在Ubuntu环境中qemu-kvm网桥的配置
auto lo iface lo inet loopback#auto eth0
#iface eth0 inet dhcp
auto br0
iface br0 inet dhcp
bridge_portsall # eth0 tap0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
auto tap0
iface tap0 inet manual
pre-up tunctl -t tap0 -u username #将username修改为自己的用户名即可
pre-up ifconfig tap0 0.0.0.0 promisc up
post-up brctl addifbr0 tap0
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