DHCP Assign ip to specific MAC address

gfem · 08-02-2007, 02:29 PM

Can someone point me in the right direction on how to configure dhcp to assign a predefined ip address to a certain MAC address. I ask because the device I have does not allow me to assign a static ip manually. I am using openwrt for the dhcp server.

Thanks.

mackdav · 08-02-2007, 02:38 PM

For the dhcpd that comes with most linux systems, the syntax is to do something like this:

Code:

host system001 # @3c43t1-01-01
{
    hardware ethernet 00:07:E9:25:05:42;
    fixed-address 172.30.0.101;
    option host-name "system001";
}

...in the scope that reflects the IP subnet that you want the system to appear in. So a longer example might look like

Code:

subnet 172.30.0.0 netmask 255.255.255.0
{
    range  172.30.0.150 172.30.0.199;
        option subnet-mask 255.255.255.0;
        option broadcast-address 172.30.0.255;
        option routers 172.30.0.254;
        host system001 # @3c43t1-01-01
        {
            hardware ethernet 00:07:E9:25:05:42;
            fixed-address 172.30.0.101;
            option host-name "system001";
        }
}

gfem · 08-02-2007, 02:58 PM

Thanks. I do not believe that will work. openwrt uses udhcp.