i Just upgrate my vCenter 6.5 to 6.7U1, and had problem with Auto deploy server.
Now, When i try to install new server, i got IP from DHCP Server, and when server try to get image from autodeploy TFTP server i got this error:
PXE-E32: TFTP open timeout.
No firewall in this enviromant
DHCP Options configured to redirect to Autodeploy server:
option 67: undionly.kpxe.vmw-hardwierd
option 60: PXEClient
option 67: Autodeploy server IP
tftp service was not started.
i run: service atftpd start
and problem solved