dhcpd service keeps failing in CentOS 5.4

linux_newb · 01-21-2010, 10:16 AM

Hi guys,

I'm having some trouble with getting my DHCP service up and running on my server. Below is my /etc/dhcpd.conf file, which I believe is the right file necessary to get this service up and running correctly. Does anyone have idea what i can be doing wrong? When I do service dhcpd resstart it just show in red letter [FAILED] next to it.

Code:

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

subnet 10.2.3.1 netmask 255.0.0.0 {

# --- default gateway
	#option routers			         10.2.1.1;
	#option subnet-mask		255.0.0.0;

	#option nis-domain		"domain.org";
	#option domain-name		"domain.org";
	#option domain-name-servers	10.7.8.1;

	option time-offset		-18000;	# Eastern Standard Time
#	option ntp-servers		192.168.1.1;
#	option netbios-name-servers	192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
#	option netbios-node-type 2;

	range dynamic-bootp 10.2.3.2 10.2.3.254;
	default-lease-time 21600;
	max-lease-time 43200;

	# we want the nameserver to appear at a fixed address
#	host ns {
#		next-server marvin.redhat.com;
#		hardware ethernet 12:34:56:78:AB:CD;
#		fixed-address 207.175.42.254;
	}
}

ncsuapex · 01-21-2010, 10:40 AM

I believe your line:

subnet 10.2.3.1 netmask 255.0.0.0 {

should be:

subnet 10.2.3.0 netmask 255.0.0.0 {

Assuming your netmask is correct for your network

And I believe you need to uncomment this line:

#option routers 10.2.1.1;

Making sure 10.2.1.1 is your router... Which should be something like 10.2.3.1 maybe.

And you probably need to uncomment this line:

#option subnet-mask 255.0.0.0;

Also you need to check out /var/log/messages. But since you didn't provide anything about your network its going to be hard to help you.

linux_newb · 01-21-2010, 10:52 AM

Quote:

Originally Posted by ncsuapex

I believe your line:

subnet 10.2.3.1 netmask 255.0.0.0 {

should be:

subnet 10.2.3.0 netmask 255.0.0.0 {

Assuming your netmask is correct for your network

And I believe you need to uncomment this line:

#option routers 10.2.1.1;

Making sure 10.2.1.1 is your router... Which should be something like 10.2.3.1 maybe.

And you probably need to uncomment this line:

#option subnet-mask 255.0.0.0;

Also you need to check out /var/log/messages. But since you didn't provide anything about your network its going to be hard to help you.

Thank you so much for your quick response. I commented that line with the option router out because I do not have a router. I only have a dummy switch. Will that make any type of difference? I tried the recommended changes and my dhcpd service still fails.

A copy of my /var/log/messages
[code]
Jan 21 06:59:34 CenOServer dhcpd: /etc/dhcpd.conf line 4: subnet 10.7.8.0 netmask 255.0.0.0: bad subnet number/mask combination.
Jan 21 06:59:34 CenOServer dhcpd: subnet 10.2.1.0 netmask 255.0.0.0
Jan 21 06:59:34 CenOServer dhcpd: ^
Jan 21 06:59:34 CenOServer dhcpd: /etc/dhcpd.conf line 30: expecting a declaration
Jan 21 06:59:34 CenOServer dhcpd: }
Jan 21 06:59:34 CenOServer dhcpd: ^
Jan 21 06:59:34 CenOServer dhcpd: Configuration file errors encountered -- exiting
Jan 21 06:59:34 CenOServer dhcpd:
Jan 21 06:59:34 CenOServer dhcpd: If you did not get this software from ftp.isc.org, please
Jan 21 06:59:34 CenOServer dhcpd: get the latest from ftp.isc.org and install that before
Jan 21 06:59:34 CenOServer dhcpd: requesting help.
[code]