Redhat7.3-dhcp and dhcp relay server configuration
1. Set host, firewald, selinux
Hostnamectl set-hostname fengxiaoli41.com
Systemctl stop firewalld.service
Systemctl disable firewalld.service
Setenforce 0
two。 Configure basic dhcp services
Yum install-y dhcp
Vim / etc/dhcp/dhcpd.conf
# Global parameters
Option domain-name "fengxiaoli41.com"
Option domain-name-servers dns.fengxiaoli41.com
Default-lease-time 600
Max-lease-time 7200
Authoritative
Log-facility local7
# configure 192.168.1.0 network segment dynamic acquisition
Subnet 192.168.1.0 netmask 255.255.255.0 {
Range dynamic-bootp 192.168.1.20 192.168.1.254
Option broadcast-address 192.168.1.255
Option routers 192.168.1.1
}
# configure the 192.168.1.0 network to assign a fixed ip to the mac
Host feng {
# hardware ethernet MAC
Fixed-address 192.168.1.5
}
Systemctl restart dhcpd
Systemctl status dhcpd
-at this point, clients can obtain dynamic and fixed ip
3. Relay server
Vim / etc/dhcp/dhcpd.conf
# configure 192.168.2.0 as the dhcp relay network segment (if not in the middle)
Subnet 192.168.2.0 netmask 255.255.255.0 {
Range dynamic-bootp 192.168.2.20 192.168.2.254
Option broadcast-address 192.168.2.255
Option routers 192.168.2.254
}
Cp / lib/systemd/system/dhcrelay.service / etc/systemd/system/
Cd / etc/systemd/system/
Vim dhcrelay.service
[Service]
ExecStart=/usr/sbin/dhcrelay-d-no-pid 192.168.1.10
4. Restart the service
Systemctl-system daemon-reload
Systemctl restart dhcrelay.service
Note: before configuration, ensure the network interconnection between the dhcp server and the relay server, the dhcp server is 192.168.1.0 network segment, and the relay server 192.168.2.0 network segment. In addition, two network cards can be added to the dhcp server to configure the relay server and the dhcp server on the same server.
