CN111030939B - Method and device for realizing IPFIX output based on chip - Google Patents
Method and device for realizing IPFIX output based on chip Download PDFInfo
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- CN111030939B CN111030939B CN201911233059.4A CN201911233059A CN111030939B CN 111030939 B CN111030939 B CN 111030939B CN 201911233059 A CN201911233059 A CN 201911233059A CN 111030939 B CN111030939 B CN 111030939B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/22—Traffic shaping
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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Abstract
The invention provides a method and a device for realizing IPFIX output based on a chip, wherein the method comprises the following steps: after the original data enters the ACL Engine, enabling the ACL Engine to perform first sampling on the original data to form first sampling data so as to reduce the data volume converted into the IPFIX Engine; and sending the first sampling data to the IPFIX Engine, and enabling the IPFIX Engine to perform second sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory. According to the method and the device for realizing IPFIX output based on the chip, the local samples after two times of sampling reflect the overall situation of received data, the requirement of transmission bandwidth is met after the first time of sampling, the data amount reaching an IPFIX memory is reduced after the two times of sampling, and the purpose of saving IPFIX flow table resources is achieved.
Description
Technical Field
The invention belongs to the field of communication design, and mainly relates to a method and a device for realizing IPFIX output based on a chip.
Background
The message format defined by IPFIX (IP Flow Information Export) is based on Cisco NetFlow Version9 data Export format, and IP traffic Information can be transmitted from an Exporter (Exporter) to a Collector (Collector). Because IPFIX is a protocol for data flow characteristic analysis and template-based format output, the method has strong expandability and can define different data formats for different requirements.
Whether IPFIX is aimed at which data flow is determined by key configured in the IPFIX flow table; however, the number of data flows in the network is very large and complex, IPFIX needs very many flow table resources to match these data flows, but the memory resources of the chip are limited; in the prior art, if the above requirements need to be met, the chip memory needs to be expanded, so that the cost of the chip is greatly increased.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method and an apparatus for implementing IPFIX output based on a chip.
In order to achieve one of the above objects, an embodiment of the present invention provides a method for implementing IPFIX output based on a chip, where the method includes: after the original data enter the ACL Engine, the ACL Engine carries out first sampling on the original data to form first sampling data so as to reduce the data volume transferred into the IPFIX Engine;
and sending the first sampling data to the IPFIX Engine, and enabling the IPFIX Engine to perform second sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory.
As a further improvement of an embodiment of the present invention, the method further comprises:
configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine; the data volume of the first sampling data is smaller than that of the original data, and the data volume of the first sampling data is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine.
As a further improvement of an embodiment of the present invention, the method further comprises:
configuring the data volume of the second sampling data according to the flow table resources of the IPFIX memory; the data volume of the second sampling data is smaller than that of the first sampling data, and the data volume of the second sampling data is smaller than or equal to the total storage data volume of the flow table resources.
As a further improvement of an embodiment of the present invention, the method further comprises: carrying out first sampling and/or second sampling by adopting a fixed sampling rule;
the fixed sampling rule includes:
when the same data stream is received to reach a preset quantity, sampling currently received 1 data in the same data stream; or sampling the currently received 1 data when the received data stream reaches a preset number;
and forms the sampled data into first sampled data.
As a further improvement of an embodiment of the present invention, the method further comprises: sampling for the first time and/or sampling for the second time by adopting a random sampling rule;
the random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data;
and forms the sampled data into first sampled data.
In order to achieve one of the above objects, an embodiment of the present invention provides an output device for implementing IPFIX on a chip, the device including: the external processing module is used for enabling the ACL Engine to perform first sampling on the original data to form first sampling data after the original data enters the ACL Engine so as to reduce the data volume transferred into the IPFIX Engine;
sending the first sampling data to an IPFIX Engine;
and the internal processing module is used for enabling the IPFIX Engine to perform secondary sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory.
As a further improvement of an embodiment of the present invention, the apparatus further includes: a configuration module for configuring the operation of the mobile terminal,
the configuration module is used for configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine; the data volume of the first sampling data is smaller than that of the original data, and the data volume of the first sampling data is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine.
As a further improvement of an embodiment of the present invention, the apparatus further includes: a configuration module for configuring the operation of the mobile terminal,
the configuration module is used for configuring the data volume of the second sampling data according to the flow table resources of the IPFIX memory; the data volume of the second sampling data is less than that of the first sampling data, and the data volume of the second sampling data is less than or equal to the total storage data volume of the flow table resources.
As a further improvement of an embodiment of the present invention, the external processing module performs a first sampling by using a fixed sampling rule, and/or the internal processing module performs a second sampling by using a fixed sampling rule;
the fixed sampling rule comprises:
sampling currently received 1 data in the same data stream when the same data stream is received to reach a preset quantity; or sampling the currently received 1 data when the received data stream reaches a preset number;
and forms the sampled data into first sampled data.
As a further improvement of the embodiment of the present invention, the external processing module performs the first sampling by using a random sampling rule, and/or the internal processing module performs the second sampling by using a random sampling rule; the random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data;
and forms the sampled data into first sampled data.
Compared with the prior art, the invention has the beneficial effects that: according to the method and the device for realizing IPFIX output based on the chip, the local samples after two times of sampling reflect the overall situation of received data, the requirement of transmission bandwidth is met after the first time of sampling, the data amount reaching an IPFIX memory is reduced after the two times of sampling, and the purpose of saving IPFIX flow table resources is achieved.
Drawings
Fig. 1 is a schematic flowchart of an output method for implementing IPFIX based on a chip according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a specific example of the method of FIG. 1 applied to timing transmission according to the present invention;
FIGS. 3A, 3B, and 3C are diagrams illustrating a structure of applying a fixed sampling rule according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of an output apparatus for implementing IPFIX based on a chip according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
As shown in fig. 1, an output method for implementing IPFIX based on a chip according to an embodiment of the present invention includes:
after the original data enters the ACL Engine, enabling the ACL Engine to perform first sampling on the original data to form first sampling data so as to reduce the data volume converted into the IPFIX Engine;
and sending the first sampling data to the IPFIX Engine, and enabling the IPFIX Engine to perform second sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory.
ACL is an abbreviation of Access Control List, Chinese transliteration: an access control list; IPFIX Engine translates to IPFIX Engine, ACL Engine translates to ACL Engine.
In a preferred embodiment of the present invention, the method further comprises: configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine; the data volume of the first sampling data is smaller than that of the original data, and the data volume of the first sampling data is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine. Therefore, after the original data enters the switch, the bandwidth performance index is matched through the ACL Engine for the first sampling, so that only a part of data flow can enter the IPFIX Engine to meet the requirement of full bandwidth.
Configuring the data volume of the second sampling data according to flow table resources of the IPFIX memory; the data volume of the second sampling data is smaller than that of the first sampling data, and the data volume of the second sampling data is smaller than or equal to the total storage data volume of the flow table resources. For the data entering the IPFIX Engine, for convenience of distinction, the data is represented by first sampling data, and the flow table resources are matched through the IPFIX Engine to perform second sampling, so that a smaller part of data flow can enter the IPFIX memory, and the purpose of saving the flow table resources is achieved.
Referring to fig. 2, in a specific example of the present invention, flow represents original data entering a switch, and after flow enters ACL Engine, ACL Engine performs explicit sampling (i.e. the first sampling) on the original data, in this specific example, 2/3 that samples the original data enters IPFIX Engine; after receiving the 2/3 original data, the IPFIX Engine performs an Internal Sampling (i.e. the second Sampling), and sends the input Internal Sampling 1/2 to the IPFIX memory; that is, for the raw data, only 1/3 data is entered into the IPFIX memory, so that the entire case of data is received by local sample reaction.
In the embodiment of the present invention, the following fixed sampling rule and/or random sampling rule may be adopted to perform the first sampling and/or perform the second sampling.
The fixed sampling rule includes: sampling currently received 1 data in the same data stream when the same data stream is received to reach a preset quantity; or sampling the current received 1 data when the received data stream reaches a preset number; the sampled data is formed into first sampled data.
For convenience of understanding, in a specific example of the present invention, as shown in fig. 3A, every time the same data stream is received by a predetermined number, currently received 1 data is sampled in the same data stream, and the sampled data is formed into first sampled data, which is described.
In this first specific example, the sampling rate is set to 1/5, i.e. every time 5 identical data are received, 1 currently received data are sampled in the same data stream; in this example, from left to right, the first 5 are the same data, so when the 5 th data arrives, the 5 th data is sampled into the next-level storage structure; for the 6 th data, because the same data does not appear behind and in front of the data, the data is not sampled; it should be noted that, this example is second sampling, that is, when this sampling is completed, the 5 th data is forwarded to the IPFIX memory, and accordingly, 1 flow table is learned, and the statistics of the flow table is also 1.
Further, with reference to fig. 3B, the preset premise of fig. 3B is the same as that of fig. 3A, and for the example shown in fig. 3, all of the 6 data from left to right are different data, so in the second sampling process, the sampling is not performed, and accordingly, 0 flow table is learned.
In a second specific example of the present invention, every time a predetermined number of data streams are received, sampling 1 currently received data; forming the sampled data into first sampled data; assuming that the sampling rate is 1/5, in this example, for fig. 3A, the sampling result is the same as the first example, when this sampling is completed, the 5 th data is forwarded to the IPFIX memory, and accordingly, the flow table learns 1 data, and the statistic is also 1.
For the example shown in fig. 3B, the result is slightly different, and correspondingly, in combination with the example shown in fig. 3C, because this example does not determine whether the data is the same, but only counts the amount of the data, so that when the 5 th data arrives, the 5 th data is forwarded to the IPFIX memory, and accordingly, 1 flow table is learned, and the count is also 1.
The random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data; and forms the sampled data into first sampled data.
In the specific example of the present invention, taking ACL Engine sampling as an example, when receiving data, the data is usually a message, and the ACL Engine, according to the matched message fields, for example: a selection id is directly generated from the two layers of macda and macsa, the three layers of ipda and ipsa, and the four layers of l4src and l4dstport to randomly select a polynomial; the polynomials are pre-stored in an ACL Engine, the number of the polynomials can be configured at will according to specific requirements, in the specific example of the invention, 4 polynomials are configured, and when input parameters are the same, random numbers obtained by calculation of each polynomial are different; further, a random number corresponding to the current data can be calculated through the selected polynomial, the random number is compared with a random number threshold preset by the system, and if the random number is smaller than the random number threshold, sampling is performed.
It should be noted that, calculating the random number corresponding to the data according to the message field and by the random polynomial is prior art, and thus, this embodiment is not further described in detail.
Referring to fig. 4, an embodiment of the present invention provides an output apparatus for implementing IPFIX based on a chip, where the apparatus includes: a configuration module 100, an external sampling module 200, and an internal sampling module 300.
After the original data enter the ACL Engine, the ACL Engine carries out first sampling on the original data to form first sampling data so as to reduce the data volume transferred into the IPFIX Engine;
and sending the first sampling data to the IPFIX Engine, and enabling the IPFIX Engine to perform second sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory.
In a preferred embodiment of the present invention, the method further comprises: configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine; the data volume of the first sampling data is smaller than that of the original data, and the data volume of the first sampling data is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine. Therefore, after the original data enters the switch, the ACL Engine is used for matching the bandwidth performance index for the first sampling, so that only a part of data flow enters the IPFIX Engine to meet the requirement of full bandwidth.
Configuring the data volume of the second sampling data according to the flow table resources of the IPFIX memory; the data volume of the second sampling data is smaller than that of the first sampling data, and the data volume of the second sampling data is smaller than or equal to the total storage data volume of the flow table resources. For the data entering the IPFIX Engine, for convenience of distinction, the data is represented by first sampling data, and the flow table resources are matched through the IPFIX Engine to perform second sampling, so that a smaller part of data flow can enter the IPFIX memory, and the purpose of saving the flow table resources is achieved.
Referring to fig. 2, in a specific example of the present invention, flow represents original data entering a switch, and after flow enters ACL Engine, ACL Engine performs explicit Sampling (i.e. the first Sampling) on the original data, in this specific example, 2/3 that samples the original data enters IPFIX Engine; after receiving the 2/3 original data, the IPFIX Engine performs an Internal Sampling (i.e. the second Sampling), and sends the input Internal Sampling 1/2 to the IPFIX memory; that is, for the raw data, only 1/3 data is entered into the IPFIX memory, so that the entire case of data is received by local sample reaction.
In the embodiment of the present invention, the following fixed sampling rule and/or random sampling rule may be adopted to perform the first sampling and/or perform the second sampling.
The fixed sampling rule includes: sampling currently received 1 data in the same data stream when the same data stream is received to reach a preset quantity; or sampling the currently received 1 data when the received data stream reaches a preset number; and forms the sampled data into first sampled data.
The random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data; and forms the sampled data into first sampled data.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the modules described above may refer to the corresponding process in the foregoing method embodiments, and is not described herein again.
In summary, the method and the device for realizing IPFIX output based on the chip of the present invention reflect the overall situation of the received data with the local samples after two times of sampling, meet the requirement of transmission bandwidth after the first time of sampling, reduce the data amount reaching the IPFIX memory after the two times of sampling, and achieve the purpose of saving the IPFIX flow table resources.
The above-described system embodiments are merely illustrative, and the modules described as separate components may or may not be physically separate, and the components shown as modules are logical modules, which may be located in one module in the switch logic or may be distributed to multiple data processing modules in the switch. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. An output method for realizing IPFIX based on a chip is characterized by comprising the following steps:
after the original data enter the ACL Engine, the ACL Engine carries out first sampling on the original data to form first sampling data so as to reduce the data volume transferred into the IPFIX Engine;
sending the first sampling data to an IPFIX Engine, and enabling the IPFIX Engine to perform second sampling on the first sampling data to form second sampling data so as to reduce the data volume converted into an IPFIX memory;
configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine; the data volume of the first sampling data is smaller than that of the original data, and is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine;
configuring the data volume of the second sampling data according to flow table resources of the IPFIX memory; the data volume of the second sampling data is smaller than that of the first sampling data, and the data volume of the second sampling data is smaller than or equal to the total storage data volume of the flow table resources.
2. The chip-based IPFIX output method according to claim 1, further comprising: carrying out first sampling and/or second sampling by adopting a fixed sampling rule;
the fixed sampling rule includes:
when the same data stream is received to reach a preset quantity, sampling currently received 1 data in the same data stream; or sampling the currently received 1 data when the received data stream reaches a preset number;
and forms the sampled data into first sampled data.
3. The chip-based IPFIX output method according to claim 1, further comprising: sampling for the first time and/or sampling for the second time by adopting a random sampling rule;
the random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data;
and forms the sampled data into first sampled data.
4. An output device for implementing IPFIX based on a chip, the device comprising:
the external processing module is used for enabling the ACL Engine to perform first sampling on the original data to form first sampling data after the original data enters the ACL Engine so as to reduce the data volume transferred into the IPFIX Engine;
sending the first sampling data to an IPFIX Engine;
the internal processing module is used for enabling the IPFIX Engine to perform secondary sampling on the first sampling data to form second sampling data so as to reduce the data volume transferred into the IPFIX memory;
the configuration module is used for configuring the data volume of the first sampling data according to the bandwidth performance index of the ACL Engine and configuring the data volume of the second sampling data according to the flow table resource of the IPFIX memory;
the data volume of the first sampling data is smaller than that of the original data, and is smaller than or equal to the total data volume configured by the bandwidth performance index of the ACL Engine;
the data volume of the second sampling data is smaller than that of the first sampling data, and the data volume of the second sampling data is smaller than or equal to the total storage data volume of the flow table resources.
5. The chip-based IPFIX output apparatus according to claim 4, wherein said external processing module performs a first sampling using a fixed sampling rule, and/or said internal processing module performs a second sampling using a fixed sampling rule;
the fixed sampling rule includes:
sampling currently received 1 data in the same data stream when the same data stream is received to reach a preset quantity; or sampling the currently received 1 data when the received data stream reaches a preset number;
and forms the sampled data into first sampled data.
6. The chip-based IPFIX output apparatus according to claim 4, wherein the external processing module performs a first sampling according to a random sampling rule, and/or the internal processing module performs a second sampling according to a random sampling rule;
the random sampling rule comprises: when any data stream is received, calculating a random number corresponding to the data stream according to a message field carried by the current data stream, and if the random number is smaller than a preset random number threshold value, sampling the currently received 1 data;
and forms the sampled data into first sampled data.
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