[Softwires] [Errata Verified] RFC7599 (5225)

RFC Errata System <rfc-editor@rfc-editor.org> Wed, 08 January 2020 22:05 UTC

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Subject: [Softwires] [Errata Verified] RFC7599 (5225)
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The following errata report has been verified for RFC7599,
"Mapping of Address and Port using Translation (MAP-T)". 

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid5225

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Status: Verified
Type: Technical

Reported by: Ole Troan <ot@cisco.com>
Date Reported: 2018-01-03
Verified by: √Čric Vyncke (IESG)

Section: 6

Original Text
-------------
In the case of an IPv4 prefix, the IPv4 address field is right-padded
with zeros up to 32 bits.  The PSID is left-padded with zeros to
create a 16-bit field.  For an IPv4 prefix or a complete IPv4
address, the PSID field is zero.

Corrected Text
--------------
The PSID is left-padded with zeros to
create a 16-bit field.  For an IPv4 prefix or a complete IPv4
address, the PSID field is zero.

Notes
-----
This text has been copied from RFC7597 (MAP-E). While it is correct in the context of MAP-E, for MAP-T the complete IPv4 source address must be embedded in the interface-identifier for correct translation in the case of an IPv4 prefix. Right padding the prefix with zeroes would lead to the translated packet having all zeroes in its source address.

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RFC7599 (draft-ietf-softwire-map-t-08)
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Title               : Mapping of Address and Port using Translation (MAP-T)
Publication Date    : July 2015
Author(s)           : X. Li, C. Bao, W. Dec, Ed., O. Troan, S. Matsushima, T. Murakami
Category            : PROPOSED STANDARD
Source              : Softwires
Area                : Internet
Stream              : IETF
Verifying Party     : IESG