MAC-48 The term MAC-48 is now obsol

MAC-48 The term MAC-48 is now obsolete. The MAC-48 was similar to the EUI-48, i.e., it was a concatenation of a 24-bit OUI assigned by the IEEE RA and a 24-bit extension identifier assigned by the organization with that OUI assignment. However, it was used to address hardware interfaces within existing 802- based networking applications. The term EUI-48 was historically used to identify a design instance, as opposed to a hardware interface; examples include software interface standards (such as VGA), the model number for a product, and the form/function of vendor-specific content. The subtle difference between MAC-48 and EUI-48 was not well understood, so the term EUI-48 is now used for both uses, and the term MAC-48 identifier is now obsolete. (The IEEE RAC is not aware of any cases, but if MAC-48 is used as the name for any 48-bit MAC address, then EUI-48 is not the appropriate replacement term for MAC-48, as EUI-48 only refers to individual, universally/globally unique network addresses.)EUI-60 The EUI-60 should not be used in future applications. There is no plan to eliminate the use of these EUI-60 values in the foreseeable future. EUI-64 (as opposed to EUI-60) identifiers should be used in future applications, future standards, and revisions and amendments of existing standards requiring the use of unique per-hardware instance identifiers. CDI-32 and CDI-40 CDI-32 and CDI-40 were historically recommended as context dependent identifiers. CDI-32 was, historically, a concatenation of an OUI value assigned by the IEEE RA and an 8-bit extension identifier assigned by the organization with that OUI assignment. CDI-40 was, historically, a concatenation of an OUI value assigned by the IEEE RA and a 16-bit extension identifier assigned by the organization with that OUI assignment.