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  1. Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications (SIGCOMM '04)
  2. Building a better NetFlow
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A first-principles approach to understanding the internet's router-level topology
Locating internet bottlenecks: algorithms, measurements, and implications
Optimizing cost and performance for multihoming
Link-level measurements from an 802.11b mesh network
A system for authenticated policy-compliant routing
Locating internet routing instabilities
Building a better NetFlow
Sizing router buffers
Impact of configuration errors on DNS robustness
Mercury: supporting scalable multi-attribute range queries
Back to the future part 4: the internet
Vivaldi: a decentralized network coordinate system
An algebraic approach to practical and scalable overlay network monitoring
A comparison of overlay routing and multihoming route control
Comparison of routing metrics for static multi-hop wireless networks
SPV: secure path vector routing for securing BGP
Diagnosing network-wide traffic anomalies
Work-conserving distributed schedulers for Terabit routers
A wavelet-based approach to detect shared congestion
The design and implementation of a next generation name service for the internet
Modeling and performance analysis of BitTorrent-like peer-to-peer networks
Routing design in operational networks: a look from the inside
CapProbe: a simple and accurate capacity estimation technique
The feasibility of supporting large-scale live streaming applications with dynamic application end-points
Routing in a delay tolerant network
Shield: vulnerability-driven network filters for preventing known vulnerability exploits
Network sensitivity to hot-potato disruptions
Exact GPS simulation with logarithmic complexity, and its application to an optimally fair scheduler
Delayed stability and performance of distributed congestion control
A layered naming architecture for the internet
A scalable distributed information management system
Turning the postal system into a generic digital communication mechanism

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Building a better NetFlow

Content Provider ACM Digital Library
Author Estan, Cristian Varghese, George Moore, David Keys, Ken
Abstract Network operators need to determine the composition of the traffic mix on links when looking for dominant applications, users, or estimating traffic matrices. Cisco's NetFlow has evolved into a solution that satisfies this need by reporting flow records that summarize a sample of the traffic traversing the link. But sampled NetFlow has shortcomings that hinder the collection and analysis of traffic data. First, during flooding attacks router memory and network bandwidth consumed by flow records can increase beyond what is available; second, selecting the right static sampling rate is difficult because no single rate gives the right tradeoff of memory use versus accuracy for all traffic mixes; third, the heuristics routers use to decide when a flow is reported are a poor match to most applications that work with time bins; finally, it is impossible to estimate without bias the number of active flows for aggregates with non-TCP traffic.In this paper we propose Adaptive NetFlow, deployable through an update to router software, which addresses many shortcomings of NetFlow by dynamically adapting the sampling rate to achieve robustness without sacrificing accuracy. To enable counting of non-TCP flows, we propose an optional Flow Counting Extension that requires augmenting existing hardware at routers. Both our proposed solutions readily provide descriptions of the traffic of progressively smaller sizes. Transmitting these at progressively higher levels of reliability allows graceful degradation of the accuracy of traffic reports in response to network congestion on the reporting path.
Starting Page 245
Ending Page 256
Page Count 12
File Format PDF
ISBN 1581138628
DOI 10.1145/1015467.1015495
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2004-08-30
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Network monitoring Traffic measurement Data summarization
Content Type Text
Resource Type Article
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