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:: setup qemu bridged networking on linux ubuntu

:: setup qemu bridged network
+ make / setup bridge on interface
$ sudo vi /etc/network/interfaces
# setup like :
auto lo
iface lo inet loopback

auto br0
iface br0 inet static
   address 10.100.100.81
   netmask 255.255.255.0
   network 10.100.100.0
   broadcast 10.100.100.255
   gateway 10.100.100.1
   bridge_ports eth0
   bridge_fd 9
   bridge_hello 2
   bridge_maxage 12
   bridge_stp off

+ restarting network interfaces
$ sudo /etc/init.d/networking restart

:: starting qemu
add network options:
-net nic,vlan=0 -net tap,vlan=0,ifname=tap0,script=/etc/qemu-ifup
ex:
$ sudo qemu -cdrom install-x86-minimal-20110111.iso -hda gentoo -net nic,vlan=0 -net tap,vlan=0,ifname=tap0,script=/etc/qemu-ifup

:: link
+ googlelinux
+ iank
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