This document describes extensions to IS-IS Traffic Engineering
Extensions (RFC5305) such that network performance information can be
distributed and collected in a scalable fashion. The information
distributed using ISIS TE Metric Extensions can then be used to make
path selection decisions based on network performance.
Note that this document only covers the mechanisms with which network
performance information is distributed. The mechanisms for measuring
network performance or acting on that information, once distributed,
are outside the scope of this document.
Working Group Summary
There has been much discusson as to how these metrics would be
collected and how they will be used. These topics were deemed to
to be out of scope.
There was also concern for potential overhead of collecting
and flooding these metrics. In response, the draft contains
guidance as to how often the measurements should be collected and
flooded. Additionally, the draft now recommends configuration
to control measurement usage and the thresholds for advertisement.
This document has been a WG document for a more than two years.
It is stable, without changes to the technical solution for more
than 12 months.
Hannes Gredler is the Document Shepherd.
Alvaro Retana is the Responsible Area Director.