Computer Science – Performance
Scientific paper
2007-04-05
Computer Science
Performance
Scientific paper
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. The main disadvantage of sampling is the loss of accuracy in the collected trace when compared to the original traffic stream. To date there has not been a detailed analysis of the impact of sampling at a router in various traffic profiles and flow criteria. 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.
Bhatti Saleem
Haddadi Hamed
Landa Raul
Rio Miguel
No associations
LandOfFree
Revisiting the Issues On Netflow Sample and Export Performance does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Revisiting the Issues On Netflow Sample and Export Performance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revisiting the Issues On Netflow Sample and Export Performance will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-293678