诡异--DHCP的配置

ddns-update-style none;
ignore client-updates;
allow booting;
authoritative;
filename "pxelinux.0";

subnet 192.168.48.0 netmask 255.255.255.0 {
        option routers                  192.168.48.2;
        option subnet-mask              255.255.255.0;
        option domain-name-servers      202.106.0.20;
        option broadcast-address        192.168.48.255;
        option time-offset -18000;
        default-lease-time 21600;
        max-lease-time  -1;
        group {
                host 89 {
                        hardware ethernet 00:0C:29:02:36:7C;
                        fixed-address 192.168.48.89;
                }
                host 90 {
                        hardware ethernet 00:0C:29:5C:0D:2E;
                        fixed-address 192.168.48.90;
                }
        }
}