DHCP is working good in RHEL6 

Server Configuration: 
Step1: install the following rpm

rpm -ivh dhcp-4.1.1-12.P1.el6.i686.rpm
Step 2: cp /usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample /etc/dhcp/dhcpd.conf 
Step 3: change the range of ip address as per your wish.
Step 4: service dhcpd restart
Step 5: chkconfig dhcpd on

Client Configuration:
Step 1: dhclient
Step 2: check the following file
/etc/resolv.conf


Sample file: Copy and paste the specified location /etc/dhcp/dhcpd.conf and get the dhcp service

# dhcpd...
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