QEMU網路問題解決

解決之前網路guest連不到host問題,

可設定開機啟動以下指令：

ip addr add 10.222.112.1 dev br0

ip route add 10.222.112.0/24 dev br0

修改iptables:

iptables -t nat -A POSTROUTING -o br0 -s 10.222.112.0/24 -j MASQUERADE

iptables -I INPUT -i br0 -p icmp -s 10.222.112.0/255.255.255.0 -j ACCEPT

修改：

/etc/qemu-ifup

#!/bin/sh
bridge=br0ifconfig $1 0.0.0.0 promisc up
brctl addif $bridge $1

/etc/qemu-ifdown

#!/bin/sh
bridge=br0
brctl delif $bridge $1 || true
ifconfig $1 down

指令：

qemu-system-x86_64 --enable-kvm image_file -m 2048 -smp 2 -netdev tap,id=mynet0 -device virtio-net-pci,netdev=mynet0

在guest內：

 vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=52:54:00:12:34:56
IPADDR=10.222.112.2
GATEWAY=10.222.112.1
NETMASK=255.255.255.0
TYPE=Ethernet
UUID=3f979381-18b8-4a3e-8221-2f8379c8b79a
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none