Research Article
Revisiting the Issues On Netflow Sample and Export Performance
@INPROCEEDINGS{10.1109/CHINACOM.2008.4685060, author={hamed haddadi and Raul Landa and Andrew Moore and Saleem Bhatti and Miguel Rio and Xianhui Che}, title={Revisiting the Issues On Netflow Sample and Export Performance}, proceedings={ChinaCom2008-Advances in Internet Symposium}, publisher={IEEE}, proceedings_a={CHINACOM2008-AIS}, year={2008}, month={11}, keywords={Sampling NetFlow}, doi={10.1109/CHINACOM.2008.4685060} }- hamed haddadi
Raul Landa
Andrew Moore
Saleem Bhatti
Miguel Rio
Xianhui Che
Year: 2008
Revisiting the Issues On Netflow Sample and Export Performance
CHINACOM2008-AIS
IEEE
DOI: 10.1109/CHINACOM.2008.4685060
Abstract
The high volume of packets and packet rates of traffic on some router links makes it exceedingly difficult for routers to examine every packet in order to keep detailed statistics about the traffic which is traversing the router. Sampling is commonly applied on routers in order to limit the load incurred by the collection of information that the router has to undertake when evaluating flow information for monitoring purposes. The sampling process in nearly all cases is a deterministic process of choosing 1 in every N packets on a per-interface basis, and then forming the flow statistics based on the collected sampled statistics. Even though this sampling may not be significant for some statistics, such as packet rate, others can be severely distorted. However, it is important to consider the sampling techniques and their relative accuracy when applied to different traffic patterns. In this paper, we assess the performance of the sampling process as used in NetFlow in detail, and we discuss some techniques for the compensation of loss of monitoring detail.