公开(公告)号：US20180205643A1

公开(公告)日：2018-07-19

申请号：US15922253

申请日：2018-03-15

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：US20170331737A1

公开(公告)日：2017-11-16

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: H04L12/741 ,  H04L12/813 ,  H04L29/12 ,  H04L29/06

CPC classification number: H04L69/22 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/566 ,  H04L45/586 ,  H04L45/64

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：US20170324654A1

公开(公告)日：2017-11-09

申请号：US15656474

申请日：2017-07-21

Applicant: Cisco Technology, Inc.

Inventor： Stefano Benedetto Previdi ,  James N. Guichard ,  Clarence Filsfils ,  Carlos M. Pignataro

IPC: H04L12/723 ,  H04L12/851 ,  H04L12/741 ,  H04L12/725 ,  H04L29/06 ,  H04L12/46

CPC classification number: H04L45/507 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/50 ,  H04L45/74 ,  H04L47/2441 ,  H04L69/22

Abstract: In one embodiment, a device in a network receives a packet that includes a forwarding label for a service in a service chain. The packet encapsulates a service chain header for the service chain. The device swaps the forwarding label for the service in the packet for a reserved label that identifies the packet as encapsulating the service chain header. The device forwards the packet with the reserved label to the service.

公开(公告)号：US20170279712A1

公开(公告)日：2017-09-28

申请号：US15080493

申请日：2016-03-24

Applicant: CISCO TECHNOLOGY, INC.

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

IPC: H04L12/715 ,  H04L29/06 ,  H04L29/08 ,  H04L12/46

CPC classification number: H04L45/64 ,  H04L12/4633 ,  H04L12/4641 ,  H04L67/32 ,  H04L69/22

Abstract: There is disclosed 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. There is also disclosed 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, wherein the second SPI is different from the first 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：US20170257310A1

公开(公告)日：2017-09-07

申请号：US15058259

申请日：2016-03-02

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/725 ,  H04L12/46 ,  H04L29/08

CPC classification number: H04L45/306 ,  H04L12/4633 ,  H04L45/64 ,  H04L47/115 ,  H04L47/31

Abstract: At a service function node configured to perform at least one service function on a data flow that follows a service function path, degradation in performing the service function is detected. The service function node generates a status indicator for the degradation in performing the service function and inserts the status indicator into a peer detection packet. The peer detection packet encapsulates an inner packet with a header that indicates the service function path. The service function node forwards the peer detection packet to a neighboring service function node along the service function path.

公开(公告)号：US20170005920A1

公开(公告)日：2017-01-05

申请号：US14825273

申请日：2015-08-13

Applicant: Cisco Technology, Inc.

Inventor： Stefano Benedetto Previdi ,  James N. Guichard ,  Clarence Filsfils ,  Carlos M. Pignataro

IPC: H04L12/723 ,  H04L12/46 ,  H04L12/741

CPC classification number: H04L45/507 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/50 ,  H04L45/74 ,  H04L47/2441 ,  H04L69/22

Abstract: In one embodiment, a device in a network receives a packet that includes a forwarding label for a service in a service chain. The packet encapsulates a service chain header for the service chain. The device swaps the forwarding label for the service in the packet for a reserved label that identifies the packet as encapsulating the service chain header. The device forwards the packet with the reserved label to the service.

Abstract translation: 在一个实施例中，网络中的设备接收包括用于服务链中的服务的转发标签的分组。 该分组封装了服务链的服务链头。 该设备将数据包中的服务的转发标签交换为将包定义为封装服务链头的保留标签。 设备将保留标签的报文转发给业务。

公开(公告)号：US09479443B2

公开(公告)日：2016-10-25

申请号：US14285843

申请日：2014-05-23

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hendrikus G. P. Bosch ,  Ian McDowell Campbell ,  Humberto J. La Roche ,  James N. Guichard ,  Surendra M. Kumar ,  Paul Quinn ,  Alessandro Duminuco ,  Jeffrey Napper ,  Ravi Shekhar

IPC: H04L12/851 ,  H04L12/801 ,  H04W72/04 ,  H04L12/721 ,  H04W88/16

CPC classification number: H04L47/2408 ,  H04L45/38 ,  H04L47/12 ,  H04L47/14 ,  H04W72/0493 ,  H04W88/16

Abstract: An example method is provided in one example embodiment and may include receiving a packet for a subscriber at a gateway, wherein the gateway includes a local policy anchor for interfacing with one or more policy servers and one or more classifiers for interfacing with one or more service chains, each service chain including one or more services accessible by the gateway; determining a service chain to receive the subscriber's packet; appending the subscriber's packet with a header, wherein the header includes, at least in part, identification information for the subscriber and an Internet Protocol (IP) address for the local policy anchor; and injecting the packet including the header into the service chain determined for the subscriber.

Abstract translation: 在一个示例性实施例中提供了示例性方法，并且可以包括在网关处接收订户的分组，其中所述网关包括用于与一个或多个策略服务器进行接口的本地策略锚点以及用于与一个或多个服务 每个服务链包括由网关可访问的一个或多个服务; 确定服务链以接收订户的分组; 用标题附加订户的分组，其中该报头至少部分地包括用户的标识信息和用于本地策略锚的因特网协议（IP）地址; 以及将包括所述头部的分组注入到为所述用户确定的服务链中。

公开(公告)号：US20160218956A1

公开(公告)日：2016-07-28

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: H04L12/751 ,  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.

公开(公告)号：US10225104B2

公开(公告)日：2019-03-05

申请号：US15084332

申请日：2016-03-29

Applicant: CISCO TECHNOLOGY, INC.

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

IPC: H04L12/46 ,  H04L12/725

Abstract: Embodiments of the present disclosure are directed to augmenting a Network Service Header (NSH) metadata of a data packet with a virtual routing and forwarding identifier (VRF-ID) and forgoing augmenting a virtual private network (VPN) label into a multiprotocol label switched (MPLS) metadata of the data packet. A provider edge router can use the VRF-ID to identify a next hop for the data packet as a service to be applied prior to forwarding the data packet to a VPN site.

公开(公告)号：US20170264537A1

公开(公告)日：2017-09-14

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.