CN104734994A - Traffic label control method based on SDN (software-defined network) frame - Google Patents
Traffic label control method based on SDN (software-defined network) frame Download PDFInfo
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Abstract
The invention discloses a traffic label control method based on an SDN (software-defined network) frame. The method includes S1, setting traffic label rules according to a northbound interface; S2, allowing an SDN controller to receive Packet_in information carrying a message; S3, allowing the SDN controller to analyze statistical traffic sequence of the message and match the traffic label rules; S4, allowing the SDN controller to centrally distributing a traffic table to a whole forwarding path according to matching results; S5, filling traffic labels in the message, packaging the message in Packet_out information, and transmitting the Packet_out information to a next SDN switch; S6, allowing the SND switch to forward IPv6 data according to the traffic table. The method has the advantages that by labelling the sequence of the corresponding traffic through high 12 bits of the traffic label, the SDN switch can feed the sequence of the corresponding flow back to the SDN controller through OF information, and thus the SDN controller can monitor whole-network traffic in real time.
Description
Technical field
The present invention relates to the application of stream label in the communications field, particularly a kind of stream label control method based on SDN framework.
Background technology
The function of stream can provide service based on QoS for people, and this is different from the service concept " transmitted as possible " in IPv4, and is obviously better than the latter.Stream label is used to carry out dividing flow state in Differentiated Services (Differentiated Services).The definition of IPv6 specification convection current (Flow) is: stream is the packet sequence mailing to specific purpose node from particular source node, and source node wishes that intermediate router can carry out special process to this packet sequence.
Traditional be carry out Qos scheduling according to the VLAN Priority field of 3bits based on VLAN QoS algorithm inside double layer network, such as: SP(absolute priority), WRR(WRR).
Traditional QoS algorithm inside three-layer network can based on IP dscp field.DSCP provides 6 bit fields for QoS marker, and this 6 bit field is 3 identical with IP priority, 3 that add ensuing tos field.Therefore, the scope of DSCP value is 0 to 63.
No matter that the number of the priority provided is no more than 8 or 64 based on the QoS algorithm based on IP DSCP inside the QoS algorithm of VLAN or three-layer network inside traditional double layer network.
Traditional QoS algorithm is all be configured on single forwarding unit and apply, and cannot realize QoS application end to end.
Summary of the invention
The object of this invention is to provide a kind of stream label control method based on SDN framework, by the sequence of the corresponding stream of high 12 marks of stream label, SDN switch can configure according to user, adopt OF message the sequence feedback of correspondence stream to SDN controller, thus controller can monitor the whole network flow in real time.
In order to realize above object, the present invention is achieved by the following technical solutions:
Based on a stream label control method for SDN framework, be characterized in, the method comprises following steps:
S1, arranges stream label rule according to northbound interface;
S2, SDN controller receives the Packet_in message of carrying message;
The stream label rule of S3, SDN controller analytic message statistic fluid sequence also described in coupling;
S4, SDN controller issues stream according to matching result unification and shows whole forward-path;
S5, fills stream label in described message, and is encapsulated in Packet_out message, is submitted to next SDN switch and forwards;
S6, SND switch forwards IPv6 data according to stream table.
The sequence of the corresponding stream of high-order mark in described stream label, the priority of its low numbered indicia correspondence stream.
Described step S3 comprises:
S3.1, SDN controller analytic message statistic fluid sequence from Packet_in message;
S3.2, SDN controller obtains source IPv6 address information and L4 port information, and inquires about stream label rule;
S3.3, SDN controller detects whether mate stream label rule, if coupling stream label rule, then performs S3.4, if do not mate stream label rule, then performs S3.5;
S3.4, SDN controller obtains the flow label values in stream label rule;
Flow label values in stream label rule is set to 1 by S3.5, SDN controller.
Described step S6 comprises:
S6.1, SDN switch is according to IPv6 address, source and L4 port numbers inquiry stream table;
S6.2, SDN switch detects whether mate stream table, if coupling stream table, then obtains fail to be sold at auction sign and queue id, and performs S6.3, if coupling stream table, then performs S6.4;
S6.3, described SDN switch, according to sign of failing to be sold at auction, performs the action of stream table;
S6.4, described message is packaged into Packet_in message and feeds back to SDN controller by SDN switch.
Described stream table action is enter corresponding QoS queue scheduling.
Described QoS queue scheduling at least supports absolute priority pattern, poll pattern or WRR pattern.
Also comprise after described step S4: perform this step of QoS queue scheduling.
Described flow label values comprises fail to be sold at auction sign and queue id.
If described stream label rule is mated, then described source IPv6 address information and L4 port information are written to the Match field of stream table.
The present invention compared with prior art, has the following advantages:
Usage and the semanteme of convection tags of the present invention give clear and definite definition, and the priority number provided can reach 256;
The stream label that the present invention is based on SDN framework intensively configures on the controller and manages, and reasonably can configure qos policy according to user's request;
The present invention is by the sequence of the corresponding stream of high 12 marks of stream label, and SDN switch can configure according to user, adopt OF message the sequence feedback of correspondence stream to controller, thus controller can monitor the whole network flow in real time.
Accompanying drawing explanation
Fig. 1 is stream label form schematic diagram of the present invention;
Fig. 2 is the flow chart of a kind of stream label control method based on SDN framework of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Figure 2, a kind of stream label control method based on SDN framework, the method comprises following steps:
S1, arranges stream label rule according to northbound interface;
S2, SDN controller receives the Packet_in message of carrying message;
The stream label rule of S3, SDN controller analytic message statistic fluid sequence also described in coupling;
S4, SDN controller issues stream according to matching result unification and shows whole forward-path;
S5, fills stream label in described message, and is encapsulated in Packet_out message, is submitted to next SDN switch and forwards;
S6, SND switch forwards IPv6 data according to stream table.
Fig. 1 is stream label form schematic diagram, the sequence of the corresponding stream of high 12 marks in wherein said stream label, the priority of the corresponding stream of its least-significant byte mark.
Particularly, described step S3 comprises:
S3.1, SDN controller analytic message statistic fluid sequence from Packet_in message;
S3.2, SDN controller obtains source IPv6 address information and L4 port information, and inquires about stream label rule;
S3.3, SDN controller detects whether mate stream label rule, if coupling stream label rule, then performs S3.4, if do not mate stream label rule, then performs S3.5;
S3.4, SDN controller obtains the flow label values in stream label rule;
Flow label values in stream label rule is set to 1 by S3.5, SDN controller.
Above-mentioned flow label values comprises fail to be sold at auction sign and queue id.
Particularly, described step S6 comprises:
S6.1, SDN switch is according to IPv6 address, source and L4 port numbers inquiry stream table;
S6.2, SDN switch detects whether mate stream table, if coupling stream table, then obtains fail to be sold at auction sign and queue id, and performs S6.3, if coupling stream table, then performs S6.4;
S6.3, described SDN switch, according to sign of failing to be sold at auction, performs the action of stream table;
S6.4, described message is packaged into Packet_in message and feeds back to SDN controller by SDN switch.
Described stream table action is enter corresponding QoS queue scheduling.
Described QoS queue scheduling at least supports absolute priority (SP) pattern, poll (RR) pattern or weighting (WRR) poll pattern.
In a particular embodiment, also comprise after step S4: perform this step of QoS queue scheduling.
Stream label rule list be safeguarded and be inquired about to SDN controller will.IPv6 address, source and L4 port numbers are using the search index as whole table, if described stream label rule is mated, then described source IPv6 address information and L4 port information are written to the Match field of stream table.
Fail to be sold at auction the codomain of sign from 1 to 255, and the larger priority of value of sign of failing to be sold at auction is higher.
SDN switch needs support 255 hardware queues, and numbering is also from 1 to 255.Default queue number is consistent with sign of failing to be sold at auction.User according to practical application, can revise its binding relationship.Under SP pattern, queue 255 will have limit priority, by the message in this queue of priority scheduling.Under RR pattern, the priority of all queues is the same, and equality is dispatched.Under WRR pattern, refer between 255 queues, carry out the message of round-robin scheduling individual queue according to the weights of configuration.The WRR weights of such as 4 queues are respectively 10,10,20,20, then individual queue has the chance of 1/6,1/6,1/3,1/3 to send message respectively.
In sum, a kind of stream label control method based on SDN framework of the present invention, by the sequence of the corresponding stream of high 12 marks of stream label, SDN switch can configure according to user, adopt OF message the sequence feedback of correspondence stream to SDN controller, thus controller can monitor the whole network flow in real time.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (9)
1., based on a stream label control method for SDN framework, it is characterized in that, the method comprises following steps:
S1, arranges stream label rule according to northbound interface;
S2, SDN controller receives the Packet_in message of carrying message;
The stream label rule of S3, SDN controller analytic message statistic fluid sequence also described in coupling;
S4, SDN controller issues stream according to matching result unification and shows whole forward-path;
S5, fills stream label in described message, and is encapsulated in Packet_out message, is submitted to next SDN switch and forwards;
S6, SND switch forwards IPv6 data according to stream table.
2. as claimed in claim 1 based on the stream label control method of SDN framework, it is characterized in that, the sequence of the corresponding stream of high-order mark in described stream label, the priority of its low numbered indicia correspondence stream.
3., as claimed in claim 1 based on the stream label control method of SDN framework, it is characterized in that, described step S3 comprises:
S3.1, SDN controller analytic message statistic fluid sequence from Packet_in message;
S3.2, SDN controller obtains source IPv6 address information and L4 port information, and inquires about stream label rule;
S3.3, SDN controller detects whether mate stream label rule, if coupling stream label rule, then performs S3.4, if do not mate stream label rule, then performs S3.5;
S3.4, SDN controller obtains the flow label values in stream label rule;
Flow label values in stream label rule is set to 1 by S3.5, SDN controller.
4. the stream label control method based on SDN framework as described in claim 1 or 3, it is characterized in that, described step S6 comprises:
S6.1, SDN switch is according to IPv6 address, source and L4 port numbers inquiry stream table;
S6.2, SDN switch detects whether mate stream table, if coupling stream table, then obtains fail to be sold at auction sign and queue id, and performs S6.3, if coupling stream table, then performs S6.4;
S6.3, described SDN switch, according to sign of failing to be sold at auction, performs the action of stream table;
S6.4, described message is packaged into Packet_in message and feeds back to SDN controller by SDN switch.
5. as claimed in claim 4 based on the stream label control method of SDN framework, it is characterized in that, described stream table action is enter corresponding QoS queue scheduling.
6., as claimed in claim 5 based on the stream label control method of SDN framework, it is characterized in that, described QoS queue scheduling at least supports absolute priority pattern, poll pattern or WRR pattern.
7. as claimed in claim 1 based on the stream label control method of SDN framework, it is characterized in that, also comprise after described step S4: perform this step of QoS queue scheduling.
8., as claimed in claim 3 based on the stream label control method of SDN framework, it is characterized in that, described flow label values comprises fail to be sold at auction sign and queue id.
9. as claimed in claim 3 based on the stream label control method of SDN framework, it is characterized in that, if described stream label rule is mated, then described source IPv6 address information and L4 port information are written to the Match field of stream table.
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| CN106656720A (en) * | 2016-10-31 | 2017-05-10 | 上海斐讯数据通信技术有限公司 | SDN-based IPv4 to IPv6 transition method and system |
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Application publication date: 20150624 |