From mboxrd@z Thu Jan  1 00:00:00 1970
From: list user <nhgxfjijdrcd@mailinator.com>
Date: Fri, 03 Feb 2006 18:48:22 +0000
Subject: Re: [lartc] Virtual Interface
Message-Id: <43E3A576.2080604@mailinator.com>
List-Id: <lartc.vger.kernel.org>
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To: lartc@vger.kernel.org

Hi Roger,

[big snip: lost o.p.]

There are a couple of different approaches you might try.  One is to use
uml-utilities' tunctl to create an ethernet tap.   Another is to use the
dummy interface.  With either method you can bridge, route, configure as
you would a physical device using ifconfig and/or ip.

The following methods work for me.  I use Fedora Core 4.  Its network
setup methods are in /etc/sysconfig/network-scripts.

cd /etc/sysconfig/network-scripts
ln -s ifup-eth ifup-tap
ln -s ifdown-eth ifdown-tap
echo 'ip link show tap0 | grep "tap0" 2>&1 >/dev/null ||  tunctl -t tap0
DEVICE=3Dtap0
TYPE=3Dethernet
ONBOOT=3Dyes
BOOTPROTO=3Dstatic
MACADDRZ:5a:5a:5a:5a:5a
NETWORK=192.168.0.0
IPADDR=192.168.0.1
BROADCAST=192.168.0.255
NETMASK%5.255.255.0' > ifcfg-tap0
ifup tap0

ln -s ifup-eth0 ifup-dummy
ln -s ifdown-eth ifdown-dummy
echo 'ip link show dummy0 | grep "dummy0" 2>&1 >/dev/null || {
  ip link set dummy0 up
  ip link set dummy0 arp on
  ip link set dummy0 multicast on
}
DEVICE=3Ddummy0
TYPE=3Dethernet
ONBOOT=3Dyes
BOOTPROTO=3Dstatic
MACADDR=A4:a5:a5:a5:a5:a5
NETWORK=192.168.0.0
IPADDR=192.168.0.2
BROADCAST=192.168.0.255
NETMASK%5.255.255.0' > ifcfg-dummy0
ifup dummy0

If all went well there should now be two new virtual ethernet devices,
tap0 and dummy0.

Hope this information is useful to you,
Mike Wright :m)

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