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Distributed Monitoring CERNET's experience

Distributed Monitoring CERNET's experience. Xing Li 2004-07-03. CERNET Transport Network. CERNET IP Backbone. CERNET Statistics. 38 GigaPops distributed in 36 cities , covering all the provinces in Mainland China. 11 national Pops are connected via multiple 2.5Gbps DWDM links

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Distributed Monitoring CERNET's experience

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  1. Distributed Monitoring CERNET's experience Xing Li 2004-07-03

  2. CERNET Transport Network

  3. CERNET IP Backbone

  4. CERNET Statistics • 38GigaPops distributed in 36cities, covering all the provinces in Mainland China. • 11national Pops are connected via multiple 2.5Gbps DWDM links • 27 provincial Pops are connected via multiple 155Mbps SDH links • 1,500 education and research institutions connected • 300 campus networks connect to their nearest Pops via 100Mbps-1Gbps links. • 15 million users

  5. CERNET Distributed Measurement • Provide the high performance, reliable IP backbone service • Survive from the network attack • Run based on self-funded model • Protect mission critical applications • produce research data

  6. Comparison of Current Data and Tools • Netflow • Owamp (One-Way Latency) • Iperf • Traceroute • SNMP Interface Statistics • Internet2 Detective • Multicast Beacon • NTP Stratum 2 Server • Ping/Traceroute V6 Destination

  7. Current Tools and Analysis • Throughput • SNMP interface • passive monitoring • httpd+wget • Delay and Loss • ICMP • Top 20 • passive monitoring • Multicast • Beacon

  8. M2.1 M2.2 s R2.1 12410 R20.1 6509 Passive Monitoring

  9. Performance

  10. Loss vs. Delay

  11. CERNET HTTP Performance

  12. Top20 Histogram

  13. Multicast Beacon Monitoring

  14. Correlation Analysis • Delay Matrix • Loss Matrix • Combined Pop Monitoring • Committed bandwidth http performance • Top 20 Warning

  15. CERNET Delay Matrix

  16. CERNET Loss Matrix

  17. Pop Monitoring

  18. Global Internet 20M CERNET 1G Cx Committed bandwidth http performance

  19. Top20 Monitoring

  20. Other Tools and Activities • Iperf • NTP • DNS • BGP • tcping • Out of Order Packet • Video Conference • CCERT

  21. NTP

  22. Address and Domains Report

  23. IPv4/IPv6 BGP Analysis

  24. tcping

  25. Multicast Video Conference

  26. CCERT

  27. Comparison (1) • Netflow • Owamp (One-Way Latency) • Iperf • Traceroute • SNMP Interface Statistics • Internet2 Detective • Multicast Beacon • NTP Stratum 2 Server • Ping/Traceroute V6 Destination

  28. Collection Today: Iperf (Throughput) OWAMP (1-Way Latency, Loss) SNMP Data Anonymized Netflow Data Per Sender, Per Receiver, Per Node Pair IPv4 and IPv6 Collection in the Future NTP (Data) Traceroute BGP Data First Mile Analysis Correlation Today: “Worst 10” Throughputs “Worst 10” Latencies Correlation in the Future: 99th Percentile Throughput over Time Throughput/Loss for all E2E paths using a specific link Commonalities among first mile analyzers Sum of Partial Paths vs. Whole Path Comparison (2)

  29. Analysis Today: Throughput over Time Latency over Time Loss over Time Worrisome Tests? (Any bad apples in “Worst Ten”?) “Not the Network” (If “Worst Ten” is good enough) Analysis in the Future: Latency vs. Loss How good is the network? Do common first mile problems exist? Does a link have problems that only manifest in the long-haul? Is the network delivering the performance required by a funded project? Comparison (3)

  30. Future Work • Expend to the CERNET member universities • IPv6 • New Tools • Data library • International collaboration • APAN • Abilene Observatory

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