DHCP relay should help. Page 336 https://downloads.dell.com/manuals/all-products/esuprt_ser_stor_net/esuprt_networking/esuprt_net_fxd...
The easiest way is to upload it somewhere and post the link.
Are you still having issues with dhcp? Nothing stood out as wrong in the config.
Thanks for looking Josh. I am next at the customer site on Monday.
I have applied the changes via CLI on a machine I have in the Server Room but to fully test I need to be physically there.