CN107786461A - Realize the method and controller of flow table switching - Google Patents
Realize the method and controller of flow table switching Download PDFInfo
- Publication number
- CN107786461A CN107786461A CN201610725991.9A CN201610725991A CN107786461A CN 107786461 A CN107786461 A CN 107786461A CN 201610725991 A CN201610725991 A CN 201610725991A CN 107786461 A CN107786461 A CN 107786461A
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- China
- Prior art keywords
- flow table
- priority
- controller
- transmission path
- multigroup
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2458—Modification of priorities while in transit
Abstract
The invention discloses a kind of method and controller for realizing flow table switching, it is related to software defined network field.Method therein includes：Controller issues multigroup flow table for same service route forwarding unit, and each group flow table in multigroup flow table has different priority；Controller is in response to default handover triggering condition, delete the flow table of limit priority in multigroup flow table, so as to forwarding unit by Business Stream by multigroup flow table limit priority flow table indicate the first transmission path switch to limit priority in remaining flow table flow table indicate the second transmission path.So as to realize being switched fast for flow table.
Description
Technical field
The present invention relates to software defined network field, more particularly to a kind of method and controller for realizing flow table switching.
Background technology
Software defined network technology is separated the chain of command of traditional IP with forwarding surface.As shown in figure 1, forwarding
Face can be abstracted as a general controlled software defined network equipment, and chain of command can then be assisted by standardization such as OpenFlow
View issues flow table, forwarding unit is controlled, so as to realize the flexible control of network traffics.Pass through the portion of software defined network technology
Administration, operator can utilize the programmable features of software defined network equipment to realize the flexible dispatching of key business stream, so as to structure
Build it is quick, stably, the network of high quality, lifted Consumer's Experience.
In software defined network, current main-stream realizes that the method that Business Stream is dispatched mainly has two kinds by flow table：One
Kind is the scheduling that specified services stream is realized by changing flow table, but this mode needs to inquire about flow table storehouse, finds out and changes corresponding
Flow table item, time delay are larger；Another kind is by deleting flow table item corresponding to specified services stream, then re-issues and guides the Business Stream
The new flow table of flow direction, this mode can realize the dispatching requirement of partial service stream, but when the tune for needing progress a large number of services stream
When spending, the time delay that chain of command batch issues flow table is very big, usually second level, can not finishing service stream Real-Time Scheduling.
The content of the invention
A technical problem to be solved by this invention is：How being switched fast of flow table is realized.
One side according to embodiments of the present invention, there is provided a kind of method for realizing flow table switching, including：Controller pin
Issue multigroup flow table to same service route forwarding unit, each group flow table in multigroup flow table has different priority；Control
Device deletes the flow table of limit priority in multigroup flow table in response to default handover triggering condition, so that forwarding unit is by business
The first transmission path that stream is indicated by the flow table of limit priority in multigroup flow table switches to limit priority in remaining flow table
Second transmission path of flow table instruction.
In certain embodiments, this method includes：Controller issues high priority for same service route forwarding unit
Flow table and low priority flow table；Controller is deleted high priority flow table, set to forward in response to default handover triggering condition
Standby the second transmission road that the first transmission path that Business Stream is indicated by high priority flow table is switched to the instruction of low priority flow table
Footpath.
In certain embodiments, controller forms multigroup flow table according to Network planning information, and Network planning information includes industry
Business stream information, preferable first transmission path, the second alternative transmission path, the handover trigger bar for triggering path switching
Part.
In certain embodiments, this method also includes：Controller by remaining flow table the flow table of limit priority it is preferential
Level is heightened, and issues new flow table for Business Stream, and the priority of new flow table is less than the priority after heightening.
In certain embodiments, handover triggering condition includes：There is congestion situation in first transmission path.
In certain embodiments, controller switches over control for multiple Business Streams using flow table switching method.
Other side according to embodiments of the present invention, there is provided a kind of controller for realizing flow table switching, including：Flow table
Module is issued, for issuing multigroup flow table for same service route forwarding unit, each group flow table in multigroup flow table has not
Same priority；Flow table removing module, in response to default handover triggering condition, deleting limit priority in multigroup flow table
Flow table, so as to forwarding unit by Business Stream by multigroup flow table limit priority flow table indicate the first transmission path switch
The second transmission path of the flow table instruction of limit priority into remaining flow table.
In certain embodiments, flow table issuance module is used to issue high priority flows for same service route forwarding unit
Table and low priority flow table；Flow table removing module is used to, in response to default handover triggering condition, delete high priority flow table, with
Just forwarding unit switches to the first transmission path that Business Stream is indicated by high priority flow table the of the instruction of low priority flow table
Two transmission paths.
In certain embodiments, controller also includes：Flow table forms module, multigroup for being formed according to Network planning information
Flow table, Network planning information include business stream information, preferable first transmission path, the second alternative transmission path, for touching
Send out the handover triggering condition of path switching.
In certain embodiments, controller also includes：Priority adjusting module, for by limit priority in remaining flow table
The priority of flow table heighten；Flow table issuance module is additionally operable to issue new flow table for Business Stream, and the priority of new flow table is less than
Priority after heightening.
In certain embodiments, handover triggering condition includes：There is congestion situation in first transmission path.
In certain embodiments, controller is used to switch over control using flow table switching method for multiple Business Streams.
The present invention issues multigroup stream with different priority by controller for same service route forwarding unit
Table, when meeting default handover triggering condition, delete the flow table of limit priority in multigroup flow table so that forwarding unit can be with
Business Stream is switched to the transmission path of remaining flow table instruction, without waiting for new flow table is issued, so as to realize the quick of flow table
Switching.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 shows the schematic diagram of flow table switching method in the prior art.
Fig. 2 shows that the present invention realizes the schematic flow sheet of one embodiment of flow table switching method.
Fig. 3 shows that controller issues two groups of flow tables for each five-tuple of same service route matching.
Fig. 4 shows that the present invention realizes the schematic flow sheet of another embodiment of flow table switching method.
Fig. 5 shows that controller deletes high priority flow table for same Business Stream.
Fig. 6 shows that the present invention realizes the schematic flow sheet of one embodiment of the controller of flow table switching.
Fig. 7 shows that the present invention realizes the schematic flow sheet of another embodiment of the controller of flow table switching.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
The method for realizing flow table switching of one embodiment of the invention is described with reference to Fig. 2.
Fig. 2 shows that the present invention realizes the schematic flow sheet of one embodiment of flow table switching method.As shown in Fig. 2 the reality
Applying realizing in example, flow table switching method comprises the following steps：
Step S202, controller form multigroup flow table according to Network planning information.Wherein, Network planning information can include
Business stream information, preferable first transmission path, the second alternative transmission path, the handover trigger bar for triggering path switching
Part.
For example, controller can obtain Network planning information from network planning system.Handover triggering condition can include excellent
There is congestion situation in first transmission path of choosing.
Step S204, controller issue multigroup flow table for same service route forwarding unit, each group in multigroup flow table
Flow table has different priority.
Optionally, in step S204, controller for same service route forwarding unit issue high priority flow table and
Low priority flow table.As shown in figure 3, controller is directed to same Business Stream, two groups of flow tables are issued to each five-tuple of matching.Its
In, the instruction of high priority flow table is indicated from b ports forwarding service stream from a ports forwarding service stream, low priority flow table.
Step S206, controller delete the stream of limit priority in multigroup flow table in response to default handover triggering condition
Table, so as to forwarding unit by Business Stream by multigroup flow table limit priority flow table indicate the first transmission path switch to it is surplus
Second transmission path of the flow table instruction of limit priority in residual current table.
Optionally, in step S206, controller deletes high priority flow table in response to default handover triggering condition,
So that the first transmission path that Business Stream is indicated by high priority flow table is switched to the instruction of low priority flow table by forwarding unit
Second transmission path.Still by taking Fig. 3 as an example, controller deletes high priority flow table, so that forwarding unit is according to low priority flows
The instruction of table carries out Business Stream forwarding.
By above-described embodiment, controller issues for same service route forwarding unit multigroup has different priority
Flow table, when meeting default handover triggering condition, delete the flow table of limit priority in multigroup flow table so that forwarding unit
Business Stream can be switched to the transmission path of remaining flow table instruction, without waiting for new flow table is issued, so as to realize flow table
It is switched fast.
The method for realizing flow table switching of another embodiment of the present invention is described with reference to Fig. 4.
Fig. 4 shows that the present invention realizes the schematic flow sheet of another embodiment of flow table switching method.As shown in figure 4,
On the basis of embodiment shown in Fig. 2, flow table switching method also includes realizing in the embodiment：
Step S408, controller heighten the priority of the flow table of limit priority in remaining flow table, and are directed to Business Stream
New flow table is issued, the priority of new flow table is less than the priority after heightening.
By taking Fig. 5 as an example, controller has issued high priority flow table and low priority for same service route forwarding unit
Flow table.When meeting default handover triggering condition, controller deletes the flow table of limit priority, and now forwarding unit is by industry
The first transmission path that business stream is indicated by high priority flow table switches to the second transmission path of low priority flow table instruction.So
Afterwards, the priority of current flow table can be revised as high priority by controller by low priority, and for same Business Stream again
The new flow table of low priority is issued, to indicate that forwarding unit forwards same Business Stream from port b along other paths.
In above-described embodiment, controller heightens the priority of the flow table of limit priority in remaining flow table, and is directed to industry
Business, which flows down, send out new flow table, and the priority of new flow table can mend less than the priority after heightening after flow table is deleted to flow table
Fill and issue, subsequently further to realize being switched fast for flow table.
Optionally, in above-mentioned each embodiment, controller can be entered for multiple Business Streams using flow table switching method
Row switching control, to cause forwarding unit to be forwarded according to the instruction of the flow table of switching to Business Stream.
The controller for realizing flow table switching of one embodiment of the invention is described with reference to Fig. 6.
Fig. 6 shows that the present invention realizes the schematic flow sheet of one embodiment of the controller of flow table switching.As shown in fig. 6,
The controller 60 for realizing flow table switching in the embodiment includes:
Flow table forms module 602, and for forming multigroup flow table according to Network planning information, Network planning information includes business
Stream information, preferable first transmission path, the second alternative transmission path, the handover triggering condition for triggering path switching
Flow table issuance module 604, for issuing multigroup flow table for same service route forwarding unit, in multigroup flow table
Each group flow table has different priority.
Optionally, flow table issuance module 604 be used for for same service route forwarding unit issue high priority flow table with
Low priority flow table.
Flow table removing module 606, in response to default handover triggering condition, deleting limit priority in multigroup flow table
Flow table, so as to forwarding unit by Business Stream by multigroup flow table limit priority flow table indicate the first transmission path switch
The second transmission path of the flow table instruction of limit priority into remaining flow table.
Optionally, flow table removing module 606 is used to, in response to default handover triggering condition, delete high priority flow table,
So that the first transmission path that Business Stream is indicated by high priority flow table is switched to the instruction of low priority flow table by forwarding unit
Second transmission path.
By above-described embodiment, controller issues for same service route forwarding unit multigroup has different priority
Flow table, when meeting default handover triggering condition, delete the flow table of limit priority in multigroup flow table so that forwarding unit
Business Stream can be switched to the transmission path of remaining flow table instruction, without waiting for new flow table is issued, so as to realize flow table
It is switched fast.
Optionally, handover triggering condition includes：There is congestion situation in first transmission path.
Optionally, controller is used to switch over control using flow table switching method for multiple Business Streams.
The controller for realizing flow table switching of another embodiment of the present invention is described with reference to Fig. 7.
Fig. 7 shows that the present invention realizes the schematic flow sheet of another embodiment of the controller of flow table switching.Such as Fig. 7 institutes
Show, the controller 70 for realizing flow table switching in the embodiment includes:
Priority adjusting module 708, for the priority of the flow table of limit priority in remaining flow table to be heightened.
Flow table issuance module 604 is additionally operable to issue new flow table for Business Stream, and the priority of new flow table is less than after heightening
Priority.
Controller of the present invention issues multigroup flow table for same service route forwarding unit, each group flow table in multigroup flow table
With different priority；Controller deletes the stream of limit priority in multigroup flow table in response to default handover triggering condition
Table, so as to forwarding unit by Business Stream by multigroup flow table limit priority flow table indicate the first transmission path switch to it is surplus
Second transmission path of the flow table instruction of limit priority in residual current table, so as to realize being switched fast for flow table.
In above-described embodiment, controller heightens the priority of the flow table of limit priority in remaining flow table, and is directed to industry
Business, which flows down, send out new flow table, and the priority of new flow table can mend less than the priority after heightening after flow table is deleted to flow table
Fill and issue, subsequently further to realize being switched fast for flow table.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (12)
1. a kind of method for realizing flow table switching, including：
Controller issues multigroup flow table for same service route forwarding unit, and each group flow table in multigroup flow table has not
Same priority；
The controller deletes the flow table of limit priority in multigroup flow table in response to default handover triggering condition, with
Toilet states the first transmission path that forwarding unit is indicated the Business Stream by the flow table of limit priority in multigroup flow table
Switch to the second transmission path of the flow table instruction of limit priority in remaining flow table.
2. the method as described in claim 1, including：
Controller issues high priority flow table and low priority flow table for same service route forwarding unit；
The controller deletes the high priority flow table, so as to the forwarding unit in response to default handover triggering condition
The first transmission path that the Business Stream is indicated by the high priority flow table is switched into the low priority flow table instruction
Second transmission path.
3. the method for claim 1, wherein the controller forms multigroup flow table according to Network planning information,
The Network planning information include business stream information, preferable first transmission path, the second alternative transmission path, for triggering
The handover triggering condition of path switching.
4. the method as described in claim 1, it is characterised in that methods described also includes：
Controller heightens the priority of the flow table of limit priority in remaining flow table, and issues new stream for the Business Stream
Table, the priority of the new flow table are less than the priority after heightening.
5. the method as described in claim 1, it is characterised in that the handover triggering condition includes：First transmission path occurs
Congestion situation.
6. the method as described in claim any one of 1-5, it is characterised in that controller uses the stream for multiple Business Streams
Table switching method switches over control.
7. a kind of controller for realizing flow table switching, including：
Flow table issuance module, it is each in multigroup flow table for issuing multigroup flow table for same service route forwarding unit
Group flow table has different priority；
Flow table removing module, in response to default handover triggering condition, deleting limit priority in multigroup flow table
Flow table, the first biography for indicating the Business Stream by the flow table of limit priority in multigroup flow table so as to the forwarding unit
Defeated path switches to the second transmission path of the flow table instruction of limit priority in remaining flow table.
8. controller as claimed in claim 7, it is characterised in that
The flow table issuance module is used to issue high priority flow table and low priority flows for same service route forwarding unit
Table；
The flow table removing module is used in response to default handover triggering condition, the high priority flow table is deleted, with toilet
State forwarding unit and the first transmission path that the Business Stream is indicated by the high priority flow table is switched into the low priority
Second transmission path of flow table instruction.
9. controller as claimed in claim 7, wherein, the controller also includes：
Flow table forms module, and for forming multigroup flow table according to Network planning information, the Network planning information includes industry
Business stream information, preferable first transmission path, the second alternative transmission path, the handover trigger bar for triggering path switching
Part.
10. controller as claimed in claim 7, it is characterised in that the controller also includes：
Priority adjusting module, for the priority of the flow table of limit priority in remaining flow table to be heightened；
The flow table issuance module is additionally operable to issue new flow table for the Business Stream, and the priority of the new flow table, which is less than, to be heightened
Priority afterwards.
11. controller as claimed in claim 7, it is characterised in that the handover triggering condition includes：First transmission path goes out
Existing congestion situation.
12. the controller as described in claim any one of 7-11, it is characterised in that the controller is used to be directed to multiple business
Stream switches over control using the flow table switching method.
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| CN201610725991.9A CN107786461B (en) | 2016-08-25 | 2016-08-25 | Method and controller for realizing flow table switching |
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| CN201610725991.9A CN107786461B (en) | 2016-08-25 | 2016-08-25 | Method and controller for realizing flow table switching |
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| CN107786461B CN107786461B (en) | 2021-06-29 |
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| CN107786461B (en) | 2021-06-29 |
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Application publication date: 20180309 Assignee: China Telecom Intelligent Network Technology Co.,Ltd. Assignor: CHINA TELECOM Corp.,Ltd. Contract record no.: X2023110000025 Denomination of invention: Method and controller for realizing flow table switching Granted publication date: 20210629 License type: Exclusive License Record date: 20230220 |
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