Table of Contents
Overview & Future directions of
Internet Monitoring in HEP
Outline of talk
Main tool (PingER) currently uses Ping
Examples of relevance to applications
Scale of Measurements
Worldwide PingER deployment in HENP & ESnet
North America PingER HENP & Esnet deployment
XIWT/IPERF
Nov-98 100 byte pings SLAC - CERN
Improvement in RTT
What about loss?
Improvement in packet loss
Bandwidth improvement from ESnet sites
ESnet, I2, XIWT, Euro-Labs
Importance of Reducing ISPs/AS’s Crossed
Round trip delay distribution snapshot
Ping “Jitter” snapshot (IPD)
Ping response “jitter”
Surveyor “Jitter”
Short term effect of routing change
Change of ISP Impact
Effect of STAR-TAP on KEK.jp <=>
Effect of direct connection
Importance of routing
Poor backup route
Importance of “QoS”
Common Congestion Point
Reachability
Calibration of ping
Natural enemies of ping
Impact of shaping
Ping shaping/blocking
Avoiding
Surveyor / RIPE
Typical Surveyor Reports
Comparing PingER & Surveyor
PingER - Surveyor Complementarity
Surveyor - PingER Correlation
Traceroute/Traceping
Work in progress 1/2
Work in Progress 2/2
Monitoring Conclusions
More Information & extra info follows |