搭建dhcp服务，实现ip地址申请分发

 

#注意：实现DHCP服务前，先将网络已有DHCP服务，如：vmware中的DHCP关闭，访止冲突，DHCP服务器本身采用静态IP，必须配置和DHCP网卡的静态IP所在网段的subnet 段,否则DHCP服务无法启动
centos8为服务器，有nat的网卡，和vmnet1的仅主机网卡（vmnet1仅主机网卡作为dhcp服务器的ip）
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[ root@centos8 ~]#yum install -y dhcp-server
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#复制一下模板覆盖到配置文件
[ root@centos8 network-scripts]#cp /usr/share/doc/dhcp-server/dhcpd.conf.example /etc/dhcp/dhcpd.conf
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#编辑配置文件，配置子网和自动获取的地址范围
[ root@centos8 network-scripts]#vim /etc/dhcp/dhcpd.conf
subnet 192.168.33.0 netmask 255.255.255.0 {
range 192.168.33.66 192.168.33.166;
}
# This is a very basic subnet declaration.
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#重启服务，端口67处于监听状态
[ root@centos8 network-scripts]#systemctl restart dhcpd
[ root@centos8 network-scripts]#ss -nul
State      Recv-Q     Send-Q          Local Address:Port            Peer Address:Port
UNCONN     0          0               192.168.122.1:53                   0.0.0.0:*
UNCONN     0          0                     0.0.0.0:67                   0.0.0.0:*
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#客户端上添加一块网卡，选择同样的vmnet1仅主机的网卡。会自动获取到ip地址。
[root@localhost ~]# ifconfig eth1
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.33.66  netmask 255.255.255.0  broadcast 192.168.33.255
        inet6 fe80::76f1:f94a:923:af8a  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:b3:7a:9b  txqueuelen 1000  (Ethernet)
        RX packets 7  bytes 986 (986.0 B)
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