CN202856787U

CN202856787U - Low-latency convergence TAP

Info

Publication number: CN202856787U
Application number: CN 201220206114
Authority: CN
Inventors: 沈文博; 许迎春; 苗澎
Original assignee: Nanjing Infeono Network Science & Technology Co Ltd
Current assignee: Nanjing Infeono Network Science & Technology Co Ltd
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2013-04-03
Anticipated expiration: 2022-05-10

Abstract

The utility model provides an upstream port data flow scheduling and transmission method convergence of TAP equipment. The TAP equipment comprises at least an upstream port and more than two downstream ports. As data of a plurality of downstream ports needs to be sent out from a small number of the upstream ports, there might exists resource competition. By the adoption of the TAP equipment and its port scheduling method, according to a busy or idle state of the downstream ports in a dynamic manner, data of the downstream ports can be directly sent through a fast path to the upstream ports or competitive data of the plurality of downstream ports can be directly sent to an exchange component for scheduling. According to the utility model, data path delay on some application scenarios can be greatly reduced.

Description

TAP is converged in low delay

Technical field

The utility model relates to TAP (Test Access Point, test access point equipment) technical field, more specifically, relates to a kind of low delay dispatching method that possesses TAP equipment and the upstream thereof of aggregate capabilities.

Background technology

In recent years, along with Internet of Things, cloud computing and mobile network's develop rapidly, based on network application and agreement development, the bandwidth of trunk and edge network is more and more higher, and the demand of network data being carried out distributed treatment is also more urgent.In large-scale firewall/gateway, the monitor node that network data need to be distributed in real time a plurality of downstreams is analyzed and is added up load, and the result after will analyzing adds up and reports.In data center, for the consideration of load balancing, also need to calculate same network flow data is distributed to different computing nodes, the later result of computing also needs to be reported to upstream node.Regenerative TAP is distributed to a plurality of downstream nodes for a circuit-switched data is copied, and convergent type TAP then is used for converging in real time the network equipment that the express network data flow to single (perhaps a small amount of) uplink port.The utility model is mainly paid close attention to convergent type TAP.

Except the physical media (optical fiber or copper cable) of being concerned about that TAP equipment can be supported, the data link bandwidth, the port number of supporting etc., increasing delay of using emphasis whole data loopback (comprising descending distribution and up converging) under the TAP applied environment, particularly in the financial field, postpone to become vital factor.

At present the data path of the TAP equipment of main flow postpones all in the millisecond magnitude on the market, can't satisfy the application such as finance data are postponed day by day harsh requirement.

Summary of the invention

In view of the above problems, the purpose of this utility model provides and a kind ofly converges TAP(Test Access Point for network monitoring system) equipment, comprise the slow data path that converges fast path and consisted of by switching equipment, the wherein said path that converges fast comprises a plurality of downstreams input port, a plurality of input data bufferings, a plurality of strings and conversion equipment, the data stream scheduling device, a plurality of uplink ports and a plurality of switching equipment port, the described TAP of converging equipment is used for a plurality of downstream data port datas are converged to uplink port, when the described path that converges fast when running into data collision, data dispatch is carried out buffer memory and arbitration toward described switching equipment.

The described TAP equipment that converges, wherein, described downstream input port and uplink port can access copper cable or optical fiber, can move any standard or privately owned Data Transport Protocol thereon.

The described TAP equipment that converges, wherein, the described path that converges fast can be that copper cable or optical fiber are connected with physical connection between the switching equipment, can move any standard or privately owned Data Transport Protocol thereon.

The described TAP equipment that converges, wherein, the described a plurality of input data bufferings that converge fast path possess certain buffer capacity, and the header information of energy buffered data streams is with the destination address of resolution data stream.

The described TAP equipment that converges, wherein, the described data stream scheduling device that converges fast path receives all the input data from the downstream data flow port, and they directly is sent to uplink port or with their all or part of replacement part port that is sent to.

The described TAP equipment that converges, wherein, the header information that the described data stream scheduling device that converges fast path is resolved downstream data stream to be judging their destination interface, and dispatches according to following rule:

Resolved and these data are when mailing to uplink port when the data head, and if only if only have a downstream data port that data are arranged, directly this data flow sent to uplink port,

In resolving or transmission course in certain data flow, remaining a plurality of downstream data flow port has data flow to arrive, and the bumped traffic of rear arrival is sent to routed port.

Description of drawings

By the content of reference below in conjunction with the description of the drawings and claims, and along with understanding more comprehensively of the present utility model, other purpose of the present utility model and result will understand and easy to understand more.In the accompanying drawings:

Fig. 1 is the TAP device interior block diagram of the utility model embodiment;

Fig. 2 is the schematic diagram of the related parts of collision detection of the utility model embodiment;

Fig. 3 be the utility model embodiment without data flow diagram under the conflict situations;

Fig. 4 is the data flow diagram under the conflict situations of the utility model embodiment;

Fig. 5 is the system block diagram of using this TAP equipment;

Identical label is indicated similar or corresponding feature or function in institute's drawings attached.

Embodiment

Below with reference to accompanying drawing specific embodiment of the utility model is described in detail.

Describe with reference to figure 1.Fig. 1 is hardware system composition frame chart of the present utility model.Low delay described in the utility model is converged TAP equipment by input interface 11, input data buffering 12, string and conversion equipment 13, data stream scheduling device 15, fast path 14, uplink port 15, slow-path 16, the compositions such as uplink port 17 and switching equipment 20.

Supervisory control system or the computing system of the convergent type TAP equipment that provides in the utility model and this equipment of application, the downstream can connect the computing equipments such as a plurality of intrusion detection devices, High-Performance Financial server.In the fields such as high frequency transaction such as financial sector, the data transmission modes of a plurality of downstream data ports is burst type (burst mode), these data stream port all are in idle condition in the time of most of, therefore thereby to ask simultaneously to send the chance that data lead to a conflict very little for a plurality of downstream ports, but still existing certain probability that a plurality of ports may occur need to send data to the up possibility that converges port in the same moment.

Because the TAP equipment that provides in the utility model provides the fast path that directly sends to uplink port and the slow-path that sends to replacement part simultaneously, therefore, for clearer the technical solution of the utility model is described, the below describes the technical solution of the utility model with the angle of concrete convergent type TAP device data stream.Fig. 2 is the data flow block diagram without TAP inside under the conflict situations, and Fig. 3 has represented to have inner data flow and the control stream of being correlated with the utility model of TAP under the conflict situations.

Fig. 1 has shown data flow relevant with the utility model in the TAP equipment and control flow graph simultaneously.The outside port of TAP equipment represents that with solid line the data flow of TAP device interior dots.The system module figure that TAP shown in Figure 2 is inner relevant with the utility model has shown that just the Module Division in the real system needn't be for shown in this figure in order to realize the needed function of the utility model.

The multi-channel network data flow in downstream is converted to parallel data by the physical interface 11 of optical fiber or copper cable through after the processing of deserializer 12, enters into input data buffering 12.The input data buffering mainly is in order there to be in the situation of conflict buffering input data wait for scheduling, and alternatively, without under the conflict situations, data can the bypass input bufferings and directly are sent to uplink port 17 by data stream scheduling device 15.Whether each downstream input port 11 of data stream scheduling device Real-Time Monitoring has data sending request, when only having a downstream port that request of data is arranged, this data will be directly be deferred to uplink port 17 by the fast path 14 of data stream scheduling device 15 inside with minimum, when the simultaneously request msg transmission of two or more downstream data input ports is arranged, perhaps in certain downstream data input port request msg transmission, last data transfer not yet finish thereby uplink port occupied, to select so the data of an input port to be connected to fast path 14, all the other request of data that lead to a conflict will be sent to switching equipment 20 by slow-path 16, solve collision problem by switching equipment.Switching equipment can be external autonomous device or the function of exchange that realized by ASIC in TAP inside.

Fig. 2 has provided the collision detection principle of data stream scheduling device.The data stream scheduling device needs the data input buffer of Real-Time Monitoring uplink port and each downstream port, if more than a data input buffer request of data is arranged, perhaps only has a data request, but up going port is also in taking, all can be regarded as conflict situations, need to be dispatched by above-mentioned conflict solution.

Fig. 3 has provided of the present utility model without bumped traffic scheduling embodiment.In this example, a port one 6 that has 1, one uplink port 17 of 4 downstream data stream port ones and 4 connection route equipment.Without under the conflict situations, only have downstream data flow port 2 that request of data is arranged in this example, owing to there is not conflict, scheduler can directly send to uplink port 17 with this data flow by fast path 14.

Fig. 4 has provided the bumped traffic scheduling embodiment that has of the present utility model.In this example, 4 downstream data stream port ones of TAP, 2,3 have the request of data that mails to uplink port simultaneously, scheduler detects conflict, cross fast path according to the data communication device of certain rules selection outbound port 2 and directly send to uplink port, the data of other 2 downstream data flow ports then mail to routing device by port one 6 and cushion and dispatch.

Because the situation of conflict is fewer, so overall, most data can both directly mail to uplink port by fast path, have improved delay and the throughput of data flow.

The utility model is to route equipment and have no special requirements, and for the agreement of moving on the TAP facility data link, the common routing device corresponding with this agreement gets final product.But, must be noted that after routing device on the ordinary meaning will cushion complete packet and just carry out Data Analysis, and routing table search also more consuming timely, to arrive the delay meeting of final destination obviously elongated so mail to the data flow of routing device.

In conflict free situation, only have a downstream data flow port that data sending request is arranged, scheduler has been resolved after the head, directly this data flow is sent to uplink port, and the system delay of this moment only has the buffer delay of extremely low data flow head.The data path that directly sends to uplink port from the downstream data flow port is called fast path.

Alternatively, the convergent type TAP equipment in the utility model can be realized P2P communication, namely can realize intercoming mutually between the route data flow port of a plurality of downstream, and the contention resolution of P2P communication does not belong to scope of the present utility model.

Describe system constituting method of the present utility model in detail with reference to figure 6

In the system that uses convergent type TAP described in the utility model, should comprise downstream computing equipment 101, convergent type TAP102, upstream server 103.To be realized or built-in switching asic realizes that system possesses external router one 04 alternatively by external switch according to function of exchange.

As above describe according to TAP equipment of the present utility model and data stream scheduling method in the mode of example with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the TAP data stream scheduling method and the parts that propose for above-mentioned the utility model, can also make various improvement on the basis that does not break away from the utility model content.Therefore, protection range of the present utility model should be determined by the content of appending claims.

The beneficial effects of the utility model: whether exist conflict to decide the different transmission path of input data by system, then walk fast path without conflict, have conflict then to solve conflict and walk slow-path by routing device.The application scenarios that can frequently not occur data transfer request for a plurality of downstream data input ports, the utility model can reduce most of data transfer to postpone, simultaneously because can also bypass input in conflict free situation buffering and routing device, power consumption when also having reduced the operation of TAP equipment.

Claims

1. TAP equipment that converges that is used for network monitoring system, comprise the slow data path that converges fast path and consisted of by switching equipment, the wherein said path that converges fast comprises a plurality of downstreams input port, a plurality of input data bufferings, a plurality of strings and conversion equipment, the data stream scheduling device, a plurality of uplink ports and a plurality of switching equipment port, the described TAP of converging equipment is used for a plurality of downstream data port datas are converged to uplink port, it is characterized in that, when the described path that converges fast when running into data collision, data dispatch is carried out buffer memory and arbitration toward described switching equipment.

2. the TAP equipment that converges as claimed in claim 1 is characterized in that described downstream input port and uplink port can access copper cable or optical fiber, can move any standard or privately owned Data Transport Protocol thereon.

3. the TAP equipment that converges as claimed in claim 1 is characterized in that,

The described path that converges fast can be that copper cable or optical fiber are connected with physical connection between the switching equipment, can move any standard or privately owned Data Transport Protocol thereon.

4, the TAP equipment that converges as claimed in claim 1 is characterized in that,

The described data stream scheduling device that converges fast path receives all the input data from the downstream data flow port, and they directly is sent to uplink port or with their all or part of replacement part port that is sent to.