From owner-freebsd-emulation@FreeBSD.ORG  Mon Jun 18 13:48:19 2007
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Date: Mon, 18 Jun 2007 15:17:48 +0200 (CEST)
From: "P.U.Kruppa" <ulrich@pukruppa.net>
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Subject: Virtual network with qemu
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Hi,

I posted this question a while ago to freebsd-questions - without 
any success. I hope this list is more suitable.

For some network experiments I would like to set up two virtual 
machines with qemu inside my freebsd box. I tried to draw the 
situation:


                       | DSL Bridge to Internet|
                        -----------------------
                                  |
___________     _________________|_________________
"Real" LAN |---|          192.168.10.1             |
-----------    |           FreeBSD 6.2             |
                |        |                 |        |
                |  ______|______    _______|______  |
                | | 192.168.10.5|  | 192.168.10.6 | |
                | |   Win2k on  |  |  FreeBSD on  | |
                | |     Qemu    |  |     Qemu     | |
                |  -------------    --------------  |
                 -----------------------------------

My real LAN uses 192.168.10.1 as gateway to the Internet.

For now I can only connect one of the two virtual boxes to my 
real network, but not both. This is how far I get:

# kldload aio kqemu if_tap bridge
# sysctl net.link.ether.bridge_cfg=rl0,tap0
# sysctl net.link.ether.bridge.enable=1
# qemu-system-x86_64 -hda Win2k.img -m 512 -localtime \
   -net tap -net nic

When now I try to connect the second virtual box, it will "steal" 
the first box's network connection.

Ah, yes: This is my /etc/qemu-ifup
         #!/bin/sh
         ifconfig ${1} 0.0.0.0

Thanks for your help,

Uli.



Peter Ulrich Kruppa
Wuppertal
Germany