公开(公告)号：US09755959B2

公开(公告)日：2017-09-05

申请号：US13944050

申请日：2013-07-17

Applicant: Cisco Technology, Inc.

Inventor： James Guichard ,  Paul Quinn ,  Surendra Kumar ,  Govind P. Sharma ,  Abhijit Patra

IPC: G06F15/173 ,  H04L12/725 ,  H04L29/08

CPC classification number: H04L45/30 ,  H04L67/16 ,  H04L67/18

Abstract: Presented herein are techniques for dynamic creation of a unique service path for a service chain. In one example, a service controller and a plurality of service nodes are provided, each service node configured to apply a service function to traffic that passes through the respective service node. The service controller defines a service chain identifying a set of service functions and an order in which they are applied. The service controller receives an indication that the service chain has been instantiated at a classifier, and creates a unique service path for the service chain, wherein the unique service path includes the service chain and the classifier at which the service chain is instantiated.

公开(公告)号：US20150281173A1

公开(公告)日：2015-10-01

申请号：US14225279

申请日：2014-03-25

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Paul Quinn ,  Jim Guichard ,  Surendra Kumar ,  Peter Bosch

IPC: H04L29/12

CPC classification number: H04L61/256 ,  H04L41/0893 ,  H04L61/2507 ,  H04L61/6068

Abstract: In one embodiment, a method includes receiving a packet associated with a flow at a network device, classifying the packet at the network device based on information received from a policy layer, inserting a Network Address Translation (NAT) indicator for the flow into the packet, and transmitting the packet in a service chain comprising network address translation. The NAT indicator is associated with the flows before and after network address translation to provide symmetry between the service chain and a return traffic service chain. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括接收与网络设备上的流相关联的分组，基于从策略层接收的信息对网络设备上的分组进行分类，将流的网络地址转换（NAT）指示符插入到分组中 并且在包括网络地址转换的服务链中传送分组。 NAT指示符与网络地址转换之前和之后的流相关联，以提供服务链和返回业务链之间的对称性。 本文还公开了一种装置和逻辑。

公开(公告)号：US20150222640A1

公开(公告)日：2015-08-06

申请号：US14170750

申请日：2014-02-03

Applicant: Cisco Technology, Inc.

Inventor： Surendra Kumar ,  David Chang ,  Nagaraj Bagepalli ,  Abhijit Patra

IPC: H04L29/06 ,  H04L12/803 ,  H04L12/911

CPC classification number: H04L47/125 ,  H04L41/50 ,  H04L45/38 ,  H04L47/782 ,  H04L63/20

Abstract: Presented herein are elastic service chain techniques. In one example, a network element receives data traffic to be processed by a service chain that specifies an ordered sequence of service pools including a first service pool and second service pool, wherein each service pool comprises a plurality of network services. A network service is determined from the first service pool to be applied to the data traffic, and data traffic is forwarded to the network service in the first service pool.

Abstract translation: 这里提出的是弹性服务链技术。 在一个示例中，网络元件接收要由服务链处理的数据流量，所述服务链指定包括第一服务池和第二服务池的服务池的有序序列，其中每个服务池包括多个网络服务。 从要应用于数据流量的第一服务池确定网络服务，并将数据流量转发到第一服务池中的网络服务。

公开(公告)号：US20150215172A1

公开(公告)日：2015-07-30

申请号：US14168447

申请日：2014-01-30

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Surendra Kumar ,  Nagaraj Bagepalli ,  Abhijit Patra ,  Paul Quinn ,  James Guichard ,  Jayaraman Iyer

IPC: H04L12/24

CPC classification number: H04L43/026 ,  H04L41/5041

Abstract: Presented herein are service-function chaining techniques. In one example, a service controller in a network comprising a plurality of service nodes receives one is configured to identify one or more service-functions hosted by each of the service nodes. The service controller defines a service-function chain in terms of service-functions to be applied to traffic in the network and provides information descriptive of the service-function chain to a classifier node.

Abstract translation: 这里提供的是服务功能链接技术。 在一个示例中，包括多个服务节点的网络中的服务控制器接收一个服务控制器被配置为识别由每个服务节点托管的一个或多个服务功能。 服务控制器根据服务功能定义服务功能链，以应用于网络中的流量，并向分类器节点提供描述服务功能链的信息。

公开(公告)号：US20140362857A1

公开(公告)日：2014-12-11

申请号：US13910179

申请日：2013-06-05

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/721

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 variable 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 interprets a forwarding state and a next-hop network node for the service path from the service header, and determines a service action or associated metadata from the set of context headers.

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，该分组包括定义一组上下文标题的信息，这些信息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。 网络节点从服务头解释用于服务路径的转发状态和下一跳网络节点，并且从上下文头集合中确定服务动作或相关联的元数据。

公开(公告)号：US10153951B2

公开(公告)日：2018-12-11

申请号：US15711625

申请日：2017-09-21

Applicant: Cisco Technology, Inc.

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

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

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：US09614739B2

公开(公告)日：2017-04-04

申请号：US14168447

申请日：2014-01-30

Applicant: Cisco Technology, Inc.

Inventor： Surendra Kumar ,  Nagaraj Bagepalli ,  Abhijit Patra ,  Paul Quinn ,  James Guichard ,  Jayaraman Iyer

IPC: G06F15/16 ,  H04L12/26 ,  H04L12/24

CPC classification number: H04L43/026 ,  H04L41/5041

Abstract: Presented herein are service-function chaining techniques. In one example, a service controller in a network comprising a plurality of service nodes receives one is configured to identify one or more service-functions hosted by each of the service nodes. The service controller defines a service-function chain in terms of service-functions to be applied to traffic in the network and provides information descriptive of the service-function chain to a classifier node.

公开(公告)号：US09444675B2

公开(公告)日：2016-09-13

申请号：US13912224

申请日：2013-06-07

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

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.

Abstract translation: 这里呈现的是在包括多个网络节点的网络中执行的技术，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服务路径中的相应网络节点的业务。 在网络节点处，接收到应用于网络节点处的业务的一个或多个服务功能或应用的故障或劣化的指示。 产生描述故障或退化的数据。 确定应用服务功能或应用程序到服务路径中的业务的先前服务跳网络节点。 将描述故障或劣化的数据传送到先前的服务跳网络节点。

公开(公告)号：US20160099867A1

公开(公告)日：2016-04-07

申请号：US14966737

申请日：2015-12-11

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/725 ,  H04L12/851 ,  H04L29/06

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。

公开(公告)号：US09178812B2

公开(公告)日：2015-11-03

申请号：US13910179

申请日：2013-06-05

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

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 variable 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 interprets a forwarding state and a next-hop network node for the service path from the service header, and determines a service action or associated metadata from the set of context headers.

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，该分组包括定义一组上下文标题的信息，这些信息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。 网络节点从服务头解释用于服务路径的转发状态和下一跳网络节点，并且从上下文头集合中确定服务动作或相关联的元数据。