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RedHat6.5網卡問題總結

  1、找不到eth0檔案

  在使用redhat6.5,新裝好的系統,發現沒有eth0網卡,預設的第一個網卡是auto-eth0

[root@rac01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-auto_eth0

type=ethernet

bootproto=none

ipaddr=10.10.10.110

prefix=24

gateway=10.10.10.111

defroute=yes

ipv4_failure_fatal=yes

ipv6init=no

name=eth0

uuid=86d44060-4579-48cc-b85b-219a206ca37c

onboot=yes

hwaddr=00:50:56:95:09:76

last_connect=1411004329

  解決方法:

  直接更名ifcfg-auto_eth0檔案為eth0,重新開機網卡後會發現,網卡名已經變為eth0

  [root@rac01 ~]# service network restart

  bringing up loopback interface:                            [  ok  ]

  bringing up interface eth0:  active connection state: activated

  2、ifconfig 發現網卡服務名并未更改

[root@rac01 ~]# ifconfig

auto_eth0 link encap:ethernet  hwaddr 00:50:56:95:09:76

inet addr:10.10.10.110  bcast:10.10.10.111 mask:255.255.255.0

inet6 addr: fe80::250:56ff:fe95:976/64 scope:link

up broadcast running multicast  mtu:1500  metric:1

rx packets:484 errors:0 dropped:0 overruns:0 frame:0

tx packets:57 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

rx bytes:40095 (39.1 kib)  tx bytes:6271 (6.1 kib)

  每次更改redhat的網卡資訊,redhat會自動的将網卡的mac位址和對應的網卡服務名關系記錄在/etc/udev/rules.d/70-persistent-net.rules中,修改裡面的對應服務名即可

[root@rac01 ~]# vim /etc/udev/rules.d/70-persistent-net.rules

# this file was automatically generated by the /lib/udev/write_net_rules

# program, run by the persistent-net-generator.rules rules file.

#

# you can modify it, as long as you keep each rule on a single

# line, and change only the value of the name= key.

# pci device 0x15ad:0x07b0 (vmxnet3)

subsystem=="net", action=="add", drivers=="?*", attr{address}=="00:0c:29:1e:f6:ad", attr{type}=="1", kernel=="eth*", name="eth0"

修改完成後需重新開機一下系統,再次檢視網卡服務名已經更改

eth0      link encap:ethernet  hwaddr 00:50:56:95:09:76

inet addr:10.109.67.81  bcast:10.109.67.255  mask:255.255.255.0

rx packets:985 errors:0 dropped:0 overruns:0 frame:0

tx packets:61 errors:0 dropped:0 overruns:0 carrier:0

rx bytes:74395 (72.6 kib)  tx bytes:6527 (6.3 kib)

  3、網卡eth0被删除後,新加的網卡成了eth1,如何讓從eth0開始

eth1      link encap:ethernet  hwaddr 00:50:56:95:09:76

inet addr:10.10.10.110 bcast:10.10.10.111  mask:255.255.255.0

rx packets:830 errors:0 dropped:0 overruns:0 frame:0

rx bytes:63700 (62.2 kib)  tx bytes:6259 (6.1 kib)

eth2      link encap:ethernet  hwaddr 00:0c:29:1e:f6:b7

inet addr:10.10.10.120  bcast:10.10.10.111mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fe1e:f6b7/64 scope:link

rx packets:777 errors:0 dropped:0 overruns:0 frame:0

tx packets:11 errors:0 dropped:0 overruns:0 carrier:0

rx bytes:54938 (53.6 kib)  tx bytes:746 (746.0 b)

  同2問題類似,即可以手動的修改70-persistent-net.rules檔案,将對應的mac位址與網卡序号改成想要的,也可以直接删除該檔案,重新開機系統後,redhat會自動的建立該檔案,并從0開始計數。

  删除檔案,重新開機系統

  [root@rac01 ~]# mv /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/7

  0-persistent-net.rules.bak

  [root@rac01 ~]# reboot

  再次檢視,會發現已經從eht0開始

rx packets:206 errors:0 dropped:0 overruns:0 frame:0

tx packets:68 errors:0 dropped:0 overruns:0 carrier:0

rx bytes:19282 (18.8 kib)  tx bytes:7215 (7.0 kib)

eth1      link encap:ethernet  hwaddr 00:0c:29:1e:f6:b7

inet addr:10.109.67.83  bcast:10.109.67.255  mask:255.255.255.0

rx packets:131 errors:0 dropped:0 overruns:0 frame:0

rx bytes:8736 (8.5 kib)  tx bytes:746 (746.0 b)

 4、每次重新開機網卡,總是提示

  active connection path: /org/freedesktop/networkmanager/activeconnection/9

  此時網卡也可以正常通信,這個是因為redhat自己開發的networkmanager管理工具和/etc/sysconfig/network-scripts/ifcfg-ethx配置不同步造成的。

  要消除這個提示,請關閉networkmanager服務即可:

[root@rac01 ~]# service network restart

shutting down loopback interface:                        [  ok  ]

bringing up loopback interface:                            [  ok  ]

bringing up interface eth0:  active connection state: activated

active connection path: /org/freedesktop/networkmanager/activeconnection/2   [  ok  ]

bringing up interface eth1:  active connection state: activated

active connection path: /org/freedesktop/networkmanager/activeconnection/3   [  ok  ]

  關閉networkmanager服務

  [root@rac01 ~]# service networkmanager stop

  stopping networkmanager daemon:                            [  ok  ]

  再次重新開機網卡

  shutting down loopback interface:                     [  ok  ]

  bringing up loopback interface:                          [  ok  ]

  bringing up interface eth0:                                [  ok  ]

  bringing up interface eth1:                                [  ok  ]

  5、重新開機網卡出現提示:

  bringing up interface eth0:  determining if ip address 10.109.67.81 is already in use for device eth0...

  [  ok  ]

  bringing up interface eth1:  determining if ip address 10.109.67.83 is already in use for device eth1...

  該警告一般是由于網卡解析arp協定導緻的,可在網卡的配置檔案中加入arpcheck=no參數來屏蔽該檢查

[root@rac01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

ipaddr=10.109.67.81

gateway=10.109.67.254

arpcheck=no

  再次啟動網卡,一切正常

  shutting down interface eth0:                              [  ok  ]

  shutting down interface eth1:                              [  ok  ]

  shutting down loopback interface:                          [  ok  ]

最新内容請見作者的github頁:http://qaseven.github.io/

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