Hi Drew,
In the past, when ZTP (not ZTP+) was first introduced (16.1 AFAIR), there also was a thing that allowed an EXOS switch to assign an APIPA on his own if no DHCP offer was given, and that IP was in form of 169.254.xx.yy, where the last two octets are the last two octets from the switch's MAC address. Is it still there?
Kind regards,
Tomasz