DHCPD issue parameters

[Teva AVRIL-TEIPOARII]

Greetings,

I've got a dhcpd server, which is working good. However i've got an issue:
i've modified one parameter on the dhcpd.conf for one subnet (i've changed
option domain-name-servers ip), i've restarted the dhcpd service.

My issue is i've got an ip address, but not the update DNS-servers.

Here below configuration of the dhcpd.conf before modification:

shared-network test {
option domain-name "test.com";
option domain-name-servers 192.168.1.2, 192.168.1.3;
default-lease-time 360;
max-lease-time 360;

subnet 192.168.10.0 netmask 255.255.255.0 {
option routers 192.168.10.254;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.10.255;
}

pool {
range 192.168.10.1 192.168.10.253;
}
}

And now after modification:

shared-network test {
option domain-name "test.com";
option domain-name-servers 192.168.45.1, 192.168.1.3;
default-lease-time 360;
max-lease-time 360;

subnet 192.168.10.0 netmask 255.255.255.0 {
option routers 192.168.10.254;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.10.255;
}

pool {
range 192.168.10.1 192.168.10.253;
}
}

And here below global parameters applied to all subnets:


ddns-update-style none;
authoritative;
log-facility local7;
update-static-leases on;




The result is that instead of having 192.168.45.1 and 192.168.1.3 as primary
and secondary DNS, i still got 192.168.1.2 and 192.168.1.3 as primary and
secondary DNS.

I've deleted dhcpd.leases , thinking that maybe the issue could come from
some leases not expired, but result is the same.

I've performed a wireshark capture, and during the DORA process, i see that
the DHCP server is sending the update DNS as it should. However on my PC (on
Windows), i still see old DNS servers attributed (attribution is automatic,
it's not in static on network configuration of the PC).

I don't understand where this problem come from, if you have an idea, please
let me know.