如何解决centos7将网卡加入到网桥后Missing config file br-ex网卡无法正常启动问题

小编给大家分享一下如何解决centos7将网卡加入到网桥后Missing config file br-ex网卡无法正常启动问题，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！

原来的/etc/sysconfig/network-scripts/ifcfg-ens2

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1. HWADDR=68:05:CA:11:XX:XX

2. TYPE=Ethernet

3. BOOTPROTO=none

4. NAME=ens2

5. UUID=bc723ed2-3196-491b-8e25-bf4a56a63c81

6. ONBOOT=yes

/var/log/message

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1. Nov 25 13:42:50 localhost network: Bringing up interface ens2: Error: either "dev" is duplicate, or "br-ex" is a garbage.

2. Nov 25 13:42:50 localhost network: cat: /sys/class/net/ens2: Is a directory

3. Nov 25 13:42:50 localhost network: cat: br-ex/ifindex: No such file or directory

4. Nov 25 13:42:50 localhost network: /etc/sysconfig/network-scripts/ifup-eth: line 273: 1000 + : syntax error: operand expected (error

5. token is "+ ")

6. Nov 25 13:42:50 localhost network: ERROR : [/etc/sysconfig/network-scripts/ifup-aliases] Missing config file br-ex.

7. Nov 25 13:42:50 localhost /etc/sysconfig/network-scripts/ifup-aliases: Missing config file br-ex.

网卡启动的脚本分别是

/etc/init.d/netwrok -> /usr/sbin/ifup -> /etc/sysconfig/network-scripts/network-functions

-> /etc/sysconfig/network-scripts/ifup-eth

通过跟踪各个变量发现问题是系统将DEVICE变量设置为了"ens2 br-ex2"
所以才会出现上述奇怪的log，而正确的DEVICE应该就为"ens2"

主要原因是在ifcfg-ens2 文件中没有DEVICE参数，network-functions 会根据mac地址找设备，但br-ex的Mac地址和ens2相同，所以得到的DEVICE就是错误。

解决办法就是增加DEVICE参数，修改后的/etc/sysconfig/network-scripts/ifcfg-ens2 如下

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1. DEVICE=ens2

看完了这篇文章，相信你对"如何解决centos7将网卡加入到网桥后Missing config file br-ex网卡无法正常启动问题"有了一定的了解，如果想了解更多相关知识，欢迎关注行业资讯频道，感谢各位的阅读！