CN110022262A - A kind of mthods, systems and devices for realizing planar separation based on SDN network - Google Patents
A kind of mthods, systems and devices for realizing planar separation based on SDN network Download PDFInfo
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- CN110022262A CN110022262A CN201810019109.8A CN201810019109A CN110022262A CN 110022262 A CN110022262 A CN 110022262A CN 201810019109 A CN201810019109 A CN 201810019109A CN 110022262 A CN110022262 A CN 110022262A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000013507 mapping Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 6
- 239000011800 void material Substances 0.000 claims description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/08—Learning-based routing, e.g. using neural networks or artificial intelligence
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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Abstract
The invention discloses a kind of methods for realizing planar separation based on SDN network, including: SDN controller issues ARP message flow table and ip message flow table between customer router CE and virtual router vRouter to openflow interchanger, establishes the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control flow；The vRouter obtains the ARP information and routing iinformation of each CE, and the ARP information and routing iinformation are sent to the SDN controller, instructs the SDN controller to openflow interchanger issuing service data stream list；The SDN controller issues ARP request flow table and business datum flow table between each CE to the openflow interchanger according to the ARP information and the routing iinformation, establishes the virtual service data link between each CE；The virtual service data link is used for transmission business datum message.Through the invention, the decoupling of network data forwarding surface and route test face is realized, the access device of network is merely responsible for data forwarding, improves the performance and stability of equipment.
Description
Technical field
The present invention relates to the communications fields SDN, and in particular to a method of planar separation is realized based on SDN network.This hair
It is bright at the same be related to it is a kind of based on SDN network realize planar separation system and a kind of dress based on SDN network implementations planar separation
It sets.
Background technique
MPLS VPN is a kind of IP-VPN based on MPLS technology, is in network routing and switching equipment using MPLS
Technology simplifies the Route Selection mode of core router, virtual using the IP for combining the label switched of traditional routing technology to realize
Dedicated network (IP VPN), can be used to Intranet, Extranet of structural wideband, meet a variety of flexible business demands.
Whether MPLS VPN participates in VPN routing according to PE (Provider Edge Router, backbone edges router)
Processing is subdivided into two-layer VPN and three-layer VPN.L2VPN/L3VPN be responsible for the business datum of user from user side access into
Come, data are then packaged into MPLS message and are entered on the tunnel MPLS of binding, correspondent network are transferred to, then in opposite end
MPLS message unpacks on the network equipment, is output on the outgoing interface of L2VPN/L3VPN, is transferred to the user of the other end.MPLS is
Layer protocol is carried, L2VPN is the application layer protocol for handling two layer message, and L3VPN is the application layer protocol for handling three-tier message.
In order to realize three layers between user network interconnection in traditional IP, usually realized by MPLS L3VPN technology
The normal interaction of routing iinformation between user branch, user data safe transmission between each website by VPN mode.Such as Fig. 1
It is shown, pe router, pe router and client CE (Custom Edge Router, user's network edge road are disposed in network edge
By device) between by MP-BGP notice routing and distributed by BGP or the notice routing of other IGP Routing Protocols, between pe router
The L3VPN of private network tags realization MPLS.
In above scheme, not only service fulfillment and maintenance are more complicated, and set since pe router had both done route test
It is standby, and the data forwarding task between user network is undertaken, routing function and forwarding capability all may be to Internet resources and router
System resources consumption is larger, there is certain challenge to the performance and stability of pe router.
Summary of the invention
The present invention provides a kind of method for realizing planar separation based on SDN network, to solve existing legacy user's IP network
Across backbone network interconnection, the coupling of route learning problem and access device forwarding capability and routing function between user network
Performance, the problem of stability and scalability difference caused by property.
The present invention provides a kind of method for realizing planar separation based on SDN network, comprising:
SDN controller issues between customer router CE and virtual router vRouter to openflow interchanger
ARP message flow table and ip message flow table, establish the virtual controlling link between CE and vRouter；The virtual controlling link is used
Flow is controlled in transmission；
The vRouter obtains the ARP information and routing iinformation of each CE, and by the ARP information and routing iinformation
It is sent to the SDN controller, instructs the SDN controller to openflow interchanger issuing service data stream list；
The SDN controller issues respectively according to the ARP information and the routing iinformation to the openflow interchanger
ARP request flow table and business datum flow table between CE, establish the virtual service data link between each CE；The void
Quasi- business datum link is used for transmission business datum message.
Preferably, the control flow includes at least: Routing Protocol and ARP protocol；
Preferably, the ARP information includes at least: IP address, MAC Address and the address IP of the side CE and MAC Address
Mapping relations.
Preferably, the business datum flow table is issued based on matching user's network segment, or, based on matching next-hop purpose
MAC Address issues.
Preferably, the vRouter obtains the routing iinformation by installation routing engine, or, being obtained by typing mode
Take the routing iinformation.
Preferably, establishing a vRouter for each user, the vRouter is deployed in mutually isolated container,
Route test is provided for each user, the container accesses network by OVS.
The present invention also provides a kind of systems for realizing planar separation based on SDN network, comprising: SDN controller,
Openflow interchanger, customer router CE further include virtual router vRouter, wherein
The SDN controller be used to issue to openflow interchanger ARP message flow table between CE and vRouter and
Ip message flow table establishes the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control stream
Amount；
The vRouter is used to obtain the ARP information and routing iinformation of each CE, and by the ARP information and routing
Information is sent to the SDN controller, instructs the SDN controller to openflow interchanger issuing service data stream list；
The SDN controller is also used to be issued according to the ARP information and routing iinformation to the openflow interchanger
ARP request flow table and business datum flow table between each CE, establish the virtual service data link between each CE；It is described
Virtual service data link is used for transmission business datum message.
Preferably, the control flow includes at least: Routing Protocol and ARP protocol；
Preferably, the ARP information includes at least: IP address, MAC Address and the address IP of the side CE and MAC Address
Mapping relations.
Preferably, the business datum flow table is issued based on matching user's network segment, or, based on matching next-hop purpose
MAC Address issues.
Preferably, the vRouter is also used to obtain the routing iinformation by installation routing engine, or, passing through typing
Mode obtains the routing iinformation.
Preferably, the vRouter is deployed in mutually isolated container, route test is provided for each user, it is described
Container accesses network, one vRouter example of each user by OVS.
The present invention also provides a kind of devices that planar separation is realized based on SDN network, comprising:
Acquiring unit, for issuing customer router CE and virtual router to openflow interchanger when SDN controller
ARP message flow table and ip message flow table between vRouter, are established after the virtual controlling link between CE and vRouter,
Obtain the ARP information and routing iinformation of each CE；
Transmission unit instructs the SDN for the ARP information and routing iinformation to be sent to the SDN controller
Controller issues ARP request flow table and business datum flow table between each CE to openflow interchanger, establish each CE it
Between virtual service data link.
Preferably, the control flow includes at least: Routing Protocol and ARP protocol；
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping of MAC Address are closed
System.
Compared with prior art, the invention has the following advantages that
Using method of the invention, by route test function, separating treatment is come out from access device, it is made only to be responsible for number
According to forwarding, the performance and stability of equipment are improved, reduce the complexity of service fulfillment and maintenance.Through the invention, net is realized
The decoupling in network data forwarding face and route test face, the access device of user network are not reconfigured any route test function, only
It is responsible for data forwarding, improves the performance and stability of equipment, reduces the complexity of service fulfillment and maintenance, pass through the void of definition
Quasi- router is docked with user network, is responsible for route test specially, is improved the scalability of whole network.
Detailed description of the invention
Fig. 1 is the schematic diagrames of three layers of interconnection between user network in the prior art；
Fig. 2 is a kind of method flow diagram that planar separation is realized based on SDN network provided by the invention；
Fig. 3 is a kind of a kind of structural schematic diagram of implementation of vRouter provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of system that planar separation is realized based on SDN network provided by the invention；
Fig. 5 is a kind of structural representation of embodiment that planar separation is realized based on SDN network provided in an embodiment of the present invention
Figure.
Specific embodiment
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But the present invention can
Implemented with being much different from other way described herein, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
The application is mainly used in SDN, and the core technology of SDN is Openflow agreement, and Openflow agreement operates in
On the physical network of SDN, SDN physical network includes a SDN controller and multiple Openflow interchangers.The following are relate to
And the technical term arrived:
CE:CustomerEdg, customer edge, the user terminal router that service provider is connected.Ce router
By connecting one or more pe routers, service access is provided for user.Ce router is usually an ip router, it
Syntople is established with the pe router of connection.Ce router has interface to be directly connected with service provider, can be routing
Device is also possible to interchanger etc..CE is perceived less than existing for VPN.
PE:ProviderEdge, the i.e. edge device of Provide, the edge router of service provider backbone, it
It is equivalent to tag edge router (LER).Pe router connects ce router and P router, is most important network node.
The flow of user flows into user network by pe router, or flows to MPLS backbone network by PE router.
MPLS:Multi-Protocol Label Switching, multiprotocol label are handed over, and are the IP high speed bones of a new generation
Dry network exchange standard.MPLS carries out data forwarding using label (label).It to be its point when grouping enters network
Short label with regular length, and label is packaged together with grouping, in entire repeating process, switching node only root
It is forwarded according to label.MPLS is independently of second and third layer protocol, such as ATM and IP.It provides a kind of mode, by IP
Address of cache is the simple label with regular length, for different packet forwardings and packet technology.It is existing route
With the interface of exchange agreement.
SDN:Software Defined Networking, i.e. software defined network, one kind relative to traditional network
The new network framework of innovation, it is intended to realize the data plane for making the network equipment and control being completely separated for plane；
OpenFlow: a kind of network communication protocol belongs to data link layer, can control network switch or router
Transfer plane, change the network path walked of network packet whereby.OpenFlow allows from remote control network exchanger
Data packet transfer table, by newly-increased, modification with remove data packet control rule and action, to change the road of data packet transfer
Diameter.Flow table rule can be matched based on the priority of packet content and setting flow table.
OpenFlow interchanger: it supports the forwarding interchanger of OpenFlow agreement, belongs to a kind of form of SDN network element.Branch
The network equipment of standard OpenFlow forwarding is held, controller is supported to issue flow table configuration.Vxlan interface is supported simultaneously, with tradition
Network equipment connection.Forwarding behavior is executed by the flow table rule that controller issues.It can also mutually be communicated between respective switch
Letter.
SDN controller: the control unit interacted with SDN network elements such as OpenFlow interchangers, single or multiple controls
Device composition control plane.Centralized control is carried out to network, issues flow table to each interchanger, and manage concentratedly on each interchanger
Flow table is to realize the centralized management of whole network.
OpenFlow flow table: OpenFlow controls OpenFlow interchanger by flow table, and flow table passes through matching message content
The rule for defining the movement of switch processes data message is held after data message is matched to a plurality of flow table by the way that priority is arranged
The Message processing movement that row high priority is formulated.
ARP (Address Resolution Protocol, address resolution protocol): one is located in ICP/IP protocol stack
Lower layer protocol, be responsible for some IP address being parsed into corresponding MAC Address.
BGP: common IP routing protocol, for noticing routing between different routers.
VLAN: business is isolated in a double layer network by virtual LAN.
The abbreviation of OFS:OpenFlow Switch.
Docker container: Docker container is the application container engine of an open source, allows developer that can be packaged theirs
Using and rely on packet into a transplantable container, be then published on the Linux machine of any prevalence, can also be real
Now virtualize.
The present invention realizes that forwarding face data turns by the virtual router networking component vRouter of one control plane of definition
Hair and the decoupling of control plane route learning.VRouter can have two aspect functions by different realizations, first is that from user side router
Study routing and declaration routing iinformation, make user side router dynamic learning to routing；Second is that vRouter is by being collected into
Routing iinformation and ARP information, instruct SDN controller to issue flow table to the openflow interchanger of SDN network, realize equipment
Route test face function, and PE equipment is only used to data forwarding, does not run any Routing Protocol.The present invention relates to two kinds of void
Quasi- link: control link and service link, wherein control link runs Routing Protocol, is between CE<->VRouter；Industry
The road Wu Lian runs user service data message, be between CE<->CE, forwarded by VRouter.Below in conjunction with
The scheme of the embodiment of the present application is described in detail in attached drawing.
It is a kind of method stream that planar separation is realized based on SDN network of the present invention refering to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, Fig. 2
Cheng Tu；Fig. 3 is a kind of structural schematic diagram of implementation of vRouter in the embodiment of the present invention；Fig. 4 is a kind of base of the present invention
The structural schematic diagram of the system of planar separation is realized in SDN network；Fig. 5 is that this is a kind of based on SDN network realization planar separation
A kind of structural schematic diagram of embodiment；
The present invention needs to create a virtual router vRouter for each user, is used for centralized control router CE
Practise and issue routing iinformation and ARP information；Preferably, the study and publication of CE is concentrated, specifically: from a CE study to road
By information and ARP information, and it is published to another CE, this is the function of a user network route learning.
To realize user isolation, vRouter can be deployed in mutually isolated container, provide routing for each user
Control.
Preferably, container can be docker container.Docker is the application container engine of an open source, so we
It can be packaged in our vRouter to transplantable containers, then be published on server and realize virtualization.Container
It is not have any interface between each other using sandbox mechanism completely.Long-range API can be used to manage and create in we
Docker container.Docker container is created by Docker mirror image.The relationship of container and mirror image is similar to Object-Oriented Programming
In object and class.
We can be each vRouter one Docker example of foundation.Docker core solves the problems, such as it is to utilize
LXC realizes the function of similar VM, to be supplied to the more computing resources of user using the hardware resource more saved.
Docker container is equivalent to an independent network and connects virtual interface on server by interface with OVS.
Docker container accesses network by OVS.
Preferably, vRouter can independently be disposed on the server, also can integrate in SDN controller, if it is
In the case of independent deployment, SDN controller needs to provide routing iinformation of the api interface to receive vRouter.The vRouter
The routing iinformation and ARP information of user are sent to the SDN and controlled by the api interface provided by the SDN controller
Device processed.If be integrated in the case of SDN controller, it is integrated into controller and means the function for being vRouter in SDN controller
Can, so there is no need to individually define the role of a vRouter.
It is illustrated, is please referred to shown in Fig. 3 below with reference to an example, such as there are two users, respectively two
User respectively creates virtual router a vRouter1 and vRouter2, and vRouter1 and vRouter2 are deployed in two respectively
It is two users for route test in a container.As shown in figure 5, SDN includes two forwarding devices: OFS-1 and OFS-2；
The port1 of the eth1 and user terminal router CE1 of vRouter1 are interconnected in logic, eth2 and the user terminal routing of vRouter1
The port2 of device CE2 is interconnected in logic.The routing iinformation of CE1 is 10.1.0.0/16, and the ip of access interface port1 is
169.254.1.1 MAC Address is 00:00:00:00:00:01；The routing iinformation of CE2 is 10.2.0.0/16, access interface
Ip in port2 is 169.254.2.2, and MAC Address is 00:00:00:00:00:02.
The present invention is based on the methods that SDN network realizes planar separation, specifically includes the following steps:
Step S101, SDN controller to openflow interchanger issue ARP message flow table between CE and vRouter and
Ip message flow table establishes the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control stream
Amount；
Preferably, the ARP message flow table and ip message flow table between CE and vRouter include: the ARP of CE to vRouter
The ARP message flow table of message flow table and vRouter to CE, specific as follows:
Preferably, being included at least in the ARP message flow table of CE to vRouter: matching field and action field, described
It include the addresses ip that CE incoming end slogan, source and destination are respectively CE and vRouter with field, the action field is movement
It is the vlan for stamping vRouter, is sent to vRouter.
Preferably, being included at least in the ARP message flow table of vRouter to CE: matching field and action field, described
It include the addresses ip that vRouter incoming end slogan, source and destination are respectively vRouter and CE with field, the action field is
Movement is to remove vlan, is sent to CE.
Preferably, being included at least in the ip message flow table of CE to vRouter: matching field and action field, the matching
Field includes that CE incoming end slogan, source and destination are the address ip of CE and vRouter respectively, and the action field is that movement is
The vlan for stamping vRouter, is sent to vRouter.
Preferably, being included at least in the ip message flow table of vRouter to CE: matching field and action field, the matching
It is the address ip of vRouter and CE respectively that field, which includes vRouter incoming end slogan, source and destination, and the action field is
Work is to remove vlan, is sent to CE.
Preferably, the control flow includes at least: Routing Protocol and ARP protocol.
Preferably, the routing protocol packet between CE and vRouter wants intercommunication, it is necessary to have two class flow tables, one kind is ARP
Flow table, one kind are the ip message flow tables that transmission route agreement uses, and Routing Protocol is packaged into ip message and is communicated.
Preferably, SDN controller issues the ARP message flow table between CE and vRouter to openflow interchanger, it is complete
At the ARP intercommunication between CE and vRouter, the vRouter obtains the ARP information of each CE, and the vRouter passes through
The ARP information of the CE is transferred to SDN controller by related API, and the SDN controller issues CE to openflow interchanger
To the ip message flow table of vRouter, guarantee that ip flow is reachable between CE and vRouter, can establish connection.
Step S102, the described vRouter obtains the routing iinformation and ARP information of each CE, and by the routing iinformation
It is sent to the SDN controller with ARP information, instructs the SDN controller to openflow interchanger issuing service data flow
Table；
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping of MAC Address are closed
System；
As shown in figure 3, the routing iinformation and ARP of vRouter can be obtained by installation routing engine, can also pass through
Api interface receiving is externally provided to be manually entered.VRouter with SDN controller is connected, and SDN controller needs to provide api interface,
The routing iinformation and ARP information of vRouter notice are received, and is that openflow interchanger issues flow table as guidance.
The vRouter obtains the routing iinformation and ARP information that the CE is sent by installing routing engine, this
When vRouter have route learning and issuing function.Routing engine can be some open sources that may operate on service area or
The non-open source of person, the software of related Routing Protocol, such as goBGP can be run, it can be as conventional router one and use by it
The router interaction routing iinformation at family.
Preferably, the vRouter obtains the routing iinformation of each CE and ARP information can be by way of EBPP
It realizes.VRouter learns to the routing iinformation and ARP information on CE1 and CE2, and declares routing iinformation, make user's dypass by
Device CE dynamic learning is to routing iinformation.VRouter learns from a CE to routing and be published to another routing.Between CE
Mutual user's route learning is completed by the vRouter, specifically: vRouter from CE study to routing iinformation and
ARP information, and it is published to another CE.In example as shown in Figure 5 of illustrating, vRouter learns 10.1.0.0/16 net from CE1
The routing of section, and it is published to CE2, from CE2 study to the routing of 10.2.0.0/16 network segment, and it is published to CE1.Due to
The not responsible service traffics of vRouter, so vRouter needs the exporting policy control modification by BGP when issuing routing iinformation
Lead path by next-hop be the outlet IP of the corresponding CE equipment of network where routing network segment, and vRouter oneself cannot be specified
The IP address being connect with opposite end.
Preferably, the vRouter obtains the routing iinformation of each CE and ARP information can be by static craft
The mode of typing is realized.If realizing vRouter function by the way of static manual typing.Under static mode,
VRouter does not have route learning and issuing function, user CE equipment by user configuration static routing, vRouter it is upper also by
The mode typing user network routing being manually entered, each CE equipment and vRouter still have straight chain in logic, but this
In the case of be no longer used to learn and issue routing iinformation, but in order to which vRouter can be got and each CE by ARP request
The mac address information of straight chain IP, i.e. the same with using EBGP mode on such vRouter, there are the routing of each user network letters
Breath and ARP information, pass to SDN controller by the api interface that SDN controller provides for routing iinformation and ARP information,
SDN controller can issue whole flow tables to openflow interchanger OFS-1 and OFS-2, as indicated above.Such case
Under, the major function of vRouter is that controller is instructed to issue forwarding flow table for openflow interchanger.
The mode of route test of the embodiment of the present invention is illustrated in a manner of EBGP and static state, but is not limited to both sides
Formula, for example, using IGP agreement also may be implemented or vRouter can also by access network in a physical router
It realizes.Otherwise realize that the mode of route test is within the scope of the present invention.
It is illustrated again with Fig. 5, Fig. 5 is that two routings CE1, CE2 of same user pass through openflow interchanger OFS- respectively
1, OFS-2 accesses backbone network, and SDN controller passes through these interchangers of openflow consultative management OFS-1, OFS-2, vRouter
A virtual controlling link is respectively established between CE1, CE2 equipment, for the interconnection between vRouter and CE, the virtual controlling
Only forwarding Routing Protocol, ARP protocol etc. control flow for chain road, do not undertake the forwarding of service traffics.
It is connected preferably, CE can establish EBGP with vRouter, routing iinformation is mutually issued by bgp protocol.
Routing iinformation is mainly exactly the main information of the next-hop needed to a purpose:
R1Routing Table:
10.1.0.0/16next-hop 169.254.1.1
10.2.0.0/16next-hop 169.254.2.1
ARP information is the mapping relations of IP and MAC；
R1ARP Table:
169.254.1.1 00:00:00:00:00:01
169.254.2.1 00:00:00:00:00:02
The virtual controlling link of foundation is the Link1 in Fig. 4, and SDN controller, which needs to issue CE1 to interchanger OFS-1, to be arrived
The ARP message flow table of vRouter and the ARP message flow table of vRouter to CE1 guarantee the ARP report between CE1 and vRouter
Text can be transmitted to other side, which specifically includes the following contents:
Entry1:
" in_port=p3, arp, arp_spa=169.254.1.1, arp_tpa=169.254.1.2, actions=
set_field:100->vl an_vid,output:p5"
The concrete meaning of Entry1 flow table are as follows: from the received arp message of CE1 access interface, source and destination is respectively for matching
The address ip of CE1 and vrouter, movement are the vlan for stamping vrouter, are sent to vrouter.
Entry2:
" in_port=p5, dl_vlan=100, arp, arp_spa=169.254.1.2, arp_tpa=
169.254.1.1 actions=strip_vlan, output:p3 "
The concrete meaning of Entry2 flow table are as follows: the arp message that matching is received from vrouter, source and destination are respectively
The address ip of vrouter and CE1, after removing vlan, is sent to CE1.
After vRouter obtains the ARP of user side ip, the ip message flow table of CE to vRouter and vRouter to CE is issued,
Guarantee that ip flow is reachable between CE and vRouter, can establish EBGP connection, ip message flow table specifically includes the following contents:
Entry3:
" in_port=p3, ip, nw_src=169.254.1.1, nw_dst=169.254.1.2, actions=
set_field:100->vlan_vid,output:p5"
The concrete meaning of Entry3 flow table are as follows: the ip message that is received from CE1 of matching, source and destination be respectively CE1 and
The address ip of vrouter acts to be sent to vrouter after stamping the vlan of vrouter.
Entry4:
" in_port=p5, dl_vlan=100, ip, nw_src=169.254.1.2, nw_dst=169.254.1.1,
Actions=strip_vlan, output:p3 "
The concrete meaning of Entry4 flow table are as follows: matching is sent to the ip message of CE1 from vrouter, and source and destination is respectively
The address ip of vrouter and CE1, after acting to remove vlan, is sent to CE1.
Virtual controlling link establishment between CE1 and vRouter is got up.The virtual controlling link of foundation is in Fig. 5
Link2, SDN controller need to issue interchanger OFS-2 the ARP message flow table between CE2 and vRouter, guarantee CE2 and
ARP message between vRouter can be transmitted to other side.ARP message flow table between the CE2 and vRouter with it is aforementioned
Entry1-Entry2 is similar, repeats no more.SDN controller needs to issue between CE2 and vRouter interchanger OFS-2
Ip message flow table guarantees that the flow between CE2 and vRouter is reachable, establishes EBPG connection.Between the CE2 and vRouter
Ip message flow table is similar with aforementioned Entry3-Entry4, repeats no more.
Virtual controlling link establishment between CE2 and vRouter is got up.
Ce1 and ce2 controls flow by the virtual controlling link transmission Routing Protocol and ARP protocol etc..
Mutual user's route learning is completed between CE by the vRouter, specifically: vRouter is from a CE
Routing iinformation and ARP information are practised, and is published to another CE.In example as shown in Figure 5 of illustrating, vRouter is from CE1
The routing of 10.1.0.0/16 network segment is practised, and is published to CE2, from CE2 study to the routing of 10.2.0.0/16 network segment, and is issued
To CE1.VRouter learns to the routing iinformation and ARP information on CE1 and CE2.Due to the not responsible service traffics of vRouter,
So vRouter needed when issuing routing iinformation by the exporting policy of BGP control modification lead path by next-hop be routing
The outlet IP of the corresponding CE equipment of network where network segment, and the IP address that vRouter oneself cannot be specified to connect with opposite end.Institute
With vRouter when to the routing of CE2 publication 10.1.0.0/16 network segment, next-hop is revised as 169.254.1.1, rather than
169.254.2.2；Similarly, when to the routing of CE1 publication 10.2.0.0/16 network segment, next-hop is revised as vRouter
169.254.2.1 rather than 169.254.1.2.Routing: 10.2.0.0/16 next-hop is acquired on CE1 in this way
169.254.2.1, routing: 10.1.0.0/16next-hop 169.254.1.1 is acquired on CE2.For example, if vRouter is adopted
Route test is realized with EBGP mode, interconnects the ARP message flow table (Entry1-of ip between CE and vRouter by issuing
Entry2) and ip message flow table (Entry3-Entry4), CE can establish EBGP with vRouter and connect, realize CE and
Control flow intercommunication between vRouter passes through EBGP agreement automatic interaction routing iinformation.
Step S103, the described SDN controller is according to the ARP information and routing iinformation to the openflow interchanger
The ARP request flow table and business datum flow table between each CE are issued, the virtual service data link between each CE is established, it is described
Virtual service data link is used for transmission business datum message.
Preferably, passing through the virtual service data link transmission business datum message between each CE.
Preferably, the SDN controller according in the ARP information MAC Address and routing iinformation to described
Openflow interchanger issues the ARP request flow table between each CE.
Preferably, the business datum flow table is issued based on matching user's network segment, or, based on matching next-hop purpose
MAC Address issues.
Preferably, SDN controller issues the ARP request flow table between each CE to openflow interchanger, complete each CE it
Between ARP intercommunication, CE1 obtain CE2 ARP information, CE2 obtain CE1 ARP information；The ARP information includes at least: the side CE
IP address, MAC Address and IP address and MAC Address mapping relations.The SDN controller is to openflow interchanger
Issue the business datum flow table between each CE, the forwarding for service traffics between CE.
Preferably, being included at least in the ARP request flow table of CE1 to CE2: matching field and action field, the matching word
Section includes the ARP request message that matching is sent to CE2 from CE1, and source and destination is respectively the address ip of CE1 to CE2, is acted to beat
After the upper vlan for arriving CE2, it is sent to CE2.
Preferably, being included at least in the ARP request flow table of CE2 to CE1: matching field and action field, the matching word
Section includes the arp message that matching is sent to CE1 from OFS-2, and source and destination is respectively the address ip of CE2 and CE1, and movement is to remove
After vlan, it is sent to CE1.
It is included at least preferably, being issued in the business datum flow table of flow table CE1 to CE2 based on matching user's network segment: matching
Field and action field, the matching field include: the ip message that matching is sent to CE2 from CE1, and destination address is the connect use of CE2
The address network segment ip of family network segment, action field include: after movement is the vlan for stamping CE2, to be sent to OFS-2.
It is included at least preferably, being issued in the business datum flow table of flow table CE2 to CE1 based on matching user's network segment: matching
Field and action field, the matching field include matching the ip message that CE1 is sent to from OFS-2, it is therefore an objective to the use that CE1 is connect
The address network segment ip of family network segment, action field include: that movement is after removing vlan, to be sent to CE1.
Preferably, the MAC Address based on matching next-hop purpose issues in the business datum flow table of flow table CE1 to CE2 extremely
It less include: matching field and action field, the matching field includes: the message that matching is received from CE1, and the address mac is CE2
The MAC Address of interface, action field include: after movement is the vlan for stamping CE2, to be sent to CE2.
Preferably, the MAC Address based on matching next-hop purpose issues in the business datum flow table of flow table CE2 to CE1 extremely
It less include: matching field and action field, the matching field includes: the message that matching is received from OFS-2, and the address mac is
The interface mac address of CE1, action field include: that movement is after removing vlan, to be sent to CE1.
It is illustrated by taking Fig. 5 as an example again, the api interface that vRouter is provided by SDN controller routes user
Information and ARP information pass to SDN controller for instructing SDN controller respectively to openflow interchanger OFS-1 and OFS-
2 issuing service data stream lists establish the virtual service data link Link3 between OFS-1 and OFS-2, instruct the OFS-1
With OFS-2 forwarding data packets；Pass through virtual service data link Link3 forwarding service data message, SDN control between CE
Device is issued to OFS-1 such as downstream table, specific as follows:
(1) SDN controller issues the ARP request flow table of CE1 to CE2 to interchanger OFS-1 and the ARP of CE2 to CE1 is asked
Flow table is sought, the ARP request of ARP request and CE2 to CE1 for CE1 to CE2:
Entry5:
" in_port=p3, arp, arp_spa=169.254.1.1, arp_tpa=169.254.2.1, actions=
set_field:300->vl an_vid,output:p5"
The concrete meaning of Entry5 flow table are as follows: matching is sent to the ARP request message of CE2 from CE1, and source and destination is respectively
The address ip of CE1 to CE2 is sent to CE2 after acting to stamp the vlan of CE2.
Entry6:
" in_port=p5, arp, dl_vlan=300, arp_spa=169.254.2.1, arp_tpa=
169.254.1.1 actions=strip_vlan, output:p3 "
The concrete meaning of Entry6 flow table are as follows: matching is sent to the arp message of CE1 from OFS-2, and source and destination is respectively CE2
With the address ip of CE1, movement is after removing vlan, to be sent to CE1.
(2) SDN controller gives interchanger OFS-1 issuing service data stream list, forwards for the service traffics between CE,
The virtual service data link between the ce1 and ce2 is established, passes through the virtual service data link between ce1 and ce2
Transmission services data message.
Preferably, flow table can be issued based on matching user's network segment, flow table can also be issued based on purpose mac.
It is illustrated below for flow table is issued based on matching user's network segment:
Entry7:
" in_port=p3, nw_dst=10.2.0.0/16, actions=set_field:300- > vlan_vid,
output:p5"
The concrete meaning of Entry7 flow table are as follows: matching is sent to the ip message of CE2 from CE1, and destination address is the connect use of CE2
The address network segment ip of family network segment is sent to OFS-2 after acting to stamp the vlan of CE2.
Entry8:
" in_port=p5, dl_vlan=300, nw_dst=10.1.0.0/16, actions=strip_vlan,
output:p3"
The concrete meaning of Entry8 flow table are as follows: matching is sent to the ip message of CE1 from OFS-2, it is therefore an objective to the use that CE1 is connect
The address network segment ip of family network segment, after acting to remove vlan, is sent to CE1.
It is illustrated below for flow table is issued based on matching next-hop target MAC (Media Access Control) address:
Entry9:
" in_port=p3,
Eth_dst=00:00:00:00:00:02, actions=set_field:300- > vlan_vid, output:
p5"
The concrete meaning of Entry9 flow table are as follows: the matching message that receives from CE1, the address mac are the MAC of CE2 interface
Location is sent to CE2 after acting to stamp the vlan of CE2；
Entry10:
" in_port=p5, dl_vlan=300, eth_dst=00:00:00:00:00:01, actions=strip_
vlan,output:p3"
The concrete meaning of Entry10 flow table are as follows: the message that matching is received from OFS-2, the address mac are the interface MAC of CE1
Address after acting to remove vlan, is sent to CE1.
Entry7, Entry8 are according to the flow table forwarded under routing iinformation according to network segment, and Entry9, Entry10 are roots
According to the flow table forwarded according to opposite end purpose MAC under MAC Address.
Entry9,10 are advantageous in that number of the flow table number based on purpose MAC only with CE node has relative to 7,8
It closes, and it is unrelated with how many private network network segment of network that each CE is connected, largely reduce flow table number；And due to
Business forwarding flow table is not related to routing network segment information, and when the variation of user side routing iinformation, Business Stream flow table will not change therewith
And service traffics are influenced, stability is also higher.
The present invention it is also a kind of based on SDN network realize planar separation system, not only include: SDN controller,
Openflow interchanger, customer router CE further include virtual router vRouter, wherein
The SDN controller be used to issue to openflow interchanger ARP message flow table between CE and vRouter and
Ip message flow table establishes the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control stream
Amount；
The vRouter is used to obtain the ARP information and routing iinformation of each CE, and by the ARP information and routing
Information is sent to the SDN controller, instructs the SDN controller to openflow interchanger issuing service data stream list；
The SDN controller is also used to be issued according to the ARP information and routing iinformation to the openflow interchanger
ARP request flow table and business datum flow table between each CE, establish the virtual service data link between each CE；It is described
Virtual service data link is used for transmission business datum message.
Preferably, the control flow includes at least: Routing Protocol and ARP protocol.
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping of MAC Address are closed
System；
Preferably, the business datum flow table is issued based on matching user's network segment, or, based on matching next-hop purpose
MAC Address issues.
Preferably, the vRouter is also used to obtain the routing iinformation by installation routing engine, or, passing through typing
Mode obtains the routing iinformation.
Preferably, the vRouter is deployed in mutually isolated container, route test is provided for each user, it is described
Container accesses network, one vRouter example of each user by OVS.
The present invention also provides a kind of device for realizing planar separation based on SDN network, the device in the present embodiment is virtual
Router vRouter, comprising:
Acquiring unit, for issuing customer router CE and virtual router to openflow interchanger when SDN controller
ARP message flow table and ip message flow table between vRouter, are established after the virtual controlling link between CE and vRouter,
Obtain the ARP information and routing iinformation of each CE；
Transmission unit instructs the SDN for the ARP information and routing iinformation to be sent to the SDN controller
Controller issues ARP request flow table and business datum flow table between each CE to openflow interchanger, establish each CE it
Between virtual service data link；
Preferably, the control flow includes at least: Routing Protocol and ARP protocol.
Preferably, the ARP at least information includes: IP address, MAC Address and the address IP and the MAC Address of the side CE
Mapping relations.
The scheme of the application has good scalability simultaneously, and either user network increases user's network segment, or newly-increased
Network node, vRouter can be automatically performed the study for issuing and routing of flow table, without influencing existing business.
The method provided through the invention realizes the decoupling of network data forwarding surface and route test face, user network
Access device be not reconfigured any route test function, only responsible data forwarding, improves the performance and stability of equipment, drop
The complexity of low service fulfillment and maintenance is docked by the virtual router of definition with user network, is responsible for routing control specially
System, improves the scalability of whole network.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore guarantor of the invention
Shield range should be subject to the range that the claims in the present invention are defined.
Claims (12)
1. a kind of method for realizing planar separation based on SDN network characterized by comprising
SDN controller issues the ARP message between customer router CE and virtual router vRouter to openflow interchanger
Flow table and ip message flow table, establish the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control
Flow processed；
The vRouter obtains the ARP information and routing iinformation of each CE, and the ARP information and routing iinformation are sent
To the SDN controller, instruct the SDN controller to openflow interchanger issuing service data stream list；
The SDN controller according to the ARP information and the routing iinformation to the openflow interchanger issue each CE it
Between ARP request flow table and business datum flow table, establish the virtual service data link between each CE；The virtual service
Data link is used for transmission business datum message.
2. the method as described in claim 1, which is characterized in that the control flow includes at least: Routing Protocol and ARP association
View；
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping relations of MAC Address.
3. the method as described in claim 1, which is characterized in that the business datum flow table is based under matching user's network segment
Hair, or, being issued based on matching next-hop target MAC (Media Access Control) address.
4. the method as described in claim 1, which is characterized in that the vRouter obtains the road by installation routing engine
By information, or, obtaining the routing iinformation by typing mode.
5. the method as described in claim 1, it is characterised in that:
A vRouter is established for each user, the vRouter is deployed in mutually isolated container, is mentioned for each user
For route test, the container accesses network by OVS.
6. a kind of system for realizing planar separation based on SDN network, comprising: SDN controller, openflow interchanger, Yong Hulu
By device CE, which is characterized in that further include virtual router vRouter, wherein
The SDN controller is used to issue the ARP message flow table and ip message between CE and vRouter to openflow interchanger
Flow table establishes the virtual controlling link between CE and vRouter；The virtual controlling link is used for transmission control flow；
The vRouter is used to obtain the ARP information and routing iinformation of each CE, and by the ARP information and routing iinformation
It is sent to the SDN controller, instructs the SDN controller to openflow interchanger issuing service data stream list；
The SDN controller is also used to issue each CE to the openflow interchanger according to the ARP information and routing iinformation
Between ARP request flow table and business datum flow table, establish the virtual service data link between each CE；The virtual industry
Business data link is used for transmission business datum message.
7. system as claimed in claim 6, which is characterized in that the control flow includes at least: Routing Protocol and ARP association
View；
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping relations of MAC Address.
8. system as claimed in claim 6, which is characterized in that the business datum flow table is based under matching user's network segment
Hair, or, being issued based on matching next-hop target MAC (Media Access Control) address.
9. system as claimed in claim 6, which is characterized in that the vRouter is also used to obtain by installation routing engine
The routing iinformation, or, obtaining the routing iinformation by typing mode.
10. system as claimed in claim 6, it is characterised in that:
The vRouter is deployed in mutually isolated container, provides route test for each user, the container passes through OVS
Access network, one vRouter example of each user.
11. a kind of device for realizing planar separation based on SDN network characterized by comprising
Acquiring unit, for issuing customer router CE and virtual router to openflow interchanger when SDN controller
ARP message flow table and ip message flow table between vRouter, establish after the virtual controlling link between CE and vRouter, obtain
Take the ARP information and routing iinformation of each CE；
Transmission unit instructs the SDN controller for the ARP information and routing iinformation to be sent to the SDN controller
ARP request flow table and business datum flow table between each CE are issued to openflow interchanger, establishes the void between each CE
Quasi- business datum link.
12. device as claimed in claim 11, which is characterized in that the control flow includes at least: Routing Protocol and ARP association
View；
The ARP information includes at least: IP address, MAC Address and the IP address of the side CE and the mapping relations of MAC Address.
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