OSPF Reverse Metric
RFC 9339, “OSPF Reverse Metric”, is a Proposed Standard document published in December 2022 by K. Talaulikar, P. Psenak, H. Johnston. The canonical text is published by the RFC Editor.
Abstract
This document specifies the extensions to OSPF that enable a router to use Link-Local Signaling (LLS) to signal the metric that receiving OSPF neighbor(s) should use for a link to the signaling router. When used on the link to the signaling router, the signaling of this reverse metric (RM) allows a router to influence the amount of traffic flowing towards itself. In certain use cases, this enables routers to maintain symmetric metrics on both sides of a link between them.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9339 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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