CentOS6.3 KVM如何设置网卡为桥接模式

[/code]

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