Linux七大项目作业——DHCP

DHCP

[root@lai18 html]# ifconfig  ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.118.118  netmask 255.255.255.0  broadcast 172.16.118.255
        inet6 fe80::cc92:1612:53f5:26dd  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:37:c8:db  txqueuelen 1000  (Ethernet)
        RX packets 7452  bytes 710992 (694.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5802  bytes 857597 (837.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
//ether 00:0c:29:37:c8:db  本机网卡的MAC地址

ping -c 1 172.16.118.118      //ping远程计算机172.16.118.118一次                             
[root@lai18 html]# arp -n                  //查询缓存
Address                  HWtype  HWaddress           Flags Mask            Iface
172.16.118.254                   (incomplete)                              ens33
172.16.118.188           ether   02:00:4c:4f:4f:50   C                     ens33     
 //02:00:4c:4f:4f:50  远程计算机MAC地址

rpm -q dhcp   
yum -y install dhcp      //安装DHCP服务
cp -p /etc/dhcp/dhcpd.conf  /etc/dhcp/dhcpd.conf.bak 
cp  /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example   /etc/dhcp/dhcpd.conf
cp：是否覆盖"/etc/dhcp/dhcpd.conf"？ y    //这里输y
vi   /etc/dhcp/dhcpd.conf       //编辑配置     
//添加以下内容
ddns-update-style none;
log-facility local7;
subnet 172.16.118. 0 netmask 255.255.255.0 {
        range 172.16.118.1  172.16.118.87;     
        range 172.16.118.89  172.16.118.99; 
        range 172.16.118.100  172.16.118.254;         //这是地址池
        option subnet-mask 255.255.255.0;     //定义子网掩码
        option routers 172.16.118.254;      //定义默认网关地址
        option domain-name "cqipc.eud";        //名称
        option domain-name-servers 8.8.8.8,61.128.128.68;  //定义DNS服务器地址
        default-lease-time 600;
        max-lease-time 7200;     //租约时间
}
host  zhangsan{         //为 zhangsan分配固定IP地址
        hardware ethernet 02:00:4c:4f:4f:50;      
        fixed-address  172.16.118.88;
}

systemctl restart dhcpd
systemctl enable dhcpd
cat /var/lib/dhcpd/dhcpd.leases