一开始配置的ifcfg-ens33
[root@cdh-141 ~]# cd /etc/sysconfig/network-scripts/[root@cdh-141 network-scripts]# lsifcfg-ens33 ?ifdown-post ?????ifup-aliases ?ifup-post ?????inactiveifcfg-lo ????ifdown-ppp ??????ifup-bnep ????ifup-ppp ??????init.ipv6-globalifdown ??????ifdown-routes ???ifup-eth ?????ifup-routes ???network-functionsifdown-bnep ?ifdown-sit ??????ifup-ippp ????ifup-sit ??????network-functions-ipv6ifdown-eth ??ifdown-Team ?????ifup-ipv6 ????ifup-Teamifdown-ippp ?ifdown-TeamPort ?ifup-isdn ????ifup-TeamPortifdown-ipv6 ?ifdown-tunnel ???ifup-plip ????ifup-tunnelifdown-isdn ?ifup ????????????ifup-plusb ???ifup-wireless[root@cdh-141 network-scripts]# more ifcfg-ens33 TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=c25dceec-3196-43f8-86a3-f393aa52a2a3DEVICE=ens33ONBOOT=yesDNS1=8.8.8.8DNS2=114.114.114.114IPADDR=192.168.0.141PREFIX=24GATEWAY=192.168.0.1IPV6_PEERDNS=yesIPV6_PEERROUTES=yes
问题状态：
执行 service network restart 出现以下错误
Restarting network (via systemctl): Job for network.service failed. See ‘systemctl status network.service‘ and ‘journalctl -xn‘ for details.
执行systemctl status network:
显示有标题的错误信息。《Failed to start LSB: Bring up/down networking.》 原因是mac地址的问题
执行ip addr显示以下ip列表：
解决方案：
修改ifcfg-ens33文件了，只修改HWADDR就可以了。接下来执行service network restart 就正常了。
修改后ifcfg-ens33
[root@cdh-141 network-scripts]# more ifcfg-ens33 TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=c25dceec-3196-43f8-86a3-f393aa52a2a3HWADDR=00:0c:29:93:9e:97DEVICE=ens33ONBOOT=yesDNS1=8.8.8.8DNS2=114.114.114.114IPADDR=192.168.0.141PREFIX=24GATEWAY=192.168.0.1IPV6_PEERDNS=yesIPV6_PEERROUTES=yes
Centos7：Failed to start LSB: Bring up/down networking
原文地址：https://www.cnblogs.com/yy3b2007com/p/9976206.html