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RFC 3627

"Use of /127 Prefix Length Between Routers Considered Harmful", September 2003

Canonical URL:
http://www.rfc-editor.org/rfc/rfc3627.txt
This document is also available in this non-normative format: PDF.
Status:
HISTORIC (changed from INFORMATIONAL)
Obsoleted by:
RFC 6547
Author:
P. Savola
Stream:
INDEPENDENT

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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.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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