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How to implement ipfix random sampling

An IPFIX, random sampling technology, applied in the field of computer network, can solve problems such as loss of flow profile description accuracy

Active Publication Date: 2021-04-30
SUZHOU CENTEC COMM CO LTD
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Problems solved by technology

However, since the sampling is performed every N packets, this periodic sampling loses the accuracy of the traffic profile description to a certain extent, which is unacceptable for traffic engineering implementation

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  • How to implement ipfix random sampling
  • How to implement ipfix random sampling

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Embodiment Construction

[0021] In view of the deficiencies in the prior art, the inventor of this case was able to propose the technical solution of the present invention after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0022] A method for realizing IPFIX random sampling proposed by the embodiment of the present invention uses polynomial random numbers to realize random sampling of messages within a specified size window, so as to achieve the purpose that IPFIX sampling is more in line with the actual flow profile and reduces flow table consumption. Described method specifically comprises:

[0023] S1. Configure the random sampling interval of the chip as the sampling window size;

[0024] S2. In the current sampling window, when the chip receives the first message, trigger the polynomial random number generator to generate a random number;

[0025] S3. The chip selects the message to be sampled...

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Abstract

The invention discloses a method for realizing IPFIX random sampling, comprising: configuring the random sampling interval of the chip as the size of the sampling window; in the current sampling window, when the chip receives the first message, a polynomial random number generator is triggered to generate a random number; the chip selects the required sampled message according to the random number, and sends the sampled message to the IPFIX engine; after the last message in the current sampling window arrives, the current sampling process ends and enters the next sampling window, wherein, The polynomial random number generator selects a random polynomial with a corresponding bit width according to the sampling interval and generates a random number. The present invention realizes random sampling of messages within a specified size window through polynomial random numbers, thereby achieving the purpose of IPFIX sampling more in line with actual flow profiles and reducing flow table consumption.

Description

technical field [0001] The invention relates to computer network technology, in particular to a method for realizing IPFIX random sampling. Background technique [0002] IPFIX (IP Flow Information Export, IP Flow Information Export) is a statistical technology based on network IP flow information, which can perform statistics and analysis on the service flow in the network. It has been widely used in network management fields such as billing, network planning, network monitoring, user monitoring and analysis, and has been accepted by a large number of network equipment manufacturers for its good scalability and flexibility. [0003] The basic principle of the switch chip to realize IPFIX (IP Flow Information Export) is: through the IPFIXEngine to realize the statistics and monitoring of IP data flow in various aspects, in which the IPFIX Engine mainly includes Key (hash search to identify the flow) and Record (to carry out relevant statistics on the flow) , such as the stat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26
CPCH04L43/022H04L43/0876H04L43/10
Inventor 刘庆海李晨龚海东
Owner SUZHOU CENTEC COMM CO LTD
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