actually i wanted to design cluster, so for that i am trying to set dhcp for network booot option for remaining nodes(pxe). what every i did it was not work instead it is showing some error..

below one show this how i configured as which was posted one of this forum ..


dhcpd.conf

ddns-update-style interim;
ignore client-updates;


option domain-name "qchipware";
option domain-name-servers 190.160.10.10;
option subnet-mask 255.255.255.0;



subnet 190.160.10.0 netmask 255.255.255.0 {
authoritative;
range 190.160.10.11 190.160.10.255;
option routers 190.160.10.1;
allow unknown-clients;
allow booting;
allow bootp;
nex-server 190.160.10.10;
filename "pxelinux.0";

}

when i try to start dhcpd i got error: dhcpd failed. The error was: Starting dhcpd: [FAILED]


please any body can help me ...

How about you look in the logs in the hope they tell you WHY it fails?

Or if you don't use service dhcpd start but try to start the daemon
manually - do you get any debug output?

i think your range ip. try rescope yr range not till 255 broadcast ip

# Sample configuration file for ISC dhcpd

DHCPDARGS=eth0;

default-lease-time 21600;
max-lease-time 21600;
ddns-update-style ad-hoc;
authoritative;


subnet 172.20.70.0 netmask 255.255.255.0 {
range 172.20.70.4 172.20.70.100;

option broadcast-address 172.20.70.255;
option routers 172.20.70.254;
option domain-name-servers 172.20.70.3;
}



subnet 172.20.80.0 netmask 255.255.255.0 {
range dynamic-bootp 172.20.80.4 172.20.80.100;
option broadcast-address 172.20.80.255;
option routers 172.20.70.3;
option domain-name-servers 172.20.70.3;
}

thank you for ur response
i have tried it but no use please can anybody tell me how to setup parallel computing with 4 computer one is master and other three are client diskless and i have router connected in between to communicate with each other. please anybody help me to set it up for this given machine i have the range also ....
thank you