Transcript Measurement Projects Overview

Measurement Projects
Overview
Matt Zekauskas
[email protected]
I2 Measurements WG Meeting
San Diego, CA
20 November 1998
Outline
Classification
Broad project organizations
Specific projects
Caveats
My personal expertise: active
measurements, IETF IPPM
Not exhaustive
Research/education focus
If you see something left out,
speak up!
Classification
Active measurements
Passive measurements
Utilization [usually SNMP]
Routing [usually BGP/traceroute]
Broad Organizations
IETF
• IP Performance Metrics (IPPM)
• Realtime Traffic Flow Measurement (RTFM)
NLANR
• Measurement & Operations Analysis Team
• National Center for Network Engineering
CAIDA
IPPM: Scope
Develop metrics that measure
• Quality
• Performance
• Reliability
of Internet data delivery services
Quantitative measures
• not a value judgement
IPPM: Metrics
Framework: RFC2330
Connectivity
One-way delay and loss
Round-trip delay and loss
Flow capacity/Bulk transfer capacity
Delay variation (jitter)
http://www.advanced.org/IPPM/
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
RTFM
Philosophy: aggregate on meter,
accurately count everything
Bytes/link, bytes/port, bytes/flow
Rule-based production system
Look at header only
http://www.auckland.ac.nz/net/Internet/rtfm
Projects
IPMA
Surveyor
RIPE Test Traffic
pingER
NIMI
NLANR/MOAT NAI
corresponding CAIDA deployment?
IPMA
Routing history
tool development (like
NLANR/CAIDA)
“Decentralized infrastructure”
MRT, RouteTrackerd, Salamander
ASExplorer, FlapGraph,
RouteTracker, ...
http://www.merit.edu/ipma
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
PingER
ESNET / physics community
(also XIWT)
Long-term ping measurements
Set of cooperating measurement
sites -- not just random hosts
 http://www.slac.stanford.edu/xorg/icfa/ntf/home.html
 http://www.slac.stanford.edu/xorg/icfa/ntf/tool.html
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
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)
http://www.ncne.org/
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)
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
Tools: Routing
Traceroute servers
IPMA tools (based on BGP peering)
Skitter: tomography (CAIDA)
Tools: Active performance
Treno
mping (windowed ping): invasive
pathchar: estimate router Qs
bottleneck bandwidth
traditional: ping, ftp, ttcp, netperf
Tools: Passive
NeTraMet: Nevil Brownlee’s RTFM
IBM Research’s RTFM
tcpdump
OCxMON: passive optical
Coral
~Cisco’s NetFlow, and
cflowd (CAIDA/ANS)
Tools: Utilization
Mainly commercial? Network
management tools (e.g., OpenView)
MRTG
NetScarf?
Parting Thoughts
Integration with network
management? (They want
measurement results for operations!)
Don’t neglect commercial tools