2，再看一下虚拟机配置文件里面的网络设置
#cat /etc/libvirt/qemu/ubuntu10.04.xml
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3，改完之后要更新一下配置文件
# virsh define ubuntu10.04.xml
定义域 ubuntu10.04（从 ubuntu10.04.xml）
#然后就可以virsh start ubuntu10.04了，不过现在物理网卡这块还没有改好
4，物理网卡可以手动更改，不过现在有现成的工具包，可以用这个更改
#wget
http://www.convirture.com/downloads/convirture-tools/2.0.1/convirture-tools-2.0.1.tar.gz
# tar zxvf convirture-tools-2.0.1.tar.gz
#
/root/convirture-tools/install/managed_server/scripts/convirt-tool
--bridge setup
我的这里出现了点小问题，发现网络没起来，所以不要远程来做这个操作，主要原因是里面的配置文件有点需要
小的更改，我的是UUID注释了。
# ls ifcfg-*
ifcfg-br1 ifcfg-br2 ifcfg-br3 ifcfg-br4 ifcfg-em1 ifcfg-em2
ifcfg-em3 ifcfg-em4 ifcfg-lo
我这里有四个物理网卡，所以生成了四个bridge,不过真实用的只有br1
这个工具好有一个好处就是保存了原配置文件，如果你不想用时还可以还原
# ls saved.ifcfg-em*
saved.ifcfg-em1.20121128.101114 saved.ifcfg-em3.20121128.101114
saved.ifcfg-em2.20121128.101114 saved.ifcfg-em4.20121128.101114
看下ifceg-em1
# cat ifcfg-em1
DEVICE="em1"
#BOOTPROTO=none
NM_COnTROLLED="yes"
OnBOOT=yes
TYPE="Ethernet"
#UUID="3bc7fdcc-42b1-4223-b202-e697305897c8"
#IPADDR172.16.10.81
PREFIX=24
GATEWAY=172.16.10.254
DNS1=172.16.10.5
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System em1"
HWADDR=90:B1:1C:20:4D:A5
BRIDGE=br1
看下ifcfg-br1
# cat ifcfg-br1
DEVICE="br1"
BOOTPROTO=none
NM_COnTROLLED="yes"
OnBOOT=yes
#UUID="3bc7fdcc-42b1-4223-b202-e697305897c8"
IPADDR=172.16.10.81
PREFIX=24
GATEWAY=172.16.10.254
DNS1=172.16.10.5
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System br1"
TYPE=Bridge
最后看下网卡
# ifconfig
br1 Link encap:Ethernet HWaddr 90:B1:1C:20:4D:A5
inet addr:172.16.10.81 Bcast:172.16.10.255 Mask:255.255.255.0
inet6 addr: fe80::92b1:1cff:fe20:4da5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10219 errors:0 dropped:0 overruns:0 frame:0
TX packets:3776 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:576031 (562.5 KiB) TX bytes:15928008 (15.1 MiB)
em1 Link encap:Ethernet HWaddr 90:B1:1C:20:4D:A5
inet6 addr: fe80::92b1:1cff:fe20:4da5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10362 errors:0 dropped:0 overruns:0 frame:0
TX packets:13131 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:766684 (748.7 KiB) TX bytes:16489098 (15.7 MiB)
Interrupt:35
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:144411 errors:0 dropped:0 overruns:0 frame:0
TX packets:144411 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:147381248 (140.5 MiB) TX bytes:147381248 (140.5 MiB)
virbr0 Link encap:Ethernet HWaddr 52:54:00:F1:6B:6E
inet addr:192.168.122.1 Bcast:192.168.122.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2028 errors:0 dropped:0 overruns:0 frame:0
TX packets:1135 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:233311 (227.8 KiB) TX bytes:89372 (87.2 KiB)
vnet0 Link encap:Ethernet HWaddr FE:54:00:50:58:7E
inet6 addr: fe80::fc54:ff:fe50:587e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:161 errors:0 dropped:0 overruns:0 frame:0
TX packets:3117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:15533 (15.1 KiB) TX bytes:263947 (257.7 KiB)
vnet1 Link encap:Ethernet HWaddr FE:54:00:B5:1A:19
inet6 addr: fe80::fc54:ff:feb5:1a19/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:56 errors:0 dropped:0 overruns:0 frame:0
TX packets:794 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:8754 (8.5 KiB) TX bytes:42245 (41.2 KiB)
5,启动虚拟机ubuntu10.04后配置网卡
#cat /etc/network/interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 172.16.10.100
netmask 255.255.255.0
gateway 172.16.10.254
#/etc/init.d/networking restart
启动即可
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