WO2020220459A1 - 基于VXLAN和OpenFlow的虚拟家庭网络共享方法及系统 - Google Patents

基于VXLAN和OpenFlow的虚拟家庭网络共享方法及系统 Download PDF

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WO2020220459A1
WO2020220459A1 PCT/CN2019/094124 CN2019094124W WO2020220459A1 WO 2020220459 A1 WO2020220459 A1 WO 2020220459A1 CN 2019094124 W CN2019094124 W CN 2019094124W WO 2020220459 A1 WO2020220459 A1 WO 2020220459A1
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vxlan
address
vtep
virtual
modify
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French (fr)
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喻晶洁
何奥林
姚洁
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Fiberhome Telecommunication Technologies Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks

Definitions

  • the present invention relates to the field of data message forwarding, in particular to a virtual home network sharing method and system based on VXLAN (Virtual Extensible LAN) and OpenFlow (communication protocol).
  • VXLAN Virtual Extensible LAN
  • OpenFlow communication protocol
  • the virtual home gateway is divided into two parts, the vG (virtual gateway) end placed in the data center server and the pG (physical gateway) placed in the user's home, between the vG end and the pG end of the virtual home Use VXLAN to connect.
  • the vG end is equivalent to the server side
  • the pG end is equivalent to the user side.
  • VLANs Virtual Local Area Network, virtual local area network
  • the overlay method is generally used to isolate families.
  • the Overlay approach there is currently no effective solution to how families can share access to data center server-side resources.
  • the invention discloses a virtual home network sharing method and system based on VXLAN and OpenFlow, which can enable data message transmission between virtual homes and realize resource sharing.
  • a virtual home network sharing method based on VXLAN and OpenFlow includes the following steps:
  • the vG end multicasts its own resources to the device connected to the pG end through multicast;
  • the device attached to the pG end informs the vG end of its required resources through unicast;
  • the vG end sends the resources required by the device connected to the pG end through unicast.
  • the vG end Before the vG end multicasts its own resources to all pG end-linked devices in a multicast manner, it specifically includes:
  • the pG end-linked device Before the pG end-linked device notifies the vG end of its required resources through unicast, it specifically includes:
  • IP mapping is performed in the virtual switch on the pG end, and the OpenFlow flow table is issued to map the source IP address of the packet sent by the device at the pG end to the vG end to the unused second IP address;
  • the mac address of the vG end corresponds to the vG end VTEP endpoint.
  • the vG end before the vG end sends the resources required by the pG end-linked device through unicast, it further includes:
  • the mac address of the device connected to the pG end corresponds to the VTEP end point of the pG end.
  • a virtual home network sharing system based on VXLAN and OpenFlow provided by the present invention includes:
  • the first creation module which is used to create a VXLAN connection and connect the vG end and the pG end of the virtual home gateway;
  • the second creation module is used to create a new VXLAN connection between virtual homes and modify the VXLAN FDB table of the newly created VXLAN connection to make the second-tier network between the virtual homes reachable;
  • Multicast module which is used to drive the vG end to broadcast its own resources to the pG end-linked device through multicast;
  • the first unicast module which is used to drive the device connected to the pG end to inform the vG end of the resources it needs by unicasting;
  • the second unicast module is used to drive the vG end to send the resources required by the device connected to the pG end in a unicast manner.
  • the vG end Before the vG end broadcasts its own resources in a multicast manner, it specifically includes:
  • the pG end-linked device Before the pG end-linked device notifies the vG end of its required resources through unicast, it specifically includes:
  • the mac address of the vG end corresponds to the vG end VTEP endpoint.
  • the vG end before the vG end sends the resources required by the pG end-linked device through unicast, it further includes:
  • the mac address of the device connected to the pG end corresponds to the VTEP end point of the pG end.
  • the present invention has the advantage of creating a new VXLAN connection between virtual homes and modifying the VXLAN FDB table of the newly created VXLAN connection, so that the second layer network between the virtual homes can be reached, so that the vG of a virtual home
  • the terminal can communicate with devices connected to the pG end of other virtual homes, and other virtual homes can obtain resources on the vG end of the virtual home, and the vG end and the pG end of each virtual home can transmit data messages to realize resource sharing.
  • Figure 1 is a flowchart of a method for virtual home network sharing based on VXLAN and OpenFlow in an embodiment of the present invention
  • Figure 2 is a schematic diagram of the process of a multicast message sent from the vG end to the pG end in an example of the present invention
  • FIG. 3 is a schematic diagram of the process in which the device attached to the pG end in the example of the present invention responds to a message in a unicast manner to inform the vG end of its required resources;
  • Fig. 4 shows that the vG end transmits resources to the pG end-linked device through unicast in the example of the present invention
  • Figure 5 shows the FDB table format saved in the VXLAN endpoint VTEP in the example of the present invention.
  • the present invention will be further described in detail below in conjunction with the drawings and embodiments. Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the embodiment of the present invention provides a virtual home network sharing method based on VXLAN and OpenFlow.
  • VXLAN virtual local area network
  • OpenFlow virtual network sharing method
  • an embodiment of a method for sharing a virtual home network based on VXLAN and OpenFlow provided by an embodiment of the present invention includes:
  • S1 Create a VXLAN connection to connect the vG end and pG end of the virtual home;
  • the pG terminal corresponds to the access device on the user side in the virtual home, and is used to access terminal devices such as mobile phones and computers in the home. It can be understood that each pG corresponds to a virtual home vG.
  • the vG end and the pG end of each virtual home are connected by VXLAN, and the vG end and the pG end use a virtual switch that supports the OpenFlow protocol.
  • S2 Create a new VXLAN connection between the virtual homes, and modify the VXLAN FDB table of the newly created VXLAN connection to make the second-tier network between the virtual homes reachable;
  • VXLAN connection VXLAN FDB table between the virtual homes
  • data between the virtual homes can be communicated, that is, data packet transmission can be performed between the vG end and the pG end of each virtual home.
  • virtual home A and virtual home B create a new VXLAN between virtual home A and virtual home B Connect, and then modify the VXLAN connection VXLAN FDB table between virtual home A and virtual home B, so that the second layer link is reachable between virtual home A and virtual home B, and the data is interoperable.
  • Virtual home A can obtain resources from the vG end of virtual home B
  • the virtual home B can also obtain the resources of the vG end of the virtual home A.
  • FDB (Forwarding Data Base) table that is, MAC address forwarding table.
  • S4 The devices connected to the pG end (computers, mobile phones, etc.) inform the vG end of its own resources through unicast;
  • the vG end sends the resources required by the device connected to the pG end through unicast.
  • the vG-side when vG-side resource sharing between virtual homes is performed, the vG-side informs the pG-side connected device of the resources provided by itself through multicast, and the pG-side downlink device informs the resource provided by the vG-side
  • the resources required by the vG end itself, and the vG end transmits the resources to the devices connected to the pG end through unicast.
  • a method for sharing a virtual home network based on VXLAN and OpenFlow in an embodiment of the present invention is to create a VXLAN connection between virtual homes and modify the VXLAN FDB table of the newly created VXLAN connection to make the second-tier network between the virtual homes reachable, so that a certain
  • the vG end of a virtual home can send multicast packets to other virtual home pG end-linked devices, and other virtual home pG end-linked devices can obtain resources of the virtual home vG end.
  • Between the vG end and the pG end of each virtual home It can carry out data message transmission and realize resource sharing.
  • the specific steps include: modifying the FDB table of the newly created VXLAN connection VTEP end at the vG end so that the multicast packets on the vG end can reach the pG end; Modify the OpenFlow flow table on the vG side so that the source IP address of the vG side is an unused IP address, that is, an unused IP address before, to avoid conflicts with existing IP addresses.
  • VTEP namely VXLAN Tunnel End Point, is responsible for VXLAN encapsulation and decapsulation of original Ethernet packets.
  • the specific steps include: modifying the FDB table of the VXLAN connection on the pG end to the VTEP end, so that the unicast packets of the device linked to the pG end can reach the vG end; modifying the pG end OpenFlow flow table, so that the source IP address of the packet sent by the device attached to the pG to the vG end is an unused IP address, that is, an unused IP address before, so as to avoid conflicts with existing IP addresses.
  • the embodiment of the present invention provides a VXLAN and OpenFlow-based virtual home network sharing method in the first embodiment.
  • modifying the FDB table of the VXLAN connection on the vG side to the VTEP side and modifying the OpenFlow flow table on the vG side includes:
  • the mac address of the vG end corresponds to the vG end VTEP endpoint.
  • the embodiment of the present invention provides a VXLAN and OpenFlow-based virtual home network sharing method in the first
  • the vG side before the vG side sends the resources required by the pG-connected device in unicast mode, it further includes:
  • the mac address of the device connected to the pG end corresponds to the VTEP end point of the pG end.
  • the following uses an example to inform the vG end of the embodiment of the present invention of the resources provided by other pG offline devices through multicast.
  • the pG offline device learns the resources provided by the vG end and informs the vG end of the resources it needs.
  • the resource is transmitted to the device connected to the pG end in a unicast mode, and the above process is described in detail.
  • the vG end is equivalent to the server side of the virtual home gateway
  • the pG end is equivalent to the user side of the virtual home gateway.
  • a vSwitch is deployed in vG and pG, and accepts the control of the controller through the OpenFlow protocol, so that the quintuple information of the data message can be modified.
  • NC Network Card
  • the VXLAN tunnel endpoint is vtep.
  • the agent (pG2Agent is omitted and not shown in Figure 2) accepts the management of the controller to configure the VXLAN FDB table of vtep.
  • the multicast packet sent from the vG end to the pG end has the following processing logic:
  • VXLAN source endpoint (vG side) is vtep1, source IP address is ip1, source mac address is mac1;
  • VXLAN destination endpoint (pG side) is vtep2, destination IP address is multicast address ip_multi, destination mac address is multicast mac address mac_multi .
  • IP mapping is performed in the virtual switch on the vG side, and the source IP address ip1 is mapped to ip1_new by issuing the OpenFlow flow table (this address is a reserved address and will not cause address conflicts between different families), and the VXLAN FDB table on the vG side is modified at the same time , Corresponding to mac_multi as VXLAN endpoint vtep2;
  • the source MAC address is mac1
  • the source IP address is ip1_new
  • the destination MAC address is mac_multi
  • the destination IP address is ip_multi.
  • the pG-side attached device informs the vG side of the resources it needs after learning the resources provided by the vG side.
  • the pG-side attached device replies with a unicast message to inform the vG side of the resources it needs.
  • the logic is as follows:
  • the VXLAN endpoint of the vG end is vtep1, the IP address of the vG end is ip1, and the mac address of the server is mac1;
  • the VXLAN endpoint of pG is vtep2, the IP address of the device attached to the pG end is ip2, and the mac address of the device attached to the pG end is mac2. Since the source IP address of the multicast message received by the pG end is ip1_new, the destination IP address of the reply message is ip1_new, and the source IP address is ip2;
  • IP mapping is performed in the virtual switch on the pG side, and the OpenFlow flow table is issued through the controller to map the source IP address ip2 to ip2_new (this address is a reserved address and will not cause address conflicts between different families), and modify the virtual switch
  • the ARP table is ip1_new corresponding to mac1, modify the FDB table in the VXLAN endpoint where the pG end is located, and match mac1 to the VXLAN endpoint vtep1;
  • the source MAC address is mac2
  • the source IP address is ip2_new
  • the destination mac address is mac1
  • the destination IP address is ip1_new.
  • the OpenFlow flow table in the vG side is modified to do IP mapping. Change the destination IP address ip1_new of the message to ip1, and then forward the message to the vG end for internal processing.
  • the vG end transmits resources to the pG end through unicast, and the logic is as follows:
  • the VXLAN endpoint of the vG end is vtep1, the IP address of the vG end is ip1, and the mac address of the vG end is mac1;
  • the VXLAN endpoint of the pG end is vtep2, the IP address of the device at the pG end is ip2, and the mac address of the device at the pG end is mac2;
  • the source mac address of the data message sent by the vG end is mac1, the source IP address is ip1, the destination mac address is mac2, and the destination IP address is ip2_new.
  • IP mapping is done in the virtual switch on the vG side, the source IP address is mapped to ip1_new by issuing the OpenFlow flow table, the ARP table in the virtual switch on the vG side is modified so that ip2_new corresponds to mac2, and the FDB table of the VXLAN on the vG side is modified to mac2 Corresponding to vtep2;
  • the packet decapsulated by the VXLAN interface vtep2 on the pG side has the source mac address as mac1, the source IP address as ip1_new, the destination mac address as mac2, and the destination IP address as ip2_new.
  • IP mapping is done in the virtual switch where the pG end is located, the destination IP address ip2_new is mapped to ip2 by issuing the OpenFlow flow table, and the ARP table is modified to ip1_new corresponding to mac1, and the source mac address of the packet received by the device connected to the pG end Is mac1, the source IP address is ip1_new, the destination mac address is mac2, and the destination IP address is ip2.
  • an Agent needs to be deployed for receiving instructions from the controller to issue configuration.
  • the Controller connects to the Agent through the Netconf protocol, and uses the following configuration to change the FDB table of the vtep on the server side and the device side.
  • the Controller mainly provides the north-south API interface, the southbound interface is responsible for communicating and calling with basic network equipment, and the northbound interface is responsible for communicating and calling with upper-layer applications. At the same time, the controller will provide a web management platform. All SDN network functions are deployed and invoked on this interface. The independence, ease of use, and scalability between network functions are key indicators for measuring SDN Controller.
  • the Agent receives instructions from the Controller and configures the FDB table of the VTEP.
  • the format of the VXLAN FDB table is shown in Figure 5.
  • the endpoint of the VXLAN tunnel is called a VTEP, and a forwarding data table can be configured in the VTEP. It can decide to encapsulate the data packet in a VXLAN message and send it to the next hop VTEP according to the destination MAC address of the inner message. If it is a unicast MAC, the agent only needs to configure the remote vtep corresponding to the MAC address.
  • the vtep information includes IP, VNI (VXLAN Network Identifier, virtual extensible local area network identifier) and port information. If it is a multicast MAC, the agent needs to configure the remote vtep linked list corresponding to the MAC address.
  • the destination MAC address of the inner layer message is a unicast MAC address
  • the IP address, VNI number, and port number of the terminal As shown in Figure 5(b), if the destination MAC address of the inner message is a multicast MAC address, it means that the message needs to be sent to multiple vtep ends, so the IP addresses and VNI numbers of multiple vtep ends need to be recorded And the port number, and store it in the form of a linked list.
  • the first creation module which is used to create a VXLAN connection and connect the vG end and the pG end of the virtual home gateway;
  • the second creation module is used to create a new VXLAN connection between virtual homes and modify the VXLAN FDB table of the newly created VXLAN connection to make the second-tier network between the virtual homes reachable;
  • Multicast module which is used to drive the vG end to broadcast its own resources to the pG end-linked device through multicast;
  • the first unicast module which is used to drive the device connected to the pG end to inform the vG end of the resources it needs by unicasting;
  • the second unicast module is used to drive the vG end to send the resources required by the device connected to the pG end in a unicast manner.
  • the vG end Before the vG end broadcasts its own resources through multicast, it specifically includes:
  • the device connected to the pG end informs the vG end of its required resources through unicast, it specifically includes:
  • the first optional implementation of a virtual home network sharing system based on VXLAN and OpenFlow provided in the embodiment of the present invention
  • modify the FDB table of the newly created VXLAN connection VTEP side on the vG side, and modify the OpenFlow flow table on the vG side including:
  • IP mapping is performed in the virtual switch on the pG end, and the OpenFlow flow table is issued to map the source IP address of the packet sent by the device at the pG end to the vG end to the unused second IP address;
  • the vG end Before the vG end sends the resources required by the device connected to the pG end through unicast, it also includes:
  • the mac address of the device connected to the pG end corresponds to the VTEP end point of the pG end.

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Abstract

本发明公开了一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法及系统,涉及数据报文转发领域,该方法包括创建VXLAN连接,连接虚拟家庭的vG端和pG端;虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;vG端通过组播方式向pG端下挂设备组播自身所含资源;pG端下挂设备通过单播方式告知vG端自身所需资源;vG端通过单播方式发送pG端下挂设备所需资源。本发明能够使各虚拟家庭间进行数据报文传输,实现资源共享。

Description

基于VXLAN和OpenFlow的虚拟家庭网络共享方法及系统 技术领域
本发明涉及数据报文转发领域,具体涉及一种基于VXLAN(Virtual Extensible LAN,虚拟扩展局域网)和OpenFlow(通信协议)的虚拟家庭网络共享方法及系统。
背景技术
虚拟家庭网关分为两个部分,放置于数据中心服务器中的vG(virtual Gateway,虚拟网关)端和放置于用户家中的pG(physical Gateway,物理网关),虚拟家庭的vG端和pG端之间采用VXLAN进行连接。vG端相当于服务器侧,pG端相当于用户侧。
对于虚拟家庭网关,传统网络隔离主要采用VLAN(Virtual Local Area Network,虚拟局域网)进行,而由于数据中心中家庭网关数量庞大,现如今一般采用Overlay的方式进行家庭之间的隔离。但是采用Overlay的方式,家庭间如何实现对于数据中心服务器端资源的共享访问,目前并没有有效的解决方式。
发明内容
本发明公开一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法及系统,能够使各虚拟家庭间进行数据报文传输,实现资源共享。
本发明提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,包括以下步骤:
创建VXLAN连接,连接虚拟家庭的vG端和pG端;
虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
vG端通过组播方式向pG端下挂设备组播自身所含资源;
pG端下挂设备通过单播方式告知vG端自身所需资源;
vG端通过单播方式发送pG端下挂设备所需资源。
在上述方案的基础上,
所述vG端通过组播方式向所有pG端下挂设备组播自身所含资源之前,具体包括:
修改vG端VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;
修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用IP地址;
所述pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:
修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;
修改pG端的OpenFlow流表,以使pG端下挂设备发往vG端的报文的源IP地址为未被使用IP地址。
在上述方案的基础上,修改vG端VXLAN连接VTEP端的FDB表,修改vG端的OpenFlow流表,具体包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
在上述方案的基础上,修改pG端VXLAN连接VTEP端的FDB 表,修改pG端的OpenFlow流表,具体包括:
pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将pG端下挂设备发往vG端报文的源IP地址映射为未被使用的第二IP地址;
修改pG端虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VTEP端点。
在上述方案的基础上,所述vG端通过单播方式发送pG端下挂设备所需资源之前,还包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备的mac地址对应为pG端VTEP端点。
本发明提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统,包括:
第一创建模块,其用于创建VXLAN连接,连接虚拟家庭网关的vG端和pG端;
第二创建模块,其用于在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
组播模块,其用于驱使vG端通过组播方式向pG端下挂设备广播自身所含资源;
第一单播模块,其用于驱使pG端下挂设备通过单播方式告知vG端自身所需资源;
第二单播模块,其用于驱使vG端通过单播方式发送pG端下挂设备所需资源。
在上述方案的基础上,
所述vG端通过组播方式广播自身所含资源之前,具体包括:
修改vG端新建VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;
修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用IP地址;
所述pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:
修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;
修改pG端的OpenFlow流表,以使pG端下挂设备发往vG端的报文的源IP地址为未被使用IP地址。
在上述方案的基础上,修改vG端新建VXLAN连接VTEP端的FDB表,修改vG端的OpenFlow流表,具体包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
在上述方案的基础上,修改pG端VXLAN连接VTEP端的FDB表,修改pG端的OpenFlow流表,具体包括:
pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表, 将pG端下挂设备发往vG端报文的源IP地址映射为未被使用的第二IP地址;
修改pG端虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VTEP端点。
在上述方案的基础上,所述vG端通过单播方式发送pG端下挂设备所需资源之前,还包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备的mac地址对应为pG端VTEP端点。
与现有技术相比,本发明的优点在于:通过在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达,使得某个虚拟家庭的vG端能够对其它虚拟家庭pG端下挂设备进行通信,且其它虚拟家庭能够获取该虚拟家庭vG端的资源,各虚拟家庭的vG端和pG端间能够进行数据报文传输,实现资源共享。
附图说明
图1为本发明实施例中一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法的流程图;
图2为本发明实例中vG端发往pG端的组播报文的过程示意图;
图3为本发明实例中pG端下挂设备通过单播方式回复报文告知 vG端自身所需资源的过程示意图;
图4为本发明实例中vG端通过单播方式向pG端下挂设备传送资源;
图5为本发明实例中VXLAN端点VTEP中所保存的FDB表格式。
具体实施方式
以下结合附图及实施例对本发明作进一步详细说明。本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明实施例提供一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,通过在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达,使得某个虚拟家庭的vG端能够对其它虚拟家庭pG端下挂进行通信,且其它虚拟家庭能够获取该虚拟家庭vG端的资源,实现资源共享。本发明实施例还相应的提供了一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统。
参见图1所示,本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法的一实施例包括:
S1:创建VXLAN连接,连接虚拟家庭的vG端和pG端;
本发明实施例中,pG端对应虚拟家庭中位于用户侧的接入设备,用以接入家庭中的手机、电脑等终端设备,可以理解,每个pG对应 一个虚拟家庭vG。每个虚拟家庭的vG端和pG端间均采用VXLAN进行连接,且vG端和pG端内部采用支持OpenFlow协议的虚拟交换机。
S2:虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
本发明实施例中,通过修改虚拟家庭间VXLAN连接VXLAN FDB表,使得虚拟家庭间数据能够互通,即各个虚拟家庭的vG端和pG端间能够进行数据包传输。
在实际应用过程中,虚拟家庭数量为多个,但某个时刻需要进行数据共享的虚拟家庭可能只有2个,例如虚拟家庭A和虚拟家庭B,则在虚拟家庭A和虚拟家庭B间新建VXLAN连接,然后修改虚拟家庭A和虚拟家庭B间VXLAN连接VXLAN FDB表,从而虚拟家庭A和虚拟家庭B间实现二层链路可达,数据互通,虚拟家庭A可获取虚拟家庭B的vG端的资源,同理,虚拟家庭B也可获取虚拟家庭A的vG端的资源。FDB(Forwarding Data Base)表,即MAC地址转发表。
S3:vG端通过组播方式向pG端广播自身所含资源;
S4:pG端下挂设备(电脑、手机等)通过单播方式告知vG端自身所需资源;
S5:vG端通过单播方式发送pG端下挂设备所需资源。
本发明实施例中,在进行虚拟家庭间的vG端资源共享时,vG端通过组播方式告知pG端下挂设备自己所提供的资源,pG端下挂设备获知vG端所提供的资源后告知vG端自身所需资源,vG端通过单播方式向pG端下挂设备传送资源。
本发明实施例的一种基于VXLAN和OpenFlow的虚拟家庭网络 共享方法,通过在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达,使得某个虚拟家庭的vG端能够对其它虚拟家庭pG端下挂设备发送组播报文,且其它虚拟家庭pG端下挂设备能够获取该虚拟家庭vG端的资源,各虚拟家庭的vG端和pG端间能够进行数据报文传输,实现资源共享。
可选地,在上述一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法对应实施例的基础上,本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法的第一个可选实施例中,vG端通过组播方式向所有pG端下挂设备组播自身所含资源之前,具体包括:修改vG端新建VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用的IP地址,即之前未被使用的IP地址,避免与已有IP地址造成冲突。VTEP,即VXLAN Tunnel End Point,负责原始以太报文的VXLAN封装和解封装。
pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;修改pG端的OpenFlow流表,以使pG下挂设备发往vG端的报文的源IP地址为未被使用IP地址,即之前未被使用的IP地址,避免与已有IP地址造成冲突。
可选地,在上述一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法对应第一个可选实施例的基础上,本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法的第二个可选实施例中,修改vG端VXLAN连接VTEP端的FDB表,修改vG端的OpenFlow流表,具体包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
修改pG端VXLAN连接VTEP端的FDB表,修改pG端的OpenFlow流表,具体包括:
pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将pG端下挂设备发往发往vG端报文的IP地址映射为未被使用的第二IP地址;
修改pG虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VTEP端点。
可选地,在上述一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法对应第二个可选实施例的基础上,本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法的第三个可选实施例中,vG端通过单播方式发送pG下挂设备所需资源之前,还包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备的mac地址对应为pG端VTEP端点。
以下结合一实例来对本发明实施例中vG端通过组播方式告知其 他pG下挂设备自己所提供的资源,pG下挂设备获知vG端所提供的资源后告知vG端自身所需资源,vG端通过单播方式向pG端下挂设备传送资源,上述流程进行具体说明。
参见图2所示,vG端相当于虚拟家庭网关的服务器侧,pG端相当于为虚拟家庭网关的用户侧。vG和pG中部署有vSwitch,通过OpenFlow协议接受控制器Controller的控制,从而能够修改数据报文的五元组信息等。NC(Network Card)代表网卡,VXLAN隧道端点为vtep。代理Agent(图2中pG2Agent省略未画出)接受控制器Controller的管理对vtep的VXLAN FDB表进行配置。vG端通过组播方式告知其他pG端下挂设备自己所提供的资源流程中,vG端发往pG端的组播报文,处理逻辑如下:
VXLAN源端点(vG端)为vtep1,源IP地址为ip1,源mac地址为mac1;VXLAN目的端点(pG端)为vtep2,目的IP地址为组播地址ip_multi,目的mac地址为组播mac地址mac_multi。
vG端虚拟交换机中做IP映射,通过下发OpenFlow流表,将源IP地址ip1映射为ip1_new(该地址为预留地址,不会造成不同家庭间的地址冲突),同时修改vG端VXLAN FDB表,将mac_multi对应为VXLAN端点vtep2;
pG端接收到的组播报文,源MAC地址为mac1,源IP地址为ip1_new,目的MAC地址为mac_multi,目的IP地址为ip_multi。
参见图3所示,pG端下挂设备获知vG端所提供的资源后告知vG端自身所需资源流程中,pG端下挂设备通过单播方式回复报文告知vG端自身所需资源,处理逻辑如下:
vG端所在VXLAN端点为vtep1,vG端IP地址为ip1,服务器mac地址为mac1;pG所在VXLAN端点为vtep2,pG端下挂设备IP 地址为ip2,pG端下挂设备mac地址为mac2。由于pG端收到的组播报文的源IP地址为ip1_new,因此回复报文的目的IP地址为ip1_new,源IP地址为ip2;
pG端的虚拟交换机中进行IP映射,通过控制器下发OpenFlow流表,将源IP地址ip2映射为ip2_new(该地址为预留地址,不会造成不同家庭间的地址冲突),修改虚拟交换机中的ARP表为ip1_new对应mac1,修改pG端所在VXLAN端点中FDB表,将mac1对应VXLAN端点vtep1;
vG端VXLAN接口vtep1接收到的包解封装后,源MAC地址为mac2,源IP地址为ip2_new,目的mac地址为mac1,目的IP地址为ip1_new,通过修改vG端中的OpenFlow流表做IP映射,将该报文的目的IP地址ip1_new更换为ip1,然后将该报文转发给vG端内部处理。
参见图4所示,vG端通过单播方式向pG端传送资源,逻辑如下:
vG端所在VXLAN端点为vtep1,vG端IP地址为ip1,vG端mac地址为mac1;pG端VXLAN端点为vtep2,pG端下挂设备IP地址为ip2,pG端下挂设备mac地址为mac2;
vG端发出的数据报文源mac地址为mac1,源IP地址为ip1,目的mac地址为mac2,目的IP地址为ip2_new。vG端中的虚拟交换机中做IP映射,通过下发OpenFlow流表,将源IP地址映射为ip1_new,vG端的虚拟交换机中的ARP表修改,使ip2_new对应mac2,修改vG端VXLAN的FDB表为mac2对应vtep2;
pG端VXLAN接口vtep2解封装后的报文,源mac地址为mac1,源IP地址为ip1_new,目的mac地址为mac2,目的IP地址为ip2_new。 pG端所在的虚拟交换机中做IP映射,通过下发OpenFlow流表,将目的IP地址ip2_new映射为ip2,同时修改ARP表为ip1_new对应mac1,pG端下挂设备所收到的报文源mac地址为mac1,源IP地址为ip1_new,目的mac地址为mac2,目的IP地址为ip2。
本发明实施例中,在虚拟家庭网关的服务器侧和用户侧中,需要部署有Agent,用于接受控制器的指令下发配置。控制器Controller通过Netconf协议连接该Agent,用以下发配置,更改服务器侧和设备侧vtep的FDB表。
控制器(Controller)主要提供南北向的API接口,南向接口负责和基础网络设备通信、调用,北向接口负责和上层应用通信、调用。同时,控制器会提供Web管理平台,所有SDN网络功能均在这个界面上进行部署、调用,网络功能之间的独立性、易用性、可扩展性是衡量SDN Controller的关键指标。
为各个Agent分配所未使用的IP资源,通过Netconf等协议向Agent下发配置,用以修改VTEP端的VXLAN FDB表。修改vSwitch的转发规则,如果采用支持OpenFlow协议的虚拟交换机,则通过OpenFlow协议下发流表,用以更改数据报文的IP地址。
配置代理Agent需要维护VXLAN转发数据表。Agent接收Controller的指令,对VTEP的FDB表进行配置。
VXLAN FDB表格式如图5所示。VXLAN隧道的端点叫做VTEP,VTEP中可以配置转发数据表,其可以根据内层报文的目的MAC地址决定将数据包封装在VXLAN报文中送往下一跳VTEP。如果是单播MAC,Agent只需配置该MAC地址所对应的远端vtep,vtep的信息包含IP、VNI(VXLAN Network Identifier,虚拟可扩展局域网网络标识符)和port(端口)信息。如果是组播MAC,Agent 需要配置该MAC地址所对应的远端vtep链表。如图5(a)所示,如果内层报文的目的MAC地址是单播MAC地址,则意味着该报文只需发往一个vtep端,因此只需记录该单播MAC地址所对应vtep端的IP地址、VNI号以及端口port号。如图5(b)所示,如果内层报文的目的MAC地址是组播MAC地址,则意味着该报文需要发往多个vtep端,因此需要记录多个vtep端的IP地址、VNI号以及端口port号,并以链表的形式进行存储。
本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统的一实施例包括:
第一创建模块,其用于创建VXLAN连接,连接虚拟家庭网关的vG端和pG端;
第二创建模块,其用于在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
组播模块,其用于驱使vG端通过组播方式向pG端下挂设备广播自身所含资源;
第一单播模块,其用于驱使pG端下挂设备通过单播方式告知vG端自身所需资源;
第二单播模块,其用于驱使vG端通过单播方式发送pG端下挂设备所需资源。
vG端通过组播方式广播自身所含资源之前,具体包括:
修改vG端新建VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;
修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用IP地址;
pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:
修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;
修改pG端的OpenFlow流表,以使pG端下挂设备发往vG端的报文的源IP地址为未被使用IP地址。
可选地,在上述一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统对应实施例的基础上,本发明实施例提供的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统的第一个可选实施例中,修改vG端新建VXLAN连接VTEP端的FDB表,修改vG端的OpenFlow流表,具体包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
修改pG端VXLAN连接VTEP端的FDB表,修改pG端的OpenFlow流表,具体包括:
pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将pG端下挂设备发往vG端报文的源IP地址映射为未被使用的第二IP地址;
修改pG端虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VXLAN端点。
vG端通过单播方式发送pG端下挂设备所需资源之前,还包括:
vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备的mac地址对应为pG端VTEP端点。
本发明是参照根据本发明实施例的方法、设备(系统)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
本发明不局限于上述实施方式,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也视为本发明的保护范围之内。本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。

Claims (10)

  1. 一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,其特征在于,包括以下步骤:
    创建VXLAN连接,连接虚拟家庭的vG端和pG端;
    虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
    vG端通过组播方式向pG端下挂设备组播自身所含资源;
    pG端下挂设备通过单播方式告知vG端自身所需资源;
    vG端通过单播方式发送pG端下挂设备所需资源。
  2. 如权利要求1所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,其特征在于,
    所述vG端通过组播方式向所有pG端下挂设备组播自身所含资源之前,具体包括:
    修改vG端VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;
    修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用IP地址;
    所述pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:
    修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;
    修改pG端的OpenFlow流表,以使pG端下挂设备发往vG端的报文的源IP地址为未被使用IP地址。
  3. 如权利要求2所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,其特征在于,修改vG端VXLAN连接VTEP端 的FDB表,修改vG端的OpenFlow流表,具体包括:
    vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
    修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
  4. 如权利要求3所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,其特征在于,修改pG端VXLAN连接VTEP端的FDB表,修改pG端的OpenFlow流表,具体包括:
    pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将pG端下挂设备发往vG端报文的源IP地址映射为未被使用的第二IP地址;
    修改pG端虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
    将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VTEP端点。
  5. 如权利要求4所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享方法,其特征在于,所述vG端通过单播方式发送pG端下挂设备所需资源之前,还包括:
    vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
    修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
    将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备的mac地址对应为pG端VTEP端点。
  6. 一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统, 其特征在于,包括:
    第一创建模块,其用于创建VXLAN连接,连接虚拟家庭网关的vG端和pG端;
    第二创建模块,其用于在虚拟家庭间新建VXLAN连接,并修改新建VXLAN连接的VXLAN FDB表,以使虚拟家庭间二层网络可达;
    组播模块,其用于驱使vG端通过组播方式向pG端下挂设备广播自身所含资源;
    第一单播模块,其用于驱使pG端下挂设备通过单播方式告知vG端自身所需资源;
    第二单播模块,其用于驱使vG端通过单播方式发送pG端下挂设备所需资源。
  7. 如权利要求6所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统,其特征在于,
    所述vG端通过组播方式广播自身所含资源之前,具体包括:
    修改vG端新建VXLAN连接VTEP端的FDB表,以使vG端的组播包可达pG端;
    修改vG端的OpenFlow流表,以使vG端的源IP地址为未被使用IP地址;
    所述pG端下挂设备通过单播方式告知vG端自身所需资源之前,具体包括:
    修改pG端VXLAN连接VTEP端的FDB表,以使pG端下挂设备的单播包可达vG端;
    修改pG端的OpenFlow流表,以使pG端下挂设备发往vG端的报文的源IP地址为未被使用IP地址。
  8. 如权利要求7所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统,其特征在于,修改vG端新建VXLAN连接VTEP端的FDB表,修改vG端的OpenFlow流表,具体包括:
    vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为未被使用的第一IP地址;
    修改vG端新建VXLAN连接中VTEP端FDB表,将组播包的目的mac地址对应为pG端vtep端点。
  9. 如权利要求8所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统,其特征在于,修改pG端VXLAN连接VTEP端的FDB表,修改pG端的OpenFlow流表,具体包括:
    pG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将pG端下挂设备发往vG端报文的源IP地址映射为未被使用的第二IP地址;
    修改pG端虚拟交换机中ARP表,将第一IP地址对应为vG端的mac地址;
    将pG端VXLAN连接VTEP端FDB表中,vG端的mac地址对应为vG端VTEP端点。
  10. 如权利要求9所述的一种基于VXLAN和OpenFlow的虚拟家庭网络共享系统,其特征在于,所述vG端通过单播方式发送pG端下挂设备所需资源之前,还包括:
    vG端虚拟交换机中进行IP映射,并通过下发OpenFlow流表,将vG端的源IP地址映射为第一IP地址;
    修改vG端虚拟交换机中ARP表,将第二IP地址对应为pG端下挂设备的mac地址;
    将vG端新建VXLAN连接VTEP端FDB表中,pG端下挂设备 的mac地址对应为pG端VTEP端点。
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