DHCP

 部署dhcpd服务程序

[root@localhost ~]# yum install dhcp
[root@localhost ~]# cat /etc/dhcp/dhcpd.conf
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.example
# see dhcpd.conf(5) man page

自动管理IP地址

[root@localhost ~]# vim /etc/dhcp/dhcpd.conf
ddns-update-style none;
ignore client-updates;
subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.50 192.168.10.100;
option subnet-mask 255.255.255.0;
option routers 192.168.10.10;
option domain-name-servers 192.168.10.10;
default-lease-time 21600;
max-lease-time 43200;
}

[root@localhost ~]# systemctl restart dhcpd
[root@localhost ~]# systemctl enable dhcpd
ln -s '/usr/lib/systemd/system/dhcpd.service' '/etc/systemd/system/multi-user.target.wants/dhcpd.service'
[root@localhost ~]# systemctl status dhcpd
Active: active (running) since Tue 2019-11-26 11:47:32 CST; 12s ago

[root@localhost ~]# iptables -F
[root@localhost ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[  OK  ]

分配固定IP地址

[root@localhost ~]# cat /var/log/messages
Aug 13 20:14:13 localhost dhcpd: DHCPACK on 192.168.10.50 to 00:0c:29:e3:37:19 (Linuxprobe-PC) via eno16777728
[root@localhost ~]# vim /etc/dhcp/dhcpd.conf
host boss {
        hardware ethernet 00:0c:29:e3:37:19;
        fixed-address 192.168.10.88;
}
host ding {
        hardware ethernet 00:0c:29:1d:84:69;
        fixed-address 192.168.10.99;
}
[root@localhost ~]# systemctl restart dhcpd