Hi,
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:
[root@localhost ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:23:7D:A2:2B:D0
inet addr:10.1.0.15 Bcast:10.1.3.255 Mask:255.255.252.0
inet6 addr: fe80::223:7dff:fea2:2bd0/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:114 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1650 (1.6 KiB) TX bytes:7404 (7.2 KiB)
Interrupt:185 Memory:f8000000-f8012800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2385 errors:0 dropped:0 overruns:0 frame:0
TX packets:2385 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2928790 (2.7 MiB) TX bytes:2928790 (2.7 MiB)
The interface has a fixed IP setup.
My dhcp.conf file looks like this:
Code:
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.sample
# to run in debug mode use the -f parameter /usr/sbin/dhcpd -d -f
# see /etc/sysconfig/dhcpd to see at what interface DHCP server is bound
#database with active lease is located at /var/lib/dhcpd/dhcpd.leases
#after a change the DHCP server needs a restart: 'prompt# service dhcpd restart'
ddns-update-style interim;
ignore client-updates;
#global settings
shared-network name {
option domain-name "company.voip.nl";
# option ntp-servers --need to work out proper context later -- "0.nl.pool.ntp.org" 1.nl.pool.ntp.org 2.nl.pool.ntp.org 3.nl.pool.ntp.org;
option time-offset 7200; #Central European Time +0200 UTC
#RNL6677 = colocation
subnet 10.1.0.0 netmask 255.255.252.0 {
option routers 10.1.0.1;
option subnet-mask 255.255.252.0;
range dynamic-bootp 10.1.0.32 10.1.0.35; #4 hosts for guest on the VOIP network and testing
default-lease-time 21600; #6 hours
max-lease-time 43200; #12 hours
}
# next part is not active yet
#RNL1519 = zwolle
# subnet 10.12.0.0 netmask 255.255.252.0 {
# option routers 10.12.0.1;
# option subnet-mask 255.255.252.0;
# range dynamic-bootp 10.12.0.32 10.12.0.160; #128 hosts
# default-lease-time 21600; #6 hours
# max-lease-time 43200; #12 hours
# }
}
/etc/sysconfig/dhcpd looks like:
Code:
# Command line options here
# blank foor all
DHCPDARGS=ETH0
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:
Jun 7 10:07:26 localhost dhcpd: Internet Systems Consortium DHCP Server V3.0.5-RedHat
Jun 7 10:07:26 localhost dhcpd: Copyright 2004-2006 Internet Systems Consortium.
Jun 7 10:07:26 localhost dhcpd: All rights reserved.
Jun 7 10:07:26 localhost dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Jun 7 10:07:26 localhost dhcpd: Wrote 1 leases to leases file.
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: No subnet declaration for ETH0 (0.0.0.0).
Jun 7 10:07:26 localhost dhcpd: ** Ignoring requests on ETH0. If this is not what
Jun 7 10:07:26 localhost dhcpd: you want, please write a subnet declaration
Jun 7 10:07:26 localhost dhcpd: in your dhcpd.conf file for the network segment
Jun 7 10:07:26 localhost dhcpd: to which interface ETH0 is attached. **
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: Not configured to listen on any interfaces!
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: If you did not get this software from ftp.isc.org, please
Jun 7 10:07:26 localhost dhcpd: get the latest from ftp.isc.org and install that before
Jun 7 10:07:26 localhost dhcpd: requesting help.
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: If you did get this software from ftp.isc.org and have not
Jun 7 10:07:26 localhost dhcpd: yet read the README, please read it before requesting help.
Jun 7 10:07:26 localhost dhcpd: If you intend to request help from the dhcp-server@isc.org
Jun 7 10:07:26 localhost dhcpd: mailing list, please read the section on the README about
Jun 7 10:07:26 localhost dhcpd: submitting bug reports and requests for help.
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: Please do not under any circumstances send requests for
Jun 7 10:07:26 localhost dhcpd: help directly to the authors of this software - please
Jun 7 10:07:26 localhost dhcpd: send them to the appropriate mailing list as described in
Jun 7 10:07:26 localhost dhcpd: the README file.
Jun 7 10:07:26 localhost dhcpd:
Jun 7 10:07:26 localhost dhcpd: exiting.
But when I start the DHCPD on the comamnd prompt in debug mode it looks as follows:
Code:
[root@localhost ~]# /usr/sbin/dhcpd -d -f
Internet Systems Consortium DHCP Server V3.0.5-RedHat
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Wrote 1 leases to leases file.
Listening on LPF/eth0/00:23:7d:a2:2b:d0/name
Sending on LPF/eth0/00:23:7d:a2:2b:d0/name
Sending on Socket/fallback/fallback-net
and /var/log/messages shows:
Code:
Jun 7 10:09:02 localhost dhcpd: Internet Systems Consortium DHCP Server V3.0.5-RedHat
Jun 7 10:09:02 localhost dhcpd: Copyright 2004-2006 Internet Systems Consortium.
Jun 7 10:09:02 localhost dhcpd: All rights reserved.
Jun 7 10:09:02 localhost dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Jun 7 10:09:02 localhost dhcpd: Wrote 1 leases to leases file.
Jun 7 10:09:02 localhost dhcpd: Listening on LPF/eth0/00:23:7d:a2:2b:d0/name
Jun 7 10:09:02 localhost dhcpd: Sending on LPF/eth0/00:23:7d:a2:2b:d0/name
Jun 7 10:09:02 localhost dhcpd: Sending on Socket/fallback/fallback-net
What am I doing wrong, what am I missing?
Why does the system ask a declaration for eth0 0.0.0.0?
Thanks Jan-Willem.
