KVM Guest: Network dies not work

[robert]

Hi there,
I would like to set up an ubuntu KMV guest in an ubuntu host.

Unfortunately within the guest the network is not accesible. I can only 
ping localhost successfully.
The ip of the host is:176.9.142.21
The ip of the guest is: 176.9.163.129

One funy thing is: When I try to log int the guest from the host using 
the ip 176.9.163.129, I in fact log into the host.

Thanks for any help

robert

This is what I have done:

in the host I defined

<network>
     <name>Hetzner</name>
     <forward dev='eth0' mode='route'/>
     <bridge name='virbr2' stp='off' forwardDelay='0' />
     <ip address='176.9.163.129' netmask='255.255.255.224'/>
</network>

and activated it in virsh.

in the host: the setting in network/interfaces
-----------------------------------------------------------

### Hetzner Online AG - installimage
# Loopback device:
auto lo
iface lo inet loopback

# device: eth0
auto  eth0
iface eth0 inet static
   address   176.9.142.21
   broadcast 176.9.142.31
   netmask   255.255.255.255
   gateway   176.9.142.1
   pointopoint 176.9.142.1
   # default route to access subnet
   up route add -net 176.9.142.0 netmask 255.255.255.224 gw 176.9.142.1 eth0

auto virbr2
iface virbr2 inet static
   address 176.9.142.21
   netmask 255.255.255.255
   bridge_ports none
   bridge_stp off
   bridge_fd 0
   pre-up brctl addbr virbr2
   up ip route add 176.9.163.129/32 dev virbr2
   down ip route del 176.9.163.129/32 dev virbr2


in the quest
----------------
# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
   address 176.9.163.129
   broadcast 176.9.163.135
   netmask 255.255.255.255
   pointopoint 176.9.142.21
   gateway 176.9.142.21
   dns-nameservers 213.133.98.98 213.133.99.99



ifconfig on the host:
--------------------------
root at alice2 ~ # ifconfig
eth0      Link encap:Ethernet  HWaddr 54:04:a6:b2:0c:ff
           inet addr:176.9.142.21  Bcast:176.9.142.31 Mask:255.255.255.224
           inet6 addr: fe80::5604:a6ff:feb2:cff/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:2439457 errors:0 dropped:0 overruns:0 frame:0
           TX packets:1675965 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:1593344733 (1.5 GB)  TX bytes:1110458719 (1.1 GB)

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:65536  Metric:1
           RX packets:4393864 errors:0 dropped:0 overruns:0 frame:0
           TX packets:4393864 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:2003671511 (2.0 GB)  TX bytes:2003671511 (2.0 GB)

virbr0    Link encap:Ethernet  HWaddr 86:d1:ec:4b:9d:ce
           inet addr:192.168.122.1  Bcast:192.168.122.255 Mask:255.255.255.0
           UP BROADCAST MULTICAST  MTU:1500  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)

virbr2    Link encap:Ethernet  HWaddr 52:54:00:cc:fb:8b
           inet addr:176.9.163.129  Bcast:176.9.163.159 Mask:255.255.255.224
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:536 errors:0 dropped:0 overruns:0 frame:0
           TX packets:45919 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:19232 (19.2 KB)  TX bytes:1928598 (1.9 MB)

vnet0     Link encap:Ethernet  HWaddr fe:54:00:81:ae:41
           inet6 addr: fe80::fc54:ff:fe81:ae41/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:71 errors:0 dropped:0 overruns:0 frame:0
           TX packets:817 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:500
           RX bytes:3294 (3.2 KB)  TX bytes:34506 (34.5 KB)