pxe boot installation in linux

Below are the steps to configure a Kick Start Server(192.168.0.254) ::
1:: mkdir -p /data/network-install/RPM
    mkdir /data/network-install/kickstart/
2:: copy entire DVD contents
    cp -r /media/* /data/network-install/RPM/
3:: configure httpd.conf as below then start httpd service and verify http://192.168.0.254/network-install/RPM/
NameVirtualHost 192.168.0.254
<VirtualHost 192.168.0.254>
  ServerName 192.168.0.254
  DocumentRoot /data/
</VirtualHost>
<Directory /data/network-install>
   Options +Indexes
   AllowOverride AuthConfig
   order allow,deny
   allow from all
</Directory>
4:: disable firewall and SELinux of configure to work accordingly
5:: yum install system-config-kickstart
6:: run system-config-kickstart  command to configure and save ks.cfg file into /data/network-install/kickstart/ folder
    http server == 192.168.0.254
    http path   == /network-install/RPM/
    install method == text
    configure disk partition accordingly
    if u want to stop cups , sendmail service in off condition the use below commands in % post script section
    chkconfig cups off
    chkconfig sendmail off

now it is ready for Kick Start installation.............
insert DVD and boot the server. Give below command to start kickstart installation
linux ks=http://192.168.0.254/network-install/kickstart/ks.cfg

 If you have not configured ks.cfg file and just configured a http server then insert DVD and give below command to start installation:
linux askmethod
when prompt comes for Web site name == 192.168.0.254
when prompt comes for Directory     == /network-install/RPM/
==========================================================================

If you want to configure PXE boot Installation Server on the same server then follow below steps:

1:: install below packages using yum command ::
  tftp-server-*
 dhcp-*
 xinetd-*
 system-config-netboot
 syslinux
2:: run below command ::
 cp /usr/lib/syslinux/menu.c32 /tftpboot/
 cp /usr/lib/syslinux/pxelinux.0 /tftpboot/
 cp /media/images/pxeboot/initrd.img /tftpboot/rhel5/
 cp /media/images/pxeboot/vmlinuz /tftpboot/rhel5/
3::    create a file "/tftpboot/pxelinux.cfg/default" and write below lines into the file::
timeout 100
default menu.c32
menu title $$$$$$Boot Menu$$$$$$
label 1
  menu label ^ 1) RHEL5
  kernel rhel5/vmlinuz
  append initrd=rhel5/initrd.img  ks=http://192.168.0.254/network-install/kickstart/ks.cfg  ksdevice=eth0
4::   configure dhcpd.conf

Allow booting;
Allow bootp;
authoritative;
ddns-update-style ad-hoc;
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers               192.168.0.100;
option subnet-mask           255.255.255.0;
option domain-name           "example.com";
option domain-name-servers   192.168.0.254;
default-lease-time           2600;
max-lease-time               4800;
range dynamic-bootp 192.168.0.10 192.168.0.150;
filename  "pxelinux.0";
next-server  192.168.0.254;
}
5:: vi /etc/xinetd.d/tftp
# Open the xinetd settings to enable tftp server.
# at line 14 set the parameter to no from yes.
Disable=no
service xinetd restart

now power on  a server on which you want to install RHEL 6. Select boot from network option  when prompt comes to select boot media or use BIOS options to boot from network.