公开(公告)号：US09385950B2

公开(公告)日：2016-07-05

申请号：US14052968

申请日：2013-10-14

Applicant: Cisco Technology, Inc.

Inventor： Paul Quinn ,  James Guichard ,  Surendra Kumar

IPC: H04L12/28 ,  H04L12/741 ,  H04L12/931 ,  H04L29/08

CPC classification number: H04L45/74 ,  H04L45/306 ,  H04L49/354 ,  H04L49/70 ,  H04L67/327

Abstract: Presented herein are techniques in which a service proxy in a service node is configured to receive a packet encapsulated in a service header that includes a variable set of context headers. The service proxy is configured to use the context headers in the service header to map data in the packet to a local identifier that is associated with one of a plurality of service-functions hosted by the service node. The service proxy is further configured to forward the data in the packet to the service-function associated with the local identifier.

Abstract translation: 这里呈现的是其中服务节点中的服务代理被配置为接收封装在包括可变集上下文头部的服务头部中的分组的技术。 服务代理被配置为使用服务头部中的上下文头部将分组中的数据映射到与由服务节点托管的多个服务功能中的一个相关联的本地标识符。 服务代理还被配置为将分组中的数据转发到与本地标识符相关联的服务功能。

公开(公告)号：US20160006651A1

公开(公告)日：2016-01-07

申请号：US14851236

申请日：2015-09-11

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Paul Quinn ,  David Ward ,  Surendra Kumar ,  Nagaraj A. Bagepalli ,  Michael R. Smith ,  Navindra Yadav

IPC: H04L12/721 ,  H04L29/06 ,  H04L12/725

CPC classification number: H04L45/566 ,  H04L45/306 ,  H04L69/22

Abstract: Presented herein are techniques useful in a network comprising a plurality of network nodes each configured to apply one or more service functions to traffic that passes through the respective network nodes. A network node receives packets encapsulated in a service header that includes information defining a first set of context headers stacked into an association of metadata that is relevant to one or more service functions within a service path comprised of one or more network nodes. The network node performs at least one of the service functions in the service path and rewrites the service header with a second set of context headers. The second set of context headers include metadata derived from performing the service function(s) at the network node.

Abstract translation: 这里呈现的是在网络中有用的技术，其包括多个网络节点，每个网络节点被配置为将一个或多个服务功能应用于通过各个网络节点的业务。 网络节点接收封装在服务头部中的分组，其包括定义堆叠成与由一个或多个网络节点组成的服务路径内的一个或多个服务功能相关的元数据关联的第一组上下文标题的信息。 网络节点执行服务路径中的至少一个服务功能，并用第二组上下文头重写服务头部。 第二组上下文报头包括从在网络节点处执行服务功能导出的元数据。

公开(公告)号：US20150103827A1

公开(公告)日：2015-04-16

申请号：US14052968

申请日：2013-10-14

Applicant: Cisco Technology, Inc.

Inventor： Paul Quinn ,  James Guichard ,  Surendra Kumar

IPC: H04L12/741 ,  H04L12/931

CPC classification number: H04L45/74 ,  H04L45/306 ,  H04L49/354 ,  H04L49/70 ,  H04L67/327

Abstract: Presented herein are techniques in which a service proxy in a service node is configured to receive a packet encapsulated in a service header that includes a variable set of context headers. The service proxy is configured to use the context headers in the service header to map data in the packet to a local identifier that is associated with one of a plurality of service-functions hosted by the service node. The service proxy is further configured to forward the data in the packet to the service-function associated with the local identifier.

Abstract translation: 这里呈现的是其中服务节点中的服务代理被配置为接收封装在包括可变集上下文头部的服务头部中的分组的技术。 服务代理被配置为使用服务头部中的上下文头部将分组中的数据映射到与由服务节点托管的多个服务功能中的一个相关联的本地标识符。 服务代理还被配置为将分组中的数据转发到与本地标识符相关联的服务功能。

公开(公告)号：US20140334488A1

公开(公告)日：2014-11-13

申请号：US13891245

申请日：2013-05-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： James Guichard ,  Paul Quinn ,  David Ward ,  Surendra Kumar ,  Navindra Yadav ,  Michael R. Smith ,  Nagaraj A. Bagepalli

IPC: H04L12/851

CPC classification number: H04L45/306 ,  H04L41/0893 ,  H04L47/2441 ,  H04L69/22

Abstract: Techniques are provided to decouple service chain structure from the underlying network forwarding state and allow for data plane learning of service chain forwarding requirements and any association between services function state requirements and the forward and reverse forwarding paths for a service chain. In a network comprising a plurality of network nodes each configured to apply a service function to traffic that passes through the respective network node, a packet is received at a network node. When the network node determines that the service function it applies is stateful, it updates context information in a network service header of the packet to indicate that the service function applied at the network node is stateful and that traffic for a reverse path matching the classification criteria is to be returned to the network node.

Abstract translation: 提供了技术来将服务链结构与底层网络转发状态分离，并允许服务链转发要求的数据平面学习和服务功能状态要求与服务链的前向和后向转发路径之间的任何关联。 在包括多个网络节点的网络中，每个网络节点被配置为对通过相应网络节点的业务应用服务功能，在网络节点处接收分组。 当网络节点确定其应用的服务功能是有状态时，它更新分组的网络服务报头中的上下文信息，以指示在网络节点处应用的服务功能是有状态的，并且用于与分类标准匹配的反向路径的业务 将被返回到网络节点。