公开(公告)号：US20150334085A1

公开(公告)日：2015-11-19

申请号：US14812063

申请日：2015-07-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Quancai Li ,  Bo Man

IPC: H04L29/12

CPC classification number: H04L61/2015 ,  H04L45/64

Abstract: A method and an apparatus for acquiring an Internet Protocol (IP) address by a Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol (DHCP) client. The method includes generating, by a controller, a first DHCP discover packet, forwarding, by the controller, the first DHCP discover packet to a DHCP server through a switch so that the DHCP server generates a DHCP offer packet, and sends the DHCP offer packet to the switch, receiving, by the controller, the DHCP offer packet and port information of the switch to communicate with the DHCP server, wherein the DHCP offer packet and the port are reported by the switch, acquiring address information of the DHCP server, and generating, by the controller according to the address information and the port, a forwarding rule for forwarding from the switch to the DHCP server, to assist the DHCP client in acquiring an IP address of the DHCP client.

Abstract translation: 一种用于通过动态主机配置协议（Dynamic Host Configuration Protocol，动态主机配置协议（DHCP））客户端获取因特网协议（IP）地址的方法和装置。 该方法包括由控制器产生第一DHCP发现分组，由控制器通过交换机将第一DHCP发现分组转发给DHCP服务器，使得DHCP服务器生成DHCP提供分组，并发送DHCP提供分组 由控制器接收交换机的DHCP提供报文和端口信息，与DHCP服务器进行通信，其中DHCP报文报文和端口由交换机报告，获取DHCP服务器的地址信息， 由控制器根据地址信息和端口生成从交换机转发到DHCP服务器的转发规则，以协助DHCP客户端获取DHCP客户端的IP地址。

公开(公告)号：US09736110B2

公开(公告)日：2017-08-15

申请号：US14812063

申请日：2015-07-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Quancai Li ,  Bo Man

IPC: H04L29/12 ,  H04L12/715

CPC classification number: H04L61/2015 ,  H04L45/64

Abstract: A method and an apparatus for acquiring an Internet Protocol (IP) address by a Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol (DHCP) client. The method includes generating, by a controller, a first DHCP discover packet, forwarding, by the controller, the first DHCP discover packet to a DHCP server through a switch so that the DHCP server generates a DHCP offer packet, and sends the DHCP offer packet to the switch, receiving, by the controller, the DHCP offer packet and port information of the switch to communicate with the DHCP server, wherein the DHCP offer packet and the port are reported by the switch, acquiring address information of the DHCP server, and generating, by the controller according to the address information and the port, a forwarding rule for forwarding from the switch to the DHCP server, to assist the DHCP client in acquiring an IP address of the DHCP client.

公开(公告)号：US09998293B2

公开(公告)日：2018-06-12

申请号：US15335620

申请日：2016-10-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chenji Li ,  Quancai Li ,  Bo Man

IPC: H04L12/18 ,  H04L12/851 ,  H04L12/931 ,  H04L29/12 ,  H04L12/24

CPC classification number: H04L12/185 ,  H04L12/18 ,  H04L41/0816 ,  H04L41/5051 ,  H04L47/2483 ,  H04L49/201 ,  H04L61/2069

Abstract: A method and a device for maintaining a multicast group member are disclosed. The method includes sending a query message to a switch at intervals of a preset period, so that the switch sends the query message to each multicast group member included in a multicast group; acquiring a count value of current period query responses received by the switch in a current period; and maintaining, according to the count value of current period query responses and a count value of previous period query responses, the multicast group member included in the multicast group. The device includes a first sending module, an acquiring module, and a maintenance module. In the present disclosure, a multicast group member is maintained using a flow table maintained in a switch, which decreases load of a controller, and improves processing efficiency of maintaining, by the controller, the multicast group member.

公开(公告)号：US20160301607A1

公开(公告)日：2016-10-13

申请号：US15189828

申请日：2016-06-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo Man ,  Chenji Li

IPC: H04L12/741 ,  H04L12/721

CPC classification number: H04L45/745 ,  H04L45/38 ,  H04L45/42

Abstract: A routing control method in software defined networking and an OpenFlow controller are provided. The method includes: receiving, by an OFC, a data packet reported by an OFS; determining, by the OFC according to a key value stored in a cache, whether the data packet is a repeated packet; and if the data packet is a repeated packet, delivering, by the OFC, the data packet to the OFS, and instructing the OFS to match a stored flow table to process the data packet or transmit the data packet through a corresponding port; or if the data packet is not a repeated packet, calculating, by the OFC, a routing policy for the data packet, and delivering a flow entry to the OFS according to the routing policy. In this way, for repeated packets, the OFC may calculate a routing policy only once, thereby reducing a calculation amount of the OFC.

Abstract translation: 提供了软件定义网络中的路由控制方法和OpenFlow控制器。 该方法包括：通过OFC接收OFS报告的数据包; 由OFC根据存储在高速缓存中的键值确定数据分组是否是重复分组; 并且如果数据分组是重复分组，则由OFC将数据分组传送给OFS，并指示OFS匹配存储的流表以处理数据分组或通过对应的端口发送数据分组; 或者如果数据分组不是重复分组，则由OFC计算数据分组的路由策略，并根据路由策略向OFS传递流分类。 以这种方式，对于重复的分组，OFC可以仅计算一次路由策略，从而减少OFC的计算量。

公开(公告)号：US10757021B2

公开(公告)日：2020-08-25

申请号：US16273784

申请日：2019-02-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo Man ,  Chenji Li

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/717

Abstract: A routing control method in software defined networking and an OpenFlow controller are provided. The method includes: receiving, by an OFC, a data packet reported by an OFS; determining, by the OFC according to a key value stored in a cache, whether the data packet is a repeated packet; and if the data packet is a repeated packet, delivering, by the OFC, the data packet to the OFS, and instructing the OFS to match a stored flow table to process the data packet or transmit the data packet through a corresponding port; or if the data packet is not a repeated packet, calculating, by the OFC, a routing policy for the data packet, and delivering a flow entry to the OFS according to the routing policy. In this way, for repeated packets, the OFC may calculate a routing policy only once, thereby reducing a calculation amount of the OFC.

公开(公告)号：US10237181B2

公开(公告)日：2019-03-19

申请号：US15189828

申请日：2016-06-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo Man ,  Chenji Li

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/717

Abstract: A routing control method in software defined networking and an OpenFlow controller are provided. The method includes: receiving, by an OFC, a data packet reported by an OFS; determining, by the OFC according to a key value stored in a cache, whether the data packet is a repeated packet; and if the data packet is a repeated packet, delivering, by the OFC, the data packet to the OFS, and instructing the OFS to match a stored flow table to process the data packet or transmit the data packet through a corresponding port; or if the data packet is not a repeated packet, calculating, by the OFC, a routing policy for the data packet, and delivering a flow entry to the OFS according to the routing policy. In this way, for repeated packets, the OFC may calculate a routing policy only once, thereby reducing a calculation amount of the OFC.

公开(公告)号：US20170048076A1

公开(公告)日：2017-02-16

申请号：US15335620

申请日：2016-10-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chenji Li ,  Quancai Li ,  Bo Man

IPC: H04L12/18 ,  H04L29/12 ,  H04L12/851 ,  H04L12/931

CPC classification number: H04L12/185 ,  H04L12/18 ,  H04L41/0816 ,  H04L41/5051 ,  H04L47/2483 ,  H04L49/201 ,  H04L61/2069

Abstract: A method and a device for maintaining a multicast group member are disclosed. The method includes sending a query message to a switch at intervals of a preset period, so that the switch sends the query message to each multicast group member included in a multicast group; acquiring a count value of current period query responses received by the switch in a current period; and maintaining, according to the count value of current period query responses and a count value of previous period query responses, the multicast group member included in the multicast group. The device includes a first sending module, an acquiring module, and a maintenance module. In the present disclosure, a multicast group member is maintained using a flow table maintained in a switch, which decreases load of a controller, and improves processing efficiency of maintaining, by the controller, the multicast group member.

Abstract translation: 公开了一种维护组播组成员的方法和设备。 该方法包括以预设周期的间隔向交换机发送查询消息，使得交换机向多播组中包括的每个组播组成员发送查询消息; 获取当前周期中由交换机接收的当前周期查询响应的计数值; 根据当前周期查询响应的计数值和前一周期查询响应的计数值，维护组播组中包含的组播组成员。 该设备包括第一发送模块，采集模块和维护模块。 在本公开中，使用维护在交换机中的流表来维护组播组成员，从而降低控制器的负担，提高了控制器维护组播组成员的处理效率。