CN103905317B - Message processing method and system for software-defined network - Google Patents
Message processing method and system for software-defined network Download PDFInfo
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- CN103905317B CN103905317B CN201210587296.2A CN201210587296A CN103905317B CN 103905317 B CN103905317 B CN 103905317B CN 201210587296 A CN201210587296 A CN 201210587296A CN 103905317 B CN103905317 B CN 103905317B
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Abstract
The invention discloses a message processing method for a software-defined network. A controller issues an ARP flow table for ARP responses to a source interchanger; the source interchanger returns ARP response messages to a source virtual machine according to the ARP flow table; the source virtual machine sends service messages to the source interchanger; the source interchanger uploads the service messages to the controller; the controller issues an MAC address service flow table with a target MAC address as a target interchanger to other interchangers excepts the target interchanger; a service flow table with the target MAC address as the MAC address of the target virtual machine is issued to the target interchanger; the source interchanger forwards the service messages according to the service flow table; the target interchanger forwards the service messages to the target virtual machine. The invention further discloses a message processing system for the software-defined network. Through the scheme of the message processing method and system for the software-defined network, maintenance expenses on the ARP flow table by the source interchanger can be reduced.
Description
Technical field
The present invention relates to Message processing technology, more particularly to a kind of message processing method of software defined network (SDN) and
System.
Background technology
In SDN, when source switch (switch) receives address resolution protocol (ARP, AddressResolution
Protocol) after request message, can as needed on be sent to controller (controller) and processed, or directly by source
Switch replys arp reply message.If source switch goes to carry out the response of ARP request message using the mode that flow table is matched,
So need the more ARP flow tables of on-board maintenance to be exchanged in source, and these ARP flow tables need to carry out together with the flow table on controller
The operations such as step, renewal, each of which increases the complexity and source switch of source switch for the maintenance costs of ARP flow tables.
The content of the invention
In view of this, present invention is primarily targeted at providing a kind of message processing method of software defined network and being
System, reduces source switch for the maintenance costs of ARP flow tables.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that：
A kind of message processing method of software defined network that the present invention is provided, the method include：
Controller issues the ARP flow tables for arp reply to source switch；
After source switch receives the ARP request message of source virtual machine, replied to source virtual machine according to the ARP flow tables
Arp reply message；
Source virtual machine sends service message to source switch；
Service message is uploaded to controller by source switch；
Purpose media access control (MAC) the address modification of the service message of business flow list is purpose switch by controller
MAC Address, be handed down to the switch in addition to purpose switch in service message transmission path；By the business report of business flow list
The target MAC (Media Access Control) address modification of text is the MAC Address of purpose virtual machine, is handed down to purpose switch；
Source switch forwards the service message according to the business flow list；The purpose switch receives the business
After message, according to business flow list by the MAC Address that the target MAC (Media Access Control) address replacement of service message is purpose virtual machine, forwarding is described
Service message is to purpose virtual machine.
In such scheme, the ARP flow tables for arp reply include matching (Match) field and perform (action)
Field, the matching field include ethernet type and ARP operation fields；The execution field is to change ARP request message
For arp reply message, and the instruction field of arp reply message is beamed back from former port.
In such scheme, after the source switch receives the ARP request message of source virtual machine, according to described for ARP
The ARP flow tables of response reply arp reply message to source virtual machine：
After source switch receives the ARP request message of source virtual machine, by the Ethernet class in the ARP request message
Type, ARP operation fields with matched for the ARP flow tables of arp reply, according to the execution field in the ARP flow tables of matching to
Source virtual machine replys arp reply message.
In such scheme, the source virtual machine sends service message and to source switch is：Source virtual machine is using receiving
Source MAC encapsulation service message in arp reply message, and the service message is sent to into source switch.
In such scheme, the method also includes：When the IP address of purpose virtual machine occurs modification, controller sends flow table
Modification message gives purpose switch, changes the purpose IP address field in the business flow list matching area of purpose switch.
A kind of message handling system of software defined network that the present invention is provided, the system include：Controller, source exchange
Machine, source virtual machine, purpose switch, purpose virtual machine；Wherein,
Controller, for the ARP flow tables for arp reply are issued to source switch；And by the service message of business flow list
Target MAC (Media Access Control) address modification for purpose switch MAC Address, be handed down in service message transmission path except purpose switch with
Outer switch；It is the MAC Address of purpose virtual machine by the target MAC (Media Access Control) address modification of the service message of business flow list, is handed down to
Purpose switch；
Source switch, for receiving after the ARP request message of source virtual machine, according to the ARP flow tables to source virtual machine
Reply arp reply message；And according to the business flow list forwarding service message；
Source virtual machine, for sending ARP request message and service message to source switch；
Purpose switch, for receiving after the service message, according to business flow list by purpose MAC of service message ground
The MAC Address for purpose virtual machine is replaced in location, forwards the service message to purpose virtual machine；
Purpose virtual machine, for receiving the service message.
In such scheme, the ARP flow tables for arp reply include matching field and perform field, the matching word
Section includes ethernet type and ARP operation fields；The execution field is that ARP request message is revised as arp reply message, and
The instruction field of arp reply message is beamed back from former port.
In such scheme, the source switch, specifically for after the ARP request message for receiving source virtual machine, by institute
State the ethernet type in ARP request message, ARP operation fields and matched for the ARP flow tables of arp reply, according to
Execution field in the ARP flow tables matched somebody with somebody replys arp reply message to source virtual machine.
In such scheme, the source virtual machine, specifically for using the source MAC in the arp reply message for receiving
Encapsulation service message, and the service message is sent to into source switch.
In such scheme, the controller is additionally operable to when the IP address of purpose virtual machine occurs modification, and controller sends
Flow table modification message gives purpose switch, changes the purpose IP address field in the business flow list matching area of purpose switch.
The invention provides the message processing method and system of a kind of software defined network, controller is issued to source switch
For the ARP flow tables of arp reply；After source switch receives the ARP request message of source virtual machine, answered for ARP according to described
The ARP flow tables answered reply arp reply message to source virtual machine；Source virtual machine sends service message to source switch；Source switch
Service message is uploaded to into controller；Controller will be exchanged for the purpose of the target MAC (Media Access Control) address modification of the service message of business flow list
The MAC Address of machine, is handed down to the switch in addition to purpose switch in service message transmission path；By the business of business flow list
The target MAC (Media Access Control) address modification of message is the MAC Address of purpose virtual machine, is handed down to purpose switch；Source switch is according to business
Flow table forwards the service message；After the purpose switch receives the service message, according to business flow list by business report
The target MAC (Media Access Control) address of text replaces the MAC Address for purpose virtual machine, forwards the service message to purpose virtual machine；Thus, energy
Enough reduce source switch for the maintenance costs of ARP flow tables.
Description of the drawings
The schematic flow sheet of the message processing method of the software defined network that Fig. 1 is provided for the present invention；
The structural representation of the message handling system of the software defined network that Fig. 2 is provided for the present invention；
Fig. 3 is the schematic flow sheet of the message processing method that the embodiment of the present invention one realizes software defined network.
Specific embodiment
The present invention basic thought be：Controller issues the ARP flow tables for arp reply to source switch；Source switch
After receiving the ARP request message of source virtual machine, replying ARP to source virtual machine according to the ARP flow tables for arp reply should
Answer message；Source virtual machine sends service message to source switch；Service message is uploaded to controller by source switch；Controller will
MAC Address of the target MAC (Media Access Control) address modification of the service message of business flow list for purpose switch, is handed down to service message transmission road
Switch on footpath in addition to purpose switch；Will be virtual for the purpose of the target MAC (Media Access Control) address modification of the service message of business flow list
The MAC Address of machine, is handed down to purpose switch；Source switch forwards the service message according to the ARP flow tables for forwarding；Institute
State after purpose switch receives the service message, the target MAC (Media Access Control) address of service message is replaced with by mesh according to business flow list
Virtual machine MAC Address, forward the service message to purpose virtual machine.
Here, the source switch is the switch being connected with source virtual machine；The purpose switch is virtual with purpose
The switch that machine is connected.
Below by drawings and the specific embodiments, the present invention is described in further detail.
The present invention realizes a kind of message processing method of software defined network, as shown in figure 1, the method include it is following
Step：
Step 101：Controller issues the ARP flow tables for arp reply to source switch；
The ARP flow tables for arp reply are：
As can be seen that the ARP flow tables for arp reply include matching (Match) field and perform (action) word
Section, the matching field include ethernet type (Eth_Type), ARP operation (ARP_OP) fields, further, the matching
Field is also included for distinguishing mark (Tenant) field of tenant；The execution field is that ARP request message is revised as ARP
Response message, and the instruction field of arp reply message is beamed back from former port, it is described that ARP request message is revised as into arp reply report
Text includes：Modification inbound port (InPort) is exit port (Output), source MAC (SourceMac) is own MAC address,
Target MAC (Media Access Control) address (DestinationMac) for ARP request message source MAC (In_ARPPacket_SourceMac),
ARP_OP=2.
Step 102：After source switch receives the ARP request message of source virtual machine, according to described for arp reply
ARP flow tables reply arp reply message to source virtual machine；
Specifically, after source switch receives the ARP request message of source virtual machine, by the ARP request message with
Too net type, ARP operation fields are matched with the ARP flow tables for arp reply, according to the execution in the ARP flow tables of matching
Field replys arp reply message to source virtual machine.
Step 103：Source virtual machine sends service message to source switch；
Specifically, source virtual machine encapsulates follow-up business report using the source MAC in the arp reply message for receiving
Text, and the service message is sent to into source switch.
Step 104：Service message is uploaded to controller by source switch；
Step 105：Controller calculates service message transmission path, by the target MAC (Media Access Control) address of the service message of business flow list
The MAC Address for purpose switch is changed, the switch in addition to purpose switch in service message transmission path is handed down to；Will
The target MAC (Media Access Control) address modification of the service message of business flow list is the MAC Address of purpose virtual machine, is handed down to purpose switch；
Step 106：Source switch forwards the service message according to business flow list；
Step 107：After the purpose switch receives the service message, according to business flow list by the mesh of service message
MAC Address replace MAC Address for purpose virtual machine, forward the service message to purpose virtual machine；
Said method also includes：When the IP address of purpose virtual machine occurs modification, controller sends flow table modification (flow
Mod) message gives purpose switch, changes the purpose IP ground in the business flow list matching area (MatchField) of purpose switch
Location field.
Based on said method, the present invention also provides a kind of message handling system of software defined network, as shown in Fig. 2 should
System includes：Controller 21, source switch 22, source virtual machine 23, purpose switch 24, purpose virtual machine 25；Wherein,
Controller 21, for the ARP flow tables for arp reply are issued to source switch 22；And calculate service message transmission
The target MAC (Media Access Control) address modification of the service message of business flow list is the MAC Address of purpose switch 24, is handed down to described by path
Switch on path in addition to purpose switch 24, for the purpose of the target MAC (Media Access Control) address modification of the service message of business flow list
The MAC Address of virtual machine 25, is handed down to purpose switch 24；
Source switch 22, for receiving after the ARP request message of source virtual machine 23, according to described for arp reply
ARP flow tables reply arp reply message to source virtual machine 23；And the service message is forwarded according to the business flow list for forwarding；
Source virtual machine 23, for sending ARP request message and service message to source switch 22；
Purpose switch 24, for receiving after the service message, according to business flow list by purpose MAC of service message
The MAC Address for purpose virtual machine is replaced in address, forwards the service message to purpose virtual machine 25；
Purpose virtual machine 25, for receiving the service message.
The source switch 22, specifically for, after the ARP request message for receiving source virtual machine 23, the ARP being asked
The ethernet type in message, ARP operation fields is asked to be matched with the ARP flow tables for arp reply, according to the ARP of matching
Execution field in flow table replys arp reply message to source virtual machine 23.
The source virtual machine 23, specifically for using the source MAC encapsulation business report in the arp reply message for receiving
Text, and the service message is sent to into source switch 22.
The controller 21, is additionally operable to when the IP address of purpose virtual machine 24 occurs modification, and controller 21 sends flow table
Modification message changes the purpose IP address field in the business flow list matching area of purpose switch 24 to purpose switch 24.
The method of the present invention is described in detail with reference to specific embodiment and realizes process and principle.
Embodiment one
The present embodiment as shown in figure 3, VM1 be source virtual machine, VM2 be purpose virtual machine, realize the report of software defined network
Literary processing method, including：
Step 201：On the switch of source electricity after with controller set up be connected, after the completion of connection establishment, controller issue for
The ARP flow tables of arp reply give source switch；
Step 202：VM1 initiates the communication with VM2, sends ARP request message, and in ARP request message, purpose IP address are
The IP address of VM2, target MAC (Media Access Control) address are broadcast address；
Step 203：After source switch receives the ARP request message of VM1, local flow table matching is carried out, is matched
The ARP flow tables issued by controller, source switch carry out replying arp reply message according to the ARP flow tables for matching；
Step 204：VM1 encapsulates service message using the source MAC in the arp reply message for receiving, and will be described
Service message is sent to source switch；
Step 205：After source switch receives service message, the flow table for locally not having business related, source switch will
Controller is given on service message；
Step 206：Controller calculates service message transmission path according to local topology information, issues for forwarding
Business flow list here, will be used for the target MAC (Media Access Control) address of the service message of the business flow list of forwarding to the switch on the path
The MAC Address for purpose switch is changed, source switch is handed down to；By the purpose of the service message of the business flow list for forwarding
MAC Address modification is the MAC Address of purpose virtual machine, is handed down to purpose switch.
Step 207：Source switch receives the business flow list for forwarding of controller, according to the industry for forwarding
Business flow table forwarding service message；
Step 208：After purpose switch receives the service message, according to business flow list by the purpose of service message
MAC Address replaces the MAC Address for purpose virtual machine, forwards the service message to VM2；
Said method also includes：When the IP address address of VM2 is revised as IP2 ' by IP2, controller sends flow mod
Purpose IP address are revised as IP2 ' by IP2 by the business flow list matching area of the purpose switch that message modification is connected with VM2.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (10)
1. a kind of message processing method of software defined network, it is characterised in that the method includes：
Controller issues the ARP flow tables for address resolution protocol (ARP) response to source switch；
After source switch receives the ARP request message of source virtual machine, replying ARP to source virtual machine according to the ARP flow tables should
Answer message；
Source virtual machine sends service message to source switch；
Service message is uploaded to controller by source switch；
Purpose media access control (MAC) the address modification of the service message of business flow list is purpose switch by controller
MAC Address, is handed down to the switch in addition to purpose switch in service message transmission path；By the service message of business flow list
Target MAC (Media Access Control) address modification for purpose virtual machine MAC Address, be handed down to purpose switch；
Source switch forwards the service message according to the business flow list；The purpose switch receives the service message
Afterwards, the MAC Address that the target MAC (Media Access Control) address replacement of service message is purpose virtual machine is forwarded by the business according to business flow list
Message is to purpose virtual machine.
2. processing method according to claim 1, it is characterised in that the ARP flow tables for arp reply include matching
(Match) field and execution (action) field, the matching field include ethernet type and ARP operation fields；It is described to hold
Row field is that ARP request message is revised as arp reply message, and beams back the instruction field of arp reply message from former port.
3. processing method according to claim 2, it is characterised in that the source switch receives the ARP of source virtual machine
After request message, replying arp reply message to source virtual machine according to the ARP flow tables for arp reply is：
After source switch receives the ARP request message of source virtual machine, by the ethernet type in the ARP request message, ARP
Operation field is matched with the ARP flow tables for arp reply, virtual to source according to the execution field in the ARP flow tables of matching
Machine replys arp reply message.
4. processing method according to claim 1, it is characterised in that the source virtual machine sends service message and exchanges to source
Machine is：Source virtual machine using the source MAC encapsulation service message in the arp reply message for receiving, and by the business report
Text is sent to source switch.
5. processing method according to claim 1, it is characterised in that the method also includes：When the IP ground of purpose virtual machine
When location occurs modification, controller sends flow table modification message and gives purpose switch, changes the business flow list matching of purpose switch
Purpose IP address field in region.
6. a kind of message handling system of software defined network, it is characterised in that the system includes：Controller, source switch, source
Virtual machine, purpose switch, purpose virtual machine；Wherein,
Controller, for the ARP flow tables for arp reply are issued to source switch；And by the mesh of the service message of business flow list
MAC Address modification for purpose switch MAC Address, be handed down in service message transmission path in addition to purpose switch
Switch；It is the MAC Address of purpose virtual machine by the target MAC (Media Access Control) address modification of the service message of business flow list, is handed down to purpose
Switch；
Source switch, for receiving after the ARP request message of source virtual machine, replys to source virtual machine according to the ARP flow tables
Arp reply message；And according to the business flow list forwarding service message；
Source virtual machine, for sending ARP request message and service message to source switch；
The target MAC (Media Access Control) address of service message, for receiving after the service message, is replaced by purpose switch according to business flow list
The MAC Address of purpose virtual machine is changed to, and the service message is forwarded to purpose virtual machine；
Purpose virtual machine, for receiving the service message.
7. processing system according to claim 6, it is characterised in that the ARP flow tables for arp reply include matching
Field and execution field, the matching field include ethernet type and ARP operation fields；The execution field is please by ARP
Ask message to be revised as arp reply message, and the instruction field of arp reply message is beamed back from former port.
8. processing system according to claim 7, it is characterised in that the source switch, specifically for receiving source
After the ARP request message of virtual machine, by the ethernet type in the ARP request message, ARP operation fields should with for ARP
The ARP flow tables answered are matched, and reply arp reply message to source virtual machine according to the execution field in the ARP flow tables of matching.
9. processing system according to claim 6, it is characterised in that the source virtual machine, specifically for using receiving
Arp reply message in source MAC encapsulation service message, and the service message is sent to into source switch.
10. processing system according to claim 6, it is characterised in that the controller, is additionally operable to when purpose virtual machine
When IP address occurs modification, controller sends flow table modification message and gives purpose switch, changes the business flow list of purpose switch
Purpose IP address field in matching area.
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| CN104601432B (en) * | 2014-12-31 | 2018-03-13 | 新华三技术有限公司 | A kind of message transmitting method and equipment |
| CN104618262B (en) * | 2015-01-15 | 2018-04-06 | 新华三技术有限公司 | A kind of method and apparatus of Message processing |
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| CN108293001B (en) | 2015-12-31 | 2020-10-23 | 华为技术有限公司 | Software defined data center and deployment method of service cluster in software defined data center |
| CN106059929A (en) * | 2016-06-02 | 2016-10-26 | 杭州华三通信技术有限公司 | Message responding method and device |
| CN106572029A (en) * | 2016-11-11 | 2017-04-19 | 浙江中烟工业有限责任公司 | Network data flow traction realizing method based on software definition |
| CN106878106B (en) * | 2017-02-24 | 2020-03-06 | 新华三技术有限公司 | Reachability detection method and device |
| CN109729026B (en) * | 2017-10-27 | 2020-12-01 | 迈普通信技术股份有限公司 | SDN network control method and SDN controller |
| CN107911297B (en) * | 2017-11-21 | 2020-03-24 | 迈普通信技术股份有限公司 | SDN network in-band control channel establishment method and device |
| CN110224942B (en) * | 2018-03-01 | 2023-08-04 | 中兴通讯股份有限公司 | Message processing method, device and storage medium |
| CN111355818B (en) * | 2018-12-24 | 2022-08-02 | 中国电信股份有限公司 | Address resolution scheduling method and device and address resolution system |
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