ubuntu 开启dhcp服务并配置

1.配置所有网口支持DHCP

vim /etc/default/isc-dhcp-server

INTERFACES="eno1 eno2 eno3 eno4"

2.所有网口ip地址配置

vim /etc/network/interfaces
auto eno1
iface eno1 inet static
address 172.19.75.15
netmask 255.255.252.0
gateway 172.19.75.253


auto eno2
iface eno2 inet static
address 172.19.85.15
netmask 255.255.252.0

auto eno3
iface eno3 inet static
address 172.19.95.15
netmask 255.255.252.0

auto eno4
iface eno4 inet static
address 172.19.65.15
netmask 255.255.252.0

3.配置DHCP多网段subnet范围

vim /etc/dhcp/dhcpd.conf

subnet 172.19.75.0 netmask 255.255.255.0 {
        range 172.19.75.37 172.19.75.50;
        option broadcast-address 172.19.75.255;
        option routers 172.19.75.253;
        default-lease-time 600;
        max-lease-time 7200;
        next-server 172.19.75.15;
        filename "pxelinux.0";
}


subnet 172.19.85.0 netmask 255.255.255.0 {
        range 172.19.85.37 172.19.85.50;
        option broadcast-address 172.19.85.255;
        option routers 172.19.85.253;
        default-lease-time 600;
        max-lease-time 7200;
        next-server 172.19.85.15;
        filename "pxelinux.0";
}

subnet 172.19.95.0 netmask 255.255.255.0 {
        range 172.19.95.37 172.19.95.50;
        option broadcast-address 172.19.95.255;
        option routers 172.19.95.253;
        default-lease-time 600;
        max-lease-time 7200;
        next-server 172.19.95.15;
        filename "pxelinux.0";
}

subnet 172.19.65.0 netmask 255.255.255.0 {
        range 172.19.65.37 172.19.65.50;
        option broadcast-address 172.19.65.255;
        option routers 172.19.65.253;
        default-lease-time 600;
        max-lease-time 7200;
        next-server 172.19.65.15;
        filename "pxelinux.0";
}