[root@localhost etc]# <input>yum install dhcp</input>
Loaded plugins: fastestmirror, kmod
Loading mirror speeds from cached hostfile
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package dhcp.x86_64 12:4.1.1-31.0.1.P1.el6.centos.1 will be installed
--> Processing Dependency: portreserve for package: 12:dhcp-4.1.1-31.0.1.P1.el6.centos.1.x86_64
--> Running transaction check
---> Package portreserve.x86_64 0:0.0.4-9.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package        Arch      Version                              Repository  Size
================================================================================
Installing:
 dhcp           x86_64    12:4.1.1-31.0.1.P1.el6.centos.1      updates    818 k
Installing for dependencies:
 portreserve    x86_64    0.0.4-9.el6                          base        23 k

Transaction Summary
================================================================================
Install       2 Package(s)

Total download size: 840 k
Installed size: 1.9 M
Is this ok [y/N]: <input>y</input>
<notice>... OUTPUT OMITTED ...</notice>
Installed:
  dhcp.x86_64 12:4.1.1-31.0.1.P1.el6.centos.1

Dependency Installed:
  portreserve.x86_64 0:0.0.4-9.el6

Complete!

ddns-update-style none;

option tftp code 150 = ip-address;
server-name "freepbx.henrik.dk";

subnet 172.24.0.0 netmask 255.255.0.0 {
        range dynamic-bootp 172.24.100.1 172.24.199.255;
        option routers                  172.24.0.1;
        option subnet-mask              255.255.0.0;
        option tftp                     172.24.0.1;
        option domain-name              "Hold2.tekkom.dk";
        option domain-name-servers      10.2.1.11
;
}

[root@localhost etc]# <input>service dhcpd start</input>
Starting dhcpd:                                            [OK]
[root@localhost etc]# <input>chkconfig --level 2345 dhcpd on</input>