Use of /127 Prefix Length Between Routers Considered Harmful
draft-savola-ipv6-127-prefixlen-04

The information below is for an old version of the document that is already published as an RFC
Document Type RFC Internet-Draft (ops)
Author Pekka Savola 
Last updated 2020-01-21 (latest revision 2002-06-28)
Stream Independent Submission
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IESG IESG state RFC 3627 (Historic)
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Responsible AD Randy Bush
Send notices to <pekkas@netcore.fi>
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        RFC 3627

        Title:      Use of /127 Prefix Length Between Routers
                    Considered Harmful
        Author(s):  P. Savola
        Status:     Informational
        Date:       September 2003
        Mailbox:    psavola@funet.fi
        Pages:      6
        Characters: 12436
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-savola-ipv6-127-prefixlen-04.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3627.txt

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.

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