CN104579722A - Flow statistics capability negotiation method and apparatus - Google Patents
Flow statistics capability negotiation method and apparatus Download PDFInfo
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Abstract
The present invention discloses a flow statistics capability negotiation method and apparatus. The method comprises: an OF controller sends a flow entry modification message for a flow table to an OF switch; in the case that the OF switch meets the modification condition in the flow entry modification message, the OF controller indicates the OF switch to add or modify the corresponding flow entry according to a modification condition, and indicates the OF switch to perform a flow statistics function for the flow entry or not by using the mark in the flow entry modification message; and with regard to the flow entry for which the flow statistics function is performed, the OF controller sends a flow statistics request message to the OF switch to query flow statistics information of the flow entry. Through the adoption of the method and apparatus, the forwarding flexibility of hardware or chips adaptable OpenFlow flow table pipe can be improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of machinery of consultation and the device that flow statistical power.
Background technology
Increasing disadvantage is exposed along with when network, the demand of people to network performance becomes more and more higher, researcher has to a lot of sophisticated functions to join in the middle of the architecture of router, such as OSPF(Open Shortest Path First, ospf) (a kind of Interior Gateway Protocol), BGP(Bridge Gateway Protocol, Border Gateway Protocol), multicast, Differentiated Services, traffic engineering, NAT(Network Address Translation, network address translation), fire compartment wall, MPLS(Multi-Protocol Label Switching, negotiate marking commutation) etc.This just make the switching equipment such as router become more and more too fat to move and also the space of performance boost more and more less.
But distinct with the predicament of network field, computer realm achieves development with rapid changepl. never-ending changes and improvements.The development of careful review computer realm, is not difficult to find that its key is that computer realm have found a kind of simply available hardware bottom layer (x86 instruction set).Owing to there being a kind of so public hardware bottom layer, so in software, no matter be that application program or operating system all achieve development at full speed.Now much advocate that the personage redesigning computer network architectures thinks: the success that network can copy computer realm solves all problems that present network runs into.Under the guidance of this thought, network in the future will be such: the data path (switch, router) of bottom is " mute, simple, minimum ", and define the public API(Application Programming Interface about stream table of an opening, application programming interface), adopt controller to control whole network simultaneously.The API that following researcher just freely can call bottom on the controller programmes, thus realizes the innovation of network.
Based on above-mentioned theory, there is SDN(Software Defined Network, software defined network), it is that a kind of new network proposed by Clean slate seminar of Stanford Univ USA innovates framework (please refer to Fig. 1, Fig. 1 is the OpenFlow protocol application Organization Chart according to correlation technique) at first.At present, its core technology OpenFlow agreement can by separating network equipment chain of command (comprising OpenFlow Controller) and data surface (comprising OpenFlow Logical Switch), thus achieve the flexible control of network traffics, for the innovation of network and application provides good platform.
OpenFlow agreement is used to the standard describing mutual information used between controller and switch, and the interface standard of controller and switch.The core of agreement is the set for OpenFlow protocol information structure.OpenFlow flow table (please refer to Fig. 3) or form pipeline (please refer to Fig. 2) through multiple stream table cascade of layout and be used for configuration switch forward-path, the Message processing flow process shown in Fig. 3 comprises: (1) finds the coupling stream entry of limit priority; (2) application instruction: amendment message or update action collection; More new metadata; (3) matched data and behavior aggregate are sent to next stream table.Stream table clause in Fig. 3 is made up of following several fields such as matching field, counter and instruction set:
| Match Fields | Priority | Counters | Instructions | Timeouts | Cookie |
Wherein, Match Fields is the input keyword of message coupling, for mating a stream table clause; Counter is the various statistical informations for managing; Instruction set (Instructions) refers to the operational order to message, comprises abandoning, the designated port that E-Packets, arranging header field value, increase encapsulated tags etc.Behavior aggregate (Action Set) and each message are associated, it transmit between multiple stream tables of pipeline and the instruction shown by each stream revise, until line treatment terminates, form final behavior aggregate.
In the related, OF switch take switch as the stream statistical power of granularity feedback flow table, namely otherwise stream tables all on OF switch all support to flow statistical power, or not support.This stream statistical power for all stream tables of OF switch is not suitable with the OF switch that differentiation realizes, such as OF exchange hardware determines that stream statistics do not supported by certain table of Pipeline, and not every stream statistics has traffic necessity (in the routing table that such as tradition forwards, the stream do not done based on route is added up).If all supported, by the counter resources of excessive consumption OF switch, such as, usually on OF switch, on the OF switch that especially hardware mode realizes, for the consideration of the factors such as cost, counter resources is often more limited.
If this stream statistical power is refine to comparatively fine granularity further, as flowed table granularity, then can transmit the layout of set according to the ardware feature of OF switch or controller to OF exchange service, OF switch top shunting table is allowed not support to flow statistical power, part is supported, can strengthen the flexibility of hardware or the adaptive OpenFlow flow table pipeline forwarding of chip like this.And, can allow based on stream entry granularity selection support further or not support to flow the flexibility that statistics can increase service controller further, saving counter resources on OF switch.
Excessively thick for the stream statistical function Control granularity on OF switch in correlation technique, can not the scarcity of resources of flexible adaptation forwarding unit or the problem of hard-wired restriction, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of machinery of consultation and the device that flow statistical power, excessively thick with the stream statistical function Control granularity at least solved on OF switch, can not the scarcity of resources of flexible adaptation forwarding unit or the problem of hard-wired restriction.
According to an aspect of the present invention, provide a kind of machinery of consultation of flowing statistical power, be applied to OF controller side, comprise: OF controller sends the stream entry amendment message for stream table to OF switch; When OF switch meets the amendment condition of stream entry amendment message, OF controller instruction OF switch adds according to amendment condition or amendment flows entry accordingly, and whether performs the stream statistical function of stream entry by the mark instruction OF switch in stream entry amendment message; For the stream entry performing stream statistical function, OF controller sends stream statistics request message to inquire about the traffic statistics of stream entry to OF switch.
Preferably, before the stream entry amendment message that OF controller is shown to the transmission of OF switch for stream, comprise: OF controller receives the parameter of the stream statistical power that OF switch reports, wherein, parameter is by OF switch when receiving the stream table feature request message that OF interchanger sends, and convection current table feature request message sends to OF controller after making a concrete analysis of.
Preferably, the concrete analysis that OF switch convection current table feature request message is carried out comprises: if stream table feature request message does not comprise concrete stream table property request, OF switch determines the stream table characteristic response message sending the parameter carrying stream statistical power to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; If stream table feature request message comprises concrete stream table property request and individual features parameter, OF switch is under determining to support situation of modifying to individual features parameter, determine according to concrete stream table property request amendment individual features parameter and send the stream table characteristic response message of carrying amended individual features parameter to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
Preferably, OF controller to send to OF switch stream statistics request message with statistic fluid bar target flow after, comprising: OF controller receives the stream statistics response message that OF switch sends.
Preferably, the method also comprises: when OF switch cannot meet the amendment condition of stream entry amendment message, OF controller receives the first error message that OF switch sends; The stream table property request message of carrying the requirement of stream statistical power parameter modification is received at OF switch, and when cannot support that convection current statistical power parameter is modified, OF controller receives the second error message carrying error reason that OF switch sends; Receive at OF switch and flow statistics request message, and when determining that the stream table at not convection current entry execution stream statistical function or stream entry place is not supported to flow statistical function, OF controller receives the 3rd error message of OF switch transmission.
Preferably, the content of stream entry amendment message comprises: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, stream statistics request marks is used to indicate stream table clause the need of carrying out stream statistics; Message byte number and/or the message number of stream statistics request message for asking OF switch statistic data to be matched with stream entry, stream statistics request message comprises: stream table number and stream item retrievals key assignments.
According to another aspect of the present invention, provide a kind of machinery of consultation of flowing statistical power, be applied to OF exchanger side, comprise: OF switch receives the stream entry amendment message for stream table that OF controller sends; When the amendment condition of satisfied stream entry amendment message, OF switch adds according to amendment condition or amendment flows entry accordingly, and determines whether according to the mark instruction in stream entry amendment message the stream statistical function performing stream entry; OF switch receives the stream statistics request message that OF controller sends, stream of reply statistics response message, and wherein, stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
Preferably, before receiving the stream entry amendment message for stream table of OF controller transmission, comprise: OF switch receives the stream table feature request message that OF interchanger sends, and after convection current table feature request message makes a concrete analysis of, to the parameter of OF controller report stream statistical power.
Preferably, the concrete analysis that OF switch convection current table feature request message is carried out comprises: if stream table feature request message does not comprise concrete stream table property request, OF switch sends the stream table characteristic response message of the parameter carrying stream statistical power to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; If stream table feature request message comprises concrete stream table property request and individual features parameter, OF switch is under determining to support situation of modifying to individual features parameter, according to concrete stream table property request amendment individual features parameter, and the stream table characteristic response message of carrying amended individual features parameter is sent to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
According to another aspect of the invention, provide a kind of consulting device flowing statistical power, be positioned at OF controller, comprise: the first sending module, for sending the stream entry amendment message for stream table to OF switch, wherein, flow entry amendment message and carry the mark whether instruction OF switch performs the stream statistical function of stream entry; Second sending module, for for the stream entry performing stream statistical function, sends stream statistics request message to inquire about the traffic statistics of stream entry to OF switch; 3rd sending module, for sending stream table feature request message to OF switch with inquiry or the characteristic parameter arranging OF switch appointment stream table, wherein, characterisitic parameter comprises the parameter of described stream statistical power.
Preferably, this device also comprises: the first receiver module, before sending stream entry amendment message at the first sending module to OF switch, receive the parameter of the stream statistical power that OF switch reports, wherein, parameter is by OF switch when receiving the stream table feature request message that the 3rd sending module sends, and convection current table feature request message sends to OF controller after making a concrete analysis of.
Preferably, this device also comprises: the second receiver module, after sending stream statistics request message at the second sending module to OF switch, receives the stream statistics response message that OF switch sends.
Preferably, this device also comprises: the 3rd receiver module, for cannot meet the amendment condition flowing entry amendment message at OF switch, receives the first error message that OF switch sends; 4th receiver module, for receiving the stream table property request message of carrying the requirement of stream statistical power parameter modification at OF switch, and when cannot support that convection current statistical power parameter is modified, receive the second error message carrying error reason that OF switch sends; 5th receiver module, for receiving stream statistics request message at OF switch, and when determining that the stream table at not convection current entry execution stream statistical function or stream entry place is not supported to flow statistical function, OF controller receives the 3rd error message of OF switch transmission.
Preferably, the content of stream entry amendment message comprises: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, stream statistics request marks is used to indicate stream table clause the need of carrying out stream statistics; Message byte number and/or the message number of stream statistics request message for asking OF switch statistic data to be matched with stream entry, stream statistics request message comprises: stream table number and stream item retrievals key assignments.
Provide a kind of consulting device flowing statistical power, be positioned at OF switch, comprise according to of the present invention: the first processing module also on the one hand, for receiving the amendment of the stream entry for the stream table message that OF controller sends; Second processing module, for meeting the amendment condition flowing entry amendment message at OF switch, add according to amendment condition or revise and flow entry accordingly, and determine whether to perform the stream statistical function flowing entry according to the mark instruction in stream entry amendment message; 3rd processing module, for receiving the stream statistics request message that OF controller sends, and stream of reply statistics response message, wherein, stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
Preferably, this device also comprises: the 4th processing module, for receive stream entry amendment message in the first processing module before, receive the stream table feature request message that OF interchanger sends, and after convection current table feature request message makes a concrete analysis of, specify the stream table characterisitic parameter of stream table to OF controller report, stream table characterisitic parameter comprises the parameter of stream statistical power.
Preferably, 4th processing module comprises: the first processing unit, for when stream table feature request message does not comprise concrete stream table property request, the stream table characteristic response message of the parameter carrying stream statistical power is sent to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; Second processing unit, for comprising concrete stream table property request and individual features parameter in stream table feature request message, and OF switch is determined to support to modify in situation to individual features parameter, according to concrete stream table property request amendment individual features parameter, and the stream table characteristic response message of carrying amended individual features parameter is sent to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
Pass through the present invention, adopt OF controller to OF switch query or the stream statistical power parameter arranging its each stream table, and the negotiation mode whether mark instruction OF switch performs the stream statistical function of this stream entry is set further in the stream entry issued to OF switch, the stream statistical function Control granularity solved in correlation technique on OF switch is excessively thick, can not the scarcity of resources of flexible adaptation forwarding unit or the problem of hard-wired restriction, the stream statistical power of OF switch can be refine to comparatively fine granularity further, and then reach the effect of the flexibility strengthening hardware or the adaptive OpenFlow flow table pipeline forwarding of chip.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the OpenFlow protocol application Organization Chart according to correlation technique;
Fig. 2 is by OpenFlow process pipeline according to the message flow of correlation technique;
Fig. 3 according in correlation technique based on the Message processing that each stream is shown;
Fig. 4 is the machinery of consultation flow chart of the stream statistical power according to the embodiment of the present invention one;
Fig. 5 is the structured flowchart of the consulting device of stream statistical power according to the embodiment of the present invention one;
Fig. 6 is the structured flowchart of the consulting device of preferred stream statistical power according to the embodiment of the present invention one;
Fig. 7 is the machinery of consultation flow chart of the stream statistical power according to the embodiment of the present invention two;
Fig. 8 is the structured flowchart of the consulting device of stream statistical power according to the embodiment of the present invention two;
Fig. 9 is the structured flowchart of the consulting device of preferred stream statistical power according to the embodiment of the present invention two;
Figure 10 be according to the preferred embodiment of the invention OF switch to the flow chart of the stream statistical power of OF controller report stream table;
Figure 11 be according to the preferred embodiment of the invention OF controller to the flow chart of the stream statistical power of OF switch configuration stream table;
Figure 12 is that OF switch adds up the flow chart of request error reason to OF controller stream of reply according to the preferred embodiment of the invention; And
Figure 13 is that OF controller sends the flow chart of stream table clause amendment message to OF switch according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Embodiments provide a kind of machinery of consultation of flowing statistical power, OF controller side can be applied to.Fig. 4 is the machinery of consultation flow chart of the stream statistical power according to the embodiment of the present invention one, and as indicated at 4, the method mainly comprises the following steps (step S402-step S406):
Step S402, OF controller sends the stream entry amendment message for stream table to OF switch;
Step S404, when OF switch meets the amendment condition of stream entry amendment message, OF controller instruction OF switch adds according to amendment condition or amendment flows entry accordingly, and whether performs the stream statistical function of stream entry by the mark instruction OF switch in stream entry amendment message;
Step S406, for the stream entry performing stream statistical function, OF controller sends stream statistics request message to inquire about the traffic statistics of stream entry to OF switch.
By each step above-mentioned, when determining that OF switch possesses the stream statistical power supporting respective streams table, OF controller can arrange the stream statistical function whether mark instruction OF switch performs this stream entry further in the stream entry issued to OF switch, by such mode, the stream statistical power of OF switch can be refine to more fine granularity further, and then the flexibility of OF exchange hardware or the adaptive OpenFlow flow table pipeline forwarding of forwarding chip can be strengthened.
In the present embodiment, before the stream entry amendment message that OF controller is shown to the transmission of OF switch for stream, OF controller can receive the parameter of the stream statistical power that OF switch reports, wherein, parameter is by OF switch when receiving the stream table feature request message that OF interchanger sends, and convection current table feature request message sends to OF controller after making a concrete analysis of.
In the present embodiment, the concrete analysis that OF switch convection current table feature request message is carried out comprises: if stream table feature request message does not comprise concrete stream table property request, OF switch determines the stream table characteristic response message sending the parameter carrying stream statistical power to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; If stream table feature request message comprises concrete stream table property request and individual features parameter, OF switch is under determining to support situation of modifying to individual features parameter, determine according to concrete stream table property request amendment individual features parameter and send the stream table characteristic response message of carrying amended individual features parameter to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
In actual applications, OF switch is after the stream table feature request message receiving the transmission of OF controller, can to reply the stream statistical power of mode to OF controller report stream table of the stream statistical power mark carrying stream table in message in the stream table feature of response, wherein, namely the stream statistical power of stream table represents: whether OF switch upper reaches table is the counter that the stream entry of this stream table is assigned with the data such as accounting message byte number/message number, i.e. the message byte number/message number of each stream entry of statistical match.Certainly, before reporting, OF switch can carry out according to the stream statistical power mark of stream table the stream statistics whether decision-making performs stream table.If OF switch cannot perform the stream statistical power mark of described stream table, then can return error message to OF controller, alternatively, error reason can be carried in this error message.
In the present embodiment, OF controller to OF switch send stream statistics request message with statistic fluid bar target flow after, OF controller can receive OF switch send stream statistics response message.
In actual applications, if OF controller determines that OF switch can meet stream table clause amendment request (stream table clause amendment message), then can to the stream statistics request marks of OF switch configuration stream table clause, wherein, can carry the stream statistics request marks of stream table mark, stream table clause and stream table clause in stream table clause amendment message, stream statistics request marks is used to indicate described stream table clause the need of carrying out flowing statistics.
In actual applications, when OF switch can meet the stream statistics request of stream entry, or when there is not any conflict in stream table clause amendment message parameter, OF controller can also issue stream statistics request message (wherein carrying the parameter such as stream table number, stream entry) to OF switch further, and this stream statistics request message may be used for asking OF switch statistic data to mate the message byte number/message number of described stream entry.Certainly, if the stream statistical power of stream table do not supported by stream table (being identified by stream table number), then OF switch can send error message (can carry error reason, such as specific type of error and error coded) to OF controller.
In the present embodiment, when OF switch cannot meet the amendment condition of stream entry amendment message, such as, stream entry amendment message carries the stream statistical function that mark requires this stream entry of OF switch, but OF switch finds that the stream table at this stream entry place is not supported to flow statistical function, and OF controller receives the first error message that OF switch sends; The stream table property request message of carrying the requirement of stream statistical power parameter modification is received at OF switch, and when cannot support that convection current statistical power parameter is modified, such as, the hardware of OF switch determines the stream table that this stream table property request message specifies and does not support to flow statistical function, and OF controller receives the second error message carrying error reason that OF switch sends; Receive at OF switch and flow statistics request message, and when determining that the stream table at not convection current entry execution stream statistical function or stream entry place is not supported to flow statistical function, OF controller receives the 3rd error message of OF switch transmission.
In actual applications, OF switch, after reception stream table clause amendment message, can carry out according to the stream statistical power mark of the stream statistics request marks of stream table clause and this stream table the stream statistical function whether decision-making performs stream table clause.If OF switch cannot meet the stream statistics request of stream entry, or the conflict of stream table clause amendment message parameter (such as, stream statistics request marks is set to 0, namely controller indicates this entry not perform statistics, but the idle ageing time arranged is not 0), then can return error message to OF controller, alternatively, in this error message, can error reason be carried.
In actual applications, the content of stream entry amendment message can comprise: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, stream statistics request marks is used to indicate stream table clause the need of carrying out stream statistics; Message byte number and/or the message number of stream statistics request message for asking OF switch statistic data to be matched with stream entry, stream statistics request message comprises: stream table number and stream item retrievals key assignments.
The embodiment of the present invention additionally provides a kind of consulting device flowing statistical power.Fig. 5 is the structured flowchart of the consulting device of stream statistical power according to the embodiment of the present invention one, this device is positioned at OF controller, in order to realize the machinery of consultation of the stream statistical power that above-described embodiment one provides, as shown in Figure 5, this device mainly comprises: the first sending module 10, second sending module 20 and the 3rd sending module 30.Wherein, the first sending module 10, for sending the stream entry amendment message for stream table to OF switch, wherein, stream entry amendment message carries the mark whether instruction OF switch performs the stream statistical function of stream entry; Refer to the second sending module 20, for for the stream entry performing stream statistical function, send stream statistics request message to inquire about the traffic statistics of stream entry to OF switch; 3rd sending module 30, for sending stream table feature request message to OF switch with inquiry or the characteristic parameter arranging OF switch appointment stream table, wherein, characterisitic parameter comprises the parameter of stream statistical power.
In the present embodiment, the content of stream entry amendment message can comprise: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, stream statistics request marks is used to indicate stream table clause the need of carrying out stream statistics; Message byte number and/or the message number of stream statistics request message for asking OF switch statistic data to be matched with stream entry, stream statistics request message comprises: stream table number and stream item retrievals key assignments.
Fig. 6 is the structured flowchart of the consulting device of preferred stream statistical power according to the embodiment of the present invention one, and as shown in Figure 6, this consulting device preferably flowing statistical power also comprises:
First receiver module 40, before sending stream entry amendment message at the first sending module 10 to OF switch, receive the parameter of the stream statistical power that OF switch reports, wherein, parameter is by OF switch when receiving the stream table feature request message that the 3rd sending module 30 sends, and convection current table feature request message sends to OF controller after making a concrete analysis of.
Second receiver module 50, after sending stream statistics request message at the second sending module to OF switch, receives the stream statistics response message that OF switch sends.
3rd receiver module 60, for cannot meet the amendment condition flowing entry amendment message at OF switch, receives the first error message that OF switch sends; 4th receiver module 70, for receiving the stream table property request message of carrying the requirement of stream statistical power parameter modification at OF switch, and when cannot support that convection current statistical power parameter is modified, receive the second error message carrying error reason that OF switch sends; 5th receiver module 80, for receiving stream statistics request message at OF switch, and when determining that the stream table at not convection current entry execution stream statistical function or stream entry place is not supported to flow statistical function, OF controller receives the 3rd error message of OF switch transmission.
Embodiments provide a kind of machinery of consultation of flowing statistical power, OF exchanger side can be applied to, Fig. 7 is the machinery of consultation flow chart of the stream statistical power according to the embodiment of the present invention two, and as shown in Figure 7, the method mainly comprises the following steps (step S702-step S706):
Step S702, OF switch receives the stream entry amendment message for stream table that OF controller sends;
Step S704, when the amendment condition of satisfied stream entry amendment message, OF switch adds according to amendment condition or amendment flows entry accordingly, and determines whether according to the mark instruction in stream entry amendment message the stream statistical function performing stream entry;
Step S706, OF switch receives the stream statistics request message that OF controller sends, stream of reply statistics response message, and wherein, stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
In the present embodiment, before receiving the stream entry amendment message for stream table of OF controller transmission, OF switch can receive the stream table feature request message that OF interchanger sends, and after convection current table feature request message makes a concrete analysis of, to the parameter of OF controller report stream statistical power.
In the present embodiment, the concrete analysis that OF switch convection current table feature request message is carried out comprises: if stream table feature request message does not comprise concrete stream table property request, OF switch can send the stream table characteristic response message of the parameter carrying stream statistical power to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; If stream table feature request message comprises concrete stream table property request and individual features parameter, OF switch can under determining to support situation of modifying to individual features parameter, according to concrete stream table property request amendment individual features parameter, and the stream table characteristic response message of carrying amended individual features parameter is sent to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
The embodiment of the present invention additionally provides a kind of consulting device flowing statistical power.Fig. 8 is the structured flowchart of the consulting device of stream statistical power according to the embodiment of the present invention two, this device is positioned at OF switch, in order to realize the machinery of consultation of the stream statistical power that above-described embodiment two provides, as shown in Figure 8, this device mainly comprises: the first processing module 10, second processing module 20 and the 3rd processing module 30.
Wherein, the first processing module 10, for receiving the amendment of the stream entry for the stream table message that OF controller sends; Second processing module 20, for meeting the amendment condition flowing entry amendment message at OF switch, add according to amendment condition or revise and flow entry accordingly, and determine whether to perform the stream statistical function flowing entry according to the mark instruction in stream entry amendment message; 3rd processing module 30, for receiving the stream statistics request message that OF controller sends, and stream of reply statistics response message, wherein, stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
Fig. 9 is the structured flowchart of the consulting device of preferred stream statistical power according to the embodiment of the present invention two, as shown in Figure 9, this consulting device preferably flowing statistical power also comprises: the 4th processing module 40, for receive stream entry amendment message in the first processing module 10 before, receive the stream table feature request message that OF interchanger sends, and after convection current table feature request message makes a concrete analysis of, specify the stream table characterisitic parameter of stream table to OF controller report, stream table characterisitic parameter comprises the parameter of stream statistical power.
Further, 4th processing module 40 comprises: the first processing unit 42, for when stream table feature request message does not comprise concrete stream table property request, the stream table characteristic response message of the parameter carrying stream statistical power is sent to OF controller, wherein, whether the parameter flowing statistical power is used to indicate stream table and supports to flow statistical function; Second processing unit 44, for comprising concrete stream table property request and individual features parameter in stream table feature request message, and OF switch is determined to support to modify in situation to individual features parameter, according to concrete stream table property request amendment individual features parameter, and the stream table characteristic response message of carrying amended individual features parameter is sent to OF controller, wherein, individual features parameter comprises the parameter of stream statistical power.
The machinery of consultation of the stream statistical power adopting above-described embodiment to provide and device, can refine to comparatively fine granularity further by the stream statistical power of OF switch, reaches the effect of the flexibility strengthening hardware or the adaptive OpenFlow flow table pipeline forwarding of chip.
The machinery of consultation of the stream statistical power provided below in conjunction with Figure 10 to Figure 13 and preferred embodiment 1 to preferred embodiment 4 pairs of above-described embodiments is described in detail more.
Preferred embodiment 1
Figure 10 is that OF switch is to the flow chart of the stream statistical power of OF controller report stream table according to the preferred embodiment of the invention, and as shown in Figure 10, this flow process comprises the following steps:
S1002, OF controller sends Table Features Request(stream table feature to OFLS) request message; When this request message is empty, this message is used for inquiring about the feature/ability shown at OFLS upper reaches.
S1004, OFLS reply Table Features Reply(stream table feature to OF controller) reply message, wherein, in this message, carry the stream statistical power mark of stream table.
Particularly, this message can use structure struct ofp_table_features to define, as follows, ability parameter (capabilities) is comprised in this structure, and this parameter uses enumeration type enum ofp_table_config to represent, in this enumeration type, comprise the stream statistical power mark OFPTC_FLOW_STATS of stream table, this value is set to 1, represents that the stream statistical power of stream table supported by described stream table.
Preferred embodiment 2
Figure 11 is that OF controller is to the flow chart of the stream statistical power of OF switch configuration stream table according to the preferred embodiment of the invention, and as shown in figure 11, this flow process comprises the following steps:
S1102, OF controller sends Table Features Request(stream table feature to OFLS) request message; When carrying the feature/ability parameter of stream table in this request message, this message is used for arranging the described feature/ability shown at OFLS upper reaches.
S1104, if this message carries the stream statistical power mark of stream table number and stream table, then whether OFLS performs the stream statistics (as closed or opening) of stream table according to the stream voting plan that stream statistical power mark (value is 0 or 1) convection current table number of stream table points to.
Particularly, this message can use structure struct ofp_table_features to define, as follows, ability parameter (capabilities) is comprised in this structure, and this parameter uses enumeration type enum ofp_table_config to represent, in this enumeration type, comprise the stream statistical power mark OFPTC_FLOW_STATS of stream table, this value is set to 1, represents and arranges the stream statistical power that stream table supported by described stream table.
OFLS replys Table Features Reply(stream table feature to OF controller) reply message, for controlling to confirm to OF.If OF switch cannot perform the stream statistical power mark of described stream table, then return error message to OF controller, alternatively, carry error reason (as the stream statistical power of stream table do not supported by current stream table) error reason available error type, error code realizes.
Preferred embodiment 3
Figure 12 is that OF switch is to the flow chart of OF controller stream of reply statistics request error reason according to the preferred embodiment of the invention, and as shown in figure 12, this flow process comprises:
S1202, OF controller sends Flow Statistics stream statistics request message (as OFPMP_FLOW multipart request or OFPMP_AGGREGATE multipart request message) to OF switch, wherein carry the parameter such as stream table number, stream entry, for the message byte number/message number of asking OF switch statistic data to mate described stream entry.
S1202, if the stream statistical power of stream table do not supported by described stream table (being identified by stream table number), then OF switch sends error message to OF, alternatively, carries error reason (available error type, error code realize).
Preferred embodiment 4
Figure 13 is that OF controller sends the flow chart of stream table clause amendment message to OF switch according to the preferred embodiment of the invention, and as shown in figure 13, this flow process comprises the following steps:
S1302, OF controller sends stream table clause amendment (Flow Table Modification) message to OF switch, wherein carries the stream statistics request marks of stream table mark, stream table clause and stream table clause.Wherein stream statistics request marks is used to refer to described stream table clause the need of carrying out stream statistics.
Particularly, this message can use structure ofp_flow_mod to define, as follows, flags parameters (flags) is comprised in this structure, and this parameter uses enumeration type enum ofp_flow_mod_flags to represent, in this enumeration type, comprise the stream statistics request marks OFPTT_FLOW_STATS of stream table, this value is set to 1, represents and requires that described stream entry performs stream statistical function.
Further, OF switch carrys out according to the stream statistics request marks of stream table clause and the stream statistical power mark of this stream table the stream statistical function whether decision-making performs stream table clause.If OF switch cannot meet the stream statistics request of described stream entry, or the conflict of stream table clause amendment message parameter (is such as flowed statistics request marks and is set to 0, namely controller indicates this entry not perform statistics, but the idle ageing time arranged is not 0), then return error message to OF controller, wherein, this error message carries error reason.
From above description, can find out, present invention achieves following technique effect: adopt OF controller to OF switch query or the stream statistical power parameter arranging its each stream table, and the negotiation mode whether mark instruction OF switch performs the stream statistical function of this stream entry is set further in the stream entry issued to OF switch, the stream statistical function Control granularity solved in correlation technique on OF switch is excessively thick, can not the scarcity of resources of flexible adaptation forwarding unit or the problem of hard-wired restriction, the stream statistical power of OF switch can be refine to comparatively fine granularity further, and then reach the effect of the flexibility strengthening hardware or the adaptive OpenFlow flow table pipeline forwarding of chip.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. flow a machinery of consultation for statistical power, be applied to OF controller side, it is characterized in that, comprising:
OF controller sends the stream entry amendment message for stream table to OF switch;
When described OF switch meets the amendment condition of described stream entry amendment message, described OF controller indicates described OF switch to add according to described amendment condition or amendment flows entry accordingly, and indicates described OF switch whether to perform the stream statistical function of described stream entry by the mark in described stream entry amendment message;
For the described stream entry performing stream statistical function, described OF controller sends stream statistics request message to inquire about the traffic statistics of described stream entry to described OF switch.
2. method according to claim 1, is characterized in that, before the stream entry amendment message that OF controller is shown to described OF switch transmission for described stream, comprising:
Described OF controller receives the parameter of the described stream statistical power that described OF switch reports, wherein, described parameter is by described OF switch when receiving the stream table feature request message that described OF interchanger sends, and to described OF controller sends after making a concrete analysis of to described stream table feature request message.
3. method according to claim 2, is characterized in that, described OF switch comprises the described concrete analysis that described stream table feature request message is carried out:
If described stream table feature request message does not comprise concrete stream table property request, described OF switch determines to send to described OF controller the stream table characteristic response message carrying the parameter of described stream statistical power, wherein, the parameter of described stream statistical power is used to indicate described stream table and whether supports stream statistical function;
If described stream table feature request message comprises concrete stream table property request and individual features parameter, described OF switch is under determining to support situation of modifying to individual features parameter, determine revise described individual features parameter according to described stream table property request specifically and send the stream table characteristic response message of carrying amended individual features parameter to described OF controller, wherein, described individual features parameter comprises the parameter of described stream statistical power.
4. method according to claim 1, is characterized in that, to send stream statistics request message with after adding up described stream bar target flow, comprising at described OF controller to described OF switch:
Described OF controller receives the stream statistics response message that described OF switch sends.
5. method according to claim 3, is characterized in that, described method also comprises:
When described OF switch cannot meet the amendment condition of described stream entry amendment message, described OF controller receives the first error message that described OF switch sends;
The stream table property request message of carrying the requirement of described stream statistical power parameter modification is received at described OF switch, and when cannot support to modify to described stream statistical power parameter, described OF controller receives the second error message carrying error reason that described OF switch sends;
Stream statistics request message is received at described OF switch, and when determining that the stream table not flowing statistical function or described stream entry place to described stream entry execution is not supported to flow statistical function, described OF controller receives the 3rd error message that described OF switch sends.
6. method according to any one of claim 1 to 5, is characterized in that,
The content of described stream entry amendment message comprises: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, described stream statistics request marks is used to indicate described stream table clause the need of carrying out stream statistics;
Message byte number and/or the message number of described stream statistics request message for asking described OF switch statistic data to be matched with stream entry, described stream statistics request message comprises: stream table number and stream item retrievals key assignments.
7. flow a machinery of consultation for statistical power, be applied to OF exchanger side, it is characterized in that, comprising:
OF switch receives the stream entry amendment message for stream table that OF controller sends;
When meeting the amendment condition of described stream entry amendment message, described OF switch adds according to described amendment condition or amendment flows entry accordingly, and determines whether according to the mark instruction in described stream entry amendment message the stream statistical function performing described stream entry;
Described OF switch receives the stream statistics request message that described OF controller sends, stream of reply statistics response message, and wherein, described stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
8. method according to claim 7, is characterized in that, before receiving the stream entry amendment message for described stream table of described OF controller transmission, comprising:
Described OF switch receives the stream table feature request message that described OF interchanger sends, and after described stream table feature request message is made a concrete analysis of, to the parameter flowing statistical power described in described OF controller report.
9. method according to claim 8, is characterized in that, described OF switch comprises the described concrete analysis that described stream table feature request message is carried out:
If described stream table feature request message does not comprise concrete stream table property request, described OF switch sends the stream table characteristic response message carrying the parameter of described stream statistical power to described OF controller, wherein, the parameter of described stream statistical power is used to indicate described stream table and whether supports stream statistical function;
If described stream table feature request message comprises concrete stream table property request and individual features parameter, described OF switch is under determining to support situation of modifying to individual features parameter, described individual features parameter is revised according to described stream table property request specifically, and the stream table characteristic response message of carrying amended individual features parameter is sent to described OF controller, wherein, described individual features parameter comprises the parameter of described stream statistical power.
10. flow a consulting device for statistical power, be positioned at OF controller, it is characterized in that, comprising:
First sending module, for sending the stream entry amendment message for stream table to OF switch, wherein, described stream entry amendment message carries the mark whether described OF switch of instruction performs the stream statistical function of described stream entry;
Second sending module, for for the described stream entry performing stream statistical function, sends stream statistics request message to inquire about the traffic statistics of described stream entry to described OF switch;
3rd sending module, for sending stream table feature request message to described OF switch with inquiry or the characteristic parameter arranging described OF switch appointment stream table, wherein, described characterisitic parameter comprises the parameter of described stream statistical power.
11. devices according to claim 10, is characterized in that, described device also comprises:
First receiver module, before sending described stream entry amendment message at described first sending module to described OF switch, receive the parameter of the described stream statistical power that described OF switch reports, wherein, described parameter be by described OF switch when receiving the stream table feature request message that described 3rd sending module sends, send to described OF controller after described stream table feature request message is made a concrete analysis of.
12. devices according to claim 10, is characterized in that, described device also comprises:
Second receiver module, after sending described stream statistics request message at described second sending module to described OF switch, receives the stream statistics response message that described OF switch sends.
13. devices according to claim 12, is characterized in that, described device also comprises:
3rd receiver module, for cannot meet at described OF switch described stream entry amendment message amendment condition, receive described OF switch send the first error message;
4th receiver module, for receiving the stream table property request message of carrying the requirement of described stream statistical power parameter modification at described OF switch, and when cannot support to modify to described stream statistical power parameter, receive the second error message carrying error reason that described OF switch sends;
5th receiver module, for receiving stream statistics request message at described OF switch, and when determining that the stream table not flowing statistical function or described stream entry place to described stream entry execution is not supported to flow statistical function, described OF controller receives the 3rd error message that described OF switch sends.
14., according to claim 10 to the device according to any one of 13, is characterized in that,
The content of described stream entry amendment message comprises: the stream statistics request marks of stream table mark, stream table clause and stream table clause, and wherein, described stream statistics request marks is used to indicate described stream table clause the need of carrying out stream statistics;
Message byte number and/or the message number of described stream statistics request message for asking described OF switch statistic data to be matched with stream entry, described stream statistics request message comprises: stream table number and stream item retrievals key assignments.
15. 1 kinds of consulting devices flowing statistical power, are positioned at OF switch, it is characterized in that, comprising:
First processing module, for receiving the amendment of the stream entry for the stream table message that OF controller sends;
Second processing module, for meet at OF switch described stream entry amendment message amendment condition, add according to described amendment condition or revise and flow entry accordingly, and determine whether according to the mark instruction in described stream entry amendment message the stream statistical function performing described stream entry;
3rd processing module, for receiving the stream statistics request message that described OF controller sends, and stream of reply statistics response message, wherein, described stream statistics response message carries the traffic statistics of the stream entry supporting stream statistical function.
16. devices according to claim 15, is characterized in that, described device also comprises:
4th processing module, for receive described stream entry amendment message in described first processing module before, receive the stream table feature request message that described OF interchanger sends, and after described stream table feature request message is made a concrete analysis of, specify the stream table characterisitic parameter of stream table to described OF controller report, described stream table characterisitic parameter comprises the parameter of described stream statistical power.
17. devices according to claim 16, is characterized in that, described 4th processing module comprises:
First processing unit, for when described stream table feature request message does not comprise concrete stream table property request, the stream table characteristic response message carrying the parameter of described stream statistical power is sent to described OF controller, wherein, the parameter of described stream statistical power is used to indicate described stream table and whether supports stream statistical function;
Second processing unit, for comprising concrete stream table property request and individual features parameter in described stream table feature request message, and described OF switch is determined to support to modify in situation to individual features parameter, described individual features parameter is revised according to described stream table property request specifically, and the stream table characteristic response message of carrying amended individual features parameter is sent to described OF controller, wherein, described individual features parameter comprises the parameter of described stream statistical power.
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