File formats:

Status:

PROPOSED STANDARD

Updates:

RFC 3032

Updated by:

RFC 5462, RFC 7274

Author:

E. Rosen

Stream:

IETF

Source:

mpls (rtg)

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC4182

Discuss this RFC: Send questions or comments to the mailing list mpls@ietf.org

Other actions: View Errata  |  Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 4182

Abstract

The label stack encoding for Multi-protocol Label Switching (MPLS) defines a reserved label value known as "IPv4 Explicit NULL" and a reserved label value known as "IPv6 Explicit NULL". Previously, these labels were only legal when they occurred at the bottom of the MPLS label stack. This restriction is now removed, so that these label values may legally occur anywhere in the stack.

This document updates RFC 3032. [STANDARDS-TRACK]

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.