CN106911595A - A kind of Openflow message performs method and device - Google Patents
A kind of Openflow message performs method and device Download PDFInfo
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- CN106911595A CN106911595A CN201710175399.0A CN201710175399A CN106911595A CN 106911595 A CN106911595 A CN 106911595A CN 201710175399 A CN201710175399 A CN 201710175399A CN 106911595 A CN106911595 A CN 106911595A
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- bundle
- message
- priority
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- openflow message
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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
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/6275—Queue scheduling characterised by scheduling criteria for service slots or service orders based on priority
Abstract
The present invention provides a kind of Openflow message and performs method, is applied to switching equipment, and methods described includes：When the carrying Openflow message and the binding Bundle of the priority of Openflow message for receiving controller transmission add message, the Openflow message that Bundle addition message is carried is added in the corresponding Bundle cachings of the Bundle additions message, and marks the priority of the Openflow message of the addition；When the Bundle for Bundle cachings for receiving the controller transmission performs message, the Openflow message that priority is marked in being cached to the Bundle is ranked up according to priority；The Openflow message that priority is marked during the Bundle is cached is performed according to the priority orders after sequence from high to low.
Description
Technical field
Method and device is performed the present invention relates to network communication technology field, more particularly to a kind of Openflow message.
Background technology
SDN (Software Defined Networks, software defined network) is a kind of new transmission via net framework,
By control plane and data planar separation, the flexible control of network traffics is realized.In SDN, controller passes through
Openflow message control switching equipment carries out Business Processing.
When controller performs Openflow message using Bundle mechanism triggering switching equipment batch, Openflow message
Execution sequence by Openflow message be added to Bundle cache in sequencing determine that this causes some important services
The Openflow message that Openflow message may be later than general service is performed, and Business Processing not enough optimizes, in some instances it may even be possible to meeting
Have influence on the stability of existing business.
The content of the invention
Method and device is performed it is an object of the invention to provide a kind of Openflow message, to be performed according to priority
Openflow message in Bundle cachings.
For achieving the above object, the invention provides following technical scheme：
The present invention provides a kind of Openflow message and performs method, is applied to switching equipment, and methods described includes：
Add in the carrying Openflow message and the Bundle of the priority of Openflow message for receiving controller transmission
Plus during message, the Openflow message that Bundle addition message is carried is added to the Bundle additions message corresponding
In Bundle cachings, and mark the priority of the Openflow message of the addition；
When the Bundle for Bundle cachings for receiving the controller transmission performs message, to described
The Openflow message that priority is marked in Bundle cachings is ranked up according to priority；
Performed during the Bundle is cached according to the priority orders after sequence from high to low and marked priority
Openflow message.
The present invention also provides a kind of Openflow message performs device, is applied to switching equipment, and described device includes：
Indexing unit, for receive controller transmission carrying Openflow message and Openflow message it is preferential
During the Bundle addition message of level, the Openflow message that Bundle addition message is carried is added to the Bundle and is added
Plus in the corresponding Bundle cachings of message, and mark the priority of the Openflow message of the addition；
Sequencing unit, disappears for being performed in the Bundle for Bundle cachings for receiving the controller transmission
During breath, the Openflow message that priority is marked in being cached to the Bundle is ranked up according to priority；
Execution unit, marked for being performed during the Bundle is cached according to the priority orders after sequence from high to low
The Openflow message of priority.
By above description as can be seen that the Openflow message during the present invention is cached to Bundle is provided with priority, and
Priority orders based on Openflow message perform the Openflow message in Bundle cachings, to ensure important service
Openflow message prioritizations are performed, and reach the optimization of Business Processing.
Brief description of the drawings
Fig. 1 is that a kind of Openflow message shown in the embodiment of the present invention performs method flow diagram；
Fig. 2 is a kind of SDN schematic diagram shown in the embodiment of the present invention；
Fig. 3 is the structural representation of the switching equipment shown in the embodiment of the present invention；
Fig. 4 is a kind of structural representation of the Openflow message performs device shown in the embodiment of the present invention.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
It is the purpose only merely for description specific embodiment in terminology used in the present invention, and is not intended to be limiting the present invention.
" one kind ", " described " and " being somebody's turn to do " of singulative used in the present invention and appended claims is also intended to include majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wraps
May be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used for being distinguished from each other open same type of information.For example, not departing from
In the case of the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining ".
The embodiment of the present invention proposes that a kind of Openflow message performs method, and the method is by setting Openflow message
Priority, the Openflow message in being cached to Bundle is performed according to priority orders, to ensure important service priority treatment.
It is one embodiment flow chart of Openflow message execution method of the present invention, the embodiment pair referring to Fig. 1
Openflow message implementation procedures are described.
Step 101, in the carrying Openflow message and the priority of Openflow message for receiving controller transmission
During Bundle addition message, the Openflow message that Bundle addition message is carried is added to the Bundle additions and is disappeared
In ceasing corresponding Bundle caching, and mark the priority of the Openflow message of the addition.
In SDN, controller manages switching equipment by Openflow message arrangements, for example, passing through Openflow
Message issues flow table item to switching equipment, so that switching equipment is forwarded based on flow table item to service traffics.
The present invention is using Bundle mechanism treatment Openflow message, specifically, controller is to switching equipment transmission
Bundle creates message (type of message is the OFPT_BUNDLE_CONTROL message of OFPBCT_OPEN_REQUEST), and exchange sets
It is standby that correspondence Bundle cachings are locallyd create according to Bundle establishments message, taken in the Bundle that switching equipment is received creates message
During with priority execution flag, mark the Bundle of the establishment to cache and support that priority is performed；Conversely, when switching equipment is received
Bundle create in message when not carrying priority execution flag, show that the Bundle cachings of the establishment do not support that priority is held
OK.
After Bundle caching establishments are completed, switching equipment receives the carrying Openflow message that controller sends
Bundle adds message (OFPT_BUNDLE_ADD_MESSAGE), and the Openflow message that Bundle addition message is carried is added
It is added in the corresponding Bundle cachings of Bundle additions message.Disappear when Openflow is also carried in the Bundle addition message for receiving
During the priority of breath, the priority of the Openflow message being added in Bundle cachings is locally marked.For example, controller can
It is that the Openflow message of different business sets different priority, so that switching equipment is according to the significance level of business
The Openflow message being added in Bundle cachings marks different priority.
Step 102, when the Bundle for Bundle cachings for receiving the controller transmission performs message,
The Openflow message that priority is marked in being cached to the Bundle is ranked up according to priority.
Specifically, when the Bundle that switching equipment receives controller transmission performs message, (type of message is OFPBCT_
The OFPT_BUNDLE_CONTROL message of COMMIT_REQUEST) when, first determine whether that the Bundle performs message corresponding
Whether Bundle cachings support that priority is performed, and do not support that priority is performed when Bundle performs the corresponding Bundle cachings of message
When, can be processed using existing executive mode, will not be repeated here；When Bundle performs the corresponding Bundle cachings branch of message
When holding priority execution, the Openflow message that priority is marked in being cached to Bundle is ranked up according to priority.
It can be seen that, the present invention is only performed by setting the priority execution flag that Bundle is cached to support priority
Openflow message in Bundle cachings is ranked up, and improves the execution efficiency of Openflow message.
Step 103, performs during the Bundle is cached according to the priority orders after sequence from high to low and marked preferentially
The Openflow message of level.
In this step, switching equipment preferentially performs the Openflow message of high priority, then performs low priority
Openflow message, performs to priority identical Openflow message according to the sequencing being added to during Bundle is cached.
After the Openflow message that marked priority has been performed, if also there is unmarked priority in Bundle cachings
Openflow message when, then it is suitable according to the priority being added to during Bundle is cached to the Openflow message of unmarked priority
Sequence is performed.
It can be seen that, the present invention is by the Openflow message in the Bundle cachings to supporting priority to perform according to priority
Order is performed, so that important service is able to priority treatment.
Additionally, deleting message (being designated as OFPT_BUNDLE_DELETE_MESSAGE) present invention also adds Bundle.When
Controller will be deleted when having been added to the Openflow message in Bundle cachings, and the transmittable carrying Openflow to be deleted disappears
The Bundle of the mark of breath deletes message to switching equipment, and switching equipment is searched according to the mark of the Openflow message
The Openflow message for having like-identified in Bundle cachings is deleted, and reservation is real needs in caching Bundle
The Openflow message of execution, to reduce the number of times that switching equipment performs additions and deletions operation repeatedly.
For example, such as controller with the addition of one for increasing flow table item in being cached to the Bundle of switching equipment
Openflow message (be designated as Openflow flow tables addition message), now, there is link change in network, controller is according to this
Link change determines to need to cancel the Openflow flow tables addition message having been added in Bundle cachings, does not have in the prior art
The mechanism of message in Bundle cachings is deleted, an Openflow for deletion flow table item is with the addition of in can only being cached to Bundle again
Message (is designated as Openflow flow tables and deletes message).Bundle cachings are triggered after execution, and switching equipment is first carried out
Openflow flow tables add message, to one flow table item of increase in hardware resource, then perform Openflow flow tables deletion message, delete
Except the flow table item added.When link in network is unstable, the hardware forwarding plane of switching equipment can be caused a large amount of streams occur
The additions and deletions of list item.And the present invention deletes message, the Openflow flow tables during can directly Bundle be cached by increasing Bundle
Addition message is deleted, and the flow table item that Openflow flow tables addition message is carried is not issued to hardware forwarding plane really also, because
This, can be avoided the frequent additions and deletions to hardware forwarding plane flow table item.
Now by taking SDN shown in Fig. 2 as an example, Openflow message implementation procedures are discussed in detail.
SDN shown in Fig. 2 includes controller Controller and switching equipment SW1~SW6, controller and switching equipment
Between information exchange is carried out by Openflow agreements.Virtual machine VM1~VM100 is hung under SW1, hung under SW6 virtual machine VM101~
VM200.Three kinds of business are deployed in the SDN, according to significance level divide be followed successively by service end business, general service, its
Its business, and the priority of the Openflow message of preset service end business is 3；The Openflow message of general service it is preferential
Level is 2；The priority of the Openflow message of other business is 1.
It is assumed that VM1~VM30, VM101~VM130 deployment general service；VM31~VM70, VM131~VM170 deployment clothes
Business end business；Remaining deploying virtual machine other business.Flow table is now issued to switching equipment by Openflow message with controller
As a example by, current SDN is in steady operational status, the existing guide data forwarding of hardware forwarding plane of each switching equipment
Flow table item.
Embodiment one：
At a time the port S2down of SW1 falls, and causes the flow table item of virtual machine VM1~VM100 on SW1 to be required for more
Newly.
Controller sends Bundle and creates message for this port down events to SW1, is created in Bundle and disappeared
(for example, flags fields) carries priority and performs mark in breath.SW1 creates message establishing Bundle according to the Bundle, is designated as
Bundle1, and mark Bundle1 to support that priority is performed.
By taking the flow table item that Controller issues VM1 as an example, Controller is sent for Bundle1's to SW1
Bundle adds message, and the Openflow message that the flow table item for adding VM1 is carried in Bundle addition message (is designated as
Flow-Mod1 the priority of Flow-Mod1), and in Bundle addition message is carried, as it was previously stated, what is disposed on VM1 is general
Logical business, therefore, the priority of Flow-Mod1 is 2.After SW1 receives Bundle addition message, Bundle addition message is carried
Flow-Mod1 be added in the Bundle1 for having created, and flag F low-Mod1 priority be 2.Similarly, Controller
Flow table item for each virtual machine sends Bundle addition message, completes the addition of correspondence Flow-Mod message, is designated as
Flow-Mod2~Flow-Mod100, and mark the priority of correspondence Flow-Mod message.
Controller sends the Bundle execution message for Bundle1, and SW1 confirms that Bundle1 supports that priority is held
After row, the Flow-Mod message to marked priority in Bundle1 is ranked up according to the priority of Flow-Mod message, excellent
First carry out the Flow-Mod message of high priority.As it was previously stated, VM31~VM70 deploys service end business, correspondence Flow-
The priority of Mod31~Flow-Mod70 is 3；VM1~VM30 deploys general service, correspondence Flow-Mod1~Flow-
The priority of Mod30 is 2；VM71~VM100 deploys other business, and correspondence Flow-Mod71~Flow-Mod100's is preferential
Level is 1.Therefore, Flow-Mod31~Flow-Mod70 is preferentially performed, then performs Flow-Mod1~Flow-Mod30, finally held
Row Flow-Mod71~Flow-Mod100, i.e., it is preferential to ensure that service end business correspondence flow table item is preferentially issued.
And Bundle mechanism of the prior art is added to the sequencing during Bundle is cached according to Openflow message
Perform, if the Openflow message of low priority flow table item is first added in Bundle cachings, the low priority flow table item
Openflow message is first carried out, and the flow table item of the low priority is first issued in the hardware resource of switching equipment, instructs low preferential
Level business forwarding.If the hardware resource insufficient space of switching equipment, after be added to Bundle caching in high priority flow table item
Openflow message, the low priority flow table item for having issued can be covered when being issued in hardware resource, cause executed
Low priority traffice is interrupted.
And during Bundle mechanism of the invention using the order execution Bundle according to priority from high to low due to being cached
Openflow message, therefore, regardless of Openflow message be added to Bundle caching in order, all preferentially perform height
The Openflow message (present invention sets high priority to the Openflow message for carrying high priority flow table item) of priority, should
High priority flow table item is preferentially issued in the hardware resource of switching equipment, instructs high-priority service to forward.Work as switching equipment
Hardware resource insufficient space when, what the Openflow message of the low priority for performing afterwards was carried is low priority flow table item, should
Low priority flow table item cannot cover the high priority flow table item for having issued, therefore, the Gao You being currently running will not be interrupted
First level business, improves the stability of business in network.
Embodiment two：
At a time, the port S1 of SW1 is changed into up from down, and Controller sends Bundle and creates message to SW1,
SW1 creates message establishing Bundle1 according to the Bundle；Controller sends the Bundle additions for Bundle1 to SW1
Message, carries the Flow-Mod message for issuing virtual machine flow table item in Bundle addition message, and SW1 disappears Flow-Mod
Breath is added in Bundle1, specifically describes and can be found in example one, repeats no more here.It is assumed that Controller has passed through
Bundle additions message with the addition of Flow-Mod1~Flow-Mod60 (flow table item of correspondence VM1~VM60) in Bundle1,
Now, port S1 is changed into down from up again, then Controller is directed to each Flow-Mod having been added in Bundle1 and disappears
Breath sends Bundle and deletes message, the Flow-Mod message in carrying during Bundle deletes message has been added to Bundle1
Mark, for example, carrying the mark of Flow-Mod1 in Bundle deletes message, then SW1 is according in mark deletion Bundle1
Flow-Mod1, similarly, delete Flow-Mod2~Flow-Mod60 for having added in Bundle1.That is,
Controller to SW1 send Bundle perform message before, based on the change of port S1, Controller can add repeatedly or
Delete the Flow-Mod message in Bundle1.Because the Flow-Mod message in Bundle1 is not performed really, correspondence flow table item
Be not issued to hardware forwarding plane, therefore, do not result in the frequent additions and deletions of hardware forwarding plane flow table item, be more not in due to
The deletion of hardware flow table item causes a large amount of Packet-in messages impact controllers, to a certain extent, plays suppression link concussion
Effect.
It is corresponding with the embodiment that foregoing Openflow message performs method, held present invention also offers Openflow message
The embodiment that luggage is put.
The embodiment of Openflow message performs device of the present invention can be applied on switching equipment.Device embodiment can be with
Realized by software, it is also possible to realized by way of hardware or software and hardware combining.As a example by implemented in software, patrolled as one
Device in volume meaning, is that corresponding computer program instructions are formed in the processor run memory by equipment where it
's.From for hardware view, as shown in figure 3, being a kind of hardware knot of Openflow message performs device of the present invention place equipment
Composition, in addition to processor and nonvolatile memory shown in Fig. 3, equipment in embodiment where device generally according to
The actual functional capability of the equipment, can also include other hardware, and this is repeated no more.
Fig. 4 is refer to, is the structural representation of the Openflow message performs devices in one embodiment of the invention.Should
Openflow message performs device includes indexing unit 401, sequencing unit 402 and execution unit 403, wherein：
Indexing unit 401, for receiving the carrying Openflow message and Openflow message of controller transmission
During the binding Bundle addition message of priority, the Openflow message that Bundle addition message is carried is added to described
In the corresponding Bundle cachings of Bundle additions message, and mark the priority of the Openflow message of the addition；
Sequencing unit 402, for being held in the Bundle for Bundle cachings for receiving the controller transmission
During row message, the Openflow message that priority is marked in being cached to the Bundle is ranked up according to priority；
Execution unit 403, for performing the Bundle cachings acceptance of the bid according to the priority orders after sequence from high to low
The Openflow message of priority is remembered.
Further,
The indexing unit 401 receive controller transmission carrying Openflow message and Openflow message it is excellent
Before the Bundle addition message of first level, it is additionally operable to when the carrying priority execution flag for receiving the controller transmission
When Bundle creates message, Bundle cachings are locallyd create, and marks the Bundle of establishment to cache and support that priority is performed；
The sequencing unit 402, if supporting that priority is performed specifically for Bundle cachings, to the Bundle
The Openflow message that priority is marked in caching is ranked up according to priority.
Further,
Priority orders of the execution unit 403 after according to sequence from high to low perform the Bundle cachings acceptance of the bid
Remember after the Openflow message of priority, be additionally operable to also there is unmarked priority in the Bundle is cached
During Openflow message, to the Openflow message of the unmarked priority according to the elder generation being added to during the Bundle is cached
Order is performed afterwards.
Further, described device also includes：
Unit is deleted, the Bundle for receiving the correspondence Bundle cachings that the controller sends deletes message,
The Bundle deletes the mark of the Openflow message to be deleted of carrying in message；Message is deleted according to the Bundle to carry
Openflow message mark, the Openflow message that inquire about has like-identified in Bundle caching deleted.
The function of unit and the implementation process of effect correspond to step in specifically referring to the above method in said apparatus
Implementation process, will not be repeated here.
For device embodiment, because it corresponds essentially to embodiment of the method, so related part is referring to method reality
Apply the part explanation of example.Device embodiment described above is only schematical, wherein described as separating component
The unit of explanation can be or may not be physically separate, and the part shown as unit can be or can also
It is not physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to reality
Selection some or all of module therein is needed to realize the purpose of the present invention program.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (8)
1. a kind of Openflow message performs method, is applied to switching equipment, it is characterised in that methods described includes：
Add in the carrying Openflow message and the binding Bundle of the priority of Openflow message for receiving controller transmission
Plus during message, the Openflow message that Bundle addition message is carried is added to the Bundle additions message corresponding
In Bundle cachings, and mark the priority of the Openflow message of the addition；
When the Bundle for Bundle cachings for receiving the controller transmission performs message, to the Bundle
The Openflow message that priority is marked in caching is ranked up according to priority；
The Openflow that priority is marked during the Bundle is cached is performed according to the priority orders after sequence from high to low
Message.
2. the method for claim 1, it is characterised in that the carrying Openflow message for receiving controller transmission
Before the Bundle addition message of the priority of Openflow message, also include：When taking of receiving that the controller sends
When Bundle with priority execution flag creates message, Bundle cachings are locallyd create, and mark the Bundle of establishment to cache
Support that priority is performed；
The Openflow message that priority is marked in the caching to the Bundle is ranked up according to priority, including：
If the Bundle cachings support that priority is performed, the Openflow of priority is marked in being cached to the Bundle
Message is ranked up according to priority.
3. the method for claim 1, it is characterised in that the priority orders according to after sequence from high to low are performed
Be marked in the Bundle cachings after the Openflow message of priority, also included：
When also there is the Openflow message of unmarked priority in Bundle cachings, to the unmarked priority
Openflow message is performed according to the sequencing being added to during the Bundle is cached.
4. the method for claim 1, it is characterised in that methods described also includes：
The Bundle for receiving the correspondence Bundle cachings that the controller sends deletes message, and the Bundle deletes message
The mark of the Openflow message that middle carrying to be deleted；
The mark of the Openflow message that message is carried is deleted according to the Bundle, inquiring about in the Bundle cachings has phase
Deleted with the Openflow message of mark.
5. a kind of Openflow message performs device, is applied to switching equipment, it is characterised in that described device includes：
Indexing unit, in the carrying Openflow message and the priority of Openflow message for receiving controller transmission
During binding Bundle addition message, the Openflow message that Bundle addition message is carried is added to the Bundle and is added
Plus in the corresponding Bundle cachings of message, and mark the priority of the Openflow message of the addition；
Sequencing unit, for receiving the Bundle execution message for Bundle cachings that the controller sends
When, the Openflow message that priority is marked in being cached to the Bundle is ranked up according to priority；
Execution unit, marked preferentially for being performed during the Bundle is cached according to the priority orders after sequence from high to low
The Openflow message of level.
6. device as claimed in claim 5, it is characterised in that：
The indexing unit is in the carrying Openflow message and the priority of Openflow message for receiving controller transmission
Before Bundle addition message, it is additionally operable to when the Bundle wounds for receiving the carrying priority execution flag that the controller sends
When building message, Bundle cachings are locallyd create, and marks the Bundle of establishment to cache and support that priority is performed；
The sequencing unit, if supporting that priority is performed specifically for Bundle cachings, in being cached to the Bundle
The Openflow message that marked priority is ranked up according to priority.
7. device as claimed in claim 5, it is characterised in that：
Be marked in priority orders execution of the execution unit after according to the sequence from high to low Bundle cachings excellent
After the Openflow message of first level, it is additionally operable to disappear as the Openflow that also there is unmarked priority in Bundle cachings
During breath, the Openflow message to the unmarked priority is held according to the sequencing being added to during the Bundle is cached
OK.
8. device as claimed in claim 5, it is characterised in that described device also includes：
Unit is deleted, the Bundle for receiving the correspondence Bundle cachings that the controller sends deletes message, described
Bundle deletes the mark of the Openflow message to be deleted of carrying in message；Delete what message was carried according to the Bundle
The mark of Openflow message, the Openflow message that inquire about has like-identified in the Bundle cachings is deleted.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110177053A (en) * | 2019-05-07 | 2019-08-27 | 中国工商银行股份有限公司 | A kind of smart message sending method and device |
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