dhcpd.conf

option domain-name "satt.local";
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
option ms-classless-static-routes code 249 = array of unsigned integer 8;
option ntp-servers satt.local;
default-lease-time 600;
max-lease-time 7200;

log-facility local7;
authoritative;
ddns-updates on;
ddns-update-style interim;
use-host-decl-names on;
allow client-updates;

ddns-domainname "satt.local";
ddns-rev-domainname "in-addr.arpa";

if exists agent.circuit-id
{
    log ( info, concat(
        "SW-ID: ", suffix(option agent.circuit-id, 5),
        ", Port: ", binary-to-ascii (10, 8, "", substring( option agent.circuit-id, 1, 1)))
    );
}

key DHCP_UPDATER {
        algorithm hmac-md5;
        secret "rdJuK9q33GvCORLY7Xm4Sw==";
};

zone satt.local. {
        primary 127.0.0.1;
        key DHCP_UPDATER;
}

zone 11.168.192.in-addr.arpa. {
        primary 127.0.0.1;
        key DHCP_UPDATER;
}

subnet 192.168.11.0 netmask 255.255.255.0 {
        option routers 192.168.11.1;
        option subnet-mask 255.255.255.0;
        option domain-name-servers 192.168.11.1;
        option broadcast-address 192.168.11.255;
        range 192.168.11.2 192.168.11.254;
        option domain-name "satt.local";

log-facility local7;
authoritative;
ddns-updates on;
ddns-update-style interim;
use-host-decl-names on;
allow client-updates;
ddns-domainname "satt.local";
ddns-rev-domainname "in-addr.arpa";
        }