公开(公告)号：US20180152374A1

公开(公告)日：2018-05-31

申请号：US15824922

申请日：2017-11-28

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong ,  Donald E. Eastlake, III

IPC: H04L12/705 ,  H04L12/741 ,  H04L29/08 ,  H04L12/833

CPC classification number: H04L45/18 ,  H04L45/74 ,  H04L47/31 ,  H04L67/16 ,  H04L69/40

Abstract: A method implemented by a service function forwarder (SFF) comprises receiving, by a receiver of the SFF, a service chain packet comprising a loop prevention field, the loop prevention field comprising a plurality of bits indicating whether an error has occurred during packet transmission, and determining, by a processor of the SFF, whether to forward the service chain packet based on a value in the loop prevention field being less than a predefined parameter, the predefined parameter based on a number of bits (n) in the loop prevention field.

公开(公告)号：US20150195197A1

公开(公告)日：2015-07-09

申请号：US14584932

申请日：2014-12-29

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong ,  Linda Dunbar

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/54

CPC classification number: H04L45/74 ,  H04L45/38 ,  H04L45/64 ,  H04L2212/00

Abstract: Service function chaining is a sequence of service function instances that traffic flows need to traverse through in order. Those service function instances are not required to reside on the direct path and traffic flow, but steered through network nodes. Service function instances and network nodes process the packets that carry a service function chain (SFC) header. The packets are encapsulated by a virtual network overlay header and forwarded through the service function instances in an SFC. The SFC header in specific format will prompt the network nodes to re-route the packets in the traffic flow using destination based forwarding or path based forwarding method in the packet network as well as an SDN controller and/or in-band control plane, and able to carry the metadata with the packets.

Abstract translation: 服务功能链接是业务流需要按顺序遍历的一系列服务功能实例。 这些服务功能实例不需要驻留在直接路径和流量流上，而是通过网络节点引导。 服务功能实例和网络节点处理携带服务功能链（SFC）头的数据包。 数据包由虚拟网络覆盖头封装，并通过SFC中的服务功能实例进行转发。 特定格式的SFC头将提示网络节点使用分组网络中的基于目的地的转发或基于路径的转发方法来重新路由业务流中的分组，以及SDN控制器和/或带内控制平面，以及 能够携带数据包的元数据。

公开(公告)号：US09843507B2

公开(公告)日：2017-12-12

申请号：US14258302

申请日：2014-04-22

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong

IPC: H04L12/28 ,  H04L12/723 ,  H04L12/715 ,  H04L12/721 ,  H04L12/801 ,  H04L12/931

CPC classification number: H04L45/502 ,  H04L45/04 ,  H04L45/50 ,  H04L45/68 ,  H04L47/33 ,  H04L49/354

Abstract: A network apparatus comprising a trunk end point associated with an Ethernet-tree (E-Tree) service in a network domain and configured to forward a frame that comprises a tag according to the tag in the frame, wherein the tag in the frame is a root tag that indicates a root source of the frame or a leaf tag that indicates a leaf source of the frame, and wherein the trunk end point is coupled to a second end point associated with the E-tree service outside the network domain.

公开(公告)号：US09825856B2

公开(公告)日：2017-11-21

申请号：US14584932

申请日：2014-12-29

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong ,  Linda Dunbar

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/715

CPC classification number: H04L45/74 ,  H04L45/38 ,  H04L45/64 ,  H04L2212/00

Abstract: Service function chaining is a sequence of service function instances that traffic flows need to traverse through in order. Those service function instances are not required to reside on the direct path and traffic flow, but steered through network nodes. Service function instances and network nodes process the packets that carry a service function chain (SFC) header. The packets are encapsulated by a virtual network overlay header and forwarded through the service function instances in an SFC. The SFC header in specific format will prompt the network nodes to re-route the packets in the traffic flow using destination based forwarding or path based forwarding method in the packet network as well as an SDN controller and/or in-band control plane, and able to carry the metadata with the packets.

公开(公告)号：US20170019331A1

公开(公告)日：2017-01-19

申请号：US15208347

申请日：2016-07-12

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong

IPC: H04L12/715 ,  H04L12/723 ,  H04L29/12 ,  H04L12/46

CPC classification number: H04L45/64 ,  H04L12/4633 ,  H04L45/22 ,  H04L45/50

Abstract: A first network element (NE) comprises a receiver configured to receive a tunnel redirection request message from a second NE, wherein the tunnel redirection request message is a request to re-route packets to a third NE instead of the second NE, wherein the tunnel redirection request message comprises an address of the third NE and a first destination address, wherein the packets comprise the first destination address. A processor of the NE is coupled to the receiver and configured to add an outer header and an encapsulation header to a first subset of the packets, wherein the outer header comprises the address of the third NE, and wherein the encapsulation header comprises an identifier of an encapsulation protocol supported by the third NE, and a transmitter coupled to the processor and configured to transmit the first subset of the packets to the third NE via an overlay tunnel, and transmit a second subset of packets to the second NE.

Abstract translation: 第一网元（NE）包括：接收器，被配置为从第二NE接收隧道重定向请求消息，其中所述隧道重定向请求消息是将分组重新路由到第三NE而不是所述第二NE的请求，其中所述隧道 重定向请求消息包括第三网元的地址和第一目的地地址，其中分组包括第一目的地地址。 NE的处理器耦合到接收器并且被配置为向分组的第一子集添加外部报头和封装报头，其中外部报头包括第三个NE的地址，并且其中封装报头包括 由第三NE支持的封装协议，以及耦合到处理器并被配置为经由覆盖隧道将分组的第一子集发送到第三NE的发射机，并向第二NE发送分组的第二子集。

公开(公告)号：US10313235B2

公开(公告)日：2019-06-04

申请号：US15208347

申请日：2016-07-12

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/723 ,  H04L12/707

Abstract: A first network element (NE) comprises a receiver configured to receive a tunnel redirection request message from a second NE, wherein the tunnel redirection request message is a request to re-route packets to a third NE instead of the second NE, wherein the tunnel redirection request message comprises an address of the third NE and a first destination address, wherein the packets comprise the first destination address. A processor of the NE is coupled to the receiver and configured to add an outer header and an encapsulation header to a first subset of the packets, wherein the outer header comprises the address of the third NE, and wherein the encapsulation header comprises an identifier of an encapsulation protocol supported by the third NE, and a transmitter coupled to the processor and configured to transmit the first subset of the packets to the third NE via an overlay tunnel, and transmit a second subset of packets to the second NE.

公开(公告)号：US09660905B2

公开(公告)日：2017-05-23

申请号：US14251397

申请日：2014-04-11

Applicant: Futurewei Technologies, Inc.

Inventor： Linda Dunbar ,  Lucy Yong

IPC: H04L12/26 ,  H04L12/721 ,  H04L12/715 ,  H04L29/08 ,  H04L12/24

CPC classification number: H04L45/44 ,  H04L41/5054 ,  H04L45/38 ,  H04L45/64 ,  H04L67/10

Abstract: A method forwarding data traffic based on a service chain policy for distributed gateway located within a network virtualization edge (NVE). The NVE may receive, within a first virtual overlay network, a data packet destined for a destination tenant end point located in a second virtual overlay network. The NVE may determine that a network service function is unavailable to treat the data packet between the first virtual overlay network and the second virtual overlay network. In order to route the data packet, the NVE may obtain a service chain policy that provides the location of a network node configured to treat the data packet with the network service function. The NVE may transmit the data packet toward the network node. A service chain policy may correspond to a sequence of network nodes that represents a path to the destination tenant end point.

公开(公告)号：US20140307744A1

公开(公告)日：2014-10-16

申请号：US14251397

申请日：2014-04-11

Applicant: FUTUREWEI TECHNOLOGIES, INC.

Inventor： Linda Dunbar ,  Lucy Yong

IPC: H04L12/721

CPC classification number: H04L45/44 ,  H04L41/5054 ,  H04L45/38 ,  H04L45/64 ,  H04L67/10

Abstract: A method forwarding data traffic based on a service chain policy for distributed gateway located within a network virtualization edge (NVE). The NVE may receive, within a first virtual overlay network, a data packet destined for a destination tenant end point located in a second virtual overlay network. The NVE may determine that a network service function is unavailable to treat the data packet between the first virtual overlay network and the second virtual overlay network. In order to route the data packet, the NVE may obtain a service chain policy that provides the location of a network node configured to treat the data packet with the network service function. The NVE may transmit the data packet toward the network node. A service chain policy may correspond to a sequence of network nodes that represents a path to the destination tenant end point.

Abstract translation: 一种基于位于网络虚拟化边缘（NVE）内的分布式网关的服务链策略来转发数据流量的方法。 NVE可以在第一虚拟覆盖网络内接收目的地为位于第二虚拟覆盖网络中的目的地租户端点的数据分组。 NVE可以确定网络服务功能不可用于处理第一虚拟覆盖网络和第二虚拟覆盖网络之间的数据分组。 为了路由数据包，NVE可以获得服务链策略，其提供被配置为使用网络服务功能处理数据分组的网络节点的位置。 NVE可以向网络节点发送数据包。 服务链策略可以对应于表示目的地租户端点的路径的网络节点序列。

公开(公告)号：US20140233569A1

公开(公告)日：2014-08-21

申请号：US14180636

申请日：2014-02-14

Applicant: Futurewei Technologies, Inc.

Inventor： Lucy Yong ,  Linda Dunbar

IPC: H04L12/715

CPC classification number: H04L45/64 ,  H04L45/04 ,  H04L45/308

Abstract: A method for distributing the inter-network forwarding policies to a distributed gateway located within a network virtualization edge (NVE). The NVE may receive a data packet within a first virtual overlay network and determine that the data packet is destined for a destination end point located within a second virtual overlay network. The NVE may validate the data packet corresponds to an inter-network forwarding policy stored within the distributed gateway and forward the data packet to the second virtual overlay network. Alternatively, the NVE may forward the data packet toward a gateway or query the corresponding policy from a controller if no corresponding inter-network forwarding policy is located on the distributed gateway. A distributed gateway may receive the forwarding policies from a designated gateway or from a centralized controller.

Abstract translation: 一种用于将网络间转发策略分发到位于网络虚拟化边缘（NVE）内的分布式网关的方法。 NVE可以在第一虚拟覆盖网络内接收数据分组，并且确定数据分组被发往位于第二虚拟覆盖网络内的目的地终点。 NVE可以验证对应于存储在分布式网关内的网络间转发策略的数据分组，并将数据分组转发到第二虚拟覆盖网络。 或者，如果在分布式网关上没有对应的网络间转发策略，NVE可以将数据分组转发到网关，或者从控制器查询相应的策略。 分布式网关可以从指定网关或集中控制器接收转发策略。

公开(公告)号：US09832031B2

公开(公告)日：2017-11-28

申请号：US14921835

申请日：2015-10-23

Applicant: Futurewei Technologies, Inc.

Inventor： Katherine Zhao ,  Lucy Yong

IPC: H04L12/18 ,  H04L12/54 ,  H04L12/761 ,  H04L12/801 ,  H04L12/721 ,  H04L12/26

CPC classification number: H04L12/1854 ,  H04L12/189 ,  H04L43/0811 ,  H04L45/16 ,  H04L45/26 ,  H04L47/15 ,  H04L47/17

Abstract: A data packet forwarding method including receiving, by a network node, a data packet that comprises a bit string, a BFIR identifier (ID), and a multicast replication path (MRP) ID, wherein the BFIR ID identifies an ingress network node for a multicast group, and wherein the MRP ID identifies the multicast group, identifying an entry in a BIER Replication Path Cache Table (BRCT) using the BFIR ID and the MRP ID, wherein the entry identifies a replication neighbor (NBR) list associated with the BFIR ID and the MRP ID, and forwarding the data packet in accordance with the replication NBR list.