1) dhcp설치

[root@localhost ~]# yum –y install dhcp*

2-1) dhcp설정

[root@localhost ~]# vi /etc/dhcp/dhcpd.conf

#

# DHCP Server Configuration file.

#   see /usr/share/doc/dhcp*/dhcpd.conf.sample #샘플 config 참조

#   see 'man 5 dhcpd.conf' #man 페이지 참조

2-2) dhcp설정

root@localhost:[~]: cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf #샘플 config복사

root@localhost:[~]: vi /etc/dhcp/dhcpd.conf

# dhcpd.conf

#

# Sample configuration file for ISC dhcpd

#

default-lease-time 6000; #IP기본 사용 시간

max-lease-time 72000; #IP최대 사용 시간

subnet 192.168.126.0 netmask 255.255.255.0 { #dhcp서버 IP대역

 range 192.168.126.201 192.168.126.253; #client IP할당 대역

 option routers 192.168.126.2; #게이트웨이

 option subnet-mask 255.255.255.0; #서브넷마스크

 option domain-name-servers 8.8.8.8; #dns서버

##샘플 config에서 필요한 설정만 수정해도 되지만 위와 같이 전체 삭제 및 필요설정 추가

3) dhcp서비스 시작 및 확인

root@localhost:[~]: systemctl start dhcpd

root@localhost:[~]: netstat -lnp | grep dhcp

4) client IP설정

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

[root@localhost ~]# service network restart

5) client IP 및 mac address 확인

[root@localhost ~]# service network restart

[root@localhost ~]# ip a

6) dhcp서버 IP할당 내역 확인

root@localhost:[~]: cat /var/lib/dhcpd/dhcpd.leases

7) 실습환경

dhcp서버: CentOS7

dhcp client: CentOS6.5

네트워크 구성: NAT (서버/client)