The 9300L switches don't appear to support option 15 (domain suffix) running in a DHCP pool on the switch. That is an odd thing to not support. Is there a comprehensive list of everything the 9300L's don't do? Using these seems to be a step back to the bad old days when figuring out what a Cisco box would and would not do was a landmine operation, and the only way to know would sometimes involve finding an FAQ from a Cisco Live event from 3 years ago.