Centos 6.2 安装完后无法上网问题

Centos 6.2安装完成之后，赶紧运行lspci，来查看硬件信息，结果很让人失望：

[root@localhost ~]# lspci
-bash: lspci: command not found

接下来运行：
[root@localhost ~]# yum -y install pciutils
发现无法上网，再运行：
[root@localhost ~]# ifconfig
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:0 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:0 (0.0 b)  TX bytes:0 (0.0 b)

竟然没有eth0/eth1的信息，很郁闷。

从网上下载pciutils-2.2.0.tar.gz，然后通过U盘安装，之后发现lspci终于可以用了。

[root@localhost ~]# lspci
00:00.0 Host bridge: Intel Corporation Unknown device 29c0 (rev 10)
00:02.0 VGA compatible controller: Intel Corporation Unknown device 29c2 (rev 10)
00:1b.0 Class 0403: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial ATA Storage Controllers cc=IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Unknown device 8136 (rev 02)
03:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

然后查看系统内核是否包含了网卡的驱动信息。

[root@localhost ~]# cd /lib/modules/2.6.32-220.el6.i686/kernel/drivers/net/
[root@localhost net]# ls
3c509.ko     bnx2.ko     e100.ko       jme.ko         pcmcia          r6040.ko      sundance.ko      virtio_net.ko
3c59x.ko     bnx2x       enic          macvlan.ko     pcnet32.ko      r8169.ko      sungem.ko        vmxnet3
8139cp.ko    bonding     epic100.ko    macvtap.ko     phy             s2io.ko       sungem_phy.ko    vxge
8139too.ko   can         ethoc.ko      mdio.ko        ppp_async.ko    sc92031.ko    sunhme.ko        wan
8390.ko      cassini.ko  ewrk3.ko      mii.ko         ppp_deflate.ko  sfc           tehuti.ko        wimax
8390p.ko     chelsio     fealnx.ko     mlx4           ppp_generic.ko  sis190.ko     tg3.ko           wireless
acenic.ko    cnic.ko     forcedeth.ko  myri10ge       ppp_mppe.ko     sis900.ko     tlan.ko          xen-netfront.ko
amd8111e.ko  cxgb3       ifb.ko        natsemi.ko     pppoe.ko        skge.ko       tulip
atl1c        cxgb4       igb           ne2k-pci.ko    pppol2tp.ko     sky2.ko       tun.ko
atl1e        dl2k.ko     igbvf         ne.ko          pppox.ko        slhc.ko       typhoon.ko
atlx         dnet.ko     ipg.ko        netconsole.ko  ppp_synctty.ko  slip.ko       usb
b44.ko       dummy.ko    ixgb          netxen         qla3xxx.ko      smc-ultra.ko  veth.ko
benet        e1000       ixgbe         niu.ko         qlcnic          smsc9420.ko   via-rhine.ko
bna          e1000e      ixgbevf       ns83820.ko     qlge            starfire.ko   via-velocity.ko

 

重新加载一下网卡驱动：

[root@localhost net]# insmod 8139too.ko  
[root@localhost net]# insmod 8139cp.ko  

[root@localhost net]# ethtool -i eth1
driver: 8139too
version: 0.9.28
firmware-version:
bus-info: 0000:03:07.0

再次运行：

[root@localhost net]# service network restart
[root@localhost net]# ifconfig
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:0 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:0 (0.0 b)  TX bytes:0 (0.0 b)

 

再次郁闷！

    

    

直接用命令配置IP：
[root@localhost net]# ifconfig eth1 192.168.1.123
[root@localhost net]# ifconfig
eth1      Link encap:Ethernet  HWaddr 4C:00:10:42:10:3B
          inet addr:192.168.1.123  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::4e00:10ff:fe42:103b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:518 errors:0 dropped:0 overruns:0 frame:0
          TX packets:315 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:46693 (45.5 KiB)  TX bytes:47572 (46.4 KiB)
          Interrupt:23 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:0 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:0 (0.0 b)  TX bytes:0 (0.0 b)

测试一下是否正常： 

[root@localhost ~]# ping 192.168.1.212
PING 192.168.1.212 (192.168.1.212) 56(84) bytes of data.
64 bytes from 192.168.1.212: icmp_seq=1 ttl=64 time=2.41 ms
64 bytes from 192.168.1.212: icmp_seq=2 ttl=64 time=0.633 ms
64 bytes from 192.168.1.212: icmp_seq=3 ttl=64 time=0.633 ms
64 bytes from 192.168.1.212: icmp_seq=4 ttl=64 time=0.674 ms

 

OK，成功了！