Value of PingER/Ping
Lightweight
- uses existing infrastructure - nothing to install @ remote sites
- low network (100bytes/sec/pair), disk & cpu requirements
- ping itself is mature & well understood
Complementary to more in-depth measurements
- good agreement with Surveyor, relation to wire times understood
- still requires careful validation, calibration & correlation
- duplicate pings (0.2%), out of order packets (ɘ.02%), wire time vs. host reported time, rate limiting, implementation shortcomings