公开(公告)号：WO2006083872A2

公开(公告)日：2006-08-10

申请号：PCT/US2006/003407

申请日：2006-01-31

Applicant: CISCO TECHNOLOGY, INC. ,  PREVIDI, Stefano ,  GUICHARD, James N. ,  VASSEUR, Jean-Philippe ,  WARD, David D.

Inventor： PREVIDI, Stefano ,  GUICHARD, James N. ,  VASSEUR, Jean-Philippe ,  WARD, David D.

IPC: H04L12/56 ,  H04L12/28

CPC classification number: H04L45/026 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L63/0272

Abstract: Customer edge (CE) to CE device verification checks initiate routes from available CEs as a set of path verification messages, destined for remote CE routes serving a remote VPN. An extended community attribute, included among the attributes of the path verification message, stores the identity of the originating CE router. The path verification message propagates across the network, and transports the identity of the originating CE router because the originator identity is not overwritten by successive routing. Upon receipt by the remote CE, the originator is determinable from the extended community attribute. A further reachability field is also included in the extended community attribute and indicates whether per CE or per prefix is appropriate for the particular route in question. In this manner, CE-CE connectivity checks identify CEs which are reachable from other CEs. Accordingly, such a mechanism allows for route reachability aggregation on a per-CE or per prefix reachability basis.

Abstract translation: 客户端（CE）到CE设备验证检查从可用的CE启动路由作为一组路径验证消息，目的地是服务于远程VPN的远程CE路由。 包含在路径验证消息的属性之间的扩展团体属性存储始发CE路由器的身份。 路径验证消息通过网络传播，并传输始发CE路由器的身份，因为始发方身份不会被连续路由覆盖。 远程CE收到后，发起者可以从扩展团体属性中确定。 扩展社区属性中还包括另外的可访问性字段，并指示每个CE或每个前缀是否适合所讨论的特定路由。 以这种方式，CE-CE连接检查可以识别可从其他CE接入的CE。 因此，这种机制允许在每个CE或每个前缀可达性的基础上进行路由可达性聚合。

公开(公告)号：WO2006127799A3

公开(公告)日：2006-11-30

申请号：PCT/US2006/020066

申请日：2006-05-23

Applicant: CISCO TECHNOLOGY, INC. ,  GUICHARD, James N. ,  VASSEUR, Jean-Philippe ,  NADEAU, Thomas D. ,  WARD, David D. ,  PREVIDI, Stefano

Inventor： GUICHARD, James N. ,  VASSEUR, Jean-Philippe ,  NADEAU, Thomas D. ,  WARD, David D. ,  PREVIDI, Stefano

IPC: G06F11/00

Abstract: 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. 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.

公开(公告)号：WO2006118704A2

公开(公告)日：2006-11-09

申请号：PCT/US2006/011101

申请日：2006-03-27

Applicant: CISCO TECHNOLOGY, INC. ,  PATEL, Kevur ,  KAPOOR, Ruchi ,  GUICHARD, James N.

Inventor： PATEL, Kevur ,  KAPOOR, Ruchi ,  GUICHARD, James N.

IPC: H04L12/28 ,  H04L12/56

CPC classification number: H04L45/04 ,  H04L45/02

Abstract: A method, apparatus and computer program product for scaling hierarchical route reflectors (RRs) using automated Outbound Route Filtering (ORF) is presented. A first route reflector identifies other route reflectors configured as Route reflector clients within a route reflector hierarchy. The first route reflector then builds a common set of route target filters received from the client route reflectors and sends the common set of route target filters to client route reflectors.

Abstract translation: 提出了一种使用自动出站路由过滤（ORF）来缩放分层路由反射器（RR）的方法，设备和计算机程序产品。 第一个路由反射器标识在路由反射器层次结构中被配置为路由反射器客户端的其他路由反射器。 然后，第一个路由反射器构建从客户端路由反射器接收的一组通用路由目标过滤器，并将通用的路由目标过滤器集合发送到客户端路由反射器。

公开(公告)号：WO2016094907A1

公开(公告)日：2016-06-16

申请号：PCT/US2015/065610

申请日：2015-12-14

Applicant: CISCO TECHNOLOGY, INC.

Inventor： GUICHARD, James N. ,  QUINN, Paul ,  WARD, David D. ,  PIGNATARO, Carlos M.

IPC: H04L29/08 ,  H04L29/06 ,  H04L12/721 ,  H04L12/851

CPC classification number: H04L47/125 ,  H04L45/306 ,  H04L45/38 ,  H04L45/74 ,  H04L47/2408 ,  H04L47/2441 ,  H04L67/02 ,  H04L67/1023 ,  H04L67/327 ,  H04L69/22 ,  H04W72/0486

Abstract: A method for load balancing based on metadata in a network service header. The method includes receiving a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including metadata and service path information for the traffic flow identifying the service path, and the metadata comprises classification information of the packet or frame, extracting, by a service header processor of the load balancer, the classification information of the metadata from the packet or frame, and applying, by a load balancing function of the load balancer, a load balancing policy on the packet or frame based on the classification information of the metadata.

Abstract translation: 一种基于网络服务头部元数据的负载均衡方法。 所述方法包括接收业务流的分组或帧，其中所述分组或帧具有有效载荷，并且所述网络服务报头包括标识所述服务路径的业务流的元数据和服务路径信​​息，并且所述元数据包括所述分组的分类信息 或帧，由负载平衡器的服务头处理器从分组或帧中提取元数据的分类信息，并通过负载平衡器的负载平衡功能应用基于分组或帧的负载均衡策略 关于元数据的分类信息。

公开(公告)号：WO2006096560A3

公开(公告)日：2006-09-14

申请号：PCT/US2006/007722

申请日：2006-03-03

Applicant: CISCO TECHNOLOGY, INC. ,  NADEAU, Thomas D. ,  SAYEED, Mohammed Azhar ,  PIECUCH, Michael T. ,  GUICHARD, James N. ,  VASSEUR, Jean-Philippe

Inventor： NADEAU, Thomas D. ,  SAYEED, Mohammed Azhar ,  PIECUCH, Michael T. ,  GUICHARD, James N. ,  VASSEUR, Jean-Philippe

IPC: H04L12/28

Abstract: A mechanism for ASBRs to identify the originating node, or router, in an LSP conversant autonomous system (AS), such as an MPLS VPN environment, maintains the identity of the originating node and successive nodes in subsequent autonomous systems along the path to the node to be pinged. The identity of the transporting nodes is stored in a stack or other object associated with the ping request (ping), such that the pinged node may employ the stored identity as a set of return path routing information. Successive ASBRs store their identity on the stack, in an ordered manner, along the path to the destination. Upon reaching the destination (ping) node, the destination node employs the identity of the first node on the stack to send the acknowledgment, or ping response.

公开(公告)号：WO2005034441A1

公开(公告)日：2005-04-14

申请号：PCT/US2004/031842

申请日：2004-09-29

Applicant: CISCO TECHNOLOGY, INC.

Inventor： GUICHARD, James N. ,  HANZL, Robert

IPC: H04L12/46

CPC classification number: H04L45/00 ,  H04L12/4641 ,  H04L45/302 ,  H04L63/0892 ,  H04L67/327 ,  H04L69/14 ,  H04L69/329

Abstract: In a network supporting virtual private network (VPN) connections, a first network node (132) maintains separate routing policy information (130) to forward network traffic depending on a direction of the network traffic. Upstream routing policy information (130-1) at the first node identifies a second node (134) to forward upstream traffic received from at least a first client (110-1) communicating through the first node. Downstream routing policy information (130-2) at the first node identifies how to forward downstream network traffic received from another node to the first client. By preventing use of the downstream policy routing information by the first client to route upstream network traffic, the first node is able to forward traffic along a path that the network traffic otherwise would have not traveled. For example, network traffic communicated through the first node can be forced to travel through another network node through which it would have not otherwise have passed if the downstream policy information was available to route the network traffic.

Abstract translation: 在支持虚拟专用网（VPN）连接的网络中，第一网络节点（132）维持单独的路由策略信息（130），以根据网络流量的方向转发网络流量。 在第一节点处的上行路由策略信息（130-1）标识用于转发从至少第一客户端（110-1）接收的上游业务的第二节点（134），所述第一客户端通过第一节点通信。 在第一节点处的下行路由策略信息（130-2）识别如何将从另一个节点接收的下行网络流量转发到第一客户端。 通过防止第一客户端使用下行策略路由信息来路由上游网络流量，第一节点能够沿着网络流量否则不会行进的路径转发流量。 例如，如果下行策略信息可用于路由网络流量，则可以强制通过第一节点通信的网络流量通过另一个网络节点传播，否则该网络将不会通过。

公开(公告)号：WO2015138767A1

公开(公告)日：2015-09-17

申请号：PCT/US2015/020242

申请日：2015-03-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： KUMAR, Surendra M. ,  BAGEPALLI, Nagaraj A. ,  PATRA, Abhijit ,  QUINN, Paul ,  GUICHARD, James N. ,  BOSCH, Hendrikus G. P.

IPC: H04L12/725 ,  H04L12/24 ,  H04L12/801

CPC classification number: H04L45/02 ,  H04L41/08 ,  H04L41/0813 ,  H04L41/0893 ,  H04L41/0896 ,  H04L41/12 ,  H04L45/308 ,  H04L45/38

Abstract: An example method for service node originated service chains in a network environment is provided and includes receiving a packet at a service node in a network environment that includes a plurality of service nodes and a central classifier, analyzing the packet for a service chain modification or a service chain initiation, classifying the packet at the service node to a new service chain based on the analysis, initiating the new service chain at the service node if the analysis indicates service chain initiation, and modifying an existing service chain for the packet to the new service chain if the analysis indicates service chain modification. In specific embodiments, the analysis includes applying classification logic specific to the service node. Some embodiments, service node attributes and order of service nodes in substantially all service chains configured in the network may be received from a central controller.

Abstract translation: 提供了一种网络环境中服务节点发起的服务链的示例方法，包括在包括多个服务节点和中心分类器的网络环境中的服务节点处接收分组，分析服务链修改的分组或 服务链启动，基于分析将服务节点处的分组分类到新的服务链，如果分析指示服务链启动，则在服务节点处启动新的服务链，并将分组的现有服务链修改为新的 服务链如果分析表明服务链修改。 在具体实施例中，分析包括应用对服务节点特定的分类逻辑。 可以从中央控制器接收一些实施例，服务节点属性和在网络中配置的基本上所有服务链中的服务节点的顺序。

公开(公告)号：WO2015094567A1

公开(公告)日：2015-06-25

申请号：PCT/US2014/066629

申请日：2014-11-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： BOSCH, Hendrikus G. P. ,  GUICHARD, James N. ,  WARD, David D. ,  DUMINUCO, Alessandro ,  FERNANDO, Rex E. ,  QUINN, Paul

IPC: H04L12/707 ,  H04L12/713 ,  H04L12/715

CPC classification number: H04L45/20 ,  H04L45/04 ,  H04L45/24 ,  H04L45/28 ,  H04L45/586

Abstract: An example method is provided in one example embodiment and includes receiving a packet of a session from a previous hop router at a service zone of a service chain; recording the previous hop router for the session; determining an appliance to service the packet in the service zone using load balancing; recording an appliance identity for servicing the session in the service zone; determining a next hop router in the service chain for the packet using load balancing; and recording the next hop router for the session.

Abstract translation: 在一个示例实施例中提供了示例性方法，并且包括从服务链的服务区的前一跳路由器接收会话的分组; 记录会话的上一跳路由器; 确定使用负载平衡来服务所述服务区中的分组的设备; 记录在服务区域中为会话服务的设备身份; 使用负载平衡确定所述分组的服务链中的下一跳路由器; 并为会话记录下一跳路由器。