RFC 5952, "A Recommendation for IPv6 Address Text Representation", August 2010

Errata ID: 4986
Status: Rejected
Type: Editorial
Publication Format(s) : TEXT
Reported By: Julian de Prado
Date Reported: 2017-03-31
Rejected by: Erik Kline
Date Rejected: 2021-12-27

Section 2.2 says:

'A special syntax is available to compress the zeros. The use of
"::" indicates one or more groups of 16 bits of zeros.'

It should say:

'A special syntax is available to compress the zeros. The use of
"::" indicates two or more groups of 16 bits of zeros.'

Notes:

"indicates one" should be written as "indicates two"

for example:
'A special syntax is available to compress the zeros. The use of
"::" indicates two or more groups of 16 bits of zeros.'

2001:db8:aaaa:bbbb:cccc::1

2001:db8:aaaa:bbbb:cccc:0:0:1
--VERIFIER NOTES--
RFC 4291, section 2.2, #2 is clear that the current text is valid. Section 4.2.2 contains a specific recommendation for the defined canonical form in this situation. The canonical form is (must be) valid, but not all valid forms are canonical (of necessity :-).

To reach the working group discussion see this thread: https://mailarchive.ietf.org/arch/msg/ipv6/41x17WLwxBoS6AAtH6p0nuC84sk/

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