Archive for May, 2026

RFC 9977: Publishing End-Site Prefix Lengths

May 29, 2026 at 18:33 · Filed under IETF 

RFC 9977
Title:      Publishing End-Site Prefix Lengths
Author:     O. Gasser,
            R. Bush,
            M. Candela,
            R. Housley
Status:     Proposed Standard
Stream:     IETF
Date:       May 2026
Mailbox:    oliver@ipinfo.io,
            randy@psg.com,
            massimo@ntt.net,
            housley@vigilsec.com
Pages:      26
I-D Tag:    draft-ietf-opsawg-prefix-lengths-14.txt
URL:        https://www.rfc-editor.org/info/rfc9977
DOI:        10.17487/RFC9977

This document specifies how to augment the Routing Policy Specification Language (RPSL) inetnum: class to refer specifically to prefixlen files, which are Comma-Separated Values (CSV) files used to specify end-site prefix lengths. This document also describes an optional mechanism that uses the Resource Public Key Infrastructure (RPKI) to authenticate the prefixlen files.

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