CN104734960A - Message processing method and controller equipment - Google Patents
Message processing method and controller equipment Download PDFInfo
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- CN104734960A CN104734960A CN201310714468.2A CN201310714468A CN104734960A CN 104734960 A CN104734960 A CN 104734960A CN 201310714468 A CN201310714468 A CN 201310714468A CN 104734960 A CN104734960 A CN 104734960A
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Abstract
The embodiment of the invention provides a message processing method and controller equipment, and is used for avoiding a great number of repeated messages which are used for inquiring an MAC address of an unknown host in an OpenFlow network and saving an equipment resource of a controller and a switch and a network bandwidth to promote the network efficiency. The method comprises the steps that the controller receives a request message sent by a first switch; the controller inquires a local record to confirm that the MAC address is not included, and sends the messages used for inquiring the MAC address to the switch which is connected with the controller; when the controller confirms that the number of the messages sent by the controller reaches to a first preset value and the MAC address which is fed back is not received, a flow table item is added to a drop flow table, and the flow table item is used for indicating the switch to drop the message which is used for inquiring the MAC address, sent by the host and received later; the controller sends the flow table item to the first switch.
Description
Technical field
The present invention relates to technical field of the computer network, particularly relate to a kind of message processing method and controller equiment.
Background technology
OpenFlow network is a kind of new network framework, network equipment chain of command and data surface is separated.OpenFlow network of network equipment comprises switch and controller, main frame in switch and network is direct-connected, for forwarding to main frame forwarding data bag and by the packet that main frame sends, controller and switchboard direct connection, by issuing stream table to realize the management to switch to switch, each stream list item is exactly one and forwards rule.
Internet protocol (Internet Protocol, IP) address is stored and media interviews control the mapping relations of (Media Access Control, MAC) address in controller in OpenFlow network and switch.Communication will be realized between main frame, need to send address resolution protocol (Address Resolution Protocol according to the IP address of peer to switch, ARP) message, the MAC Address of inquiry peer, switch or controller inquire the MAC Address that corresponding mapping relations then return peer.The reason such as not reach the standard grade owing to using the main frame of part IP address, do not store these IP addresses and the mapping relations of MAC Address of main frame using these IP addresses in controller and switch, this kind of main frame can be called unknown main frame.When the main frame in network send the message of MAC Address for inquiring about unknown main frame to direct-connected switch after, message is sent to controller by direct-connected exchange opportunity, controller can send message to other all switch of administration always, until feed back to corresponding switch again after receiving the message of the MAC Address comprising unknown main frame.
Defect of this cover interaction mechanism is: when the message of the MAC Address of or switch query unknown main frame complicated at network is more, controller and switch have a lot of repeatability about the message interaction of MAC Address inquiring about unknown main frame, result in the generation of a large amount of message, both occupy controller and a large amount of device resource of switch, waste the network bandwidth again.
Summary of the invention
Embodiments provide a kind of message processing method and controller equiment, in order to reduce the repeatability of controller and switch about the message interaction inquiring about unknown host MAC address, avoid the waste of device resource and the network bandwidth.
A kind of message processing method that the embodiment of the present invention provides comprises:
Controller receives the request message that the first switch sends, and described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards;
Described controller inquiry local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self;
When described controller determines that the quantity of the message self sent reaches the first preset value, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame;
Described stream list item is sent to described first switch by described controller.
A kind of controller equiment that the embodiment of the present invention provides comprises:
First request reception unit, for receiving the request message that the first switch sends, described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards;
Query unit, for inquiring about local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self;
Processing unit, determine that the quantity of the message self sent reaches the first preset value for working as, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame;
First-class table transmitting element, for sending to described first switch by described stream list item.
In the embodiment of the present invention, when described controller determines that the quantity for the message inquiring about described MAC Address sent reaches the first preset value, in drop stream table, increase a stream list item, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame; Described stream list item is sent to described first switch by described controller; Like this, make the first switch no longer can send the message for inquiring about described MAC Address to controller according to the stream list item received, avoiding the first switch repeatedly crosses in multiple times to the message of described controller transmission for inquiring about described MAC Address, and avoid described controller repeatedly excessively in multiple times to the message of respective switch transmission for inquiring about described MAC Address, decrease the message amount of network, save device resource and the network bandwidth of controller and switch, and then improve network efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of message processing method that the embodiment of the present invention provides;
Fig. 2 is the structural representation of the OpenFlow network that the embodiment of the present invention provides;
Fig. 3 is the message interaction schematic diagram of the OpenFlow network that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the controller equiment that the embodiment of the present invention provides;
Fig. 5 is the structural representation of another controller equiment that the embodiment of the present invention provides.
Embodiment
Embodiments provide a kind of message processing method and controller equiment, for the message avoiding OpenFlow network to occur the MAC Address for inquiring about unknown main frame of a large amount of repetitions, save device resource and the network bandwidth of controller and switch, and then promote network efficiency.
See Fig. 1, a kind of message processing method that the embodiment of the present invention provides comprises:
S101: controller receives the request message that the first switch sends, described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards.
First switch receives after the main frame be connected with self sends the request of the MAC Address for obtaining the main frame using assigned ip address, first inquire about the local record of the first switch, determine not comprise described MAC Address in local record, then send the request message for inquiring about described MAC Address to controller.
S102: described controller inquiry local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self.
First switch may be a switch, also may be multiple switch, when the first switch comprises multiple switch, controller successively receives the request message of the described MAC Address of inquiry that multiple switch sends, and when inquiring about local record and determining not comprise described MAC Address, respectively to the message of respective switch transmission for inquiring about described MAC Address that controller connects.
Concrete, controller is when the respective switch connected to controller sends the message for inquiring about described MAC Address, and adopt broadcast mode, broadcast object does not comprise the first switch.
S103: when described controller determines that the quantity of the message self sent reaches the first preset value, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame.
The quantity of the message for inquiring about described MAC Address that controller sends, relevant with the number of broadcast times of controller.Such as: controller management 10 switches, wherein 1 switch is direct-connected for the main frame of the message inquiring about described MAC Address with transmission, then controller is to the message of remaining 9 switches transmission for inquiring about described MAC Address, the message amount that single broadcast sends is 9, when number of broadcast times is n, the message amount of transmission is then 9*n.
Alternatively, when the message amount sent reaches the first preset value, controller is gone off the air.
S104: described stream list item is sent to described first switch by described controller.
After described stream list item is sent to the first switch by controller, first switch is according to described stream list item, abandon the message for inquiring about described MAC Address carrying out from host of receipt of subsequent, like this, the first switch can be avoided to repeat to the message of controller transmission for inquiring about described MAC Address, save the device resource of controller and switch, and save the network bandwidth.
After step S102, when described controller determines that the quantity of the message for inquiring about described MAC Address self sent is not more than the first preset value, and described controller by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, described MAC Address is sent to described first switch.
After step S104, the method that the embodiment of the present invention provides also comprises:
Described controller receives the message for inquiring about described MAC Address that the second switch sends;
When described controller determines that the quantity for the message inquiring about described MAC Address that described second switch received sends reaches the second preset value, and when drop stream table comprises described stream list item, described stream list item is sent to described second switch.
The difference of the first switch and the second switch is, first switch refers to the described switch sending the message for inquiring about described MAC Address in drop stream table before increase by stream list item, second switch refers to the described switch sending the message for inquiring about described MAC Address in drop stream table after increase by stream list item, for the message for inquiring about described MAC Address that the second switch sends, controller is after matching described stream list item, the message for inquiring about described MAC Address is not sent to respective switch, but when waiting until that the quantity of the message that the second switch sends reaches the second preset value, described stream list item is sent directly to the second switch, wherein, the second preset value can be 1, also can for the value being greater than 1.
Alternatively, whenever described stream list item is sent to a switch by controller, all record the switch receiving described stream list item; When described controller by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, MAC Address described in local record, described stream list item is deleted in drop stream table, and, send the notice of deleting described stream list item to the switch receiving described stream list item.Can to controller inquiry gateway MAC address after using the main frame of assigned ip address to reach the standard grade, controller receives the information of the gateway MAC address of this main frame of inquiry that the direct-connected switch of this main frame forwards, wherein carry the MAC Address of this main frame, controller is according to the MAC Address of this main frame carried in information, determine that assigned ip address and the mapping relations of MAC Address of the main frame using assigned ip address are gone forward side by side line item, and, delete the related streams list item in network.
Preferably, when described controller sends the notice of deleting described stream list item to the switch receiving described stream list item, described MAC Address is sent to the switch receiving described stream list item.Like this, when switch receives the message of the described MAC Address of inquiry of main frame again, described MAC Address can be fed back directly to main frame.
Below in conjunction with concrete application scenarios, the embodiment of the present invention is described in detail.
Controller 1 is comprised see Fig. 2, OpenFlow network, and switch 1, switch 2, switch 3 that controller 1 manages, switch 1 is direct-connected with host A, and switch 2 is direct-connected with host B, and main frame X not yet connects switch 3.Initial phase, controller obtains full mesh topology information, and automatic or manual connects switch 1, switch 2 and switch 3, completes configuration.
Fig. 3 is the message interaction schematic diagram of the OpenFlow network shown in Fig. 2, wherein, 1 message referring to the MAC Address for inquiring about main frame X, 2 refer to each switch to controller feed back and do not know the message of the MAC Address of main frame X, 3 refer to controller issues and comprises the message that drop flows list item.
The concrete interaction flow of each equipment of scene shown in Fig. 3 is as follows:
A, host A send ARP message to switch 1, the MAC Address of inquiry main frame X, and message comprises the IP address of main frame X;
B, switch 1 send ARP message with packet_in form to controller 1, the MAC Address of inquiry main frame X;
C, controller send ARP message with packet_out form to switch 2, switch 3, and the MAC Address of inquiry main frame X, records the quantity forwarded of ARP message simultaneously;
D, when controller sends packet_out form message more than n, abandoning (drop) stream table and increasing newly the stream list item of the IP address comprising main frame X;
This stream list item is handed down to switch 1 by e, controller;
F, switch 1 receive the message of access main frame X again, directly abandon, no longer packet_in form to send ARP message to controller after coupling drop stream table;
G, switch 2 receive the message of access main frame X again, so that packet_in form to give controller;
H, controller issue same stream list item to switch 2 after receiving the individual packet_in message of m (m<n).
After main frame X adds OpenFlow network, the interaction flow of each equipment is as follows:
I, main frame X initiatively send ARP message inquiry gateway MAC address;
This ARP message is reported controller by packet_in form by j, switch 2;
After k, controller 1 receive ARP message, answer the inquiry of main frame X, the IP address of storage host X and the mapping relations of MAC Address, and mate drop table, stream list item drop corresponding for the IP address of main frame X being flowed table is deleted;
The stream list item that l, controller 1 are shown with the drop stream that the IP address of packet_out form downward message notice respective switch deletion main frame X is corresponding;
During m, host A access main frame X, send ARP message to switch 1, switch 1 sends ARP message to controller 1;
N, controller 1 return the MAC Address of main frame X, and computation host A is to the access path of main frame X, and MAC Address and access path are sent to switch 1;
MAC Address is returned to host A by o, switch 1.
See Fig. 4, a kind of controller equiment that the embodiment of the present invention provides comprises:
First request reception unit 401, for receiving the request message that the first switch sends, described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards;
Query unit 402, for inquiring about local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self;
Processing unit 403, determine that the quantity of the message self sent reaches the first preset value for working as, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame;
First-class table transmitting element 404, for sending to described first switch by described stream list item.
Described processing unit 403 also for:
When the quantity of the message for inquiring about described MAC Address determining self to send is not more than the first preset value, and by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, described MAC Address is sent to described first switch.
See Fig. 5, this controller equiment also comprises:
Second request reception unit 405, for after described stream list item is sent to described first switch, receives the message for inquiring about described MAC Address that the second switch sends;
Second table transmitting element 406, the quantity for the message inquiring about described MAC Address for sending when described second switch determining to receive reaches the second preset value, and described drop stream table is when comprising described stream list item, described stream list item is sent to described second switch.
This controller equiment also comprises:
Stream table maintenance unit, for recording the switch receiving described stream list item;
When the switch by described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, MAC Address described in local record, described stream list item is deleted in drop stream table, and, send the notice of deleting described stream list item to the switch receiving described stream list item.
Described stream table maintenance unit also for:
When sending the notice of deleting described stream list item to the switch receiving described stream list item, send described MAC Address to the switch receiving described stream list item.
In sum, embodiments provide a kind of message processing method and controller equiment, when controller determines that the quantity of the message of the MAC Address for inquiring about the main frame using assigned ip address sent reaches the first preset value, increase newly in drop stream table and be used to indicate the stream list item that switch abandons the packet for inquiring about described MAC Address, and newly-increased stream list item is sent to corresponding switch, avoid switch repeatedly to cross and send the message for inquiring about described MAC Address to described controller in multiple times, and avoid controller repeatedly to cross in multiple times to the message of respective switch transmission for inquiring about described MAC Address, decrease the message amount of network, device resource and the network bandwidth of controller and switch are saved, and then improve network efficiency.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a message processing method, is characterized in that, comprising:
Controller receives the request message that the first switch sends, and described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards;
Described controller inquiry local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self;
When described controller determines that the quantity of the message self sent reaches the first preset value, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame;
Described stream list item is sent to described first switch by described controller.
2. the method for claim 1, is characterized in that, the described switch to being connected with self also comprises after sending the message for inquiring about described MAC Address:
When described controller determines that the quantity of the message for inquiring about described MAC Address self sent is not more than the first preset value, and described controller by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, described MAC Address is sent to described first switch.
3. the method for claim 1, is characterized in that, described controller also comprises after described stream list item is sent to described first switch:
Described controller receives the message for inquiring about described MAC Address that the second switch sends;
When described controller determines that the quantity for the message inquiring about described MAC Address that described second switch received sends reaches the second preset value, and when described drop stream table comprises described stream list item, described stream list item is sent to described second switch.
4. the method as described in claim 1 or 3, is characterized in that, described controller also comprises after described stream list item is sent to switch:
Record receives the switch of described stream list item;
When described controller by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, MAC Address described in local record, described stream list item is deleted in drop stream table, and, send the notice of deleting described stream list item to the switch receiving described stream list item.
5. method as claimed in claim 4, is characterized in that, also comprise:
When described controller sends the notice of deleting described stream list item to the switch receiving described stream list item, send described MAC Address to the switch receiving described stream list item.
6. a controller equiment, is characterized in that, comprising:
First request reception unit, for receiving the request message that the first switch sends, described request message is that the acquisition that described first switch receives the main frame be connected with self uses the request of the MAC Address of the main frame of assigned ip address to send afterwards;
Query unit, for inquiring about local record, when determining not comprise described MAC Address, sends the message for inquiring about described MAC Address to the switch be connected with self;
Processing unit, determine that the quantity of the message self sent reaches the first preset value for working as, and when not receiving the described MAC Address of feedback, abandoning increase by stream list item in drop stream table, described stream list item is used to indicate switch and abandons the subsequently received message for inquiring about described MAC Address sent by main frame;
First-class table transmitting element, for sending to described first switch by described stream list item.
7. equipment as claimed in claim 6, is characterized in that, described processing unit also for:
When the quantity of the message for inquiring about described MAC Address determining self to send is not more than the first preset value, and by the switch of described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, described MAC Address is sent to described first switch.
8. equipment as claimed in claim 6, is characterized in that, also comprise:
Second request reception unit, for after described stream list item is sent to described first switch, receives the message for inquiring about described MAC Address that the second switch sends;
Second table transmitting element, the quantity for the message inquiring about described MAC Address for sending when described second switch determining to receive reaches the second preset value, and described drop stream table is when comprising described stream list item, described stream list item is sent to described second switch.
9. equipment as described in claim 6 or 8, is characterized in that, also comprises:
Stream table maintenance unit, for recording the switch receiving described stream list item;
When the switch by described connection receive that the main frame of described use assigned ip address sends after reaching the standard grade include the information of described MAC Address time, MAC Address described in local record, described stream list item is deleted in drop stream table, and, send the notice of deleting described stream list item to the switch receiving described stream list item.
10. equipment as claimed in claim 9, is characterized in that, described stream show maintenance unit also for:
When sending the notice of deleting described stream list item to the switch receiving described stream list item, send described MAC Address to the switch receiving described stream list item.
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