Re: [Qemu-devel] Assigning Real Network IP Address to Guest OS

[Laurent Vivier]

Le mardi 24 juin 2008 à 14:12 +0300, Volkan YAZICI a écrit :
> Hi,
> 
> Finally I managed to install Windows Server 2003 on a Debian
> GNU/Linux. Just with below configurations, network works without a touch
> in the guest OS.
> 
>   host> cat /etc/network/interfaces
>   # The loopback network interface
>   auto lo
>   iface lo inet loopback
>   
>   # The bridge network interface(s)
>   auto br0
>   iface br0 inet static
>           address 192.168.1.10
>           network 192.168.1.0
>           netmask 255.255.255.0
>           broadcast 192.168.1.255
>           gateway 192.168.1.1
>           bridge_ports eth0
>           bridge_fd 9
>           bridge_hello 2
>           bridge_maxage 12
>           bridge_stp off
> 
>   host>
>   br0       Link encap:Ethernet  HWaddr 00:1A:64:C1:94:3C
>             inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
>             inet6 addr: fe80::21a:64ff:fec1:943c/64 Scope:Link
>             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>             RX packets:1376286 errors:0 dropped:0 overruns:0 frame:0
>             TX packets:689106 errors:0 dropped:0 overruns:0 carrier:0
>             collisions:0 txqueuelen:0
>             RX bytes:83136118 (79.2 MiB)  TX bytes:864192345 (824.1 MiB)
>   
>   eth0      Link encap:Ethernet  HWaddr 00:1A:64:C1:94:3C
>             inet6 addr: fe80::21a:64ff:fec1:943c/64 Scope:Link
>             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>             RX packets:1686146 errors:0 dropped:0 overruns:0 frame:0
>             TX packets:1074092 errors:0 dropped:0 overruns:0 carrier:0
>             collisions:0 txqueuelen:1000
>             RX bytes:169127408 (161.2 MiB)  TX bytes:890492221 (849.2 MiB)
>             Interrupt:106 Memory:ce000000-ce011100
>   
>   eth1      Link encap:Ethernet  HWaddr 00:1A:64:C1:94:3E
>             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:1000
>             RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>             Interrupt:169 Memory:ca000000-ca011100
> 
>   guest> ipconfig
>   ...
>   Connection-specific DNS Suffix . :
>   IP Address ..................... : 10.0.2.15
>   Subnet Mask .................... : 255.255.255.0
>   Default Gateway ................ : 10.0.2.2
>   ...
> 
> I can make any sort of network operation on the guest OS. But what I
> really want to do is to assign a static IP to the guest OS in the
> 192.168.1.0/24 network, to be able to access to guest OS through
> machines in the same network. For this purpose, what kind of
> configuration should I follow? I such an adjustment possible via
> brdiging configuration? If not, I have a second NIC in the host OS
> (eth1), can I use that interface for that?
> 

I use this kind of configuration on a debian etch (host) with winxp
(guest).

on your host, you must have an /etc/qemu-ifup like this:

#!/bin/sh
sudo /sbin/ifconfig $1 0.0.0.0 promisc up
sudo /usr/sbin/brctl addif br0 $1

And in your guest configure it using a valid IP address for your host
network (I use DHCP), something like 192.168.1.11. You must also
configure guest route to use real gateway.

then remember to start qemu with "-net nic -net tap".

> I couldn't find any solutions on the qemu wiki and google. Any kind of
> help will be appreciated. (Documentation pointers are welcome as well.)

Regards,
Laurent
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