Install dhcp 

yum install dhcp
 

vim /etc/cobbler/dhcp.template  # adjust ips

vim /etc/cobbler/settings

manage_dhcp: 1
 

vim /etc/xinetd.d/rsync # disable = no

start the service 

service xinetd restart
 

Verify and sync cobbler

cobbler check 
cobbler sync


Enable and start dhcpd

chkconfig dhcpd on
service dhcpd start


Restart satellite service

rhn-satellite restart