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：US11343178B2

公开(公告)日：2022-05-24

申请号：US16558367

申请日：2019-09-03

Applicant: Cisco Technology, Inc.

Inventor： Prashanth Patil ,  K Tirumaleswar Reddy ,  Steven Richard Stites ,  James N. Guichard

IPC: H04L45/64 ,  H04L45/302 ,  H04L12/46 ,  H04L47/31 ,  H04L47/11

Abstract: A network node in a service function chain system receives a peer detection packet from a service function device in a service function path. The peer detection packet includes an inner packet with a header, such as a network service header. The network node detects a status indicator in the header that indicates a degradation in performing a service function at the service function device. The network node adjusts the service function path to compensate for the degradation in performing the service function at the service function device.

公开(公告)号：US10165092B2

公开(公告)日：2018-12-25

申请号：US15152213

申请日：2016-05-11

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Yixing Ruan ,  James N. Guichard ,  Javed Asghar ,  Carlos M. Pignataro ,  Kenneth Eugene Gray

IPC: H04L12/701 ,  H04L12/801 ,  H04L29/06 ,  H04L12/46 ,  H04L12/725 ,  H04L12/721 ,  H04L12/713

Abstract: Aspects of the embodiments are directed to augmenting a control packet with an interface identifier, the interface identifier identifying an interface at a physical network forwarding element; and transmitting the control packet with the interface identifier to the physical network forwarding element. The interface identifier can be included in metadata of a network service header (NSH). The NSH is encapsulated with the control packet, which is transmitted with the control packet. The NSH can be extracted and the interface identifier used to identify a user interface (or a presenting interface) based on a metadata lookup.

公开(公告)号：US10142128B2

公开(公告)日：2018-11-27

申请号：US15784218

申请日：2017-10-16

Applicant: Cisco Technology, Inc.

Inventor： James N. Guichard ,  Paul Quinn ,  Javed Asghar ,  Reinaldo Penno ,  Yixing Ruan ,  Carlos M. Pignataro

IPC: H04L12/801 ,  H04L12/28 ,  H04L12/751 ,  H04L1/04 ,  H04Q11/04 ,  H04L12/46 ,  H04L29/06

Abstract: A method for applying network services to data traffic forwarded between virtual private network (VPN) sites includes: receiving a data packet addressed to a target site associated with the VPN, determining services to be applied to the data packet according to a service chain, where the determining is a function of at least one of the VPN, the origin site or the target site, adding an indication of a VPN forwarding context onto the data packet, encapsulating the data packet with Network Service Header encapsulation, where a header for the encapsulated data packet indicates at least the service chain; forwarding the encapsulated data packet in accordance with the service chain, receiving the encapsulated data packet at the end of the service chain, terminating the service chain, removing the encapsulation, and forwarding the data packet to a target destination per the indication of a VPN forwarding context.

公开(公告)号：US09954774B2

公开(公告)日：2018-04-24

申请号：US15066467

申请日：2016-03-10

Applicant: Cisco Technology, Inc.

Inventor： Prashanth Patil ,  K. Tirumaleswar Reddy ,  Gonzalo Salgueiro ,  James N. Guichard ,  Carlos M. Pignataro

IPC: H04L12/721

CPC classification number: H04L45/566 ,  H04L45/302

Abstract: In one embodiment, a service function classifier device determines a classification of a packet using one or more packet classification rules. The device selects a service function path based on the classification of the packet. The device determines one or more traffic flow characteristics based on the classification of the packet. The device generates a service function chaining (SFC) header that identifies the selected service function path and the determined one or more traffic flow characteristics. The SFC header is configured to cause a device along the service function path to forward the encapsulated packet based on the identified service function path and the determined one or more traffic flow characteristics. The device sends the packet along the selected service function path as an encapsulated packet that includes the generated SFC header.

公开(公告)号：US09825778B2

公开(公告)日：2017-11-21

申请号：US14870722

申请日：2015-09-30

Applicant: Cisco Technology, Inc.

Inventor： James N. Guichard ,  Paul Quinn ,  Javed Asghar ,  Reinaldo Penno ,  Yixing Ruan ,  Carlos M. Pignataro

IPC: G01R31/08 ,  H04L12/28 ,  H04J3/16 ,  H04L12/46 ,  H04L29/06

CPC classification number: H04L12/4633 ,  H04L63/0272

Abstract: A method for applying network services to data traffic forwarded between virtual private network (VPN) sites includes: receiving a data packet addressed to a target site associated with the VPN, determining services to be applied to the data packet according to a service chain, where the determining is a function of at least one of the VPN, the origin site or the target site, adding an indication of a VPN forwarding context onto the data packet, encapsulating the data packet with Network Service Header encapsulation, where a header for the encapsulated data packet indicates at least the service chain; forwarding the encapsulated data packet in accordance with the service chain, receiving the encapsulated data packet at the end of the service chain, terminating the service chain, removing the encapsulation, and forwarding the data packet to a target destination per the indication of a VPN forwarding context.

公开(公告)号：US20170264713A1

公开(公告)日：2017-09-14

申请号：US15606267

申请日：2017-05-26

Applicant: Cisco Technology, Inc.

Inventor： Naiming Shen ,  Keyur P. Patel ,  Carlos M. Pignataro ,  James N. Guichard

IPC: H04L29/08 ,  H04L12/721 ,  H04L12/24

CPC classification number: H04L67/327 ,  H04L41/0806 ,  H04L41/5054 ,  H04L41/5058 ,  H04L45/306 ,  H04L45/44

Abstract: A system comprising a plurality of service nodes, a controller and a network device in communication with the controller. Each of the plurality of service nodes is configured to support one or more service functions to establish a service function chain that includes a plurality of service functions to be performed by routing traffic among the plurality of service nodes. The controller is configured to generate provisioning information for the service function chain. The provisioning information includes at least one condition upon which a service function reclassification or branching operation is to be performed by at least one service node. The network device is in communication with the controller, and is configured to distribute the provisioning information for the service function chain to the plurality of service nodes using a distributed routing protocol.

公开(公告)号：US20170244631A1

公开(公告)日：2017-08-24

申请号：US15049521

申请日：2016-02-22

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/723 ,  H04L12/741

CPC classification number: H04L45/50 ,  H04L45/306 ,  H04L45/74

Abstract: In one embodiment, a device in a network receives a packet that includes one or more forwarding labels and a service function chaining (SFC) header. The device removes the one or more forwarding labels from the packet. The device inserts an indication of the one or more forwarding labels into metadata of the SFC header. The device forwards the packet with the inserted indication of the one or more forwarding labels to a service function.

公开(公告)号：US09608896B2

公开(公告)日：2017-03-28

申请号：US15092117

申请日：2016-04-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Surendra M. Kumar ,  Nagaraj A. Bagepalli ,  Abhijit Patra ,  Paul Quinn ,  James N. Guichard ,  Hendrikus G. P. Bosch

IPC: H04L12/28 ,  H04L12/751 ,  H04L12/24 ,  H04L12/725 ,  H04L12/721

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.