公开(公告)号：WO2005119949A1

公开(公告)日：2005-12-15

申请号：PCT/US2005/008205

申请日：2005-03-10

Applicant: CISCO TECHNOLOGY, INC. ,  VASSEUR, Jean, Philippe ,  WARD, David ,  SIVABALAN, Muthurajah ,  GOGUEN, Robert

Inventor： VASSEUR, Jean, Philippe ,  WARD, David ,  SIVABALAN, Muthurajah ,  GOGUEN, Robert

IPC: H04J1/16

CPC classification number: H04L45/12 ,  H04L45/04 ,  H04L45/125 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/70 ,  H04L47/125 ,  H04L47/762 ,  H04L47/822 ,  H04L47/825

Abstract: A mechanism to alleviate bandwidth fragmentation in a network employing path computation element(s) to place MPLS Traffic Engineering tunnels. One application is a multiple Autonomous System or multiple area network employing distributed computation of MPLS Traffic Engineering LSPs. A particular path computation element may determine that bandwidth fragmentation is present based on monitoring of path computation failures where desired paths are blocked due to bandwidth constraints. In response to the detected bandwidth fragmentation condition, the path computation element floods a routing notification within its Autonomous System or area. Nodes respond to the routing notification by requesting reoptimization of their own previously requested Traffic Engineering LSPs allowing the path computation element an opportunity to alleviate bandwidth fragmentation.

Abstract translation: 一种减轻使用路径计算元素的网络中带宽分段的放置MPLS流量工程隧道的机制。 一个应用是采用MPLS流量工程LSP的分布式计算的多自治系统或多区域网络。 特定路径计算元件可以基于由于带宽限制阻止期望路径的路径计算失败的监视来确定存在带宽分段。 响应于检测到的带宽分段条件，路径计算元件在其自治系统或区域内泛洪路由通知。 节点通过请求重新优化自己先前请求的流量工程LSP来响应路由通知，允许路径计算元素减轻带宽分段的机会。

公开(公告)号：WO2019045993A1

公开(公告)日：2019-03-07

申请号：PCT/US2018/046238

申请日：2018-08-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： SHEPHERD, Gregory, J. ,  WIJNANDS, Ijsbrand ,  RANNS, Neale ,  WARD, David ,  O'GORMAN, Michael, Francis

IPC: H04L29/08 ,  H04L12/18

Abstract: In one embodiment, a method includes receiving from a host node comprising a tenant multicast application with a single tenant deployment, an encapsulated multicast packet over unicast at a virtual replicator, the encapsulated multicast packet comprising receiver information for the virtual replicator, replicating the encapsulated multicast packet at the virtual replicator, and transmitting the encapsulated multicast packet over unicast to a plurality of receiving nodes based on the receiver information. The receiving nodes comprise the tenant multicast application and the virtual replicator operates in a cloud without multicast capability. An apparatus is also disclosed herein.

公开(公告)号：WO2017184530A2

公开(公告)日：2017-10-26

申请号：PCT/US2017/028005

申请日：2017-04-17

Applicant: CISCO TECHNOLOGY, INC.

Inventor： WARD, David ,  SURCOUF, Andre ,  TOWNSLEY, Mark

IPC: H04L29/06 ,  H04L29/08 ,  H04L12/725 ,  H04L29/12

Abstract: A method of retrieving content in an Internet Protocol version 6 (IPv6) network is described, including receiving from a network node a lookup request associated with content at a server comprising a mapping database. A response is generated including an IPv6 address, the IPv6 address comprising a content identifier and an indication of a location of the content. The response is transmitted to the network node. A method including receiving at a mapping database a lookup request associated with content and returning a text record comprising an ordered list of addresses for use in segment routing to the content is also described.

公开(公告)号：WO2014189670A1

公开(公告)日：2014-11-27

申请号：PCT/US2014/036907

申请日：2014-05-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： BOSCH, Hendrikus, G.P. ,  GUICHARD, James ,  BARACH, Dave ,  DUMINUCO, Alessandro ,  FANG, Luyuan ,  QUINN, Paul ,  FERNANDO, Rex ,  WARD, David

IPC: H04L12/715

CPC classification number: H04L67/10 ,  H04L45/02 ,  H04L45/04

Abstract: Presented herein are techniques for use in a network environment that includes one or more service zones, each service zone including at least one instance of an in-line application service to be applied to network traffic and one or more routers to direct network traffic to the at least one service, and a route target being assigned to a unique service zone to serve as a community value for route import and export between routers of other service zones, destination networks or source networks via a control protocol. An edge router in each service zone or destination network advertises routes by its destination network prefix tagged with its route target. A service chain is created by importing and exporting of destination network prefixes by way of route targets at edge routers of the service zones or source networks.

Abstract translation: 这里提出的是在包括一个或多个服务区域的网络环境中使用的技术，每个服务区域包括要应用于网络业务的在线应用服务的至少一个实例以及一个或多个路由器以将网络流量引导到 至少一个服务，以及被分配给唯一服务区的路由目标，以用作通过控制协议在其他服务区域，目的地网络或源网络的路由器之间路由导入和导出的社区值。 每个服务区域或目标网络中的边缘路由器通过其路由目标标记的目标网络前缀来通告路由。 通过在服务区域或源网络的边缘路由器上的路由目标导入和导出目标网络前缀来创建服务链。

公开(公告)号：WO2013188799A1

公开(公告)日：2013-12-19

申请号：PCT/US2013/045945

申请日：2013-06-14

Applicant: CISCO TECHNOLOGY, INC.

Inventor： PREVIDI, Stefano ,  VASSEUR, Jean-Philippe ,  WARD, David

IPC: H04L12/24 ,  H04L12/751

CPC classification number: H04L43/16 ,  H04L41/12 ,  H04L45/025 ,  H04L45/28 ,  H04L45/42 ,  H04L45/50

Abstract: In one embodiment, a stateful path computation element (PCE) in a computer network determines a need to route at least a threshold number of tunnels, and in response, triggers a routing update from a determined set of routers. Having updated the routing information and available network resources for the set of routers, the stateful PCE may then compute the tunnels based on the update.

Abstract translation: 在一个实施例中，计算机网络中的有状态路径计算元件（PCE）确定需要路由至少一个阈值数量的隧道，并且作为响应，从确定的一组路由器触发路由更新。 为了更新路由器集合的路由信息​​和可用的网络资源，状态PCE然后可以基于更新来计算隧道。

公开(公告)号：WO2011033500A1

公开(公告)日：2011-03-24

申请号：PCT/IL2010/000745

申请日：2010-09-12

Applicant: CISCO TECHNOLOGY, INC. ,  GERSTEL, Ornan ,  BONOMI, Flavio ,  WARD, David

Inventor： GERSTEL, Ornan ,  BONOMI, Flavio ,  WARD, David

IPC: H04J14/02 ,  H04L12/56

CPC classification number: H04B10/0793 ,  H04B10/07955 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0267 ,  H04J14/0284 ,  H04L45/22 ,  H04L45/245 ,  H04L45/70 ,  H04L47/10 ,  H04L47/125 ,  Y02D50/30

Abstract: A method for communicating optically between nodes of an optical network, including forming, between a first node and a second node of the network, a set of lightpaths, each of the set of lightpaths having a respective configuration, transferring communication traffic between the first and second nodes via the set of lightpaths, determining, for the set of lightpaths, that a communication traffic level associated therewith is less than a predetermined threshold, in response to the determining, removing at least one lightpath having a given configuration from the set of lightpaths to form a reduced set of lightpaths and transferring the communication traffic between the first and second nodes via the reduced set of lightpaths, while reducing the level of power consumption in the at least one lightpath and while maintaining the given configuration of the at least one lightpath.

Abstract translation: 一种用于在光网络的节点之间进行光学通信的方法，包括在所述网络的第一节点和所述第二节点之间形成一组光路，所述一组光路中的每一个具有相应的配置，在第一和第 经由所述一组光路径的第二节点，响应于确定，针对所述一组光路确定与其相关联的通信业务量小于预定阈值，以响应于所述确定，从所述一组光路中去除具有给定配置的至少一个光路 以形成减少的光路集合，并且经由减少的光路集合在第一和第二节点之间传送通信业务，同时降低至少一个光路中的功率消耗水平，同时保持至少一个光路径的给定配置 。