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Start DHCPD with '-q venet0:0' or similar or put in 79.99.1.114 as a
dummy unauthoritative subnet that does not have any pools.<br>
<br>
--Blake<br>
<br>
-------- Original Message --------<br>
Subject: dhcp on p-t-p interface<br>
From: Anders Rosendal <a class="moz-txt-link-rfc2396E" href="mailto:anders@rosendal.nu"><anders@rosendal.nu></a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:dhcp-users@isc.org">dhcp-users@isc.org</a><br>
Date: Friday, September 19, 2008 3:41:35 PM<br>
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<p><font size="2">Hi<br>
I'm having one server at local LAN that I'm serving with IP's. I'm now
trying out a a virtual server from a hosting provider, and aiming to
use that as a redundant dhcp-server. When installing dhcpd on it I ran
into problems. The public network interface of the server is a p-t-p
one, with a broadcast set to 0.0.0.0.<br>
I guess that the hosting supplier is using XEN or similar to provide
the service.<br>
This is what I've got:<br>
<br>
A Ubuntu 8.04 LTS server with isc-dhcpd-V3.0.6.<br>
<br>
rosendal@hera:~$ cat /etc/network/interfaces<br>
# This configuration file is auto-generated.<br>
# WARNING: Do not edit this file, otherwise your changes will be lost.<br>
# Please edit template /etc/network/interfaces.template instead.<br>
<br>
<br>
# Auto generated interfaces<br>
auto lo<br>
iface lo inet loopback<br>
<br>
auto venet0<br>
iface venet0 inet static<br>
address 127.0.0.1<br>
netmask 255.255.255.255<br>
broadcast 0.0.0.0<br>
up route add -net 192.0.2.1 netmask 255.255.255.255 dev venet0<br>
up route add default gw 192.0.2.1<br>
<br>
iface venet0 inet6 static<br>
address ::1<br>
netmask 128<br>
<br>
auto venet0:0<br>
iface venet0:0 inet static<br>
address 79.99.1.114<br>
netmask 255.255.255.255<br>
broadcast 0.0.0.0<br>
<br>
rosendal@hera:~$ ifconfig -a<br>
lo Link encap:Local Loopback <br>
inet addr:127.0.0.1 Mask:255.0.0.0<br>
inet6 addr: ::1/128 Scope:Host<br>
UP LOOPBACK RUNNING MTU:16436 Metric:1<br>
RX packets:0 errors:0 dropped:0 overruns:0 frame:0<br>
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0<br>
collisions:0 txqueuelen:0<br>
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)<br>
<br>
venet0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 <br>
inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0
Mask:255.255.255.255<br>
inet6 addr: ::1/128 Scope:Host<br>
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1<br>
RX packets:452 errors:0 dropped:0 overruns:0 frame:0<br>
TX packets:339 errors:0 dropped:0 overruns:0 carrier:0<br>
collisions:0 txqueuelen:0<br>
RX bytes:49704 (48.5 KB) TX bytes:56924 (55.5 KB)<br>
<br>
venet0:0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 <br>
inet addr:79.99.1.114 P-t-P:79.99.1.114 Bcast:0.0.0.0
Mask:255.255.255.255<br>
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1<br>
<br>
rosendal@hera:~$<br>
<br>
The dhcpd.conf file is copied from the working server and I have added:<br>
<br>
subnet 79.99.1.114 netmask 255.255.255.255 {<br>
}<br>
<br>
<br>
but when restarting dhcpd I get the following message in dhcpd I get
the following message:<br>
<br>
Sep 19 22:30:04 hera dhcpd: No subnet declaration for venet0:0
(0.0.0.0).<br>
Sep 19 22:30:04 hera dhcpd: ** Ignoring requests on venet0:0. If this
is not what<br>
Sep 19 22:30:04 hera dhcpd: you want, please write a subnet
declaration<br>
Sep 19 22:30:04 hera dhcpd: in your dhcpd.conf file for the network
segment<br>
Sep 19 22:30:04 hera dhcpd: to which interface venet0:0 is attached.
**<br>
Sep 19 22:30:04 hera dhcpd:<br>
Sep 19 22:30:04 hera dhcpd:<br>
Sep 19 22:30:04 hera dhcpd: Not configured to listen on any interfaces!<br>
<br>
<br>
<br>
Does anyone has suggestion how I should configure to get the server to
listen to the venet0:0 interface?<br>
The router on my main network is configured to forward dhcp-requests to
my "redundant" server, so this is not a problem.<br>
<br>
<br>
Thanks in advance.<br>
<br>
Regards Anders R</font>
</p>
<br>
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