公开(公告)号：US09806962B2

公开(公告)日：2017-10-31

申请号：US15223235

申请日：2016-07-29

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Carlos M. Pignataro ,  David Ward ,  Paul Quinn ,  Surendra Kumar

IPC: H04L1/00 ,  H04L12/24 ,  H04L12/26 ,  H04L12/703 ,  H04L12/725 ,  H04L12/723 ,  H04L29/08

CPC classification number: H04L41/5009 ,  H04L41/0654 ,  H04L41/0668 ,  H04L41/5038 ,  H04L41/5077 ,  H04L43/0823 ,  H04L43/50 ,  H04L45/28 ,  H04L45/302 ,  H04L45/50 ,  H04L67/10

Abstract: Presented herein are techniques performed in a network comprising a plurality of network nodes each configured to apply one or more service functions to traffic that passes the respective network nodes in a service path. At a network node, an indication is received of a failure or degradation of one or more service functions or applications applied to traffic at the network node. Data descriptive of the failure or degradation is generated. A previous service hop network node at which a service function or application was applied to traffic in the service path is determined. The data descriptive of the failure or degradation is communicated to the previous service hop network node.

公开(公告)号：US09537752B2

公开(公告)日：2017-01-03

申请号：US14449601

申请日：2014-08-01

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Paul Quinn

IPC: H04L12/715 ,  H04L12/911

CPC classification number: H04L45/04 ,  H04L45/64 ,  H04L47/781 ,  H04L47/782

Abstract: Techniques are presented to enable the instantiation of a service chain that is comprised of service functions belonging to one or more administrative domains. A service chain consisting of one or more service functions in one administrative domain is made available to another administrative domain through an advertisement. This enables the building of inter-domain service chains without the need to share between the administrative domains details about the service chains and service functions in the respective administrative domains.

Abstract translation: 呈现技术以实现由属于一个或多个管理域的服务功能组成的服务链的实例化。 在一个管理域中由一个或多个服务功能组成的服务链通过广告提供给另一个管理域。 这样可以构建域间服务链，而无需在管理域之间共享关于各个管理域中服务链和服务功能的详细信息。

公开(公告)号：US09438512B2

公开(公告)日：2016-09-06

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 ,  H04L12/725 ,  H04L29/06

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：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：US20160134481A1

公开(公告)日：2016-05-12

申请号：US14587981

申请日：2014-12-31

Applicant: Cisco Technology, Inc.

Inventor： Nobushige Akiya ,  Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Paul Quinn ,  James Guichard

IPC: H04L12/24

CPC classification number: H04L41/5058 ,  H04L41/5038

Abstract: In one embodiment, a system and method are disclosed for sending a request and receiving a reply. The request contains a network service header including a flow label field and a target index field. The flow label field contains a set of available flow labels. The target index field includes a value indicating a target node. The reply contains information indicating which of the flow labels can be used to route a packet to each of the next hop nodes downstream from the device that sent the reply. This process can be repeated for other nodes on a path, and other paths in a service topology layer. The information determined by this process can be used to perform other necessary functionalities at the service topology layer.

Abstract translation: 在一个实施例中，公开了用于发送请求并接收回复的系统和方法。 请求包含包括流标签字段和目标索引字段的网​​络服务头。 流标签字段包含一组可用流标签。 目标索引字段包括指示目标节点的值。 答复包含指示哪些流标签可以用于将分组路由到发送回复的设备下游的下一跳节点的信息。 可以对路径上的其他节点以及服务拓扑层中的其他路径重复此过程。 该过程确定的信息可用于在服务拓扑层执行其他必要的功能。

公开(公告)号：US20160119226A1

公开(公告)日：2016-04-28

申请号：US14522974

申请日：2014-10-24

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Paul Quinn ,  Carlos M. Pignataro

IPC: H04L12/725 ,  H04L29/06

CPC classification number: H04L45/306 ,  H04L29/0653 ,  H04L45/00 ,  H04L45/38 ,  H04L47/2475

Abstract: A controller that is in communication with the plurality of network nodes establishes a service path for a service chain defined by an ordered sequence of service functions to be performed at respective ones of one or more of the plurality of network nodes. The controller assigns a predetermined service path identifier and a predetermined service index value for a segment of the service chain that includes only one or more network nodes not capable of decapsulating packets to extract a network service header so as to designate the one or more network nodes determined not capable of decapsulating packets to extract the network service header as a single service hop segment in the service chain.

Abstract translation: 与所述多个网络节点通信的控制器为由所述多个网络节点中的一个或多个网络节点中的一个或多个的相应的一个服务功能定义的服务链建立服务路径。 控制器为仅包括一个或多个不能解包分组的网络节点的服务链的段分配预定的服务路径标识符和预定的服务索引值，以提取网络服务头，以便指定一个或多个网络节点 确定不能解包分组，以将服务链中的单个服务跳段提取为网络服务头。

公开(公告)号：US20160014016A1

公开(公告)日：2016-01-14

申请号：US14449601

申请日：2014-08-01

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Paul Quinn

IPC: H04L12/715 ,  H04L12/911

CPC classification number: H04L45/04 ,  H04L45/64 ,  H04L47/781 ,  H04L47/782

Abstract: Techniques are presented to enable the instantiation of a service chain that is comprised of service functions belonging to one or more administrative domains. A service chain consisting of one or more service functions in one administrative domain is made available to another administrative domain through an advertisement. This enables the building of inter-domain service chains without the need to share between the administrative domains details about the service chains and service functions in the respective administrative domains.

Abstract translation: 呈现技术以实现由属于一个或多个管理域的服务功能组成的服务链的实例化。 在一个管理域中由一个或多个服务功能组成的服务链通过广告提供给另一个管理域。 这样可以构建域间服务链，而无需在管理域之间共享关于各个管理域中服务链和服务功能的详细信息。

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。