I understand there is no difference in terms of config other than different dhcp servers in place.
However can we make we do the basic sanity checks to make sure things are configured in correct way.
Are we able to ping the controller to infobloc dhcp server ?
Is the client VLAN L2 or L3 ? If it is layer 2'; we need to make sure it is been trunked all the way to the server.
Is the default-gateway for the client is controller or external and do we have any relay agent configuration?
Is the DHCP offer reaches the controller ?
To check that please enable debugging from config mode as below
#logging level debugging network process dhcp subcat dhcpd
# show log network all | include <client mac address>
Thanks !