dhcp on p-t-p interface

[Anders Rosendal]

Hi
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.
I guess that the hosting supplier is using XEN or similar to provide the service. 
This is what I've got:

A Ubuntu 8.04 LTS server with isc-dhcpd-V3.0.6.

rosendal at hera:~$ cat /etc/network/interfaces 
# This configuration file is auto-generated.
# WARNING: Do not edit this file, otherwise your changes will be lost.
# Please edit template /etc/network/interfaces.template instead.


# Auto generated interfaces
auto lo
iface lo inet loopback

auto venet0
iface venet0 inet static
	address 127.0.0.1
	netmask 255.255.255.255
	broadcast 0.0.0.0
	up route add -net 192.0.2.1 netmask 255.255.255.255 dev venet0
	up route add default gw 192.0.2.1

iface venet0 inet6 static
	address ::1
	netmask 128

auto venet0:0
iface venet0:0 inet static
	address 79.99.1.114
	netmask 255.255.255.255
	broadcast 0.0.0.0

rosendal at hera:~$ ifconfig -a
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:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:127.0.0.1  P-t-P:127.0.0.1  Bcast:0.0.0.0  Mask:255.255.255.255
          inet6 addr: ::1/128 Scope:Host
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:452 errors:0 dropped:0 overruns:0 frame:0
          TX packets:339 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:49704 (48.5 KB)  TX bytes:56924 (55.5 KB)

venet0:0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:79.99.1.114  P-t-P:79.99.1.114  Bcast:0.0.0.0  Mask:255.255.255.255
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1

rosendal at hera:~$

The dhcpd.conf file is copied from the working server and I have added:

subnet 79.99.1.114 netmask 255.255.255.255 {
}


but when restarting dhcpd I get the following message in dhcpd I get the following message:

Sep 19 22:30:04 hera dhcpd: No subnet declaration for venet0:0 (0.0.0.0).
Sep 19 22:30:04 hera dhcpd: ** Ignoring requests on venet0:0.  If this is not what
Sep 19 22:30:04 hera dhcpd:    you want, please write a subnet declaration
Sep 19 22:30:04 hera dhcpd:    in your dhcpd.conf file for the network segment
Sep 19 22:30:04 hera dhcpd:    to which interface venet0:0 is attached. **
Sep 19 22:30:04 hera dhcpd: 
Sep 19 22:30:04 hera dhcpd: 
Sep 19 22:30:04 hera dhcpd: Not configured to listen on any interfaces!



Does anyone has suggestion how I should configure to get the server to listen to the venet0:0 interface?
The router on my main network is configured to forward dhcp-requests to my "redundant" server, so this is not a problem.


Thanks in advance.

Regards Anders R

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