解決CentOS 7 開機網路裝置不啟動方法

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解決CentOS 7 開機網路裝置不啟動方法

在VMware 10裡新裝一個CentOS 7系統,開機發現沒有網路,於是ifconfig一下發現網卡沒有啟動

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

ether 00:0c:29:2b:c0:1e txqueuelen 1000 (Ethernet)

RX packets 1 bytes 251 (251.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 0 bytes 0 (0.0 B)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10<host>

loop txqueuelen 0 (Local Loopback)

RX packets 386 bytes 33512 (32.7 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 386 bytes 33512 (32.7 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

習慣性的重啟網卡服務“service network restart”

提示:

Restarting network (via systemctl): [ OK ]

重啟OK,,,,

再查看網卡"ifconfig"

還是老樣子

於是"ifup eno16777736"手動重啟網卡

提示:

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/0)

啟動成功

再查看網卡狀態"ifconfig"

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

inet 192.168.41.128 netmask 255.255.255.0 broadcast 192.168.41.255

inet6 fe80::20c:29ff:fe2b:c01e prefixlen 64 scopeid 0x20<link>

ether 00:0c:29:2b:c0:1e txqueuelen 1000 (Ethernet)

RX packets 74 bytes 9637 (9.4 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 61 bytes 7083 (6.9 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10<host>

loop txqueuelen 0 (Local Loopback)

RX packets 650 bytes 56612 (55.2 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 650 bytes 56612 (55.2 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


OK,,得到IP問題解決,,

後續:

本來這個問題不會出現的,主要是我的網路環境是有DHCP伺服器,IP地址可以自動獲得。如果是手動輸入IP就不會出現這個問題了,因為在網卡設定檔裡有一項"ONBOOT=no"表示引導時不啟用網卡,由於對centos7不熟悉,所以未發現這個問題。

上面的解決方案是不徹底的,因為每重啟一次伺服器就需要輸入一次"ifup eno16777736",很是麻煩,我們可以修改網卡的設定檔"/etc/sysconfig/network-scripts/ifcfg-eno16777736"裡面的"ONBOOT=no"修改成"ONBOOT=yes",至此問題徹底解決!

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