When you run virtual machines, the most convenient network setup is having a bridge between the virtual machine and your normal ethernet network. In Debian, I use the following config in /etc/network/interfaces to have such a bridge:
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
# The loopback interface
auto lo
iface lo inet loopback
# The first network card - this entry was created during the Debian installation
# (network, broadcast and gateway are optional)
auto eth1
iface eth1 inet manual
auto br0
iface br0 inet static
address 192.168.1.101
network 192.168.1.0
broadcast 192.168.1.255
netmask 255.255.255.0
gateway 192.168.1.100
bridge_ports eth1
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
In this setup, the br0 gets the IP address that eth1 had before. Intuitively, I would have created a bridge which would connect eth1 and new interfaces, but when I did that, I could not get it to work.
I then used a command similar to this to install the virtual machine:
virt-install --connect qemu:///system -n vm10 -r 512 --vcpus=2 -f ~/vm10.qcow2 -s 12 -c ~/debian-500-amd64-netinst.iso --vnc --noautoconsole --os linux --os-variant debianLenny --accelerate --network=bridge:br0 --hvm
You can adjust where necessary. What’s important, is the –network=bridge:br0. This makes sure that kvm is run with:
kvm [more options] -net nic,macaddr=54:52:00:52:1c:7c,vlan=0,model=virtio -net tap,fd=7,script=,vlan=0,ifname=vnet0
The network setup looks like:
br0 Link encap:Ethernet HWaddr 00:15:17:23:83:67
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::215:17ff:fe23:8367/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1866633 errors:0 dropped:0 overruns:0 frame:0
TX packets:1678602 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:892540330 (851.1 MiB) TX bytes:971936093 (926.9 MiB)
eth1 Link encap:Ethernet HWaddr 00:15:17:23:83:67
inet6 addr: fe80::215:17ff:fe23:8367/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:13371212 errors:0 dropped:0 overruns:0 frame:0
TX packets:12703312 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:4234365756 (3.9 GiB) TX bytes:201738186 (192.3 MiB)
Memory:88180000-881a0000
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:2672817 errors:0 dropped:0 overruns:0 frame:0
TX packets:2672817 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:493599313 (470.7 MiB) TX bytes:493599313 (470.7 MiB)
vnet0 Link encap:Ethernet HWaddr 00:ff:2d:a0:76:34
inet6 addr: fe80::2ff:2dff:fea0:7634/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:159072 errors:0 dropped:0 overruns:0 frame:0
TX packets:310906 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:10860687 (10.3 MiB) TX bytes:465526222 (443.9 MiB)
source for all this.
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