CN101789904A - Method and equipment for controlling flow - Google Patents
Method and equipment for controlling flow Download PDFInfo
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Abstract
The invention discloses a method and equipment for controlling flow. The method comprises the following steps that: the equipment receives flow and identifies the application type of the flow, and searches pre-configured routing control strategy according to the application type of the flow; if the routing control strategy corresponding to the application type of the flow is configured in the equipment configuration, the equipment transmits the flow according to the routing control strategy; and if the routing control strategy corresponding to the application type of the flow is not configured in the equipment configuration, the equipment searches a saved local routing table to transmit the flow. In the method, the flow control strategy based on the application type is configured in the routing equipment, and the routing equipment acquires the application type of the received the application type of the flow and forwards the flow according to the configured flow control strategy, so that load balance can be realized and key service can be ensured.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and apparatus of flow control.
Background technology
Along with popularizing that the industry wide area network is built and used, loaded service amount and class of business are also in continuous increase on the wide area network, ERP (Enterprise Resource Planning for example, enterprise resource planning), video conference, VOIP (Voice Over Internet Protocol, the networking telephone), electronic mail service etc.Because the wide area network link bandwidth is limited and transmit distance, need realize that the transmission on wide area network is controlled to these service traffics by a kind of simple and direct effective traffic engineering means, reasonably the planning network resource guarantees key business, improves utilization rate of network resource and avoids congested.
For example, in networking shown in Figure 1, R1, R2, R3 are original wide area network interconnect equipments, and link bandwidth is 2M.Network has increased R4, R5, R6 equipment newly after realizing dilatation, and newly-increased wide-area link bandwidth is 8M, has formed the wide area networking of typical asymmetric link.A lot of users are in order to ensure crucial video traffic, and the general data business is walked the 2M link to the planning video traffic on wide area walking the 8M link on the wide area network.
Purpose in order to realize the flow of different service types is sent by different links in the prior art, direct collocation strategy route on each hop router of wide area network, source/purpose IP (Internet Protocol according to service traffics, Internet Protocol) type of service of service traffics is told in the information area such as address, according to configured strategy video traffic is forwarded to corresponding link by different ports respectively with the general data Business Stream again and gets on, to realize basic flow control and load balancing based on business.
But, this collocation method need manually carry out the routing policy configuration on each WAN router, workload is big, the configuration difficulty, and distribute and change conditions because the attendant possibly can't be known the services addresses of internal network, thereby can't be configured maintenance.
Summary of the invention
The invention provides a kind of method and apparatus of flow control, to realize that according to application type planning and configuration service flow path, the realization load balancing also ensures key business.
The invention provides a kind of method of flow control, be applied to equipment according to the application type converting flow, the route control strategy of the pre-configured application type based on flow of described equipment, this method further comprises:
Described equipment receives flow and the application type of described flow is discerned, and searches pre-configured route control strategy according to the application type of described flow;
If described equipment disposition has the route control strategy corresponding with the application type of described flow, described equipment sends described flow according to described route control strategy;
If described equipment does not have the configuration route control strategy corresponding with the application type of described flow, the local routing table that described equipment is searched storage sends described flow.
The application type of the described flow of described recognition of devices comprises:
When described equipment receives flow from the incoming interface that disposes described route control strategy, discern the application type of described flow according to the application port number of the condition code of described flow or described flow.
Described route control strategy is specially the corresponding relation of application type, incoming interface and the outgoing interface of flow.
Before the application type of the flow that described recognition of devices receives, also comprise:
Described equipment obtains the five-tuple or seven tuple information of the flow that receives, according to the flow label strategy of described five-tuple information searching storage;
If store the flow label strategy corresponding with described five-tuple or seven tuple information, described equipment carries out the flow forwarding according to the flow label strategy of correspondence;
If there be not the storage flow label strategy corresponding with described five-tuple or seven tuple information, described equipment is carried out the step of the application type of the described flow of identification.
Described equipment sends described flow or described equipment according to described route control strategy and searches the routing forwarding list item of storage and send after the described flow, also comprises:
Described equipment generates and the corresponding flow label strategy of flow that sends, and writes down this forwarding of flow strategy.
The invention provides a kind of equipment that is applied to the described method of aforesaid right requirement, this equipment comprises acquiring unit, dispensing unit, recognition unit and retransmission unit, wherein
Described acquiring unit is used to obtain the flow that described equipment receives;
Described dispensing unit is used to dispose the route control strategy based on the application type of flow;
Described recognition unit is connected with dispensing unit with described acquiring unit, is used to discern the application type of the flow that described equipment receives, and searches the route control strategy of described dispensing unit configuration according to the application type of described flow;
Described retransmission unit is connected with described recognition unit, be used for when described recognition unit find application type with flow corresponding based on the route control strategy of flow application type the time, send described flow according to described route control strategy; When described recognition unit does not find the corresponding route control strategy of application type with flow, send described flow according to the local routing table of described device storage.
Described recognition unit is judged the application type of described flow according to the application port number of the condition code of described flow or described flow.
This equipment also comprises:
Record cell is connected with described retransmission unit, be used for described retransmission unit transmitted traffic after, generate and the corresponding flow label strategy of flow forwarding;
Search the unit, be connected, be used to obtain the five-tuple or seven tuple information of the flow that described equipment receives, search the flow label strategy of described recording unit records according to described five-tuple or seven tuple information with described recognition unit, record cell and retransmission unit; If find the flow label strategy corresponding, then send described flow by described retransmission unit according to described flow label strategy with described flow; If do not find the flow label strategy corresponding, then send described flow to described recognition unit with described flow.
This equipment also comprises:
Memory cell is connected with described retransmission unit, is used to store the local routing table of described equipment, and according to the local routing table of described retransmission unit to the forwarding information updated stored of flow.
Compared with prior art, the present invention has the following advantages at least:
Among the present invention, equipment disposition is based on the flow control strategy of application type, obtain the application type of the flow that receives, and the flow control strategy of further searching configuration carries out the flow forwarding, realization is planned and the configuration service flow path according to the application type of flow, thereby can be realized load balancing and ensure key business.
Description of drawings
Fig. 1 is a wide area network networking structure schematic diagram in the prior art;
Fig. 2 is the schematic flow sheet of the method for flow control provided by the invention;
Fig. 3 is the schematic flow sheet of the method for the flow control that provides of application scenarios of the present invention;
Fig. 4 is the structural representation of the equipment of flow control provided by the invention.
Embodiment
Core concept of the present invention is: configuration is based on the flow control strategy of application type in equipment, and equipment is discerned the application type of flow automatically, and carries out the flow forwarding according to the application type of flow and the flow control strategy of configuration.
The invention provides a kind of method of flow control, be applied to the equipment transmitted according to the application type of flow, the pre-configured route control strategy of transmitting based on the application type of flow of described equipment, as shown in Figure 2, this method comprises:
Introduce the method for flow control provided by the invention in detail below in conjunction with concrete application scenarios.Flow transmitting apparatus wherein is an example with the wide area network routing device, and as shown in Figure 3, this method may further comprise the steps:
In application scenarios of the present invention, the user is to plan the forwarding of flow path according to the classification of the application type of flow in planning service traffics control strategy, rather than waits according to IP address, protocol type and to classify.Particularly,, be difficult to realize that carrying out flow according to IP address, protocol type etc. transmits classification owing to can't accurately obtain the assignment information of the IP address of Intranet (each local area network (LAN) that for example is connected) service traffics with wide area network for the wide area backbone keeper.
In order correctly to discern the application type of flow, at first need on router, increase among the present invention and use the recognition function module, finish local application type identification of transmitting service traffics fast by this application recognition function module, distinguish common application layer business such as ERP, video conference, VOIP, and 2～7 layer analysis information of these business can be provided.Concrete, router can be discerned the application type of flow by the condition code of obtaining flow, perhaps router is judged the type of service of flow according to the application port number of flow, as HTTP (Hiper Text Transfer Protocol, HTML (Hypertext Markup Language)) port numbers of service traffics is 80, and the port numbers of QQ (instant communication software) is 1080 etc.
Further, the user also needs to dispose the route control strategy based on the flow application type in routing device, according to the importance and the network characterization planning network forwarding of flow path of the application type of flow, this route control strategy is specially the corresponding relation of application type, incoming interface and the outgoing interface of flow.Be example with group-network construction shown in Figure 1 still, suppose in the router main crucial video conference business flow and the common ERP service traffics of existing, the user plans that the video traffic flow walks the 8M link on wide area network, and the ERP data are walked the 2M link.Application type according to business on the router disposes the flow forward-path, as configuration route control strategy on RR2, for example set up the Eth0/1/1 port, the corresponding relation of video traffic flow and S0/0/2 port, set up the Eth0/1/1 port, the corresponding relation of ERP data and S0/0/1 port, transmit by the S0/0/2 port that connects the 8M link from the video traffic flow that the Eth0/1/1 port comes, then transmit from the ERP data that the Eth0/1/1 port comes by the S0/0/1 port that connects the 2M link, other node router that need carry out service distributing control also carries out similar configuration, need not to pay close attention to professional in the address information of Intranet and the problems such as agreement of use.
The route control strategy based on the application type of flow that disposes in the routing device is as shown in table 1:
Table 1
.........................................
Router-id：RR2
Application?Control In Out
1.Video Eth0/1/1 S0/0/2
2.ERP Eth0/1/1 S0/0/1
3.BT.
4.......
.........................................
For convenience of description, be the flow of Video (video) and ERP only in the table 1 to using type, disposed corresponding route control strategy, do not dispose the flow of the application type of route control strategy for all the other, as flow of BT (BitTorrent, bit stream) type etc., then can be as required, the same configuration route control strategy corresponding with application type perhaps under the situation of default configuration route control strategy, searched routing table according to normal routing forwarding flow process and transmitted.
Concrete, after routing device is transmitted certain flow, can write down this forwarding of flow strategy, it is the flow label strategy, comprising the five-tuple information that is used to distinguish this flow (source IP address, purpose IP address, protocol number, source port, destination interface), can certainly be other label informations, seven tuple information for example.For the identical follow-up flow of five-tuple information, routing device directly carries out flow according to the flow label strategy and transmits.If routing device does not have the storage flow label strategy corresponding with the flow that receives, then routing device needs further the application type of flow to be discerned, and transmits according to the application type corresponding flow route control strategy of this flow.Configuration can be at particular port based on the route control strategy of flow application type in the routing device, and at this moment, routing device can carry out flow according to the route control strategy and transmit for the flow that receives from this particular port.
Particularly, routing device can be discerned the type of service of flow according to the application port number of the condition code of flow or flow, as HTTP (Hiper Text Transfer Protocol, HTML (Hypertext Markup Language)) port numbers of service traffics is 80, and the port numbers of QQ (instant communication software) is 1080 etc.Then, the route control strategy shown in the routing device look-up table 1, if disposed the route control strategy of the application type correspondence of this flow in the routing device, then the match is successful; Otherwise it fails to match.
For example, if it is Video stream that routing device obtains this flow, then routing device is according to the route control strategy based on the flow application type shown in the table 1, generating port is the flow forwarding strategy of S0/0/2, flow is transmitted by the S0/0/2 port, and this is flow to row labels with five-tuple information, generate corresponding flow label strategy.The follow-up stream that meets flag condition need not to carry out discriminance analysis again, directly transmits according to the flow label strategy.
For example, if it is the route control strategy based on the flow application type that BT flows and do not dispose for this BT flow in advance correspondence that routing device obtains this flow, then such BT flow is carried out normal routing forwarding, promptly searching local routing table transmits, and this flow carried out the five-tuple mark, generate the flow label strategy, the BT stream of follow-up coupling five-tuple information does not need to carry out the application type analysis, directly transmits according to the flow label strategy.
By adopting method provided by the invention, configuration is based on the flow control strategy of application type in equipment, obtain the application type of the flow that receives, and the flow control strategy of further searching configuration carries out the flow forwarding, realization is planned and the configuration service flow path according to the application type of flow, thereby can be realized load balancing and ensure key business.
The invention provides a kind of equipment that is applied to above-mentioned flow control methods, as shown in Figure 4, comprise acquiring unit 11, search unit 12, record cell 13, retransmission unit 14, recognition unit 15, dispensing unit 16 and memory cell 17, wherein,
Acquiring unit 11 and is searched unit 12 and is connected, and is used to obtain the flow that described equipment receives;
Dispensing unit 16 is connected with recognition unit 15, is used to dispose the route control strategy based on the application type of flow;
By adopting equipment provided by the invention, configuration is based on the flow control strategy of application type in routing device, routing device obtains the application type of the flow that receives, flow control strategy according to configuration carries out the flow forwarding, realization realizes load balancing and ensures key business according to the application type planning and the configuration service flow path of flow.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1. the method for a flow control is applied to the equipment according to the application type converting flow, it is characterized in that, and the route control strategy of the pre-configured application type based on flow of described equipment, this method further comprises:
Described equipment receives flow and the application type of described flow is discerned, and searches pre-configured route control strategy according to the application type of described flow;
If described equipment disposition has the route control strategy corresponding with the application type of described flow, described equipment sends described flow according to described route control strategy;
If described equipment does not have the configuration route control strategy corresponding with the application type of described flow, the local routing table that described equipment is searched storage sends described flow.
2. the method for claim 1 is characterized in that, the application type of the described flow of described recognition of devices comprises:
When described equipment receives flow from the incoming interface that disposes described route control strategy, discern the application type of described flow according to the application port number of the condition code of described flow or described flow.
3. the method for claim 1 is characterized in that, described route control strategy is specially the corresponding relation of application type, incoming interface and the outgoing interface of flow.
4. as each described method among the claim 1-3, it is characterized in that, before the application type of the flow that described recognition of devices receives, also comprise:
Described equipment obtains the five-tuple or seven tuple information of the flow that receives, according to the flow label strategy of described five-tuple information searching storage;
If store the flow label strategy corresponding with described five-tuple or seven tuple information, described equipment carries out the flow forwarding according to the flow label strategy of correspondence;
If there be not the storage flow label strategy corresponding with described five-tuple or seven tuple information, described equipment is carried out the step of the application type of the described flow of identification.
5. method as claimed in claim 4 is characterized in that, described equipment sends described flow or described equipment according to described route control strategy and searches the routing forwarding list item of storage and send after the described flow, also comprises:
Described equipment generates and the corresponding flow label strategy of flow that sends, and writes down this forwarding of flow strategy.
6. an equipment that is applied to the described method of claim 1 is characterized in that, this equipment comprises acquiring unit, dispensing unit, recognition unit and retransmission unit, wherein
Described acquiring unit is used to obtain the flow that described equipment receives;
Described dispensing unit is used to dispose the route control strategy based on the application type of flow;
Described recognition unit is connected with dispensing unit with described acquiring unit, is used to discern the application type of the flow that described equipment receives, and searches the route control strategy of described dispensing unit configuration according to the application type of described flow;
Described retransmission unit is connected with described recognition unit, be used for when described recognition unit find application type with flow corresponding based on the route control strategy of flow application type the time, send described flow according to described route control strategy; When described recognition unit does not find the corresponding route control strategy of application type with flow, send described flow according to the local routing table of described device storage.
7. equipment as claimed in claim 6 is characterized in that, described recognition unit is judged the application type of described flow according to the application port number of the condition code of described flow or described flow.
8. as claim 6 or 7 described equipment, it is characterized in that this equipment also comprises:
Record cell is connected with described retransmission unit, be used for described retransmission unit transmitted traffic after, generate and the corresponding flow label strategy of flow forwarding;
Search the unit, be connected, be used to obtain the five-tuple or seven tuple information of the flow that described equipment receives, search the flow label strategy of described recording unit records according to described five-tuple or seven tuple information with described recognition unit, record cell and retransmission unit; If find the flow label strategy corresponding, then send described flow by described retransmission unit according to described flow label strategy with described flow; If do not find the flow label strategy corresponding, then send described flow to described recognition unit with described flow.
9. equipment as claimed in claim 8 is characterized in that, this equipment also comprises:
Memory cell is connected with described retransmission unit, is used to store the local routing table of described equipment, and according to the local routing table of described retransmission unit to the forwarding information updated stored of flow.
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