The IESG has approved the following document: - 'IS-IS Traffic Engineering (TE) Metric Extensions' (draft-ietf-isis-te-metric-extensions-11.txt) as Proposed Standard This document is the product of the IS-IS for IP Internets Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-isis-te-metric-extensions/ Technical Summary 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. Document Quality 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. Personnel Hannes Gredler is the Document Shepherd. Alvaro Retana is the Responsible Area Director.
