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Jeremy Johnson

Jeremy Johnson. XYZ.com measured from netVMG. Product Overview—Flow Control Platform. Active Probes UDP/ICMP All available paths Some router config. Measure: Topology Performance (Loss, Latency, Jitter ). Passive Analysis User Data Active Path Physical Tap or Spanned switch port

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Jeremy Johnson

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  1. Jeremy Johnson

  2. XYZ.com measured from netVMG

  3. Product Overview—Flow Control Platform

  4. Active Probes UDP/ICMP All available paths Some router config. Measure: Topology Performance (Loss, Latency, Jitter) Passive Analysis User Data Active Path Physical Tap or Spanned switch port Reconstruct Flows Aggregate by prefix Measure: RTT Volume Flow Collector - Measurement

  5. Some Pictures and Stats Active Probes

  6. Some Pictures and Stats The best path at any given time yields average latency improvements between 25% and 40% vs. the median and worst paths respectively. Active Probes

  7. Some Pictures and Stats Passive Analysis

  8. What’s Measured • Operator specified list • Active prefix by volume or frequency (from netflow/Passive analysis) • Active prefix by performance violation

  9. Process Control - Automated Performance Baseline Static thresholds only useful if operator knows what the threshold should be… Proprietary process control algorithms applied to both active and passive measurement provide dynamic thresholds

  10. Flow Director - Route Insertion • Route Server injects routes via iBGP • Usually full mesh • No-Export by default ensures routes do not ‘leak’ onto public Internet • Routes selected • Via longer prefix (system default /24) • Configurable local preference • Internal loop detection and probe feedback ensure destination is reachable and performing well.

  11. Flowview - Summary Reports Monitoring ofkey performance, usage/cost, and route change activity indicators

  12. Flowview - Detailed Reports Detailed reporting on loss, latency performance, by destination prefix and provider

  13. Path Diversity - How many connections is enough? • Convergence point analysis has proven that for a given distribution of prefixes there is an optimal combination of ISPs. • Diversity is the key…fewer shared hops generally means more choices and the possibility of better performance. Two ISPs may be enough!

  14. Path Diversity - How many connections is enough? Violations lift Latency lift Of course…the more the better!

  15. The FCP in action (macro view) 8 • For our current customers in the last 30 days… • 100% Product Uptime • Over 295,000 route changes • Average Violation is 40ms • 30mb/s Average traffic using the product • 99% of detected service level violations fixed • 40% Average increase in performance • Average decrease in latency is 41ms • Highest daily average decrease was 62ms

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