公开(公告)号：US20170180257A1

公开(公告)日：2017-06-22

申请号：US15449940

申请日：2017-03-04

Applicant: CISCO TECHNOLOGY, INC.

Inventor： James N. Guichard ,  Paul Quinn ,  David D. Ward ,  Carlos M. Pignataro

IPC: H04L12/803 ,  H04L29/08 ,  H04L29/06

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.

公开(公告)号：US09571405B2

公开(公告)日：2017-02-14

申请号：US14631595

申请日：2015-02-25

Applicant: CISCO TECHNOLOGY, INC.

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

IPC: H04L12/851 ,  H04L12/741 ,  H04L12/801 ,  H04L29/06

CPC classification number: H04L47/2441 ,  H04L45/74 ,  H04L47/18 ,  H04L67/327 ,  H04L69/22

Abstract: A method for augmenting metadata of a network service header is disclosed. The method includes receiving, at a first service node, a packet or frame of a traffic flow, wherein the packet has a payload and the network service header including a first metadata and a first service path information for the traffic flow, classifying, by the first service node, at least one of the payload and the first metadata to generate a second metadata different from the first metadata, and augmenting, by the first service node, the first metadata using the second metadata before forwarding the packet or frame to a second service node.

Abstract translation: 公开了一种用于增强网络服务头部的元数据的方法。 该方法包括在第一服务节点处接收业务流的分组或帧，其中所述分组具有有效载荷，并且所述网络服务报头包括所述业务流的第一元数据和第一服务路径信​​息， 第一服务节点，有效载荷和第一元数据中的至少一个，以生成不同于第一元数据的第二元数据，以及在将数据包或帧转发到第二元数据之前由第一服务节点使用第二元数据来扩充第一元数据 服务节点。

公开(公告)号：US20150358850A1

公开(公告)日：2015-12-10

申请号：US14300865

申请日：2014-06-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Humberto J. La Roche, JR. ,  Hendrikus G.P. Bosch ,  James N. Guichard ,  Paul Quinn ,  Surendra M. Kumar ,  Kevin D. Shatzkamer

IPC: H04W28/02 ,  H04L12/721 ,  H04L12/851 ,  H04L12/46

CPC classification number: H04W28/0215 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/38

Abstract: A method provided in one embodiment includes receiving, at a first network element, a first data packet of a data flow, wherein the data flow is associated with a subscriber. The method further includes receiving subscriber information associated with the subscriber, and encapsulating the subscriber information with the first data packet to form an encapsulated data packet. The method still further includes determining a service chain including one or more services to which the encapsulated data packet is to be forwarded, and forwarding the encapsulated data packet to the service chain.

Abstract translation: 在一个实施例中提供的方法包括在第一网络元件处接收数据流的第一数据分组，其中所述数据流与订户相关联。 该方法还包括接收与用户相关联的用户信息，以及用第一数据分组封装用户信息以形成封装的数据分组。 该方法还包括确定包括一个或多个服务的服务链，封装的数据分组将被转发到该服务链上，并将封装的数据分组转发到服务链。

公开(公告)号：US20150295831A1

公开(公告)日：2015-10-15

申请号：US14249636

申请日：2014-04-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Surendra M. Kumar ,  Paul Quinn ,  James N. Guichard ,  Michael R. Smith

IPC: H04L12/803 ,  H04L12/851

CPC classification number: H04L47/125 ,  H04L12/28 ,  H04L12/56 ,  H04L47/2483 ,  H04L61/2514

Abstract: An example method for network address translation (NAT) offload to network infrastructure for service chains in a network environment is provided and includes receiving a packet at a network infrastructure in a network comprising a plurality of service nodes interconnected through the network infrastructure, each service node executing at least one service function, identifying the packet as belonging to a first flow based on a cookie in a network service header of the packet that indicates a service chain that includes a sequence of service functions to be executed on the packet at the service nodes, determining that a service function in the service chain is to be offloaded from one of the service nodes to the network infrastructure for subsequent packets of the first flow, and executing the offloaded service function at the network infrastructure for subsequent packets of the first flow.

Abstract translation: 提供了一种用于网络地址转换（NAT）卸载到网络环境中的服务链的网络基础设施的示例性方法，并且包括在网络中的网络基础设施处接收包括通过网络基础设施互连的多个服务节点的分组，每个服务节点 执行至少一个服务功能，基于所述分组的网络服务报头中的cookie来将分组标识为属于第一流的分组，其指示服务链，所述服务链包括将在所述服务节点处对所述分组执行的服务功能序列 确定所述服务链中的服务功能将从所述服务节点之一卸载到所述网络基础设施以用于所述第一流的后续分组，以及在所述网络基础设施处执行所述卸载的服务功能以用于所述第一流的后续分组。

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：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：US11082308B2

公开(公告)日：2021-08-03

申请号：US16383956

申请日：2019-04-15

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/24

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.

公开(公告)号：US10812378B2

公开(公告)日：2020-10-20

申请号：US16252036

申请日：2019-01-18

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/715 ,  H04L12/46

Abstract: An apparatus having logic elements to receive an incoming packet associated with a first service function chain; identify a next hop service function for the incoming packet as a non-reactive service function; create a duplicate packet; forward the duplicate packet to the non-reactive service function; and forward the incoming packet to a next reactive service function. An apparatus having logic to receive an incoming packet associated with a first service function chain (SFC), having a first service path identifier (SPI); determine that the incoming packet has a first service index (SI), and that a next-hop SI identifies a non-reactive service function (NRSF); receive a duplicate packet of the incoming packet; rewrite a service header of the duplicate packet to identify a second SFC having a second SPI; and alter the first SI of the incoming packet to identify a next reactive service function in the first SFC.

公开(公告)号：US20190327165A1

公开(公告)日：2019-10-24

申请号：US16458699

申请日：2019-07-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Reinaldo Penno ,  Paul Quinn ,  Carlos M. Pignataro

IPC: H04L12/26

Abstract: In one embodiment, a method includes receiving a trace request packet at a service node on a service chain, the trace request packet comprising a service index limit that remains constant for use in identifying at least one service node in the service chain to generate a trace report packet, and processing the trace request packet and determining whether to forward the trace request packet on the service chain or to generate the trace report packet based on a comparison of a service index to the service index limit in the trace request packet, wherein the trace report packet includes service function information of a plurality of service functions in the service chain, and the trace request packet is forwarded on the service chain according to a service path identifier and the service index.