i'm currently in a Linux server class. installed & configured DHCP, the config file is as follows:

subnet 10.1.1.20 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;
option routers 10.1.1.254;
option domain-name-servers 10.1.1.10, 10.1.1.20;
option domain-name "cpt161-02-04.local";
default-lease-time 518400;
max-lease-time 691200;
}

When I restart the service, I keep getting the output "bad subnet number/mask combination. That is the ip address and subnet mask of the server I installed DHCP on so I don't understand the problem. Help plz?

Change
To this and try

1 members found this post helpful.

you are using wrong network and subnet mask. you should use a network mask in SUBNET field not a actual IP address.

#RIGHT
subnet 10.1.1.0 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;



#WRONG
subnet 10.1.1.20 netmask 255.255.255.0 {
range 10.1.1.150 10.1.1.250;

Thanks,
em31amit
Amit M.

1 members found this post helpful.

I actually just tried that before you posted. It seem to work when I restart the service, but when I go to my client and issue the command "sudo dhclient eth0" i get no output, so I can't verify my configurations worked.

Check if your client got the network information from the server.

check what your client and server /var/log/messages file saying ....

Also check the dhcpd.leases file located usually in /etc. If you do not find it, search for the file. It should contain all the leases the server has given to the clients.