I am using E3-1265L CPU that can load DS918+ loader, but failed to find IP address, not sure the problem is from CPU or Lan, but there is no issue about DS3615xs loader.
If you're running QEmu-based virtualization (e.g. Proxmox or VirtualBox) set vid to 0x46f4 and pid to 0x0001
If you're running SATA-based boot you can skip vid and pid fields (just remove them)