DHCP Server No Subnet Declaration

For the past 2 hours I tried to solve the No Subnet declaratio for enp0s8 (192.168.1.1)

My /etc/dhcp/dhcpd.conf looks like this

authoritative;
default-lease-time 86400;
max-lease-time 86400000;
option broadcast-address 192.168.1.255;
option subnet-mask 255.255.255.0;
option router 192.168.1.1;
option domain-name-servers 192.168.1.1;
option domain-name "xxx.xxx.xx"
subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.11 192.168.0.254;
}
host vmpsateam01-01{ hardware ethernet 08:00:27:82:cd:38 fixed-address 192.168.0.1;
}

The is set to listen on enp0s8 in /etc/default/isc-dhcp-server:

INTERFACESv4="enp0s8"

The static IP address of the network interface is in the subnet:

enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::a00:27ff:fe82:cd38 prefixlen 64 scopeid 0x20<link> ether 08:00:27:82:cd:38 

Also in etc/network/interfaces I configured the router to have a static IP

auto enp0s8
iface enp0s8 inet static address 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.1 gateway 192.168.1.1

Still, when restarting ics-dhcp-server I receive a No subnet declaration for enp0s8 (192.168.1.1) although 192.168.1.1/24 is in the subnet defined in dhcpd.conf. Thanks for any advice!

(I know there are many question like this, but none of them helped so far)

1 Answer

Sorry for necrobumping, but I experienced the same for my isc-dhcp-server setup.

I changed the pool start- and end addresses and after restarting the isc-dhcp-service, the same subnet error as OP described appeared after the systemctl status isc-dhcp-server cmd.

My conclusion is that restarting the isc-dhcp-server.service after implementing changes in its configuration, will not advertise the changes to other network components entirely. So restarting the (virtual) machine should be preferred to apply the changes effectively.