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Here is a short description to configure a PXE server using dhcpd and tftpd.
This allows a network boot for your ethernet card conforming to the Interl
PXE specification.
********************************************************************************
********** General overview ************
********************************************************************************
You need a dhcp server and a tftp server on one or two machines to allow the
network boot. We are not using a PXE server to achieve this as it is not
mandatory.
You can install tftp-server and dhcp-server package from the Mandrake
distribution for example.
On the server machine at 192.168.2.1, you will find a "/etc/dhcpd.conf" sample
file written by Florin Grad <florin>, where "mydomain.com" is
assumed to be your domain name, and 192.168.1.1 a name server. All install are
done on subnet 192.168.2.0.
All the files that will be downloaded by the tftp daemon are located under
"/tftpboot" :
"/tftpboot/pxelinux.0" is a program that is loaded directly by the machine
where a network boot will be done, this program comes
from the SYSLINUX package by H. Peter Anvin. (look at
http://syslinux.zytor.com/pxe.php for more information)
"/tftpboot/pxelinux.cfg/" is a directory where all configuration file for
pxelinux.0 will be found, pxelinux.0 will download
these file by itself. It searches first for a file
named accordind to the machine IP address in
hexadecimal, for example for 192.168.2.20, it
looks for "C0A80214" first, then "C0A8021" and so
on down to "C0", "C" and "default".
"/tftpboot/network.rdz" is the standard network initrd for Mandrake installation.
"/tftpboot/vmlinuz" is the boot kernel for installation.
"/tftpboot/help.msg" is the message displayed by pxelinux.0, note that currently
graphical message (as for install using SYSLINUX 1.48 with
graphic patch by Mandrake) is not supported.
All file "network.rdz", "vmlinuz", "help.msg" can be found by mounting "network.img",
or the network floppy disk used for install, "pxelinux.cfg" is just an adaptation
of the file found on the "network.img" called "syslinux.cfg" but without the reference
to boot.msg (as it is not currently supported).
Update network configuration for your needs and start dhcp server on the machine and
tftp server and this should work.
********************************************************************************
* /etc/dhcpd.conf **************************************************************
********************************************************************************
ddns-update-style ad-hoc;
authoritative;
option space PXE;
option PXE.mtftp-ip code 1 = ip-address;
option PXE.mtftp-cport code 2 = unsigned integer 16;
option PXE.mtftp-sport code 3 = unsigned integer 16;
option PXE.mtftp-tmout code 4 = unsigned integer 8;
option PXE.mtftp-delay code 5 = unsigned integer 8;
option PXE.discovery-control code 6 = unsigned integer 8;
option PXE.discovery-mcast-addr code 7 = ip-address;
default-lease-time 28800;
max-lease-time 86400;
option domain-name "mydomain.com";
option domain-name-servers 192.168.1.1;
class "PXE" {
match if substring(option vendor-class-identifier, 0, 9) = "PXEClient";
option vendor-class-identifier "PXEClient";
vendor-option-space PXE;
option PXE.mtftp-ip 0.0.0.0;
next-server 192.168.2.1; #tftp server location
filename "pxelinux.0"; # standard TFTP
}
shared-network "mynetwork" {
subnet 192.168.2.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
option routers 192.168.2.1;
ddns-domainname = "mydomain.com";
pool {
range 192.168.2.10 192.168.2.20;
allow members of "PXE";
}
}
}
********************************************************************************
* /tftpboot/pxelinux.cfg/default ***********************************************
********************************************************************************
default linux
prompt 1
timeout 72
display help.msg
label linux
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 vga=788
label vgalo
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 vga=785
label vgahi
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 vga=791
label vga16
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 vga16
label text
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 text
label patch
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 patch vga=788
label expert
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 expert vga=788
label rescue
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz root=/dev/ram3 rescue rw
label oem
kernel vmlinuz
append ramdisk_size=32000 initrd=network.rdz automatic=method:cdrom root=/dev/ram3 rescue oem rw
********************************************************************************
* Usefull linkst ***************************************************************
********************************************************************************
http://syslinux.zytor.com/pxe.php
http://www.kano.org.uk/projects/pxe/
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