Use Cases for MPLS Network Action Indicators and Ancillary Data
RFC 9791, “Use Cases for MPLS Network Action Indicators and Ancillary Data”, is an Informational document published in July 2025 by T. Saad, K. Makhijani, H. Song, G. Mirsky. The canonical text is published by the RFC Editor.
Abstract
This document presents use cases that have a common feature that may be addressed by encoding network action indicators and associated ancillary data within MPLS packets. There is community interest in extending the MPLS data plane to carry such indicators and ancillary data to address these use cases.
The use cases described in this document are not an exhaustive set but rather the ones that have been actively discussed by members of the IETF MPLS, PALS, and DetNet Working Groups from the beginning of work on MPLS Network Action (MNA) until the publication of this document.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 9791 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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