How to auto-provision Brocade switches by DHCP

Going through the documentation (which is pretty shoddy) I can’t seem to figure this out. My best guess, from what I’ve read, is:Unzip firmware distribution into TFTP server rootAdd option 66 pointing to DHCP server (e.g. 192.168.0.1)Add option 67 pointing to manifest file (e.g. FI08070a_Manifest.txt)Reboot switchHowever, after getting a DHCP address there are no attempts by the switch to download the manifest file (but it does try to download a config file.) How does this work?