The IESG has approved the following document: - 'Model Based Metrics for Bulk Transport Capacity' (draft-ietf-ippm-model-based-metrics-13.txt) as Experimental RFC This document is the product of the IP Performance Measurement Working Group. The IESG contact persons are Mirja Kühlewind and Spencer Dawkins. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-model-based-metrics/ 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.
