I have wds server on different network segment from workstations, domain controller, dns server and dhcp server. on segment where is wds server have not dhcp server. on router between those segments I set ip helper-address. on dhcp server that is on mikrotik router of my isp is set option 66 and option 67. when I booted my workstations I receive error
pxe-e32: tftp open timeout.
I made test environment where I moved one workstation on segment where wds server I configured dhcp server on this segment. when I boot this workstation all is working ok.