DHCP Configuration Error Ubuntu

ash321 · 07-07-2010, 06:35 PM

Hello,

I am new to Linux and am try to set up this server but i keep getting an error when restarting the server. I found the syslog file and it is telling me

Code:

Jul  7 19:25:54 bobby-desktop dhcpd: No subnet declaration for eth0 (169.254.5.172).
Jul  7 19:25:54 bobby-desktop dhcpd: ** Ignoring requests on eth0.  If this is not what
Jul  7 19:25:54 bobby-desktop dhcpd:    you want, please write a subnet declaration
Jul  7 19:25:54 bobby-desktop dhcpd:    in your dhcpd.conf file for the network segment
Jul  7 19:25:54 bobby-desktop dhcpd:    to which interface eth0 is attached. **
Jul  7 19:25:54 bobby-desktop dhcpd: 
Jul  7 19:25:54 bobby-desktop dhcpd: 
Jul  7 19:25:54 bobby-desktop dhcpd: Not configured to listen on any interfaces!

My config file is

Code:

#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
    range 192.168.0.20 192.168.0.250;
    option domain-name "example.com";
    option domain-name-servers 192.168.0.1;
    option broadcast-address 192.168.0.255;
    option routers 192.168.0.1;
#    next-server 192.168.0.1;
#    get-lease-hostnames true;
    option subnet-mask 255.255.255.0;
    option root-path "/opt/ltsp/i386";
    if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
        filename "/ltsp/i386/pxelinux.0";
    } else {
        filename "/ltsp/i386/nbi.img";
    }
}

if i change subnet 192.168.0.0 netmask 255.255.255.0 to subnet 169.254.5.17 netmask 255.255.255.0 then i get a different error about bad combinations. I am not quite sure where to go next any help would be great appreciated. Here is the tutorial i was trying to follow http://www.ubuntugeek.com/how-to-ins...tu-server.html.

Originally i was in the correct file until reading the heading about the ltsp file that would be used instead so i switched to editing that file instead

kapsikum · 07-07-2010, 11:04 PM

It Appears that your eth0 is having the ip 169.254.5.172 then you have to specify the subnet in that range i guess i.e
169.254.5.0/24. If these changes do not straddles with your strategy may be this change would help:

#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 169.254.5.0 netmask 255.255.255.0 {
range 169.254.5.2 169.254.5.171;
option domain-name "example.com";
option domain-name-servers 192.168.0.1;
option broadcast-address 192.168.0.255;
option routers 192.168.0.1; # Caution: you have to see this whats now going to be your default route
# next-server 192.168.0.1;
# get-lease-hostnames true;
option subnet-mask 255.255.255.0;
option root-path "/opt/ltsp/i386";
if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
filename "/ltsp/i386/pxelinux.0";
} else {
filename "/ltsp/i386/nbi.img";
}
}

try starting your dhcpd on eth0 with this file again and post the error, if any

ash321 · 07-08-2010, 10:13 AM

Thank you very much! I got the dhcp server to work now. Then i plugged in a thin client and the first time it got to loading images then failed. But now it says that there is an ARP timeout and then the PXE boot fails. Any chance you can help me out again? If not ill mark it as solved and try to figure out the thanked thing on the left side. I was searching google for solutions and found this http://ubuntuforums.org/showthread.php?t=1441802 but it didnt fixed the error. Like i said im new to both networking and linux

Current config file

Code:

#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 169.254.5.0 netmask 255.255.255.0 {
range 169.254.5.2 169.254.5.171;
option domain-name "example.com";
option domain-name-servers 192.168.0.1; 
option broadcast-address 192.168.0.255;
option routers 192.168.0.1; # Caution: you have to see this whats now going to be your default route
next-server 169.254.5.172;
allow booting;
allow bootp;
# get-lease-hostnames true;
option subnet-mask 255.255.255.0;
option root-path "/opt/ltsp/i386";
if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
filename "/ltsp/i386/pxelinux.0";
} else {
filename "pxelinux.0";
}
}