Gateway ID : x-FFFF-y or x-FFFE-y?

[arjanvanb (Arjan)]

@ivo_noorhoff

This post mentions “In other words, the EUI-64 value was generated by inserting either the value FFFEhex or the value FFFFhex in between eui48[2] and eui48[3].”

For future reference, that quote is written in the past tense, and that very same post also mentions (emphasis mine):

@arjanvanb

But beware it also notes:

Mapping an EUI-48 assigned with an MA-S/OUI-36 or MA-M assignment to an EUI-64 potentially creates a duplicate of an EUI-64 assigned with a different MA-S/OUI-36 or MA-M. The IEEE RA has taken appropriate actions to mitigate creation of duplicates based on this mapping but, to protect the integrity of EUI-64 identifiers, this mapping is deprecated.

(That said, chances for collisions with officially assigned EUIs within the very same TTN network are low.)