Networking :: DHCPD Service Keeps Failing In CentOS 5.4

Jan 21, 2010

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. When I do service dhcpd restart 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-mask255.0.0.0;

#option nis-domain"domain.org";
#option domain-name"domain.org";
#option domain-name-servers10.7.8.1;

option time-offset-18000;# Eastern Standard Time
#option ntp-servers192.168.1.1;
#option netbios-name-servers192.168.1.1;
# --- 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; } }

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Networking :: Network Service Failing To Start

Mar 5, 2011

I have recently installed CentOS onto an old machine to get it up and running as a basic web/mail server. Originally the Network Interface worked ok, however I have been editing /etc/sysconfig/network-scripts/ifcfg-eth0 to try and set the IP address to be static.Now when I run the 'service network restart' command it won't bring the eth0 interface up and comes up with the following errors;

ifcfg-eth0 Line 3 DEVICE: command not found
missing config file ifcfg-ifcfg-eth0

It doesn't seem to like any of the command words, even though most of these were in the original file that worked and the ones I added to do static I have commented out.

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Jan 19, 2010

I just installed F12 from scratch and I'm facing a curious situation with dhpd. The service is enabled, but It fails to start on boot. I see the following error on /var/log/messages:

Jan 18 17:15:28 neo dhcpd: No subnet declaration for eth1 (no IPv4 addresses).
Jan 18 17:15:28 neo dhcpd: ** Ignoring requests on eth1. If this is not what
Jan 18 17:15:28 neo dhcpd: you want, please write a subnet declaration
Jan 18 17:15:28 neo dhcpd: in your dhcpd.conf file for the network segment
Jan 18 17:15:28 neo dhcpd: to which interface eth1 is attached. **

However service dhcpd start, works just fine when I login, after the system boots:

Jan 18 17:26:49 neo dhcpd: Internet Systems Consortium DHCP Server 4.1.0p1
Jan 18 17:26:49 neo dhcpd: Copyright 2004-2009 Internet Systems Consortium.
Jan 18 17:26:49 neo dhcpd: All rights reserved.
Jan 18 17:26:49 neo dhcpd: For info, please visit [URL]
Jan 18 17:26:49 neo dhcpd: WARNING: Host declarations are global. They are not limited to the scope you declared them in.
Jan 18 17:26:49 neo dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
Jan 18 17:26:49 neo dhcpd: Wrote 0 deleted host decls to leases file.
Jan 18 17:26:49 neo dhcpd: Wrote 0 new dynamic host decls to leases file.
Jan 18 17:26:49 neo dhcpd: Wrote 5 leases to leases file.
Jan 18 17:26:49 neo dhcpd: Listening on LPF/eth1/00:30:48:80:2e:7e/192.168.1.0/24
Jan 18 17:26:49 neo dhcpd: Sending on LPF/eth1/00:30:48:80:2e:7e/192.168.1.0/24
Jan 18 17:26:49 neo dhcpd: Sending on Socket/fallback/fallback-net

So it can't be a problem with my dhcpd.conf file.

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I am a Linux newbie using Oracle Enterprise Linux version 4 update 7 (its almost similar to Redhat Linux). While going through tutorials, I tried to configure the DCHP service and set it to start after every boot via the command

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General :: DHCPD Service Fail To Start

Mar 14, 2010

My dhcpd service get failed every time when I try to start it
1) Actually I have a lan connection which has a static ip network 192.168.10.0/24 and the pc to which is using the dhcpd has a ip address 192.168.10.1/24
2) And I have a internet connection wirelessly which has a network 192.168.2.0/24
Now I want to problem ip address in the network of 192.168.10.0/24

Here below is the configuration file of dhcp server:
# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#
# option definitions common to all supported networks...
option domain-name "example.org";
option domain-name-servers ns1.example.org, ns2.example.org;
# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none; .....

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I have setup a CentOS 5.5 server as a DHCP server. That will be it's only task in a Cisco callmanger VoIP environment The DHCP server that comes with CentOS 5.5 is from ISC V3.0.5 -redhat.

The server (HP DL360) has two physical NIC's of which only NIC1 is used (ETH0)

ifconfig shows:

Code:

The interface has a fixed IP setup.

My dhcp.conf file looks like this:

Code:

When I start (try to) dhcpd via the service interface or via the prompt as

Code: service dhcpd start

I get an [FAILED] message and the following is in /var/log/messages

Code:

But when I start the DHCPD on the comamnd prompt in debug mode it looks as follows:

Code:

and /var/log/messages shows:

Code:

Why does the system ask a declaration for eth0 0.0.0.0?

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I might be barking up the wrong tree here, but the only significant difference on these machines to others we have deployed is the Virtual PC instance. The machines have dual ethernet ports, with one assigned to the virtual PC. When the network failure occurs, it does not effect the virtual machine, which continues along merrily.

My expert colleague does not think so, but can anyone think of any way that our configuration could be causing the problem? If not, does anyone have any ideas on what the problem could be, or where I would start looking for information on the machine to debug the issue?

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#> ...
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EDIT: one solution that worked was to use ln -s /var/run/dhcp3-server/dhcpd.pid /var/run/dhcpd.pid dhcpd3 -cf /etc/dhcp3/dhcpd.conf at0

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Setting chains to policy ACCEPT: mangle filter nat [OK]
Unloading iptables modules: [OK]
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Error occurred at line: 18
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Code:
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[code].....

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