Technical Summary
Technical Summary
The document introduces a new class of Model Based Metrics, designed to
assess if a complete Internet path can be expected to meet a predefined
Target Transport Performance by applying a suite of IP diagnostic tests to
successive subpaths. The subpath-at-a-time tests can be robustly applied
to key infrastructure, such as interconnects or even individual devices,
to accurately detect if any part of the infrastructure will prevent paths
traversing it from meeting the Target Transport Performance. Model Based
Metrics exhibit several important new properties not present in other Bulk
Transport Capacity Metrics, including the ability to reason about
concatenated or overlapping subpaths. The results are vantage independent
which is critical for supporting independent validation of tests by
comparing results from multiple measurement points.
Working Group Summary
The document was extensively discussed in the IPPM working group over a
period of three years; comments received during a first WGLC (particularly
with respect to readability) led to extensive changes and a second last
call. There was no particular controversy in the working group.
Document Quality
The document has seen thorough review in the working group. The
experimental methodology it describes has been under continuous
development by the authors during the document's lifetime in the WG.
Personnel
Brian Trammell is the document shepherd.
Spencer Dawkins is the responsible AD.