Failed to restart TFTP issue

[NiKiZe]

You should never have more then one DHCP server per network.
Some DHCP servers has redundancy options so that they can work together, but you should never have multiple offers like that.

You can have one DHCP server and one ProxyDHCP but that's different.

For information about how the Microsoft DHCP can be configured see the first part of http://ipxe.org/appnote/chainload_wds and http://ipxe.org/howto/msdhcp