RFC 3627 · HISTORIC · 2003

Use of /127 Prefix Length Between Routers Considered Harmful

Overview

RFC 3627, “Use of /127 Prefix Length Between Routers Considered Harmful”, is a Historic document published in September 2003 by P. Savola. It has been obsoleted by RFC 6547 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

Abstract

In some cases, the operational decision may be to use IPv6 /127 prefix lengths, especially on point-to-point links between routers. Under certain situations, this may lead to one router claiming both addresses due to subnet-router anycast being implemented. This document discusses the issue and offers a couple of solutions to the problem; nevertheless, /127 should be avoided between two routers.

Abstract as published in the RFC, via rfc-editor.org.

What “Historic” means

A specification that has been superseded or is otherwise no longer recommended for use.

Read this RFC

The canonical text of RFC 3627 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
Obsoleted by
RFC 6547
Other RFCs from 2003

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