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Status:

INFORMATIONAL

Author:

J. Abley

Stream:

IETF

Source:

NON WORKING GROUP

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DOI:  https://doi.org/10.17487/RFC7043

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Abstract

48-bit Extended Unique Identifier (EUI-48) and 64-bit Extended UniqueIdentifier (EUI-64) are address formats specified by the IEEE for usein various layer-2 networks, e.g., Ethernet.

This document describes two new DNS resource record types, EUI48 andEUI64, for encoding Ethernet addresses in the DNS.

This document describes potentially severe privacy implicationsresulting from indiscriminate publication of link-layer addresses inthe DNS. EUI-48 or EUI-64 addresses SHOULD NOT be published in thepublic DNS. This document specifies an interoperable encoding ofthese address types for use in private DNS namespaces, where theprivacy concerns can be constrained and mitigated.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.