CentOS 下網路報錯 Device eth0 does not seem to be present

標籤：

在執行network服務重啟後，出現Device eth0 does not seem to be present  問題，主要是因為系統之前有多個網卡配置，和設定檔不匹配造成的。

解決這種問題，思路是先看系統網卡設定檔中目前的配置情況，然後再在網路設定檔中修改相應的配置

具體現象：

service network restart
Shutting down loopback insterface:                                                                                                     [  OK  ]
Bringing up loopback insterface:                                                                                                          [  OK  ]
Bringing up interface eth0:  Device eth0 does not seem to be present,delaying initialization.                     [FAILED]

 

解決辦法：

1、查看網路設定檔

cat /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 0x8086:0x100f (e1000)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:6f:02:c2", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"# PCI device 0x8086:0x100f (e1000)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:d0:74:01", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"# PCI device 0x8086:0x100f (e1000)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:bc:4e:d6", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"# PCI device 0x8086:0x100f (e1000)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:78:35:ae", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

在使用ifconfig命令執行後，顯示的網卡為最後一個eth3，現在我們不需要eth3,想改回eth0。在/etc/sysconfig/network-scripts/檔案夾中只有ifcfg-eth0

# 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 0x8086:0x100f (e1000)#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:6f:02:c2", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"# PCI device 0x8086:0x100f (e1000)#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:d0:74:01", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"# PCI device 0x8086:0x100f (e1000)#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:bc:4e:d6", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"# PCI device 0x8086:0x100f (e1000)SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:78:35:ae", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

最後條記錄是目前在用的網卡的資料，包括mac地址資訊，需要把最後一條的網卡名稱從eth3,改成eth0，然後修改ifcfg-eth0

DEVICE="eth0"BOOTPROTO="static"HWADDR="00:0c:29:78:35:ae"IPV6INIT="yes"NM_CONTROLLED="yes"ONBOOT="yes"TYPE="Ethernet"NETMASK=255.255.255.0IPADDR=192.168.114.128GATEWAY=192.168.114.1

吧hwaddr改成70-persistent-net.rules檔案中最後一條記錄的mac地址。

重啟修改成功。

 

注意：

如果沒有關閉NetworkManager，則需要關閉

service NetworkManager stop

chkconfig NetworkManager off

CentOS 下網路報錯 Device eth0 does not seem to be present