MAC vs DUID issue

[Ted Lemon]

On Apr 2, 2014, at 3:11 PM, Simon Hobson <dhcp1 at thehobsons.co.uk> wrote:
> IIRC there was talk of defining an option to carry the MAC address, but I can't remember what the outcome was, and in any case it could be "some time" (if ever) before all devices send it.

It's a relay agent option, defined in RFC 6939.   Dunno how widespread adoption is in relays, but it's certainly there to be implemented.