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

  • Status: Proposed Standard
  • Published: July 2025
  • Stream: IETF
  • Pages: 15
  • Updates: RFC 4928
  • Errata: No Errata

Abstract​

This document creates the "Post-Stack First Nibble" IANA registry for the first nibble immediately following an MPLS label stack and updates RFC 4928 by deprecating heuristic packet-type identification for MPLS.