1. Measurement Projects Overview
Matt Zekauskas
I2 Measurements WG Meeting
San Diego, CA
20 November 1998
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2. Outline
Classification
Broad project organizations
Specific projects

3. Caveats My personal expertise: active measurements, IETF IPPM
Not exhaustive
Research/education focus
If you see something left out, speak up!

4. Classification Active measurements Passive measurements
Utilization [usually SNMP]
Routing [usually BGP/traceroute]

5. Broad Organizations IETF NLANR CAIDA IP Performance Metrics (IPPM)
Realtime Traffic Flow Measurement (RTFM)
NLANR
Measurement & Operations Analysis Team
National Center for Network Engineering
CAIDA

6. IPPM: Scope Develop metrics that measure
Quality
Performance
Reliability
of Internet data delivery services
Quantitative measures
not a value judgement

7. IPPM: Metrics Framework: RFC2330 Connectivity One-way delay and loss
Round-trip delay and loss
Flow capacity/Bulk transfer capacity
Delay variation (jitter)

8. RTFM Measure network flows through passive measurments Standards for
architecture; metrics for traffic flows
language to describe flows
MIB to control meter & gather measurements
Origin in accounting

9. RTFM Philosophy: aggregate on meter, accurately count everything
Bytes/link, bytes/port, bytes/flow
Rule-based production system
Look at header only

10. Projects IPMA Surveyor RIPE Test Traffic pingER NIMI
NLANR/MOAT NAI corresponding CAIDA deployment?

11. IPMA Routing history tool development (like NLANR/CAIDA)
“Decentralized infrastructure”
MRT, RouteTrackerd, Salamander
ASExplorer, FlapGraph, RouteTracker, ...

12. Surveyor & RIPE TT
Implementations of IPPM one-way metrics: active measurements
also routing via traceroute
Surveyor O(40) machines, mostly US and Canada, now getting some European & Pacific; Target O(100)
RIPE O(15) machines, European focus

13. PingER ESNET / physics community (also XIWT)
Long-term ping measurements
Set of cooperating measurement sites -- not just random hosts

14. NIMI Emphasis on the I - Infrastructure
Platform for network experiments
Outgrowth of Vern’s npd project
Emphasis on active measurements
Currently traceroute, Treno, PoIP
Should be able to roll your own
General (beta) release imminent

15. NIMI Structure “Uniform” platform (hw, os, nimid)
Owners control: CPOC access lists; crypto for security
Researchers schedule experiments: MPOC
nimid handles resource scheduling
Plans for synchronized time source (not yet)

16. Network Analysis Infrastructure
HPNSP focus
Passive measurement infrastructure
Keep headers for research
Adding performance data (active)
Also SNMP data (vBNS today)
Also BGP data (from Oregon RA)

17. Tools: Platform NIMI Windmill UofM/MERIT Passive experimentation focus
Listen to selective protocol messages, and replay locally to understand endpoint state
Example: snooping BGP peering session
Not released; SIGCOMM98

18. Tools: Routing Traceroute servers IPMA tools (based on BGP peering)
Skitter: tomography (CAIDA)

19. Tools: Active performance
Treno
mping (windowed ping): invasive
pathchar: estimate router Qs bottleneck bandwidth
traditional: ping, ftp, ttcp, netperf

20. Tools: Passive NeTraMet: Nevil Brownlee’s RTFM IBM Research’s RTFM
tcpdump
OCxMON: passive optical
Coral
~Cisco’s NetFlow, and
cflowd (CAIDA/ANS)

21. Tools: Utilization
Mainly commercial? Network management tools (e.g., OpenView)
MRTG
NetScarf?

22. Parting Thoughts
Integration with network management? (They want measurement results for operations!)
Don’t neglect commercial tools