公开(公告)号：US20200007438A1

公开(公告)日：2020-01-02

申请号：US16558367

申请日：2019-09-03

申请人： Cisco Technology, Inc.

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

IPC分类号： H04L12/725 ,  H04L12/46

摘要： 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：US10148577B2

公开(公告)日：2018-12-04

申请号：US15449940

申请日：2017-03-04

申请人： CISCO TECHNOLOGY, INC.

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

IPC分类号： H04L12/741 ,  H04L29/06 ,  H04L12/803 ,  H04L29/08 ,  H04W72/04 ,  H04L12/725 ,  H04L12/721 ,  H04L12/851

摘要： 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：US09860340B2

公开(公告)日：2018-01-02

申请号：US15606267

申请日：2017-05-26

申请人： Cisco Technology, Inc.

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

IPC分类号： H04L12/28 ,  H04L29/08 ,  H04L12/24 ,  H04L12/721

CPC分类号： H04L67/327 ,  H04L41/0806 ,  H04L41/5054 ,  H04L41/5058 ,  H04L45/306 ,  H04L45/44

摘要： 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：US20170289032A1

公开(公告)日：2017-10-05

申请号：US15084332

申请日：2016-03-29

申请人： CISCO TECHNOLOGY, INC.

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

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

CPC分类号： H04L12/4641 ,  H04L45/306

摘要： 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：US09660909B2

公开(公告)日：2017-05-23

申请号：US14664629

申请日：2015-03-20

申请人： CISCO TECHNOLOGY, INC.

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

IPC分类号： H04L12/741 ,  H04L29/06 ,  H04W72/04 ,  H04L12/721 ,  H04L12/851 ,  H04L29/08

CPC分类号： H04L47/125 ,  H04L45/306 ,  H04L45/38 ,  H04L45/74 ,  H04L47/2408 ,  H04L47/2441 ,  H04L67/02 ,  H04L67/1023 ,  H04L67/327 ,  H04L69/22 ,  H04W72/0486

摘要： 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：US09398486B2

公开(公告)日：2016-07-19

申请号：US14300865

申请日：2014-06-10

申请人： CISCO TECHNOLOGY, INC.

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

IPC分类号： H04L12/28 ,  H04W28/02 ,  H04L12/46 ,  H04L12/721 ,  H04L12/725

CPC分类号： H04W28/0215 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/38

摘要： 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.

摘要翻译： 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：US09374297B2

公开(公告)日：2016-06-21

申请号：US14108994

申请日：2013-12-17

申请人： CISCO TECHNOLOGY, INC.

发明人： Hendrikus G. P. Bosch ,  James N. Guichard ,  David D. Ward ,  Alessandro Duminuco ,  Rex E. Fernando ,  Paul Quinn

IPC分类号： G06F15/173 ,  H04L12/733 ,  H04L12/707 ,  H04L12/713 ,  H04L12/715 ,  H04L12/703

CPC分类号： H04L45/20 ,  H04L45/04 ,  H04L45/24 ,  H04L45/28 ,  H04L45/586

摘要： An example method is provided in one example embodiment and includes receiving a packet of a session from a previous hop router at a service zone of a service chain; recording the previous hop router for the session; determining an appliance to service the packet in the service zone using load balancing; recording an appliance identity for servicing the session in the service zone; determining a next hop router in the service chain for the packet using load balancing; and recording the next hop router for the session.

摘要翻译： 在一个示例实施例中提供了示例性方法，并且包括从服务链的服务区的前一跳路由器接收会话的分组; 记录会话的上一跳路由器; 确定使用负载平衡来服务所述服务区中的分组的设备; 记录在服务区域中为会话服务的设备身份; 使用负载平衡确定所述分组的服务链中的下一跳路由器; 并为会话记录下一跳路由器。

公开(公告)号：US20150334027A1

公开(公告)日：2015-11-19

申请号：US14285843

申请日：2014-05-23

申请人： CISCO TECHNOLOGY, INC.

发明人： 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分类号： H04L12/851 ,  H04W72/04 ,  H04L12/801

CPC分类号： H04L47/2408 ,  H04L45/38 ,  H04L47/12 ,  H04L47/14 ,  H04W72/0493 ,  H04W88/16

摘要： 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.

公开(公告)号：US10812378B2

公开(公告)日：2020-10-20

申请号：US16252036

申请日：2019-01-18

申请人： Cisco Technology, Inc.

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

IPC分类号： H04L12/715 ,  H04L12/46

摘要： 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：US10187306B2

公开(公告)日：2019-01-22

申请号：US15080493

申请日：2016-03-24

申请人： CISCO TECHNOLOGY, INC.

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

IPC分类号： H04L12/801 ,  H04L12/715 ,  H04L12/46 ,  H04L29/06 ,  H04L29/08

摘要： 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.