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Tuesday, January 1, 2008

Information Model and XML Data Model for Traceroute Measurements

The IESG has received a request from the IP Performance Metrics WG
(IPPM) to consider "Information Model and XML Data Model for Traceroute
Measurements" as a Proposed Standard. The IESG plans to make a decision
in the next few weeks, and solicits final comments on this action.
Substantive comments should be sent to the IETF mailing lists by
2008-01-15. Traceroutes are being used by lots of measurement efforts,
either as an independent measurement or to get path information to
support other measurement efforts. That is why there is the need to
standardize the way the configuration and the results of traceroute
measurements are stored. The standard metrics defined by IPPM working
group in matter of delay, connectivity and losses do not apply to the
metrics returned by the traceroute tool; therefore, in order to compare
results of traceroute measurements, the only possibility is to add to
the stored results a specification of the operating system and version
for the traceroute tool used. This document, in order to store results
of traceroute measurements and allow comparison of them, defines a
standard way to store them using a XML schema. Section 7 contains the
XML schema to be used as a template for storing and/or exchanging
traceroute measurements information. The schema was designed in order
to use an extensible approach based on templates (similar to how IPFIX
protocol is designed) where the traceroute configuration elements (both
the requested parameters, Request, and the actual parameters used,
MeasurementMetadata) are metadata to be referenced by results
information elements (data) by means of the TestName element (used as
unique identifier). Currently Open Grid Forum (OGF) is also using this
approach and cross-requirements have been analyzed. As a result of
this analysis the XML schema is compatible with OGF schema since it
was designed in a way that both limits the unnecessary redundancy and
a simple one-to-one transformation between the two exist. More Information

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