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System Estimation Apparatuses

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  1. Network Measurement Tools ESnet Site Coordinators Meeting 26 April 2000 Tracie Monk, UCSD/SDSC/CAIDA tmonk@caida.org - www.caida.org

  2. Net Monitoring/Management • topology (mapping) • workload characterization (passive) • performance evaluation (active) • routing (dynamics) • visualization (massive datasets) • network management (correlation & integration)

  3. infrastructure: DNS roots • RSSAC, DNS technical advisory committee to ICANN • co-locate skitter hosts w/ root servers • demonstrate root server performance in serving target community • develop techniques for evaluating architectural optimality for root server placement

  4. workload characterization (passive monitoring) • uses: research, equipment design, operational (engineering/security/policing), & accounting • router-based implementations, e.g., cflowd, netflow • stand-alone monitors, e.g., CoralReef (OC3, 12, 48) • persistent real-time full frame collection • security: dynamic pkt filtering trigger by attack precursors • Dag 4.1 (OC48 POS) testing planned 6/00 • NLANR MOAT - 15 monitors collecting traces (http://moat.nlanr.net/pma)

  5. analysis for peering & capacity planning www.caida.org/tools/measurement/cflowd www.caida.org/tools/measurement/coralreef/

  6. CoralReef: operational datahttps://anala.caida.org/CoralReef/Demos/cerfnet/link/

  7. applications summaries

  8. https://anala.caida.org/AIX/

  9. performance evaluation (active) • network engineers to diagnose problems • ISPs & users to verify SLAs & application performance • Internet weather • variations of traditional tools (ping & traceroute) used in most initiatives, e.g. NLANR/MOAT, SLAC, IPWT, Surveyor, commercial services (also treno, mping, & techniques measurement app perf.) • passive methods emerging

  10. skping: rtt/loss & distribution

  11. rtt performance: h/w

  12. perf evaluation priorities • definitions & metrics • working groups, IPPM & CAIDA • bandwidth assessment techniques • passive techniques • correlation • across sources • w/ workload, routing data • large scale deployment • user interface to measurements

  13. routing • 15 year-old technology • minimal measurement/windows makes it difficult to correlate with other data • access to tables infrequent • some route tables available, e.g., Oregon’s RouteViews • active measurement techniques used to gauge route stability

  14. visualization ('big viz') • massive datasets (terabytes) • many data attributes (complex) • multiple viz strategies needed • integration into network utilities -- drill-down critical

  15. multicast monitoringhttp://www.caida.org/tools/measurement/mantra/

  16. network mgmt systems • monitoring • real-time data - snmp data, measurement & configs • trend monitoring - important for planning & diagnostic purposes • integration of both with ticket tracking system & other databases • databases • measurement data (binary file format, e.g. arts++) • RDBMS for net config, contacts, etc. • viz: • intuitive, linked to utilities & drill-down • correlation of multiple datasets • simulations needed for planning, tweaking IGP metrics, etc.

  17. tmonk@caida.orgCooperative Association for Internet Data Analysis (CAIDA)University of California’s San Diego Supercomputer Centerhttp://www.caida.org