, a redirector may select a preferred node in the first network with which to service a content request received from a host in the second network.

Abstract translation: 使用ALTO服务，网络应用程序可以通过ALTO协议向ISP或内容提供商请求关于底层网络拓扑的信息。 ALTO服务提供诸如网络资源的偏好的信息，目的是在维护或提高应用程序性能的同时修改网络资源消耗模式。 在一个示例中，该文档描述了与第一网络的网络和成本图相交的ALTO服务器，其具有用于第二网络的网络和成本图，以生成主成本图，其包括一个或多个主成本条目，每个代表成本表示成本 将网络从第一网络中的端点穿过到第二网络中的端点。 使用主成本图，重定向器可以选择第一网络中的优选节点，用于服务于从第二网络中的主机接收的内容请求。

公开(公告)号：US20140101254A1

公开(公告)日：2014-04-10

申请号：US14101214

申请日：2013-12-09

Applicant: Juniper Networks, Inc.

Inventor： Satish Raghunath ,  Jan Medved ,  Reinaldo Penno

IPC: H04L12/801

CPC classification number: H04L45/021 ,  H04L29/12066 ,  H04L41/12 ,  H04L45/00 ,  H04L45/028 ,  H04L45/04 ,  H04L47/10 ,  H04L61/1511 ,  H04L67/1021 ,  H04L67/104

Abstract: Using the ALTO Service, networking applications can request through the ALTO protocol information about the underlying network topology from the ISP or Content Provider. The ALTO Service provides information such as preferences of network resources with the goal of modifying network resource consumption patterns while maintaining or improving application performance. This document describes, in one example, an ALTO server that implements enhancements to the ALTO service to enable initiating incremental updates of network and cost maps to ALTO clients upon receiving status information from a content delivery network (CDN) node.

Abstract translation: 使用ALTO服务，网络应用程序可以通过ALTO协议向ISP或内容提供商请求关于底层网络拓扑的信息。 ALTO服务提供诸如网络资源的偏好的信息，目的是在维护或提高应用程序性能的同时修改网络资源消耗模式。 在一个示例中，本文档描述了实现对ALTO服务的增强的ALTO服务器，以便在从内容传送网络（CDN）节点接收到状态信息时，启动对ALTO客户端的网络和成本映射的增量更新。

公开(公告)号：US09413847B2

公开(公告)日：2016-08-09

申请号：US14252526

申请日：2014-04-14

Applicant: Juniper Networks, Inc.

Inventor： Jan Medved ,  Hannes Gredler ,  David Ward ,  Satish Raghunath

IPC: H04L29/06 ,  H04L29/08 ,  H04L12/751 ,  H04L12/715 ,  H04L12/717

CPC classification number: H04L45/42 ,  H04L45/02 ,  H04L45/04 ,  H04L45/64 ,  H04L67/32 ,  H04L69/321 ,  H04L69/329

Abstract: In general, techniques are described for using routing information obtained by operation of network routing protocols to dynamically generate network and cost maps for an application-layer traffic optimization (ALTO) service. For example, an ALTO server of an autonomous system (AS) receives routing information from routers of the AS by listening for routing protocol updates outputted by the routers and uses the received topology information to dynamically generate a network map of PIDs that reflects a current topology of the AS and/or of the broader network that includes the AS. Additionally, the ALTO server dynamically calculates inter-PID costs using received routing information that reflects current link metrics. The ALTO server then assembles the inter-PID costs into a cost map that the ALTO server may provide, along with the network map, to clients of the ALTO service.

Abstract translation: 一般来说，描述了使用通过网络路由协议的操作而获得的路由信息​​来动态地生成用于应用层流量优化（ALTO）服务的网络和成本映射的技术。 例如，自治系统（AS）的ALTO服务器通过监听由路由器输出的路由协议更新来接收来自AS的路由器的路由信息​​，并且使用所接收的拓扑信息来动态生成反映当前拓扑的PID的网络映射 的AS和/或包括AS的更广泛的网络。 此外，ALTO服务器使用反映当前链路指标的接收路由信息动态计算PID间成本。 然后，ALTO服务器将PID成本组合到ALTO服务器可以提供的成本图以及网络映射到ALTO服务的客户端。

公开(公告)号：US09253255B1

公开(公告)日：2016-02-02

申请号：US14562052

申请日：2014-12-05

Applicant: Juniper Networks, Inc.

Inventor： Hendrikus G. P. Bosch ,  Scott Ferguson ,  Jan Medved ,  David Ward ,  Hannes Gredler

IPC: G06F15/16 ,  H04L29/08

CPC classification number: H04L67/1093 ,  H04L65/4084 ,  H04L65/60 ,  H04L67/2814 ,  H04N21/63

Abstract: In general, techniques are described for managing content request referrals by keying content requests to a composite key data structure that maps end-user address prefixes and content identifiers to content delivery network servers of downstream CDNs. In one example, a CDN exchange includes a communication module to receive first network prefixes and first content identifiers from a first secondary content delivery network and to receive second network prefixes and second content identifiers from a second secondary content delivery network. A request router of the CDN exchange redirects the content request to the first secondary content delivery network or to the second secondary content delivery network according to a network address of the end user device and a content identifier for the content request.

Abstract translation: 通常，描述了通过将内容请求键入到将终端用户地址前缀和内容标识符映射到下游CDN的内容传送网络服务器的复合密钥数据结构来管理内容请求引用的技术。 在一个示例中，CDN交换机包括通信模块，用于从第一次要内容传送网络接收第一网络前缀和第一内容标识符，并从第二次要内容传送网络接收第二网络前缀和第二内容标识符。 CDN交换机的请求路由器根据最终用户设备的网络地址和内容请求的内容标识符将内容请求重定向到第一次要内容传送网络或第二次要内容传送网络。

公开(公告)号：US10084720B2

公开(公告)日：2018-09-25

申请号：US14231407

申请日：2014-03-31

Applicant: Juniper Networks, Inc.

Inventor： Reinaldo Penno ,  Satish Raghunath ,  Jan Medved ,  Mayuresh Bakshi

IPC: G06F15/173 ,  H04L12/911 ,  H04L29/08

CPC classification number: H04L47/70 ,  H04L67/1002 ,  H04L67/101 ,  H04L67/104 ,  H04L67/289

Abstract: Using the ALTO Service, networking applications can request through the ALTO protocol information about the underlying network topology from the ISP or Content Provider. The ALTO Service provides information such as preferences of network resources with the goal of modifying network resource consumption patterns while maintaining or improving application performance. This document describes, in one example, an ALTO server that intersects network and cost maps for a first network with network and cost maps for a second network to generate a master cost map that includes one or more master cost entries that each represent a cost to traverse a network from an endpoint in the first network to an endpoint in the second network. Using the master cost map, a redirector may select a preferred node in the first network with which to service a content request received from a host in the second network.

公开(公告)号：US09893951B1

公开(公告)日：2018-02-13

申请号：US15256861

申请日：2016-09-06

Applicant: Juniper Networks, Inc.

Inventor： Jan Medved ,  David Ward

IPC: H04L12/24 ,  H04L12/751 ,  H04L12/813

CPC classification number: H04L41/12 ,  H04L45/02 ,  H04L47/20

Abstract: In general, techniques are described for dynamically scheduling and establishing paths in a multi-layer, multi-topology network to provide dynamic network resource allocation and support packet flow steering along paths prescribed at any layer or combination of layers of the network. In one example, a multi-topology path computation element (PCE) accepts requests from client applications for dedicated paths. The PCE receives topology information from network devices and attempts to identify paths through a layer or combination of layers of the network that can be established at the requested time in view of the specifications requested for the dedicated paths and the anticipated bandwidth/capacity available in the network. The PCE schedules the identified paths through the one or more layers of the network to carry traffic for the requested paths. At the scheduled times, the PCE programs path forwarding information into network nodes to establish the scheduled paths.

公开(公告)号：US20150244628A1

公开(公告)日：2015-08-27

申请号：US14697415

申请日：2015-04-27

Applicant: Juniper Networks, Inc.

Inventor： Hannes Gredler ,  Jan Medved ,  David Ward

IPC: H04L12/803 ,  H04L12/715

CPC classification number: H04L47/125 ,  H04L45/04 ,  H04L45/121 ,  H04L45/124 ,  H04L45/302 ,  H04L45/44 ,  H04L45/50 ,  H04L47/724 ,  H04L47/785

Abstract: In general, techniques are described for distributing traffic engineering (TE) link information across network routing protocol domain boundaries using a routing protocol. In one example, a network device logically located within a first routing protocol domain includes a routing protocol module executing on a control unit to execute an exterior gateway routing protocol. The routing protocol module of the network device receives an exterior gateway routing protocol advertisement from a router logically located within a second routing protocol domain and decodes traffic engineering information for a traffic engineering link from the exterior gateway routing protocol advertisement. A path computation module of the network device computes a traffic engineered path by selecting the traffic engineering link for inclusion in the traffic engineered path based on the traffic engineering information.

Abstract translation: 一般来说，描述了使用路由协议跨网络路由协议域边界分配流量工程（TE）链路信息的技术。 在一个示例中，逻辑上位于第一路由协议域内的网络设备包括在控制单元上执行以执行外部网关路由协议的路由协议模块。 网络设备的路由协议模块从逻辑上位于第二路由协议域内的路由器接收外部网关路由协议通告，并从外部网关路由协议广告中解码流量工程链路的流量工程信息。 网络设备的路径计算模块通过根据流量工程信息选择流量工程链路来包含在流量工程路径中，计算流量工程路径。