I have a network consisting mostly of Windows Vista and 7 clients and an Ubuntu server. The server provides both the DHCP and NTP services through dhcp3-server and openntpd.

In my dhcpd.conf, the subnet is declared as follows:

subnet 10.10.10.0 netmask 255.255.255.0 {
        range 10.10.10.10 10.10.10.200;
        option broadcast-address 10.10.10.255;
        option routers 10.10.10.1;
        option ntp-servers 10.10.10.1;
}

The clients don't seem to be using the NTP server though. When I capture the network traffic with Wireshark during the DHCP process, I also see no mention of the NTP option in the DHCP offer message.

I am not quite sure if the clients would have to specifically request that option to receive it or if I have to make another configuration to offer the option.