KVM虚拟机网卡桥接配置

#mkdir backup

#cp ifcfg-eth0 backup/

创建br0配置文件：

#vim ifcfg-br0

DEVICE=br0

BOOTPROTO=none

ONBOOT=yes

TYPE=Bridge

IPADDR=110.65.97.227

PREFIX=22

GATEWAY=110.65.96.1

DNS1=202.192.72.33

DNS2="http://so.21ops.com/cse/search?s=9181936462520079739&entry=1&q=8.8.8.8" class="bdcs-inlinelink"target="_blank">8.8.8.8<</code>/a>

这是eth0的原配置文件：

#cat ifcfg-eth0

DEVICE=eth0

HWADDR=B8:70:F4:40:8A:20

TYPE=Ethernet

"http://so.21ops.com/cse/search?s=9181936462520079739&entry=1&q=UUID"class="bdcs-inlinelink" target="_blank">UUID<</code>/a>=bee6af6c-4e20-4d28-81cd-8870b9d40ea9

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=110.65.97.227

PREFIX=22

GATEWAY=110.65.96.1

DNS1=202.192.72.33

DNS2=8.8.8.8

修改eth0的配置文件：

DEVICE=eth0

#HWADDR=B8:70:F4:40:8A:20

TYPE=Ethernet

#UUID=bee6af6c-4e20-4d28-81cd-8870b9d40ea9

ONBOOT=yes

NM_CONTROLLED=none

BOOTPROTO=none

#IPADDR=110.65.97.227

#PREFIX=22

#GATEWAY=110.65.96.1

#DNS1=202.192.72.33

#DNS2=8.8.8.8

BRIDGE=br0

尝试重启network服务：

[root@zsmin network-scripts]# service network restart

Shutting down interface eth0:                              [  OK  ]

Shutting down loopback interface:                          [  OK  ]

Bringing up loopback interface:                            [  OK  ]

Bringing up interface eth0:  Error: Connection activation failed: Master connection not found or invalid

                                                          [FAILED]

Bringing up interface wlan0:  Error: No suitable device found: no device found for connection 'wlan0'.

                                                          [FAILED]

Bringing up interface br0:  Error: Connection activation failed: Failed to determine connection's virtual interface name

                                                          [FAILED]

报错了。

这个需要我们关闭NetworkManager

#service NetworkManager stop

#chkconfig NetworkManager off

这时候，右上角的两台小电脑就会不见了。

再一次重启服务：

# service network restart

Shutting down loopback interface:                          [  OK  ]

Bringing up loopback interface:                            [  OK  ]

Bringing up interface eth0:                                [  OK  ]

Bringing up interface wlan0:  Device does not seem to be present, delaying initialization.

                                                          [FAILED]

Bringing up interface br0:  Determining if ip address 110.65.97.227 is already in use for device br0...

                                                          [  OK  ]

[root@zsmin network-scripts]# ifconfig br0

br0       Link encap:Ethernet  HWaddr B8:70:F4:40:8A:20  

         inet addr:110.65.97.227  Bcast:110.65.99.255  Mask:255.255.252.0

         inet6 addr: 2001:da8:2006:a438:ba70:f4ff:fe40:8a20/64 Scope:Global

         inet6 addr: fe80::ba70:f4ff:fe40:8a20/64 Scope:Link

         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:20050 errors:0 dropped:0 overruns:0 frame:0

         TX packets:1058 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0 

         RX bytes:2169121 (2.0 MiB)  TX bytes:245674 (239.9 KiB)

[root@zsmin network-scripts]# ifconfig eth0

eth0      Link encap:Ethernet  HWaddr B8:70:F4:40:8A:20  

         inet6 addr: fe80::ba70:f4ff:fe40:8a20/64 Scope:Link

         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:145869 errors:0 dropped:0 overruns:0 frame:0

         TX packets:13314 errors:0 dropped:0 overruns:0 carrier:1

         collisions:0 txqueuelen:1000 

         RX bytes:24030233 (22.9 MiB)  TX bytes:1933211 (1.8 MiB)

 

[root@zsmin network-scripts]# ping www.google.com

PING www.google.com (74.125.128.103) 56(84) bytes of data.

64 bytes from hg-in-f103.1e100.net (74.125.128.103): icmp_seq=1 ttl=38 time=96.3 ms

64 bytes from hg-in-f103.1e100.net (74.125.128.103): icmp_seq=2 ttl=38 time=96.1 ms

^C

--- www.google.com ping statistics ---

3 packets transmitted, 2 received, 33% packet loss, time 2031ms

rtt min/avg/max/mdev = 96.103/96.231/96.360/0.335 ms

之后，kvm虚拟机里面网卡设置就会出现br0了。