Improperly formatted MAC address can prevent the DHCP server from working

[Steve and Karyn Strobel]

While setting up a new Adtran 854-6 (PN:1760026F1S#SHR) router from my
ISP, I entered some DHCP address reservations.  It is running
"SMART/OS powered by OpenWRT" firmware version 25.6.6.1 (US).

For most of the MAC addresses I used colons between the octets, e.g.
18:03:73:D8:D8:B7.  For one, I cut-and-pasted in the format that
Windows 11's "ipconfig /all" uses, with dashes, e.g.
18-03-73-D8-D8-B7.  That seemed to prevent the DHCP server from
working at all.

I was able to regain control by manually setting my laptop to an IP
address in the correct subnet and connecting to the router with an
Ethernet cable, then fixing the formatting of the MAC address.

Steve Strobel