I-D Action: draft-ietf-mpls-1stnibble-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts
directories. This Internet-Draft is a work item of the Multiprotocol Label
Switching (MPLS) WG of the IETF.

   Title           : IANA Registry for the First Nibble Following a Label Stack
   Authors         : Kireeti Kompella
                     Stewart Bryant
                     Matthew Bocci
                     Greg Mirsky
                     Loa Andersson
   Filename        : draft-ietf-mpls-1stnibble-01.txt
   Pages           : 14
   Date            : 2023-05-30

Abstract:
   The goal of this memo is to create a new IANA registry (called the
   MPLS First Nibble registry) for the first nibble (4-bit field)
   immediately following an MPLS label stack.  The memo offers a
   rationale for such a registry, describes how the registry should be
   managed, and provides some initial entries.  Furthermore, this memo
   sets out some documentation requirements for registering new values.
   Finally, it provides some recommendations that makes processing MPLS
   packets easier and more robust.

   There is an important caveat on the use of this registry versus the
   IP version number registry.

   This memo, if published, would update [RFC4928] and [RFC8469].

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