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IANA Registry and Processing Recommendations for the First Nibble Following a Label Stack
RFC 9790

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed metadata: changed keywords to '['Post-stack header', 'Load-balancing']' from '[]'
2026-05-20
(System) Metadata update from RFC Editor
2026-05-20
(System) Changed author "J. Dong": changed name from "Jie Dong" to "J. Dong"
2026-05-20
(System) Changed author "L. Andersson": changed name from "Loa Andersson" to "L. Andersson"
2026-05-20
(System) Changed author "G. Mirsky": changed name from "Greg Mirsky" to "G. Mirsky", changed is_editor from "False" to "True"
2026-05-20
(System) Changed author "M. Bocci": changed name from "Matthew Bocci" to "M. Bocci"
2026-05-20
(System) Changed author "S. Bryant": changed name from "Stewart Bryant" to "S. Bryant"
2026-05-20
(System) Changed author "K. Kompella": changed name from "Kireeti Kompella" to "K. Kompella"
2026-05-20
(System) Metadata update from RFC Editor
2025-07-10
(System) IANA registries were updated to include RFC9790
2025-07-10
(System)
Received changes through RFC Editor sync (created document RFC 9790, created became rfc relationship between draft-ietf-mpls-1stnibble and RFC 9790, set abstract to 'This …
Received changes through RFC Editor sync (created document RFC 9790, created became rfc relationship between draft-ietf-mpls-1stnibble and RFC 9790, set abstract to 'This document creates a new IANA registry (called the "Post-Stack First Nibble" registry) for the first nibble (4-bit field) immediately following an MPLS label stack. Furthermore, this document presents some requirements for registering new values and making the processing of MPLS packets easier and more robust.

The relationship between the IANA "Post-Stack First Nibble" registry and the "IP Version Numbers" registry (RFC 2780) is described in this document.

This document updates RFC 4928 by deprecating the heuristic method for identifying the type of packet encapsulated in MPLS.', set pages to 15, set standardization level to Proposed Standard, added RFC published event at 2025-07-10, created updates relation between RFC 9790 and RFC 4928)
2025-07-10
(System) RFC published