Yrurtj

I am trying to set up a pxe boot server on a Debian 6.0.3 Squeeze machine that gives images of PLoP Linux. I was following a tutorial from http://www.plop.at/en/ploplinux/networkboot-linux.html#pxel12 .

When I try to start dhcpd (from package dhcp3-server), I get the following:

No subnet declaration for eth0 (10.0.0.0).

**Ignoring requests on eth0. If this is not what

  you want, please write a subnet delclaration

  in your dhcpd.conf file for the network segment 

  to which interface eth0 is attached. **







Not configured to listen on any interfaces!

My /etc/dhcpd.conf is identical to that in the tutorial save for a few changes:

host testpc {

        hardware ethernet 00:0C:6E:A6:1A:E6;

        fixed-address 10.0.0.250;

}

is instead

host tablet {

        hardware ethernet 00:02:3F:FB:E2:6F;

        fixed-address 10.0.0.249;

}

My /etc/network/interfaces is:

# The loopback network interface

auto lo

iface lo inet loopback



# The primary network interface

allow-hotplug eth0

iface eth0 inet static

        address 10.0.0.0

        netmask 255.255.255.0

And this is my /etc/default/isc-dhcp-server:

# Defaults for dhcp initscript

# sourced by /etc/init.d/dhcp

# installed at /etc/default/isc-dhcp-server by the maintainer scripts



#

# This is a POSIX shell fragment

#



# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?

#       Separate multiple interfaces with spaces, e.g. "eth0 eth1".

INTERFACES="eth0"

which I copied to /etc/default/dhcp3-server as well, unsure which it would check.

I also tried setting the ip in /etc/network/interfaces as 10.0.0.1 and 10.0.0.2, but it produced the same result.

Since dhcpd has to hand out IP addresses to clients, it needs to know the range of addresses that it is responsible for. The subnet declaration gives dhcpd that information and more. Assuming you're using 10.0.0/24, the following should get you started and past the error message, but you really need to get into the documentation to go further. Add this to your dhcpd.conf:

subnet 10.0.0.0 netmask 255.255.255.0 { 

   authoritative; 

   range 10.0.0.1 10.0.0.254; 

   default-lease-time 3600; 

   max-lease-time 3600; 

   option subnet-mask 255.255.255.0; 

   option broadcast-address 10.0.0.255; 

   option routers 10.0.0.0; 

   option domain-name-servers 8.8.8.8; 

   option domain-name "example.com"; 

} 

The IP addresses I plugged in above are guesses. You've got to set these properly for your setup.

The problem is that 10.0.0.0 is not a valid IPv4 address. The first address in the subnet (the address with all zeros for the host portion) is the subnet identifier and therefore is not a valid host address. Try 10.0.0.1. You should also avoid the last address in a subnet, as that's the IP broadcast address.

Decimal: 

  Address:     10   .0  .0  .0

  Subnet Mask: 255.255.255.255

Hex:     

  Address:     0A 00 00 00 

  Subnet Mask: FF FF FF 00

  Network:     ^^ ^^ ^^

  Host:                 ^^

  Smallest Addr:        01 (.1)

  Largest Addr:         FE (.254)

  Broadcast:            FF (.255)

I ended up just purging dhcp3-server and using dnsmasq instead. I went through the configuration file for it and was able to use the examples it had commented to configure my server how I needed. dnsmasq also has a built in tftp server that I used for the PXE boot.

Check with

ifconfig eth0

If your interface eth0 has the correct ipv4

(it seems you set it to address 10.0.0.0 which would be invalid anyway)

if it has an IP in the wrong range, give it a new adress for example with:

ifconfig eth0 10.0.0.1

then try restarting your dhcp server

Removing dnsmasq solved my problem

sudo apt-get -y remove dnsmasq