[root@localhost ~]# ifconfig
eth0    Link encap:Ethernet  HWaddr 00:E0:4C:40:49:79
      inet addr:192.168.12.16  Bcast:192.168.12.255  Mask:255.255.255.0
      inet6 addr: fe80::2e0:4cff:fe40:4979/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:1595 errors:0 dropped:0 overruns:0 frame:0
      TX packets:264 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:165962 (162.0 KiB)  TX bytes:37643 (36.7 KiB)

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:2919 errors:0 dropped:0 overruns:0 frame:0
      TX packets:2919 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:4226556 (4.0 MiB)  TX bytes:4226556 (4.0 MiB)

peth0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
      inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
      UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
      RX packets:2470 errors:0 dropped:0 overruns:0 frame:0
      TX packets:342 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:219605 (214.4 KiB)  TX bytes:52273 (51.0 KiB)
      Interrupt:5 Base address:0x8c00

vif0.0 Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
      inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
      UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
      RX packets:291 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1610 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:41737 (40.7 KiB)  TX bytes:166862 (162.9 KiB)

virbr0 Link encap:Ethernet  HWaddr 00:00:00:00:00:00
      inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
      inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:0 (0.0 b)  TX bytes:10160 (9.9 KiB)

xenbr0 Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
      UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
      RX packets:1375 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:125483 (122.5 KiB)  TX bytes:0 (0.0 b)

其实会出现这样的问题是libvirtd ,xend这些服务开启的。这也是网桥的模式。
把libvirtd 和 xend 这两个服务关掉并且禁止系统启动时开启服务。
#/etc/init.d/libvirtd stop
#/etc/init.d/xend stop
#chkconfig libvirtd off
#chkconfig xend off

[root@localhost ~]# ifconfig
eth0    Link encap:Ethernet  HWaddr 00:E0:4C:40:49:79
      inet addr:192.168.12.16  Bcast:192.168.12.255  Mask:255.255.255.0
      inet6 addr: fe80::2e0:4cff:fe40:4979/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:611 errors:0 dropped:0 overruns:0 frame:0
      TX packets:147 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:66775 (65.2 KiB)  TX bytes:18823 (18.3 KiB)
      Interrupt:5 Base address:0x4c00

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:1559 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1559 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:3118312 (2.9 MiB)  TX bytes:3118312 (2.9 MiB)

正常了。。

http://hi.baidu.com/du_hu999/item/7b8154424c543d95823ae155

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