WO2020220459A1 - Procédé et système basés sur vxlan et openflow permettant de partager un réseau domestique virtuel - Google Patents

Procédé et système basés sur vxlan et openflow permettant de partager un réseau domestique virtuel Download PDF

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Publication number
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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Prior art keywords
vxlan
address
vtep
virtual
modify
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Chinese (zh)
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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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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection 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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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

La présente invention concerne le domaine de transfert de messages de données, et concerne ainsi un procédé et un système basés sur VXLAN et OpenFlow permettant de partager un réseau domestique virtuel. Le procédé consiste : à établir une connexion VXLAN, et à connecter une extrémité vG et une extrémité pG de maisons virtuelles ; à établir une nouvelle connexion VXLAN entre des maisons virtuelles, et à modifier une table VXLAN FDB de la connexion VXLAN nouvellement établie de sorte qu'un réseau à deux couches entre les maisons virtuelles peut être obtenu ; à contenir de ce fait les ressources de multidiffusion d'extrémité vG dans un dispositif de suspension d'extrémité pG au moyen d'un mode de multidiffusion ; à notifier, par conséquent, au moyen du dispositif de suspension d'extrémité pG, à l'extrémité vG, les ressources requises au moyen d'un mode de diffusion individuelle ; et à envoyer, au moyen de l'extrémité vG, les ressources requises par le dispositif de suspension d'extrémité pG au moyen d'un mode de diffusion individuelle. La présente invention peut permettre la transmission de messages de données entre diverses maisons virtuelles, mettant ainsi en œuvre un partage de ressources.
PCT/CN2019/094124 2019-04-30 2019-07-01 Procédé et système basés sur vxlan et openflow permettant de partager un réseau domestique virtuel Ceased WO2020220459A1 (fr)

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