CN104468384B - A kind of system and method for realizing multi-priority services - Google Patents

A kind of system and method for realizing multi-priority services Download PDF

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Publication number
CN104468384B
CN104468384B CN201410807954.3A CN201410807954A CN104468384B CN 104468384 B CN104468384 B CN 104468384B CN 201410807954 A CN201410807954 A CN 201410807954A CN 104468384 B CN104468384 B CN 104468384B
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vlan
vxlan
packet
step
data
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CN201410807954.3A
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CN104468384A (en
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余平
孙雷
姚晶
陈斌
柴卓原
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武汉绿色网络信息服务有限责任公司
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Abstract

A kind of system and method for realizing multi-priority services, it is related to computer communication technology field, the system includes SDN controllers, at least a VxLAN gateway and at least two VLAN interchangers, and the SDN controllers include northbound interface processing module, IP Process Module, ARP processing modules, Topology Management module, intercommunication area management module, SDN OpenFlow interface modules;Every VxLAN gateway include configuration management module, VxLAN OpenFlow interface modules, flow table management module, tunnel encapsulation processing module, tunnel decapsulation processing module, using layer service recognition processing module, VxLAN send and receive packets modules;Every VLAN interchanger includes VLAN send and receive packets module, VLANID modules.The present invention is not required hardware performance, without using special Communication processor, reduces equipment cost.

Description

A kind of system and method for realizing multi-priority services

Technical field

The present invention relates to computer communication technology field, is specifically a kind of system for realizing multi-priority services and side Method.

Background technology

SDN (software defined networking, software defined network) is the hot topic of the current network communications field Topic, because the control of its isolated switch and forwarding capability obtain pursuing energetically for major network equipment vendor.In recent years, with net Network technology and the variation developed rapidly with network insertion form of application, network become to become increasingly complex, meanwhile, user service Also become increasingly complex.

According to the statistics to China's Internet service flow, P2P business occupies substantial amounts of width in miscellaneous service at present Band.Occur the extreme congestion that a large amount of P2P business cause network on network, loss is brought to operator and enterprise customer.For fortune Seek business, due to being continuously increased, it is necessary to carry out dilatation to network for broadband user's line duration and flow, cause its network cost and Maintenance cost increase;For enterprise customer, network busy is caused in its a large amount of broadband shared by P2P business, so as to can not Ensure the key business quality of enterprise customer.Therefore, in order to ensure that key business and application are preferably served in limited broadband. Need to identify different business, different business is handled using different disposal order.

Occurs the network for the specialized hardware for increasing the hardware-accelerated framework based on special communication processor in the prior art Equipment.The task such as P2P flow control process, QoS processing is handled using specialized hardware, above-mentioned by extra hardware handles Task, although without influence on the service process performance of the network equipment, these special Communication processor general cost ratios It is higher, it is unsuitable to apply in low and middle-end equipment.

The content of the invention

For defect present in prior art, it is an object of the invention to provide it is a kind of realize multi-priority services be System and method, the present invention are not required hardware performance, without using special Communication processor, reduce equipment cost.

To achieve the above objectives, the present invention adopts the technical scheme that:A kind of system for realizing multi-priority services, including SDN controllers, at least a VxLAN gateway and at least two VLAN interchangers, every VxLAN gateway include:Flow table manages mould Block, preserve handling process of the SDN controllers to VxLAN gateway reported data streams;Tunnel encapsulation processing module, it is current for obtaining The handling process of upstream is current upstream addition VxLAN tunnels according to handling process and adds priority, shape Into encapsulated data packet, flowed to according to priority forwarding uplink data in three-layer network;Use VxLAN Header heads reserved word Duan Cunfang priority values;Tunnel decapsulation processing module, for obtaining the handling process of current downlink data flow, according to processing stream Journey is current downlink data diffluence except VxLAN tunnels and changes VLAN ID, forms decapsulation packet, so as to obtain current downlink Data flow can communicate in double layer network;Using layer service recognition processing module, receive for parsing VxLAN gateways Row packet/downlink data packet, and its type of service is identified, upstream/downstream data flow is converted into, and be forwarded to Flow table management module;The SDN controllers include:IP Process Module, for other data types in addition to ARP data types Processing;ARP processing modules, for for SDN controllers proxy requests/reply ARP message, opening up for purpose user to be obtained for controller Flutter information;Topology Management module, for obtaining global network topology information for SDN controllers;Intercommunication area management module, for connecing The communication configuration received and read SDN controllers between all VxLAN gateways, forwarding communication configuration to Topology Management module;SDN OpenFlow interface modules, the OpenFlow message of SDN controllers is reported to for receiving and handling VxLAN gateways;Issue SDN The processing data bag of controller is to VxLAN gateways.

On the basis of above-mentioned technical proposal, every VxLAN gateway also includes:Configuration management module, for reading VxLAN The postrun parameter information of gateway program, by parameter acquiring VxLAN gateways need the SDN controllers IP address that connects and OpenFlow ports;VxLAN OpenFlow interface modules, for establishing connection between VxLAN gateways and SDN controllers;On The data for reporting VxLAN gateways not found in flow table management module flow to SDN controllers;Receive and handle SDN controllers and issue Handling process;VxLAN send and receive packets modules, the packet of each network interface for receiving VxLAN gateways;For tunnel to be sealed The packet after packet and decapsulation after dress, forwarded according to the network interface of SDN controllers requirement;The SDN controllers also wrap Northbound interface processing module is included, for receiving the priority policy for the different business that application interface issues for SDN controllers.

On the basis of above-mentioned technical proposal, the VxLAN send and receive packets module includes VxLAN packet receivings submodule and VxLAN Give out a contract for a project submodule;The VxLAN packet receivings submodule, the packet of each network interface for receiving VxLAN gateways;It is described VxLAN gives out a contract for a project submodule, for by the packet after tunnel encapsulation and the packet after decapsulation, according to the requirement of SDN controllers Network interface forwarding, the packet after tunnel encapsulation forwarded by the WAN mouths of VxLAN gateways, and the packet after decapsulation passes through The LAN mouths forwarding of VxLAN gateways;Forwarded according to priority.

On the basis of above-mentioned technical proposal, every VLAN interchanger includes:VLAN send and receive packets modules, for receiving VLAN Each network interface packet;For the upstream data bag of reception to be sent to VxLAN gateways;By the downlink data packet of reception Send to affiliated VLAN user;VLANID modules, for received for VLAN interchangers upstream data bag addition VLAN heads, Downlink data packet removes VLAN heads.

On the basis of above-mentioned technical proposal, the VLAN send and receive packets module includes VLAN packet receivings submodule and VLAN gives out a contract for a project Submodule;The VLAN packet receivings submodule, the packet of each network interface for receiving VLAN;The VLAN gives out a contract for a project submodule Block, for the upstream data bag of reception to be sent to VxLAN gateways;The downlink data packet of reception is sent to belonging VLAN's User;The VLAN ID modules include VLAN ID addition submodules and VLAN ID delete submodule;The VLAN ID additions Submodule, for the upstream data bag addition VLAN heads received for VLAN interchangers, VLAN heads include VLAN id informations; VLAN ID delete submodule, and the downlink data packet for being received for VLAN interchangers removes VLAN heads.

On the basis of above-mentioned technical proposal, the Topology Management module includes VxLAN gateway managements submodule, VLAN is handed over Change planes and manage submodule and user management submodule;The VxLAN gateway managements submodule, institute is preserved for being configured according to communication There are the VxLAN communication informations of VxLAN gateways;The VLAN switch managements submodule, for preserving all VLAN interchangers Vlan communication information, vlan communication information include VLAN ID, intercommunication area VNI values and the VLAN interchangers institute of VLAN interchangers The WAN mouth IP address of the VxLAN gateways of category;The user management submodule, for preserving the user under all VLAN interchangers Information, user profile include:The IP address of user, MAC Address, the WAN mouth IP address of the affiliated VxLAN gateways of user.

The present invention also provides a kind of method for realizing multi-priority services based on said system, including source user, source are used The first VLAN interchangers and the first VxLAN gateways that family uses;The 2nd VLAN interchangers that purpose user, purpose user use and 2nd VxLAN gateways;This method comprises the following steps:Step S1. is default all in the intercommunication area management module of SDN controllers The intercommunication configuration of territory of VxLAN gateways, VxLAN gateway WAN mouths and next-hop route all set IP address;In northbound interface processing Module presets all application layer service priority;Step S2. source users initiate to ask to purpose user, are handed over by the first VLAN Change planes and send packet to the first VxLAN gateways, while the first VLAN interchangers are that the packet adds VLAN heads;Step S3. the application layer type of service that packet is parsed using layer service recognition processing module of the first VxLAN gateways, is set to APP ID values;A data stream is formed by the five-tuple and APP ID values of packet;The stream of the VxLAN gateways of step S4. the first Table management module checks that the data flow whether there is, if it is not, packet and APP ID values then to be reported to the SDN of SDN controllers OpenFlow interface modules, go to step S5;If so, then being handled according to the handling process in the flow table, step S7 is gone to; Step S5.SDN OpenFlow interface modules judge whether packet belongs to ARP types, if so, being then forwarded to ARP processing moulds Block, step S9 is gone to, if it is not, then going to step S6;Step S6. carries out IP flow processings, goes to step S7;Step S7. second The priority value of the packet received using the parsing of layer service recognition processing module in VxLAN gateways, priority treatment are preferential The high downlink data packet of level, is inquired about in the flow table management module of the 2nd VxLAN gateways, if failure is searched, by packet SDN controllers are reported to, go to step S8;If searching successfully, handled according to the handling process in the flow table, go to step Rapid S10;Step S8.SDN controllers are informed the 2nd VxLAN gateways decapsulation VxLAN heads by OpenFlow message and changed VLAN ID values in packet are the VLAN ID of the 2nd VLAN interchangers;SDN controllers inform by OpenFlow message The newly-built data flow of two VxLAN gateways;The data flow is added in flow table by the flow table management module of the 2nd VxLAN gateways, the The tunnel decapsulation processing module of two VxLAN gateways parses the packet in the data flow, removes packet VxLAN heads simultaneously VLAN ID values are changed, and amended packet is forwarded to the 2nd VLAN interchangers from LAN mouths, go to step S10;Step S9. ARP flow processings are carried out, go to step S10;The VLAN interchangers of step S10. the 2nd delete the VLAN ID heads of packet, And forward it to purpose user;The user of step S11. mesh carries out different replies to different types of data bag.

It is further comprising the steps of on the basis of above-mentioned technical proposal:The VLAN interchangers of step S12. the 2nd receive purpose The upstream data bag that user replys, VLAN heads are added for the packet, are sent to the 2nd VxLAN gateways;Step S13. second VxLAN gateways form a data stream by the five-tuple of current data packet, and the flow table management module of the 2nd VxLAN gateways is checked Data flow whether there is, if so, then being handled according to the stream process, terminate;If it is not, then go to step S14;Step S14. Two VxLAN gateways report to current data packet the SDN OpenFlow interface modules of SDN controllers, go to step S5.

On the basis of above-mentioned technical proposal, in step S6, the progress IP flow processings concretely comprise the following steps:Step S601. judge whether packet belongs to IP packets, if it is not, then by data packet discarding;If so, it will then be forwarded to IP processing moulds Block, go to step S602;APP ID values in the packet of acquisition and northbound interface are handled mould by step S602.SDN controllers The APP ID values of related service are compared in block, if equal, it is determined that the priority value of the packet, if unequal, after The APP ID values of continuous relatively other business;The address of the Topology Management module polls source user of SDN controllers whether there is, if It is to go to step S604, if it is not, then going to step S603;Step S603. Topology Management modules determine source user by packet Affiliated the first VxLAN gateways, the first VLAN interchangers and VNI values, preserve the user profile of source user;Step S604.SDN is controlled The address of the Topology Management module polls purpose user of device processed whether there is, and otherwise forward step S9;If so, go to step S605;Step S605.SDN controllers by the configuration informations of the first VxLAN gateways, obtain packaging V xLAN heads value and The data are gone out the value of port;SDN OpenFlow interface modules by OpenFlow message the value on packaging V xLAN heads, go out The value of port, priority value is gone to inform the first VxLAN gateways and the newly-built data flow, the flow table management mould of the first VxLAN gateways The data flow is added in flow table by block, and the tunnel encapsulation processing module of the first VxLAN gateways parses the number in the data flow According to bag, packet encapsulation VxLAN heads are given, and the packet after encapsulation is forwarded to the 2nd VxLAN gateways from WAN mouths, are turned To step S10.

On the basis of above-mentioned technical proposal, in step S9, the progress ARP flow processings concretely comprise the following steps:Step S901.ARP processing modules judge the ARP data types of packet, if ARP request packet, then go to step S903;Such as Fruit is that ARP replys packet, then goes to step S902;The Topology Management module polls source user of step S902.SDN controllers Address whether there is, if it is not, then Topology Management module determines the 2nd VxLAN belonging to purpose user by ARP reply packets Gateway, the 2nd VLAN interchangers and VNI values, preserve user profile and the end of purpose user;If so, then terminate;Step The address of the Topology Management module polls source user of S903.SDN controllers whether there is, if it is not, then Topology Management module passes through ARP request packet determines the first VxLAN gateways, the first VLAN interchangers and the VNI values belonging to source user, preserves source user User profile, go to step S904;If so, then pass directly to step S904;The Topology Management mould of step S904.SDN controllers The address of block inquiry purpose user whether there is, if so, then going to step S905;If it is not, then go to step S906;Step S905.SDN controllers directly act on behalf of purpose user, and packet is replied and terminated;In step S906.SDN controllers The ARP request packet is converted to ARP proxy request data package by ARP processing modules, and is sent and extremely existed with the first VxLAN gateways All VxLAN gateways under same intercommunication area, all VxLAN gateways forward the ARP proxy request data package by LAN mouths To VLAN interchangers, step S10 is gone to.

The beneficial effects of the present invention are:

1st, in the present invention, VxLAN (Virtual extensible LAN, virtual expansible LAN) gateway receives data Business identifying processing is carried out to packet by application layer service recognition processing module after bag, the module has different business data The format identification function of bag, it can quickly identify business datum Packet type, it is not necessary to special hardware identifies type of service, because This is not required hardware performance, without using special Communication processor, reduces equipment cost.

2nd, by WEB interface configuration preference level strategy in the present invention, therefore the flexibility with real-time operation, ensure at any time Key business service quality.

3rd, in the present invention, priority policy value is arranged in VxLAN Header reserved bits, the reserved bit there are 4 words Section, therefore there is scalability.

Brief description of the drawings

Fig. 1 is the structured flowchart that multi-priority services system is realized in the embodiment of the present invention;

Fig. 2 is the structured flowchart of SDN controllers in the embodiment of the present invention;

Fig. 3 is the structured flowchart of VxLAN gateways in the embodiment of the present invention;

Fig. 4 is the structured flowchart of VLAN interchangers in the embodiment of the present invention;

Fig. 5 is the structured flowchart of VxLAN Header in the embodiment of the present invention;

Fig. 6 is the flow chart that multi-priority services method is realized in the embodiment of the present invention;

Fig. 7 is to realize IP handling processes in multi-priority services method in the embodiment of the present invention;

Fig. 8 is to realize ARP handling processes in multi-priority services method in the embodiment of the present invention.

Embodiment

The present invention is described in further detail below in conjunction with drawings and Examples.

It is shown in Figure 1, a kind of system for realizing multi-priority services, including SDN controllers, an at least VxLAN Gateway (VxLAN gateways) and at least two VLAN (Virtual Local Area Network, VLAN) exchanges Machine, the SDN controllers are connected by OpenFlow agreements with each VxLAN gateway, and each VxLAN gateway respectively with At least two VLAN interchangers are connected;The SDN controllers include northbound interface processing module, IP Process Module, ARP processing moulds Block, Topology Management module, intercommunication area management module, SDN OpenFlow interface modules;Every VxLAN gateway includes configuration management Module, VxLANOpenFlow interface modules, flow table management module, tunnel encapsulation processing module, tunnel decapsulation processing module, Using layer service recognition processing module, VxLAN send and receive packets modules;Every VLAN interchanger include VLAN send and receive packets module, VLANID modules.

Shown in Figure 2, the SDN controllers include IP Process Module, for other data in addition to ARP data types The processing of type;SDN controllers report OpenFlow message by VxLAN gateways, obtain the application layer of the OpenFlow message Type of service (will be arranged to APP ID values) using layer service identification types, and SDN controllers obtain according to northbound interface processing module The priority of the type of service is taken, priority is issued to the packet reported;Meanwhile it is the upstream data encapsulation VxLAN tunnels Road, remove the encapsulation in tunnel and VLAN ID modification for downlink data packet.All VxLan gateways are obtained according to communication configuration The handling process of other data types outside the ARP data types reported, handling process are included under priority value (Priority) Hair, shown in Figure 5, VxLAN Header have 8 bytes, wherein the 1st byte and the 5th, 6,7 byte are used, 2nd, 3,4,8 byte is retained, and deposits priority value used here as the 8th byte, priority value is defined as into Priority (1 ~255);If not enough, expanding with the 2nd, 3,4 byte.VLAN ID modification, the encapsulation in tunnel and the decapsulation in tunnel. VxLAN heads include all data of VxLAN tunnel encapsulations, include ether net head, IP heads, UDP heads and VxLAN Header.

ARP processing modules, for being SDN controllers proxy requests/reply ARP message (in the LAN of the first VxLAN gateways Salty new broadcast agent inquiry), for the topology information of controller acquisition purpose user;Specifically, the ARP processing modules are SDN controllers receive the packet that VxLAN gateways report, when not finding purpose user in user's topological structure, SDN controls Device processed sends the broadcast data of request purpose user's MAC address to all VxLAN gateways under same intercommunication area, according to mesh The reply data of user obtain the user profile.

Topology Management module, for obtaining global network topology information for SDN controllers;Topology Management module includes VxLAN gateway managements submodule, VLAN switch managements submodule and user management submodule;VxLAN gateway managements submodule, VLAN switch managements submodule and user management submodule (have by the way that a chained list is interrelated under VxLAN gateway architecture bodies VLAN switch architecture bodies, have user's structure under VLAN switch architecture bodies), VxLAN gateway managements submodule, VLAN are exchanged Machine manages submodule and user management submodule can be searched mutually by chained list.The VxLAN gateway managements submodule, is used for The VxLAN communication informations of all VxLAN gateways are preserved according to communication configuration;The VLAN switch managements submodule, for protecting The vlan communication information of all VLAN interchangers is deposited, vlan communication information includes VLAN ID, the intercommunication area VNI of VLAN interchangers The WAN of VxLAN gateways belonging to (VxLANNetwork Identifier, VxLAN network identity) value and VLAN interchangers Mouth IP address;The user management submodule, for preserving the user profile under all VLAN interchangers, user profile includes: The IP address of user, MAC Address, the WAN mouth IP address of the affiliated VxLAN gateways of user.

Intercommunication area management module, for receiving and reading the configuration of the communication between SDN controllers and all VxLAN gateways, Forwarding communication is configured to Topology Management module;Specifically, the communication configuration in the intercommunication area management module is matched somebody with somebody by web interface Put or configuration file configuration, communication configuration can be configured by web interface, can also configured from configuration file.Communication configuration includes The IP address of VxLAN gateways, LAN (Local Area Network, LAN) mouth value, the MAC Address of LAN mouths, WAN (Wide Area Network, wide area network) mouth value, the MAC Address of WAN mouths, WAN mouths IP address, WAN mouth next-hop routed ip address and under One jumps route MAC Address.It can be realized by the WAN mouths IP address and next-hop routed ip address that configure VxLAN gateways specified Intercommunication between VxLAN gateways.

SDN OpenFlow interface modules, SDN controls are reported to for receiving and handling VxLANOpenFlow interface modules The OpenFlow message of device;The processing data bags of SDN controllers is issued to VxLANOpenFlow interface modules.

Northbound interface processing module, for receiving the priority plan for the different business that application interface issues for SDN controllers Slightly.Can be XML (Extensible Markup Language, Markup Language) or JSON Data formats such as (JavaScript Object Notation, JavaScript object representations).Specifically, the north orientation connects Communication configuration in mouth processing module is configured by web interface, and user passes through application layer delineation of activities priority.Using layer service Video conference, online audio, instant messaging, financial software, mail transmission/reception etc. can be roughly divided into.

Shown in Figure 3, every VxLAN gateway includes flow table management module, preserves SDN controllers on VxLAN gateways Report the handling process of data flow;Specifically, the flow table management module of the VxLAN gateways preserves SDN controllers to VxLAN gateways When reporting the handling process of stream, after VxLAN gateways receive upstream or downstream data flow, flow table management module, which is searched, to be worked as Preceding upstream or downstream data flow whether there is, if so, determining that current upstream or downstream data flow are not first Send, handled according to current upstream or downstream data flow handling process and send current upstream or downlink data Stream;Otherwise current upstream or downstream data flow are determined to send first, by current upstream or downstream data flow Sent by VxLANOpenFlow interface modules to SDN controller OpenFlow interface modules.

Tunnel encapsulation processing module, after receiving upstream for VxLAN gateways, obtained by flow table management module The handling process of current upstream, it is that current upstream adds VxLAN tunnels and addition is preferential according to handling process Level, encapsulated data packet is formed, is flowed to according to priority forwarding uplink data in three-layer network;Protected using VxLAN Header heads Section of writeeing down characters (last 1 byte) deposits priority value, and priority value is defined as into Priority (1~255).

Tunnel decapsulation processing module, after receiving downstream data flow for VxLAN gateways, VxLAN gateways pass through flow table Management module obtains the handling process of current downlink data flow, is that current downlink data diffluence removes VxLAN tunnels according to handling process VLAN ID are simultaneously changed in road, deblocking packet are formed, so that proper preceding downstream data flow can communicate in double layer network.

Using layer service recognition processing module, the upstream data bag/downlink data received for parsing VxLAN gateways Bag, and its type of service is identified, upstream/downstream data flow is converted into, and be forwarded to flow table management module;Specifically , after VxLAN gateways receive upstream data bag, the packet application layer type of service (obtaining APP ID values) is parsed, and tie Close five-tuple principle and APP ID values form a upstream, be transmitted to flow table management module;VxLAN gateways receive descending After packet, parse application layer service priority value in the packet (obtain Priority values), with reference to five-tuple principle with Priority values form a downstream data flow, and according to the high first treatment principle of priority, the high data flow of forwarding priority is given Flow table management module.

Configuration management module, for reading the postrun parameter information of VxLAN gateway programs, pass through parameter acquiring VxLAN Gateway needs SDN controllers IP address and the OpenFlow ports connected.

VxLANOpenFlow interface modules use OpenFlow consensus standards, in VxLAN gateways and SDN controllers Between establish connection;The data for reporting VxLAN gateways not found in flow table management module flow to SDN controllers;Receive and locate The handling process that reason SDN controllers issue.

VxLAN send and receive packets modules, the packet of each network interface for receiving VxLAN gateways;For by tunnel encapsulation Packet after rear packet and decapsulation, forwarded according to the network interface of SDN controllers requirement;The VxLAN send and receive packets module Give out a contract for a project submodule including VxLAN packet receivings submodule and VxLAN;The VxLAN packet receivings submodule, for receiving VxLAN gateways The packet of each network interface;The VxLAN gives out a contract for a project submodule, for by the packet after tunnel encapsulation and the number after decapsulation According to bag, being forwarded according to the network interface of SDN controllers requirement, the packet after tunnel encapsulation is forwarded by the WAN mouths of VxLAN gateways, Packet after decapsulation is forwarded by the LAN mouths of VxLAN gateways;Forwarded according to priority.

Shown in Figure 4, every VLAN interchanger includes VLAN send and receive packets modules, for receiving VLAN each network interface Packet;For the upstream data bag of reception to be sent to VxLAN gateways;The downlink data packet of reception is sent to affiliated VLAN user;VLANID modules, the upstream data bag for being received for VLAN interchangers add VLAN heads, downlink data packet Remove VLAN heads.Preferably, the VLAN send and receive packets module includes VLAN packet receivings submodule and VLAN and given out a contract for a project submodule;It is described VLAN packet receiving submodules, the packet of each network interface for receiving VLAN;The VLAN gives out a contract for a project submodule, for that will receive Upstream data bag send to VxLAN gateways;The downlink data packet of reception is sent to belonging VLAN user;The VLAN ID modules include VLAN ID addition submodules and VLAN ID delete submodule;The VLAN ID add submodule, for for The upstream data bag addition VLAN heads that VLAN interchangers receive, VLAN heads include VLAN id informations;VLAN ID delete son Module, the downlink data packet for being received for VLAN interchangers remove VLAN heads.

Shown in Figure 6, the method for realizing multi-priority services based on said system, including source user, source user make First VLAN interchangers and the first VxLAN gateways;The 2nd VLAN interchangers and second that purpose user, purpose user use VxLAN gateways.This method comprises the following steps:

Step S1:The intercommunication configuration of territory of all VxLAN gateways, VxLAN are preset in the intercommunication area management module of SDN controllers Gateway WAN mouths and next-hop route all set IP address;It is excellent that all application layer services are preset in northbound interface processing module First level;Wherein, all application layer service priority are preset in the northbound interface processing module of SDN controllers, video conference is excellent First level is 1, and video conference priority is 2, online audio priory level is 3, instant messaging priority is 4, financial software priority It is 6 for 5, mail transmission/reception priority.

Step S2:Source user passes through the first VLAN interchangers and sends packet to first to during purpose user initiation request VxLAN gateways, while the first VLAN interchangers are that the packet adds VLAN heads.

Step S3:The application layer service class that packet is parsed using layer service recognition processing module of first VxLAN gateways Type, it is set to APP ID values;A data stream is formed by the five-tuple and APP ID values of packet;The five-tuple includes Source IP address, purpose IP address, source MAC, target MAC (Media Access Control) address and the data type of current video conferencing data bag.

Step S4:The flow table management module of first VxLAN gateways checks that the data flow whether there is, if it is not, then by data Bag and APP ID values report to the SDN OpenFlow interface modules of SDN controllers, go to step S5;If so, then according to the stream Handling process in table is handled, and goes to step S7.

Step S5:SDN OpenFlow interface modules judge whether packet belongs to ARP types, if so, being then forwarded to ARP Processing module, step S9 is gone to, if it is not, then going to step S6.

Step S6:IP flow processings are carried out, go to step S7.

Step S7:In 2nd VxLAN gateways using layer service recognition processing module parsing receive packet it is excellent First level value, the high downlink data packet of priority treatment priority (Priority values are smaller more preferential), in the stream of the 2nd VxLAN gateways Inquired about in table management module, if searching failure, packet is reported into SDN controllers, goes to step S8;If search into Work(, then handled according to the handling process in the flow table, go to step S10.

Step S8:Data flow is reported SDN controllers, SDN controls by the OpenFlow interface modules in the 2nd VxLAN gateways Device processed finds the 2nd VLAN under the 2nd VxLAN gateways by the value of the VNI in reported data bag in Topology Management module Interchanger is under the VNI.SDN controllers inform that the 2nd VxLAN gateways decapsulate VxLAN heads by OFPT_PACKET_OUT And change the VLAN ID that the VLAN ID values in packet are the 2nd VLAN interchangers;SDN controllers pass through OFPT_FLOW_MOD Inform the newly-built data flow of the 2nd VxLAN gateways;The OpenFlow interface modules of 2nd VxLAN gateways receive OFPT_FLOW_ After MOD message, the data flow is added in flow table by the flow table management module of the 2nd VxLAN gateways, the tunnel of the 2nd VxLAN gateways Road decapsulation processing module parses the packet in the data flow, removes packet VxLAN heads and changes VLAN ID values, And amended packet is forwarded to the 2nd VLAN interchangers from LAN mouths, go to step S10.

Step S9:ARP flow processings are carried out, go to step S10.

Step S10:2nd VLAN interchangers delete the VLAN ID heads of packet, and forward it to purpose user;Tool Body, after the packet receiving modules of the 2nd VLAN interchangers receives downlink data packet, it is given to VLAN ID and deletes submodule, the module Packet VLAN ID are deleted, the module of giving out a contract for a project of the 2nd VLAN interchangers removes this packet after VLAN ID and is sent to purpose User.

Step S11:Purpose user carries out different replies to different types of data bag.

Step S12:2nd VLAN interchangers receive the upstream data bag that purpose user replys, and VLAN is added for the packet Head, send to the 2nd VxLAN gateways;Specifically, after the packet receiving module of the 2nd VLAN interchangers receives the upstream data bag, turn Issue VLAN ID addition submodules, the module gives packet addition VLAN heads, and VLAN submodules of giving out a contract for a project are sent data packets to 2nd VxLAN gateways.

Step S13:2nd VxLAN gateways form a data stream, the 2nd VxLAN nets by the five-tuple of current data packet The flow table management module of pass checks that data flow whether there is, if so, then being handled according to the stream process, terminates;If it is not, then turn To step S14.

Step S14:2nd VxLAN gateways report to current data packet the SDN OpenFlow interface moulds of SDN controllers Block, go to step S5.

Shown in Figure 7, the progress IP flow processings concretely comprise the following steps:

Step S601. judges whether packet belongs to IP packets, if it is not, then by data packet discarding;If so, then will forwarding To IP Process Module, step S602 is gone to.

Step S602.SDN controllers are related to northbound interface processing module by the APP ID values in the packet of acquisition The APP ID values of business are compared, if equal, it is determined that the priority value of the packet, if unequal, continue to compare it The APP ID values of his business;Specifically, the IP packets of current non-ARP types are handled, northbound interface in SDN controllers It is 1 that processing module, which obtains video conference grade, in the APP ID values and northbound interface processing module in the packet reported Video conference APP ID (the application layer service identification APP ID values between controller and interchanger are consistent) value compares, equal It is video conference to illustrate the business, and it is 1 to determine the packet priority grade, i.e., Priority values are 1.It is unequal to continue to compare it He is business APP ID, so that all business compare end, if still do not found, it is default value 0 to determine the APP ID values;Root Smaller according to priority value, more the principle of priority treatment, SDN controllers handle videoconference data bag first, SDN controllers The address of Topology Management module polls source user whether there is, if so, step S604 is gone to, if it is not, then going to step S603.

Step S603. Topology Managements module determines the first VxLAN gateways, the first VLAN belonging to source user by packet Interchanger and VNI values, preserve the user profile of source user.

The address of the Topology Management module polls purpose user of step S604.SDN controllers whether there is, otherwise forwarding step Rapid S9;If so, go to step S605.

Step S605.SDN controllers by the configuration informations of the first VxLAN gateways, obtain the value on packaging V xLAN heads with And the data are gone out the value of port;SDN OpenFlow interface modules are by OFPT_PACKET_OUT packaging V xLAN heads Be worth, the value for port of going out, priority value inform the first VxLAN gateways, the first VxLAN gateways are informed by OFPT_FLOW_MOD The newly-built data flow, after the OpenFlow interface modules of the first VxLAN gateways receive the OFPT_FLOW_MOD message, first The data flow is added in flow table by the flow table management module of VxLAN gateways.After receiving OFPT_PACKET_OUT message, the The tunnel encapsulation processing module of one VxLAN gateways parses the packet in the data flow, gives packet encapsulation VxLAN heads Portion, last byte in VxLAN Header is no longer save value 0, but Priority values 1, and by the data after encapsulation Bag is forwarded to the 2nd VxLAN gateways from WAN mouths, goes to step S10.Wherein, the value on the acquisition packaging V xLAN heads include with And the data are gone out the value of port;Wherein, VxLAN heads source MAC is the first VxLAN gateway WAN mouth MAC Address, purpose MAC Address is that next-hop route MAC Address, and the data type of Ethernet bearing be IPv4, and IPv4 heads source IP v4 addresses are the One VxLAN gateway WAN mouth IPv4 addresses, purpose IPv4 addresses are that next-hop route IPv4 addresses, the data type of IPv4 carryings For UDP, UDP source ports and destination interface are all the VxLAN Header, VxLAN of 8 bytes of addition behind 4789, UDP heads The VNI values of VNI values in Header belonging to the first VLAN interchangers, the priority value in VxLAN Header is SDN controls The value that device obtains from northbound interface processing module, the go out value of port of data is the first VxLAN gateway WAN mouth values.

Shown in Figure 8, the progress ARP flow processings concretely comprise the following steps:

Step S901.ARP processing modules judge the ARP data types of packet, if ARP request packet, then turn To step S903;If ARP replys packet, then step S902 is gone to.

The address of the Topology Management module polls source user of step S902.SDN controllers whether there is, if it is not, then topological Management module determines the 2nd VxLAN gateways, the 2nd VLAN interchangers and the VNI belonging to purpose user by ARP reply packets Value, preserve user profile and the end of purpose user;If so, then terminate;Specifically, user management submodule passes through current ARP VxLAN gateway ip address in reply packet determines the 2nd VxLAN gateways belonging to purpose user;Replied by current ARP VLAN ID in packet VLAN heads determine VLAN the and VNI values of purpose user, preserve the user profile of purpose user, knot Beam.

The address of the Topology Management module polls source user of step S903.SDN controllers whether there is, if it is not, then topological Management module determines the first VxLAN gateways, the first VLAN interchangers and the VNI values belonging to source user by ARP request packet, The user profile of source user is preserved, goes to step S904;If so, then pass directly to step S904;Specifically, user management submodule Block determines the first VxLAN gateways belonging to source user by the first VxLAN gateway address in packet;Pass through video conference number VLAN the and VNI values of source user are determined according to the VLAN ID in bag VLAN heads, preserve the user profile of source user.

The address of the Topology Management module polls purpose user of step S904.SDN controllers whether there is, if so, then turning To step S905;If it is not, then go to step S906.

Step S905.SDN controllers directly act on behalf of purpose user, and packet is replied and terminated.

The ARP request packet is converted to ARP proxy number of request by the ARP processing modules in step S906.SDN controllers According to bag, specifically, it is 0.0.0.0 that the ARP request packet is modified as into source IP, source MAC is VxLAN gateway LAN mouth MAC, mesh The constant ARP proxy request data packages of IP.By ARP proxy request data package send to the first VxLAN gateways same The ARP proxy request data package is forwarded to VLAN by all VxLAN gateways under intercommunication area, all VxLAN gateways by LAN mouths Interchanger, go to step S10.

Method of work during present invention actual use comprises the following steps:

A, the hardware device (such as computer, virtual machine etc.) that five operating systems are linux is prepared, one in five equipment For SDN controllers, two are VxLAN gateways, and two are VLAN interchangers.Respectively five equipment set corresponding IP address, The WAN mouths IP address and next-hop routed ip address of VxLAN gateways need to configure, and VxLAN gateway WAN data bags can be sent out It is sent in three-layer network.

B, the configuration management module of VxLAN gateways is write, it is mainly in VxLAN gateways to write configuration management module VxLANOpenFlow interface module services, VxLAN gateways are connected to SDN controllers, VxLAN gateways by OpenFlow agreements Need to know IP address and the OpenFlow ports of SDN controllers.In order to increase project flexibility in reality, connection SDN controllers IP address can not be write extremely in a program, can be configured by the postrun parameter of program, configuration management module Being capable of parameter, acquisition SDN controllers IP address and OpenFlow ports.

C, the SDN OpenFlow interface modules of SDN controllers and the VxLANOpenFlow interface moulds of VxLAN gateways are write Block, OpenFlow interfaces can separate switch processes data and forward the ability of data, realize SDN environment.

D, the intercommunication area management module of SDN controllers is write, because the VLAN ID under a VLAN interchanger there are 4096 Value, need to realize a VxLAN gateway and the communication of another VxLAN gateway in reality, in order to isolate each group of communication, need Distinguished with VNI, user needs to configure intercommunication area.

Then the configuration can be write SDN controllers by the configuration of intercommunication area by the interface configurations intercommunication area of application layer Database either by Applied layer interface send intercommunication area configuration information created to SDN controllers or on SDN controllers Intercommunication domain configuration file.

E, the Topology Management module of SDN controllers is write, Topology Management module realizes that SDN controllers have global topology Information, Topology Management module are to preserve topology information by way of Hash chained lists.

F, the ARP processing modules of SDN controllers are write, ARP processing modules mainly realize the base for obtaining purpose IPv4 user This information.

G, the IP Process Module of SDN controllers is write, IP Process Module mainly realizes other IP types for removing ARP types The processing of data, mainly inform VxLAN gateways how to IP packet encapsulation VxLAN heads, determine packet priority, Remove the modification of VxLAN heads and VLAN ID values.

H, the northbound interface processing module of SDN controllers is write, northbound interface processing module mainly realizes that obtaining user sets The priority policy for the different business put;User set interface data format can be Suresh Kumar, can be XML or JSON etc..

I, the VxLAN gateway flow table management modules in VxLAN gateways are write.The upstream data flow of user passes through 5 tuples Determine that stream whether there is with APPID;The downstream data flow of user determines that stream whether there is by 5 tuples and Priority. It can be determined according to the situation oneself of reality, such as the version of OpenFlow agreements 1.0 is 11 tuples.

J, write the tunnel encapsulation processing module in VxLAN gateways and tunnel decapsulation processing module is mainly realized two layers Network (IPv4 double layer networks either IPv6 double layer networks) packet is sent to three-layer network (IPv4 three-layer networks or IPv6 tri- Layer network) in, another mistake is sent in double layer network to three-layer network.

K, the application layer service identification module in VxLAN gateways is write.User uplink data bag needs to parse APP ID values; User's downlink data packet is needed to parse Priority values, and business processing order is determined by the value.

L, write the send and receive packets module in VxLAN gateways, send and receive packets module mainly realize can capture the up of user and Downlink data packet, deliver packet and handled to other modules.

The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.

Claims (8)

  1. A kind of 1. system for realizing multi-priority services, it is characterised in that including SDN controllers, an at least VxLAN gateway and At least two VLAN interchangers,
    Every VxLAN gateway includes:
    Flow table management module, preserve handling process of the SDN controllers to VxLAN gateway reported data streams;
    Tunnel encapsulation processing module, it is current up according to handling process for obtaining the handling process of current upstream Data flow adds VxLAN tunnels and adds priority, forms encapsulated data packet, three layers are flowed to according to priority forwarding uplink data In network;Priority value is deposited using VxLAN Header heads reserved field;
    Tunnel decapsulation processing module, it is when front lower according to handling process for obtaining the handling process of current downlink data flow Row data diffluence is except VxLAN tunnels and changes VLAN ID, decapsulation packet is formed, so that proper preceding downstream data flow can Communicated in double layer network;
    Using layer service recognition processing module, the upstream data bag/downlink data packet received for parsing VxLAN gateways, and Its type of service is identified, is converted into upstream/downstream data flow, and is forwarded to flow table management module;
    The SDN controllers include:
    IP Process Module, the processing for other data types in addition to ARP data types;
    ARP processing modules, for for SDN controllers proxy requests/reply ARP message, opening up for purpose user to be obtained for controller Flutter information;
    Topology Management module, for obtaining global network topology information for SDN controllers;
    Intercommunication area management module, for receiving and reading the configuration of the communication between SDN controllers and all VxLAN gateways, forwarding Communication is configured to Topology Management module;
    SDN OpenFlow interface modules, the OpenFlow that SDN controllers are reported to for receiving and handling VxLAN gateways disappear Breath;The processing data bags of SDN controllers is issued to VxLAN gateways;
    Every VxLAN gateway also includes:
    Configuration management module, for reading the postrun parameter information of VxLAN gateway programs, pass through parameter acquiring VxLAN gateways Need SDN controllers IP address and the OpenFlow ports connected;
    VxLAN OpenFlow interface modules, for establishing connection between VxLAN gateways and SDN controllers;Report VxLAN nets Close the data not found in flow table management module and flow to SDN controllers;Receive and handle the processing stream that SDN controllers issue Journey;
    VxLAN send and receive packets modules, the packet of each network interface for receiving VxLAN gateways;For by after tunnel encapsulation Packet after packet and decapsulation, forwarded according to the network interface of SDN controllers requirement;
    The SDN controllers also include northbound interface processing module, for the difference issued for SDN controllers reception application interface The priority policy of business;
    Every VLAN interchanger includes:
    VLAN send and receive packets modules, the packet of each network interface for receiving VLAN;For the upstream data bag of reception to be sent out Deliver to VxLAN gateways;The downlink data packet of reception is sent to affiliated VLAN user;
    VLANID modules, the upstream data bag for being received for VLAN interchangers adds VLAN heads, downlink data packet removes VLAN heads.
  2. 2. the system as claimed in claim 1 for realizing multi-priority services, it is characterised in that:The VxLAN send and receive packets module Give out a contract for a project submodule including VxLAN packet receivings submodule and VxLAN;
    The VxLAN packet receivings submodule, the packet of each network interface for receiving VxLAN gateways;
    The VxLAN gives out a contract for a project submodule, for by the packet after tunnel encapsulation and the packet after decapsulation, being controlled according to SDN The network interface of device requirement processed is forwarded, and the packet after tunnel encapsulation is forwarded by the WAN mouths of VxLAN gateways, the data after decapsulation Bag is forwarded by the LAN mouths of VxLAN gateways;Forwarded according to priority.
  3. 3. the system as claimed in claim 1 for realizing multi-priority services, it is characterised in that:The VLAN send and receive packets module bag Include VLAN packet receivings submodule and VLAN gives out a contract for a project submodule;
    The VLAN packet receivings submodule, the packet of each network interface for receiving VLAN;
    The VLAN gives out a contract for a project submodule, for the upstream data bag of reception to be sent to VxLAN gateways;By the downlink data of reception Bag is sent to belonging VLAN user;
    The VLAN ID modules include VLAN ID addition submodules and VLAN ID delete submodule;
    The VLAN ID add submodule, for the upstream data bag addition VLAN heads received for VLAN interchangers, VLAN heads Portion includes VLAN id informations;
    VLAN ID delete submodule, and the downlink data packet for being received for VLAN interchangers removes VLAN heads.
  4. 4. the system as claimed in claim 1 for realizing multi-priority services, it is characterised in that:
    The Topology Management module includes VxLAN gateway managements submodule, VLAN switch managements submodule and user management Module;
    The VxLAN gateway managements submodule, for preserving the VxLAN communication informations of all VxLAN gateways according to communication configuration;
    The VLAN switch managements submodule, for preserving the vlan communication information of all VLAN interchangers, vlan communication letter Breath includes the WAN mouths IP of the VxLAN gateways belonging to VLAN ID, intercommunication area VNI values and the VLAN interchangers of VLAN interchangers Address;
    The user management submodule, for preserving the user profile under all VLAN interchangers, user profile includes:User's IP address, MAC Address, the WAN mouth IP address of the affiliated VxLAN gateways of user.
  5. 5. the method for realizing multi-priority services based on system described in claim 1, it is characterised in that including source user, source The first VLAN interchangers and the first VxLAN gateways that user uses;The 2nd VLAN interchangers that purpose user, purpose user use And the 2nd VxLAN gateways;
    This method comprises the following steps:
    Step S1. presets the intercommunication configuration of territory of all VxLAN gateways, VxLAN gateways in the intercommunication area management module of SDN controllers WAN mouths and next-hop route all set IP address;All application layer service priority are preset in northbound interface processing module;
    Step S2. source users are initiated to ask to purpose user, and packet is sent to the first VxLAN nets by the first VLAN interchangers Close, while the first VLAN interchangers are that the packet adds VLAN heads;
    The application layer type of service that packet is parsed using layer service recognition processing module of the VxLAN gateways of step S3. the first, will It is set to APP ID values;A data stream is formed by the five-tuple and APP ID values of packet;
    The flow table management module of the VxLAN gateways of step S4. the first checks that the data flow whether there is, if it is not, then by packet and APP ID values report to the SDN OpenFlow interface modules of SDN controllers, go to step S5;If so, then according in the flow table Handling process handled, go to step S7;
    Step S5.SDN OpenFlow interface modules judge whether packet belongs to ARP types, if so, being then forwarded to ARP processing Module, step S9 is gone to, if it is not, then going to step S6;
    Step S6. carries out IP flow processings, goes to step S7;
    The priority of the packet received using the parsing of layer service recognition processing module in the VxLAN gateways of step S7. the 2nd Value, the high downlink data packet of priority treatment priority, is inquired about, if looking into the flow table management module of the 2nd VxLAN gateways Look for unsuccessfully, packet is reported into SDN controllers, goes to step S8;If search successfully, according to the handling process in the flow table Handled, go to step S10;
    Step S8.SDN controllers inform the 2nd VxLAN gateways decapsulation VxLAN heads by OpenFlow message and change number According to the VLAN ID that the VLAN ID values in bag are the 2nd VLAN interchangers;SDN controllers inform second by OpenFlow message The newly-built data flow of VxLAN gateways;The data flow is added in flow table by the flow table management module of the 2nd VxLAN gateways, and second The tunnel decapsulation processing module of VxLAN gateways parses the packet in the data flow, removes packet VxLAN heads and repaiies Change VLAN ID values, and amended packet is forwarded to the 2nd VLAN interchangers from LAN mouths, go to step S10;
    Step S9. carries out ARP flow processings, goes to step S10;
    The VLAN interchangers of step S10. the 2nd delete the VLAN ID heads of packet, and forward it to purpose user;
    The user of step S11. mesh carries out different replies to different types of data bag.
  6. 6. the method as claimed in claim 5 for realizing multi-priority services, it is characterised in that further comprising the steps of:
    The VLAN interchangers of step S12. the 2nd receive the upstream data bag that purpose user replys, and VLAN heads are added for the packet Portion, send to the 2nd VxLAN gateways;
    The VxLAN gateways of step S13. the 2nd form a data stream by the five-tuple of current data packet, the 2nd VxLAN gateways Flow table management module checks that data flow whether there is, if so, then being handled according to the stream process, terminates;If it is not, then go to step Rapid S14;
    The VxLAN gateways of step S14. the 2nd report to current data packet the SDN OpenFlow interface modules of SDN controllers, turn To step S5.
  7. 7. the method as claimed in claim 5 for realizing multi-priority services, it is characterised in that in step S6, the carry out IP Flow processing concretely comprises the following steps:
    Step S601. judges whether packet belongs to IP packets, if it is not, then by data packet discarding;If so, it will then be forwarded to IP Processing module, go to step S602;
    Step S602.SDN controllers are by related service in the APP ID values in the packet of acquisition and northbound interface processing module APP ID values be compared, if equal, it is determined that the priority value of the packet, if unequal, continue to compare other industry The APP ID values of business;The address of the Topology Management module polls source user of SDN controllers whether there is, if so, going to step S604, if it is not, then going to step S603;
    Step S603. Topology Managements module determines that the first VxLAN gateways, the first VLAN belonging to source user exchange by packet Machine and VNI values, preserve the user profile of source user;
    The address of the Topology Management module polls purpose user of step S604.SDN controllers whether there is, and otherwise forward step S9;If so, go to step S605;
    Step S605.SDN controllers are obtained the value on packaging V xLAN heads and are somebody's turn to do by the configuration information of the first VxLAN gateways Data are gone out the value of port;SDN OpenFlow interface modules by OpenFlow message the value on packaging V xLAN heads, go out The value of port, priority value inform the first VxLAN gateways and the newly-built data flow, the flow table management module of the first VxLAN gateways The data flow is added in flow table, the tunnel encapsulation processing module of the first VxLAN gateways parses the data in the data flow Bag, gives packet encapsulation VxLAN heads, and the packet after encapsulation is forwarded into the 2nd VxLAN gateways from WAN mouths, goes to Step S10.
  8. 8. the method as claimed in claim 5 for realizing multi-priority services, it is characterised in that in step S9, the carry out ARP Flow processing concretely comprises the following steps:
    Step S901.ARP processing modules judge the ARP data types of packet, if ARP request packet, then go to step Rapid S903;If ARP replys packet, then step S902 is gone to;
    The address of the Topology Management module polls source user of step S902.SDN controllers whether there is, if it is not, then Topology Management Module determines the 2nd VxLAN gateways, the 2nd VLAN interchangers and the VNI values belonging to purpose user by ARP reply packets, protects Deposit the user profile of purpose user and end;If so, then terminate;
    The address of the Topology Management module polls source user of step S903.SDN controllers whether there is, if it is not, then Topology Management Module determines the first VxLAN gateways, the first VLAN interchangers and the VNI values belonging to source user by ARP request packet, preserves The user profile of source user, go to step S904;If so, then pass directly to step S904;
    The address of the Topology Management module polls purpose user of step S904.SDN controllers whether there is, if so, then going to step Rapid S905;If it is not, then go to step S906;
    Step S905.SDN controllers directly act on behalf of purpose user, and packet is replied and terminated;
    The ARP request packet is converted to ARP proxy request data by the ARP processing modules in step S906.SDN controllers Bag, and send to all VxLAN gateways with the first VxLAN gateways under same intercommunication area, all VxLAN gateways should ARP proxy request data package is forwarded to VLAN interchangers by LAN mouths, goes to step S10.
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