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Status:

EXPERIMENTAL

Authors:

M. Mathis
A. Morton

Stream:

IETF

Source:

ippm (ops)

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DOI:  https://doi.org/10.17487/RFC8337

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Abstract

This document introduces a new class of Model-Based Metrics designedto assess if a complete Internet path can be expected to meet apredefined Target Transport Performance by applying a suite of IPdiagnostic tests to successive subpaths. The subpath-at-a-time testscan be robustly applied to critical infrastructure, such as networkinterconnections or even individual devices, to accurately detect ifany part of the infrastructure will prevent paths traversing it frommeeting the Target Transport Performance.

Model-Based Metrics rely on mathematical models to specify a TargetedIP Diagnostic Suite, a set of IP diagnostic tests designed to assesswhether common transport protocols can be expected to meet apredetermined Target Transport Performance over an Internet path.

For Bulk Transport Capacity, the IP diagnostics are built using teststreams and statistical criteria for evaluating the packet transferthat mimic TCP over the complete path. The temporal structure of thetest stream (e.g., bursts) mimics TCP or other transport protocolscarrying bulk data over a long path. However, they are constructedto be independent of the details of the subpath under test, endsystems, or applications. Likewise, the success criteria evaluatesthe packet transfer statistics of the subpath against criteriadetermined by protocol performance models applied to the TargetTransport Performance of the complete path. The success criteriaalso does not depend on the details of the subpath, end systems, orapplications.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.