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RFC 6890, "Special-Purpose IP Address Registries", April 2013

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: int

Errata ID: 3873
Status: Rejected
Type: Technical
Publication Format(s) : TEXT

Reported By: Michael Tuexen
Date Reported: 2014-01-23
Rejected by: Ted Lemon
Date Rejected: 2014-01-23

Section 2.2.3 says:

                 +----------------------+---------------------+
                 | Attribute            | Value               |
                 +----------------------+---------------------+
                 | Address Block        | ::ffff:0:0/96       |
                 | Name                 | IPv4-mapped Address |
                 | RFC                  | [RFC4291]           |
                 | Allocation Date      | February 2006       |
                 | Termination Date     | N/A                 |
                 | Source               | False               |
                 | Destination          | False               |
                 | Forwardable          | False               |
                 | Global               | False               |
                 | Reserved-by-Protocol | True                |
                 +----------------------+---------------------+

                       Table 20: IPv4-Mapped Address

It should say:

                 +----------------------+---------------------+
                 | Attribute            | Value               |
                 +----------------------+---------------------+
                 | Address Block        | ::ffff/96       |
                 | Name                 | IPv4-mapped Address |
                 | RFC                  | [RFC4291]           |
                 | Allocation Date      | February 2006       |
                 | Termination Date     | N/A                 |
                 | Source               | False               |
                 | Destination          | False               |
                 | Forwardable          | False               |
                 | Global               | False               |
                 | Reserved-by-Protocol | True                |
                 +----------------------+---------------------+

                       Table 20: IPv4-Mapped Address

Notes:

The address block for IPv4-Mapped addresses is ::ffff/96 and not ::ffff:0:0/96.
See the following reference which is also given in the table:
http://tools.ietf.org/html/rfc4291#section-2.5.5.2
--VERIFIER NOTES--
The proposed change is in error because it puts the 16 marker bits in the lowest 16 bits of the address, where the low 16 bits of the IPv4 address are supposed to go.

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