RFC 7599, "Mapping of Address and Port using Translation (MAP-T)", July 2015Source of RFC: softwire (int)
See Also: RFC 7599 w/ inline errata
Errata ID: 5225
Publication Format(s) : TEXT
Reported By: Ole Troan
Date Reported: 2018-01-03
Verifier Name: Éric Vyncke
Date Verified: 2020-01-08
Section 6 says:
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.
It should say:
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.
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.