CN104348757A

CN104348757A - Flow table interactive method, switch, and system

Info

Publication number: CN104348757A
Application number: CN201310329300.XA
Authority: CN
Inventors: 王永灿; 文白林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2015-02-11
Anticipated expiration: 2033-07-31
Also published as: CN104348757B; WO2015014177A1

Abstract

The embodiment of the invention discloses a flow table interactive method, a switch, and a system and relates to communication field. The flow table interactive method may reduce resource waste and system power consumption. The method comprises steps that the switch receives a flow table capability request message from a controller after connection is established between the switch and the controller; that the switch transmits a logic flow table to the controller in order that the controller configures at least one first flow table item used for indicating data packet forwarding strategy for the switch, wherein the logic flow table comprises the number of the flow tables prestored in the switch and the flow table capability of each prestored flow table; and that the switch receives at least one first flow table item transmitted from the controller and generates a physical flow table according to the at least one first flow table in order to forward a data packet according to the physical flow table after receiving the data packet.

Description

A kind of stream table exchange method, switch and system

Technical field

The present invention relates to the communications field, particularly relate to a kind of stream table exchange method, switch and system.

Background technology

Open Flow real-time performance data retransmission layer is separated with key-course.Wherein, Open Flow switch is for carrying out the forwarding of data Layer, and Controller is for realizing the function of key-course, and Controller passes through Open Flow protocol integrated test system Open Flow switch, to realize the centralized control to whole network.Concrete, Open Flow switch can receive the stream list item that Controller issues, and generate stream table according to stream list item, Open Flow switch is after receiving packet, the stream list item data packet matched with this is searched in the stream table that can store at Open Flow switch, and the packet forwarding strategy forwarding data bag corresponding according to this stream list item.Wherein, stream table comprises: essence joins table and wildcard table; The value of all matching domains in given stream list item in table is joined, the value of part matching domain in only given stream list item in wildcard table in essence.

Wherein, because a packet both can not support internet protocol version 4(Internet Protocol version4, IPv4), support IPv6 again; Both transmission control protocol (TransmissionControlProtocol had been supported, TCP), support again User Datagram Protocol (User Datagram Protocol, and SCTP (Stream Control Transmission Protocol UDP), SCTP), therefore, support that the stream table access of each agreement above-mentioned controls to adopt scheme one to realize: in a wildcard table, realize supporting that the stream table access of each agreement above-mentioned controls; Or, can scheme be adopted: join in table six essences and realize respectively supporting that the stream table access of each agreement above-mentioned controls.

Employing scheme one, wildcard table generally adopts three-state content addressing memory (Ternary Content Addressable Memory, TCAM) realize, the resource-constrained of Open Flow switch TCAM, and when adopting a wildcard table to realize supporting that the stream table access of each agreement above-mentioned controls, stream table matching domain is longer, and no matter whether there is matching domain under unified central planning, every bar stream list item needs the resource taking all matching domains, can there is the wasting of resources.

Employing scheme two, what multiple essence joined table realizes logic complexity, needs each essence of additional designs to join redirect between table and priority, and execution efficiency low (may need when tabling look-up to inquire about multiple stream tables), and then system power dissipation can be caused larger.

Summary of the invention

Embodiments of the invention provide a kind of stream table exchange method, switch and system, can reduce the wasting of resources, reduce system power dissipation simultaneously.

For achieving the above object, embodiments of the invention adopt following technical scheme:

The first aspect of the embodiment of the present invention, provides a kind of stream table exchange method, comprising:

After connecting with controller, receive the stream table capabilities request message from described controller;

Send logic flow table to described controller, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores, with make described controller according to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy;

Receive that described controller issues at least one described in first-class list item, and generate physical streams table, so that forward described packet according to described physical streams table after receiving packet according to list item first-class described at least one;

Wherein, described physical streams table comprises: at least one physical streams list item, and described physical streams list item comprises: network layer protocol indication information, the first public coupling thresholding, transport layer protocol indication information and the second public coupling thresholding; Described first public coupling thresholding is the public coupling thresholding of first network layer protocol and second network layer protocol, and described second public coupling thresholding is the public coupling thresholding of the first transport layer protocol, the second transport layer protocol and the 3rd transport layer protocol.

In conjunction with first aspect, in a kind of possible implementation, described logic flow table comprises: at least one logic flow list item, and described logic flow list item comprises: the coupling thresholding of the coupling thresholding of described network layer protocol indication information, described first network layer protocol, the coupling thresholding of described second network layer protocol, described transport layer protocol indication information, the coupling thresholding of described first transport layer protocol, described second transport layer protocol, the coupling thresholding of described 3rd transport layer protocol;

Wherein, in described logic flow table, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is zero; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is zero;

In described logic flow table, when described transport layer protocol indication information indicates described packet to be applicable to described first transport layer protocol, the coupling thresholding of described second transport layer protocol and the 3rd transport layer protocol is zero; When described transport layer protocol indication information indicates described packet to be applicable to described second transport layer protocol, the coupling thresholding of described first transport layer protocol and the 3rd transport layer protocol is zero; When described transport layer protocol indication information indicates described packet to be applicable to described 3rd transport layer protocol, the coupling thresholding of described first transport layer protocol and the second transport layer protocol is zero.

In conjunction with first aspect and above-mentioned possible implementation, in the implementation that another kind is possible, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described first network layer protocol in described logic flow table; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described second network layer protocol in described logic flow table;

When described transport layer protocol indication information indicates described packet to be applicable to described first transport layer protocol, the described second public coupling thresholding in described physical streams list item is the coupling thresholding of described first transport layer protocol in described logic flow table; When described transport layer protocol indication information indicates described packet to be applicable to described second transport layer protocol, the described second public coupling thresholding in described physical streams list item is the coupling thresholding of described second transport layer protocol in described logic flow table; When described transport layer protocol indication information indicates described packet to be applicable to described 3rd transport layer protocol, the described second public coupling thresholding in described physical streams list item is the coupling thresholding of described 3rd transport layer protocol in described logic flow table.

In conjunction with first aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described generate physical streams table according to first-class list item described at least one before, described method also comprises:

According to the legitimacy of described logic flow table look-up first-class list item described at least one;

Described according to list item generation physical streams table first-class described at least one, specifically comprise:

Described physical streams table is generated according to the described first-class list item meeting described legitimacy.

In conjunction with first aspect and above-mentioned possible implementation, in the implementation that another kind is possible, describedly after receiving packet, forward described packet according to described physical streams table, comprising:

After receiving described packet, search in described physical streams table and described data packet matched described physical streams list item;

If do not comprise in described physical streams table and described data packet matched described physical streams list item, then send stream list item request message to described controller, to make described controller be described packet configuration second list item according to described stream list item request message, described second list item is and described data packet matched stream list item;

Receive from the described second list item of described controller, and according to described logic flow table look-up the legitimacy of second list item;

Generate the physical streams list item corresponding with the described second list item meeting described legitimacy;

Described physical streams list item according to having generated forwards described packet.

In conjunction with first aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described stream table exchange method, also comprises:

According to physical streams table described in the physical streams entry updating that described and described second list item is corresponding.

If comprise in described physical streams table and described data packet matched described physical streams list item, then forward described packet according to described and described data packet matched described physical streams list item.

In conjunction with first aspect and above-mentioned possible implementation, in the implementation that another kind is possible, in described first-class list item or described second list item, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is arbitrary value; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is arbitrary value;

In described first-class list item or described second list item, when described transport layer protocol indication information indicates described packet to be applicable to described first transport layer protocol, the coupling thresholding of described second transport layer protocol and the 3rd transport layer protocol is arbitrary value; When described transport layer protocol indication information indicates described packet to be applicable to described second transport layer protocol, the coupling thresholding of described first transport layer protocol and the 3rd transport layer protocol is arbitrary value; When described transport layer protocol indication information indicates described packet to be applicable to described 3rd transport layer protocol, the coupling thresholding of described first transport layer protocol and the second transport layer protocol is arbitrary value.

The second aspect of the embodiment of the present invention, also provides a kind of switch, comprising:

Receiving element, for after connecting with controller, receives the stream table capabilities request message from described controller;

Transmitting element, for sending logic flow table to described controller, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores, with make described controller according to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy;

Described receiving element, also for receive that described controller issues at least one described in first-class list item;

Generation unit, for receive according to described receiving element at least one described in first-class list item generate physical streams table;

Described receiving element, also for receiving packet;

Retransmission unit, forwards described packet for the described physical streams table generated according to described generation unit after described receiving element receives described packet;

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described logic flow table comprises: at least one logic flow list item, and described logic flow list item comprises: the coupling thresholding of the coupling thresholding of described network layer protocol indication information, described first network layer protocol, the coupling thresholding of described second network layer protocol, described transport layer protocol indication information, the coupling thresholding of described first transport layer protocol, described second transport layer protocol, the coupling thresholding of described 3rd transport layer protocol;

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described first network layer protocol in described logic flow table; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described second network layer protocol in described logic flow table;

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described switch, also comprises:

Inspection unit, before generating physical streams table at described generation unit according to first-class list item described at least one, according to the legitimacy of described logic flow table look-up first-class list item described at least one;

Described generation unit, the described first-class list item meeting described legitimacy also for obtaining according to described inspection unit inspection generates described physical streams table.

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described retransmission unit, comprising:

Matching module, for after described receiving element receives described packet, searches and described data packet matched described physical streams list item in the described physical streams table that described generation unit generates;

Sending module, if determine not comprise in described physical streams table and described data packet matched described physical streams list item for described matching module, then send stream list item request message to described controller, to make described controller be described packet configuration second list item according to described stream list item request message, described second list item is and described data packet matched stream list item;

Receiver module, for receiving the described second list item from described controller, and according to described logic flow table look-up the legitimacy of second list item;

Generation module, for the physical streams list item that the described second list item generated with meet described legitimacy is corresponding;

Forwarding module, forwards described packet for the described physical streams list item generated according to described generation module.

Updating block, for physical streams table described in physical streams entry updating corresponding with described second list item described in generating according to described retransmission unit.

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, described forwarding module, if also determine to comprise in described physical streams table and described data packet matched described physical streams list item for described matching module, then forward described packet according to described and described data packet matched described physical streams list item.

In conjunction with second aspect and above-mentioned possible implementation, in the implementation that another kind is possible, in described first-class list item or described second list item, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is arbitrary value; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is arbitrary value;

The third aspect of the embodiment of the present invention, also provides a kind of stream table interactive system, comprising:

Switch, for after connecting with controller, receives the stream table capabilities request message from described controller; Send logic flow table to described controller, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores, with make described controller according to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy; Receive that described controller issues at least one described in first-class list item, and generate physical streams table, so that forward described packet according to described physical streams table after receiving packet according to list item first-class described at least one;

Controller, after being that described switch connects, sends stream table capabilities request message to described switch; Receive from the logic flow table of described switch, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores; According to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy; Send first-class list item described at least one to described switch, to make described switch generate physical streams table according to list item first-class described at least one, and then make described switch forward described packet according to described physical streams table after receiving packet.

In conjunction with the third aspect, in a kind of possible implementation, described controller also for receiving the described stream list item request message from described switch, and is described packet configuration second list item according to described stream list item request message;

Wherein, described stream list item request message is that described switch does not comprise and sends with during described data packet matched described physical streams list item in described physical streams table.

Stream table exchange method, switch and system that the embodiment of the present invention provides, after connecting with controller, receive the stream table capabilities request message of self-controller; Send logic flow table to controller, logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy; Receive at least one first-class list item that controller issues, and generate physical streams table, so that forward described packet according to physical streams table after receiving packet according at least one first-class list item.With prior art, adopt a wildcard table or six essences to join table realization and support that the wasting of resources that the stream table access of multiple agreement controls to cause or system power dissipation are compared more greatly, an essence comprising public matching domain can be generated according to logic flow list item and join table, i.e. physical streams list item, can the wasting of resources be reduced, reduce system power dissipation simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the one stream table interaction diagrams in the embodiment of the present invention 1;

Fig. 2 is the one stream table interaction diagrams in the embodiment of the present invention 2;

Fig. 3 is a kind of switch composition schematic diagram in the embodiment of the present invention 3;

Fig. 4 is the another kind of switch composition schematic diagram in the embodiment of the present invention 3;

Fig. 5 is the another kind of switch composition schematic diagram in the embodiment of the present invention 3;

Fig. 6 is the another kind of switch composition schematic diagram in the embodiment of the present invention 3;

Fig. 7 is a kind of switch composition schematic diagram in the embodiment of the present invention 4;

Fig. 8 is the one stream table interactive system composition schematic diagram in the embodiment of the present invention 5.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Various technology described herein can be used for various wireless communication system, such as current 2G, 3G communication system and next generation communication system, such as global system for mobile communications (GSM, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other these type of communication systems.

In conjunction with terminal and/or base station and/or base station controller, various aspect is described herein.

Subscriber equipment, can be wireless terminal also can be catv terminal, wireless terminal can be point to the equipment that user provides voice and/or data connectivity, has the portable equipment of wireless connecting function or is connected to other treatment facilities of radio modem.Wireless terminal can through wireless access network (such as, RAN, Radio Access Network) communicate with one or more core net, wireless terminal can be mobile terminal, as mobile phone (or being called " honeycomb " phone) and the computer with mobile terminal, such as, can be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network exchange language and/or data.Such as, Personal Communications Services (PCS, Personal Communication Service) phone, cordless telephone, Session Initiation Protocol phone, wireless local loop (WLL, Wireless Local Loop) stand, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal also can be called system, subscri er unit (Subscriber Unit), subscriber station (Subscriber Station), mobile radio station (Mobile Station), travelling carriage (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), subscriber equipment (User Device) or subscriber's installation (User Equipment).

Base station (such as, access point) can be in Access Network aloft on interface by the equipment of one or more sector and wireless terminal communications.Base station can be used for the air frame received and IP to divide into groups mutually to change, and as the router between wireless terminal and the remainder of Access Network, wherein the remainder of Access Network can comprise Internet protocol (IP) network.Base station also tunable to the attribute management of air interface.Such as, base station can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be evolved base station (NodeB or eNB or e-NodeB in LTE, evolutional Node B), the present invention does not limit.

Base station controller can be the base station controller (BSC, base station controller) in GSM or CDMA, and also can be the radio network controller (RNC, Radio Network Controller) in WCDMA, the present invention limit.

In addition, term " system " and " network " are often used interchangeably in this article herein.Term "and/or" herein, being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.In addition, character "/" herein, general expression forward-backward correlation is to the relation liking a kind of "or".

Embodiment 1

The embodiment of the present invention provides a kind of stream table exchange method, as shown in Figure 1, comprising:

S101, switch, after connecting with controller, receive the stream table capabilities request message of self-controller.

It should be noted that, the embodiment of the present invention can be applied in the packet repeating process of Open Flow network, switch in the embodiment of the present invention is the Open Flow Switch in Open Flow network, and controller is the controller Controller in Open Flow network.

Concrete, switch is after connecting with controller, namely in the handshake phase of controller and Open Flow Switch, controller (Controller) can send stream table capabilities request message (table stats request), to the ability of switch request stream table to switch (Open Flow Switch).

S102, switch send logic flow table to controller, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy.

Concrete, switch logically can flow table and reply table stats reply after receiving stream table capabilities request message (table stats request).Wherein, logic flow table is that essence joins table, and logic flow table can comprise: the stream table ability of the stream table number prestored in switch, each stream table prestored, and matching domain etc.

S103, switch receive at least one first-class list item that controller issues, and generate physical streams table, so that according to physical streams table forwarding data bag after receiving packet according at least one first-class list item.

Wherein, physical streams table comprises: at least one physical streams list item, and physical streams list item comprises: network layer protocol indication information, the first public coupling thresholding, transport layer protocol indication information and the second public coupling thresholding; First public coupling thresholding is the public coupling thresholding of first network layer protocol and second network layer protocol, and the second public coupling thresholding is the public coupling thresholding of the first transport layer protocol, the second transport layer protocol and the 3rd transport layer protocol.

The stream table exchange method that the embodiment of the present invention provides, switch, after connecting with controller, receives the stream table capabilities request message of self-controller; Send logic flow table to controller, logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy; Receive at least one first-class list item that controller issues, and generate physical streams table, so that forward described packet according to physical streams table after receiving packet according at least one first-class list item.With prior art, adopt a wildcard table or six essences to join table realization and support that the wasting of resources that the stream table access of multiple agreement controls to cause or system power dissipation are compared more greatly, an essence comprising public matching domain can be generated according to logic flow list item and join table, i.e. physical streams list item, can the wasting of resources be reduced, reduce system power dissipation simultaneously.

Embodiment 2

The embodiment of the present invention provides a kind of stream table exchange method, as shown in Figure 2, comprising:

After S201, controller are that switch connects, send stream table capabilities request message to switch.

S202, switch send logic flow table to controller, and logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored.

Concrete, logic flow table is that essence joins table, logic flow table can comprise: at least one logic flow list item, and logic flow list item can comprise: the coupling thresholding of the coupling thresholding of the coupling thresholding of network layer protocol indication information (Eth-Type), first network layer protocol, the coupling thresholding of second network layer protocol, transport layer protocol indication information (Ip-Port), the first transport layer protocol, the coupling thresholding of the second transport layer protocol, the 3rd transport layer protocol.

Exemplary, network layer protocol (Internet Protocol) comprising: first network layer protocol, second network layer protocol; Concrete, first network layer protocol is: Internet Protocol 4(Internet Protocol Version4, IPv4), second network layer protocol is: Internet Protocol 6(Internet Protocol Version6, IPv6); Or first network layer protocol is: IPv6, second network layer protocol is: IPv4.

Transport layer protocol can comprise: the first transport layer protocol, the second transport layer protocol, the 3rd transport layer protocol: concrete; first transport layer protocol is transmission control protocol (Transmission Control Protocol; TCP); second transport layer protocol is User Datagram Protoco (UDP) (User Datagram Protocol; UDP); 3rd transport layer protocol is (Scalable TCP, STCP); Or the first transport layer protocol is TCP, the second transport layer protocol is STCP, and the 3rd transport layer protocol is UDP; Or the first transport layer protocol is UDP, the second transport layer protocol is TCP, and the 3rd transport layer protocol is STCP; Or the first transport layer protocol is UDP, the second transport layer protocol is STCP, and the 3rd transport layer protocol is TCP; Or the first transport layer protocol is STCP, the second transport layer protocol is TCP, and the 3rd transport layer protocol is UDP; Or the first transport layer protocol is STCP, the second transport layer protocol is UDP, and the 3rd transport layer protocol is TCP.

In logic flow table, when network layer protocol indication information designation data bag is applicable to first network layer protocol, the coupling thresholding of second network layer protocol is zero; When network layer protocol indication information designation data bag is applicable to second network layer protocol, the coupling thresholding of first network layer protocol is zero.

In logic flow table, when transport layer protocol indication information designation data bag is applicable to the first transport layer protocol, the coupling thresholding of the second transport layer protocol and the 3rd transport layer protocol is zero; When transport layer protocol indication information designation data bag is applicable to the second transport layer protocol, the coupling thresholding of the first transport layer protocol and the 3rd transport layer protocol is zero; When transport layer protocol indication information designation data bag is applicable to the 3rd transport layer protocol, the coupling thresholding of the first transport layer protocol and the second transport layer protocol is zero.

It should be noted that, the particular content of the logic flow table in the embodiment of the present invention, concrete form include but not limited to that the other guide of the content logic stream table exemplified in the embodiment of the present invention and other form embodiment of the present invention repeat no more here.

S203, controller are at least one first-class list item of switch configuration according to logic flow table, and first-class list item is used to indicate packet forwarding strategy.

Wherein, the stream table ability of the stream table number prestored in the switch comprised in the logic flow table that controller can report according to switch and each stream table prestored be switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy.

Exemplary, in first-class list item, when network layer protocol indication information designation data bag is applicable to first network layer protocol, the coupling thresholding of second network layer protocol is arbitrary value; When network layer protocol indication information designation data bag is applicable to described second network layer protocol, the coupling thresholding of first network layer protocol is arbitrary value.

In first-class list item, when transport layer protocol indication information designation data bag is applicable to the first transport layer protocol, the coupling thresholding of the second transport layer protocol and the 3rd transport layer protocol is arbitrary value; When transport layer protocol indication information designation data bag is applicable to the second transport layer protocol, the coupling thresholding of the first transport layer protocol and the 3rd transport layer protocol is arbitrary value; When transport layer protocol indication information designation data bag is applicable to the 3rd transport layer protocol, the coupling thresholding of the first transport layer protocol and the second transport layer protocol is arbitrary value.

S204, switch receive at least one first-class list item of self-controller.

Further alternative, in embodiments of the present invention, in order to ensure the legitimacy of the first-class list item that controller issues, switch can check first-class list item according to logic flow table, and namely the method for the embodiment of the present invention can also comprise S205:

S205, switch are according to the legitimacy of at least one first-class list item of logic flow table look-up.

Concrete, switch can according to the ability of the stream table comprised in logic flow table, or logic flow tableau format etc. detects the legitimacy of first-class list item; Wherein, first-class list item is that essence joins surface low list item.

S206, switch generate physical streams table according to the first-class list item meeting legitimacy.

Wherein, switch can determine the network layer protocol that the packet that this first-class list item is corresponding is suitable for according to the network layer protocol indication information in a first-class list item, then select the coupling thresholding of corresponding network layer protocol (first network layer protocol or second network layer protocol) as the network layer protocol coupling thresholding of this packet; Determine according to the transport layer protocol indication information in this first-class list item the transport layer protocol that packet that this first-class list item is corresponding is suitable for, then select the transport layer protocol coupling thresholding of coupling thresholding as this packet of corresponding transport layer protocol (the first transport layer protocol or the second transport layer protocol or the 3rd transport layer protocol); A physical streams list item is generated according to the transport layer protocol indication information of the network layer protocol indication information of this first-class list item, corresponding network layer protocol, this first-class list item, corresponding transport layer protocol; Physical streams table is generated according at least one the physical streams list item generated.

Concrete, when network layer protocol indication information designation data bag is applicable to first network layer protocol, the in physical streams list item first public coupling thresholding is the coupling thresholding of the first network layer protocol in logic flow table; When network layer protocol indication information designation data bag is applicable to second network layer protocol, the in physical streams list item first public coupling thresholding is the coupling thresholding of the second network layer protocol in logic flow table.

When transport layer protocol indication information designation data bag is applicable to the first transport layer protocol, the in physical streams list item second public coupling thresholding is the coupling thresholding of the first transport layer protocol in logic flow table; When transport layer protocol indication information designation data bag is applicable to the second transport layer protocol, the in physical streams list item second public coupling thresholding is the coupling thresholding of the second transport layer protocol in logic flow table; When transport layer protocol indication information designation data bag is applicable to the 3rd transport layer protocol, the in physical streams list item second public coupling thresholding is the coupling thresholding of the 3rd transport layer protocol in logic flow table.

S207, switch receive packet, and judge whether comprise in physical streams table and data packet matched physical streams list item.

Wherein, switch is after receiving a packet, and the physical streams list item that can match at physics flow stream searching and this packet, namely judges whether comprise in physical streams table and data packet matched physical streams list item.

Concrete, if comprise in physical streams table and data packet matched physical streams list item, then perform S208; If do not comprise in physical streams table and data packet matched physical streams list item, then perform S209-S21;

S208, switch according to data packet matched physical streams list item forwarding data bag.

S209, switch send stream list item request message to controller.

Wherein, the information of relevant this packet of forwarding in stream list item request message, can be comprised, as this packet the network layer protocol, the transport layer protocol that use, the information such as the size of packet.

S210, controller are packet configuration second list item according to stream list item request message, and second list item is and data packet matched stream list item.

Concrete, controller can be the second list item that packet is configured for this packet pass-through mode of instruction according to stream list item request message.

Exemplary, in second list item, when network layer protocol indication information designation data bag is applicable to first network layer protocol, the coupling thresholding of second network layer protocol is arbitrary value; When network layer protocol indication information designation data bag is applicable to described second network layer protocol, the coupling thresholding of first network layer protocol is arbitrary value.

In second list item, when transport layer protocol indication information designation data bag is applicable to the first transport layer protocol, the coupling thresholding of the second transport layer protocol and the 3rd transport layer protocol is arbitrary value; When transport layer protocol indication information designation data bag is applicable to the second transport layer protocol, the coupling thresholding of the first transport layer protocol and the 3rd transport layer protocol is arbitrary value; When transport layer protocol indication information designation data bag is applicable to the 3rd transport layer protocol, the coupling thresholding of the first transport layer protocol and the second transport layer protocol is arbitrary value.

S211, controller send second list item to switch.

S212, switch, according to the legitimacy of logic flow table look-up second list item, generate the physical streams list item corresponding with the second list item meeting legitimacy.

Wherein, switch according to the method for the legitimacy of logic flow table look-up second list item and switch similar according to the method for the legitimacy of the first-class list item of logic flow table look-up, the embodiment of the present invention repeats no more here.

S212, switch are according to the physical streams list item forwarding data bag generated.

Further alternative, the method for the embodiment of the present invention can also comprise S213:

S213, switch are according to the physical streams entry updating physical streams table corresponding with second list item.

Wherein, switch can according to the physical streams entry updating physical streams table corresponding with second list item, so that when switch receives this packet again, and can directly according to this physical streams list item forwarding data bag.

The stream table exchange method that the embodiment of the present invention provides, switch, after connecting with controller, receives the stream table capabilities request message of self-controller; Send logic flow table to controller, logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy; Receive at least one first-class list item that controller issues, and generate physical streams table, so that according to physical streams table forwarding data bag after receiving packet according at least one first-class list item.With prior art, adopt a wildcard table or six essences to join table realization and support that the wasting of resources that the stream table access of multiple agreement controls to cause or system power dissipation are compared more greatly, an essence comprising public matching domain can be generated according to logic flow list item and join table, i.e. physical streams list item, can the wasting of resources be reduced, reduce system power dissipation simultaneously.

Embodiment 3

The embodiment of the present invention provides a kind of switch, as shown in Figure 3, comprising: receiving element 31, transmitting element 32, generation unit 33, retransmission unit 34.

Receiving element 31, for after connecting with controller, receives the stream table capabilities request message of self-controller.

Transmitting element 32, for sending logic flow table to described controller, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores, with make described controller according to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy.

Described receiving element 31, also for receive that described controller issues at least one described in first-class list item.

Generation unit 33, for receive according to described receiving element 31 at least one described in first-class list item generate physical streams table.

Described receiving element 31, also for receiving packet.

Retransmission unit 34, forwards described packet for the described physical streams table generated according to described generation unit 33 after described receiving element 31 receives described packet.

Further, described logic flow table comprises: at least one logic flow list item, and described logic flow list item comprises: the coupling thresholding of the coupling thresholding of described network layer protocol indication information, described first network layer protocol, the coupling thresholding of described second network layer protocol, described transport layer protocol indication information, the coupling thresholding of described first transport layer protocol, described second transport layer protocol, the coupling thresholding of described 3rd transport layer protocol.

Wherein, in described logic flow table, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is zero; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is zero.

Further, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described first network layer protocol in described logic flow table; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described second network layer protocol in described logic flow table.

Further, as shown in Figure 4, described switch, can also comprise: inspection unit 35.

Inspection unit 35, before generating physical streams table at described generation unit 33 according to first-class list item described at least one, according to the legitimacy of described logic flow table look-up first-class list item described at least one.

Described generation unit 33, the described first-class list item meeting described legitimacy also for obtaining according to described inspection unit inspection generates described physical streams table.

Further, as shown in Figure 5, described retransmission unit 34, comprising: matching module 341, sending module 342, receiver module 343, generation module 344, forwarding module 345.

Matching module 341, for after described receiving element 31 receives described packet, searches and described data packet matched described physical streams list item in the described physical streams table that described generation unit 33 generates.

Sending module 342, if determine not comprise in described physical streams table and described data packet matched described physical streams list item for described matching module 341, then send stream list item request message to described controller, to make described controller be described packet configuration second list item according to described stream list item request message, described second list item is and described data packet matched stream list item.

Receiver module 343, for receiving the described second list item from described controller, and according to described logic flow table look-up the legitimacy of second list item.

Generation module 344, for the physical streams list item that the described second list item generated with meet described legitimacy is corresponding.

Forwarding module 345, forwards described packet for the described physical streams list item generated according to described generation module 344.

Further, as shown in Figure 6, described switch, can also comprise: updating block 36.

Updating block 36, for physical streams table described in physical streams entry updating corresponding with described second list item according to described retransmission unit 34 generation.

Further, described forwarding module 345, if also determine to comprise in described physical streams table and described data packet matched described physical streams list item for described matching module 341, then forward described packet according to described and described data packet matched described physical streams list item.

Further, in described first-class list item or described second list item, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is arbitrary value; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is arbitrary value.

It should be noted that, in the switch that the embodiment of the present invention provides, the specific descriptions of part functional module can corresponding content in reference method embodiment, and the present embodiment is no longer described in detail here.

The switch that the embodiment of the present invention provides, after connecting with controller, receives the stream table capabilities request message of self-controller; Send logic flow table to controller, logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy; Receive at least one first-class list item that controller issues, and generate physical streams table, so that forward described packet according to physical streams table after receiving packet according at least one first-class list item.With prior art, adopt a wildcard table or six essences to join table realization and support that the wasting of resources that the stream table access of multiple agreement controls to cause or system power dissipation are compared more greatly, an essence comprising public matching domain can be generated according to logic flow list item and join table, i.e. physical streams list item, can the wasting of resources be reduced, reduce system power dissipation simultaneously.

Embodiment 4

The embodiment of the present invention provides a kind of switch, as shown in Figure 7, comprising: receiver 41, transmitter 42, processor 43.

Receiver 41, for after connecting with controller, receives the stream table capabilities request message from described controller.

Transmitter 42, for sending logic flow table to described controller, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores, with make described controller according to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy.

Described receiver 41, also for receive that described controller issues at least one described in first-class list item.

Processor 43, for receive according to described receiver 41 at least one described in first-class list item generate physical streams table.

Described receiver 41, also for receiving packet.

Processor 43, for forwarding described packet according to described physical streams table after described receiver 41 receives described packet.

Further, processor 43, also for before generating physical streams table according to first-class list item described at least one, according to the legitimacy of described logic flow table look-up first-class list item described at least one; Described physical streams table is generated according to the described described first-class list item meeting described legitimacy.

Further, described processor 43, also for after described receiver 41 receives described packet, searches and described data packet matched described physical streams list item in described physical streams table.

Described transmitter 42, if also for not comprising in described physical streams table and described data packet matched described physical streams list item, then send stream list item request message to described controller, to make described controller be described packet configuration second list item according to described stream list item request message, described second list item is and described data packet matched stream list item.

Described receiver 41, also for receiving the described second list item from described controller.

Described processor 43, also for the legitimacy of second list item according to described logic flow table look-up; Generate the physical streams list item corresponding with the described second list item meeting described legitimacy.

Transmitter 42, also for forwarding described packet according to the described physical streams list item generated.

Further, described processor 43, also for physical streams table according to the physical streams entry updating corresponding with described second list item.

Further, described transmitter 42, if also determine to comprise in described physical streams table and described data packet matched described physical streams list item for described processor 43, then forwards described packet according to described and described data packet matched described physical streams list item.

Embodiment 5

The embodiment of the present invention provides a kind of stream table interactive system, as shown in Figure 8, comprising: switch 51, controller 52.

Switch 51, for after connecting with controller 52, receives the stream table capabilities request message from described controller 52; Send logic flow table to described controller 52, described logic flow table comprises: the stream table number prestored in described switch 51 and each described in the stream table ability of stream table that prestores, be the first-class list item that described switch 51 configures that at least one is used to indicate packet forwarding strategy to make described controller 52 according to described logic flow table; Receive that described controller 52 issues at least one described in first-class list item, and generate physical streams table, so that forward described packet according to described physical streams table after receiving packet according to list item first-class described at least one;

Controller 52, after being that described switch 51 connects, sends stream table capabilities request message to described switch 51; Receive from the logic flow table of described switch 51, described logic flow table comprises: the stream table number prestored in described switch 51 and each described in the stream table ability of stream table that prestores; Be the first-class list item that described switch 51 configures that at least one is used to indicate packet forwarding strategy according to described logic flow table; Send first-class list item described at least one to described switch 51, to make described switch 51 generate physical streams table according to list item first-class described at least one, and then described switch 51 is made to forward described packet according to described physical streams table after receiving packet.

Further, described controller 52 also for receiving the described stream list item request message from described switch 51, and is described packet configuration second list item according to described stream list item request message;

Wherein, described stream list item request message is that described switch 51 does not comprise and sends with during described data packet matched described physical streams list item in described physical streams table.

It should be noted that, in the stream table interactive system that the embodiment of the present invention provides, the specific descriptions of switch and controller can with reference to the corresponding content in other embodiments, and the present embodiment is no longer described in detail here.

The stream table interactive system that the embodiment of the present invention provides, switch, after connecting with controller, receives the stream table capabilities request message of self-controller; Send logic flow table to controller, logic flow table comprises: the stream table ability of the stream table number prestored in switch and each stream table prestored, and to make controller, according to logic flow table, for switch configuration, at least one is used to indicate the first-class list item of packet forwarding strategy; Receive at least one first-class list item that controller issues, and generate physical streams table, so that forward described packet according to physical streams table after receiving packet according at least one first-class list item.With prior art, adopt a wildcard table or six essences to join table realization and support that the wasting of resources that the stream table access of multiple agreement controls to cause or system power dissipation are compared more greatly, an essence comprising public matching domain can be generated according to logic flow list item and join table, i.e. physical streams list item, can the wasting of resources be reduced, reduce system power dissipation simultaneously.

Through the above description of the embodiments, those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, the internal structure by device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.

In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described module or unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims

1. a stream table exchange method, is characterized in that, comprising:

2. stream table exchange method according to claim 1, is characterized in that,

Described logic flow table comprises: at least one logic flow list item, and described logic flow list item comprises: the coupling thresholding of the coupling thresholding of described network layer protocol indication information, described first network layer protocol, the coupling thresholding of described second network layer protocol, described transport layer protocol indication information, the coupling thresholding of described first transport layer protocol, described second transport layer protocol, the coupling thresholding of described 3rd transport layer protocol;

3. stream table exchange method according to claim 1, is characterized in that,

When described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described first network layer protocol in described logic flow table; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the described first public coupling thresholding in described physical streams list item is the coupling thresholding of the described second network layer protocol in described logic flow table;

4. the stream table exchange method according to any one of claim 1-3, is characterized in that, described generate physical streams table according to first-class list item described at least one before, described method also comprises:

5. stream according to claim 1 table exchange method, is characterized in that, describedly after receiving packet, forwards described packet according to described physical streams table, comprising:

6. stream table exchange method according to claim 5, is characterized in that, also comprise:

7. stream table exchange method according to claim 5, is characterized in that, also comprise:

8. stream shows exchange method according to claim 1 or 5, it is characterized in that,

In described first-class list item or described second list item, when described network layer protocol indication information indicates described packet to be applicable to described first network layer protocol, the coupling thresholding of described second network layer protocol is arbitrary value; When described network layer protocol indication information indicates described packet to be applicable to described second network layer protocol, the coupling thresholding of described first network layer protocol is arbitrary value;

9. a switch, is characterized in that, comprising:

Described receiving element, also for receiving packet;

10. switch according to claim 9, is characterized in that,

11. switches according to claim 9, is characterized in that,

12. switches according to any one of claim 9-11, is characterized in that, also comprise:

13. switches according to claim 9, is characterized in that, described retransmission unit, comprising:

14. switches according to claim 13, is characterized in that, also comprise:

15. switches according to claim 13, is characterized in that,

Described forwarding module, if also determine to comprise in described physical streams table and described data packet matched described physical streams list item for described matching module, then forwards described packet according to described and described data packet matched described physical streams list item.

16. switches according to claim 9 or 13, is characterized in that,

17. 1 kinds of stream table interactive systems, is characterized in that, comprising:

Switch according to any one of claim 9-16; Controller;

Described controller, after being that described switch connects, sends stream table capabilities request message to described switch; Receive from the logic flow table of described switch, described logic flow table comprises: the stream table number prestored in described switch and each described in the stream table ability of stream table that prestores; According to described logic flow table be described switch configuration at least one be used to indicate the first-class list item of packet forwarding strategy; Send first-class list item described at least one to described switch, to make described switch generate physical streams table according to list item first-class described at least one, and then make described switch forward described packet according to described physical streams table after receiving packet.

18. stream table interactive systems according to claim 17, is characterized in that, described controller, also for receiving the described stream list item request message from described switch, and are described packet configuration second list item according to described stream list item request message;