[root@localhost Desktop]# systemctl status network.service
network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: failed (Result: exit-code) since Sun 2016-10-30 10:16:58 CST; 3min 12s ago
Docs: man:systemd-sysv-generator(8)
Process: 11052 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS)
Process: 11318 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
Oct 30 10:16:13 localhost.localdomain network[11318]: Could not load file '/e...
Oct 30 10:16:13 localhost.localdomain network[11318]: Could not load file '/e...
Oct 30 10:16:13 localhost.localdomain network[11318]: [ OK ]
Oct 30 10:16:58 localhost.localdomain network[11318]: Bringing up interface W...
Oct 30 10:16:58 localhost.localdomain network[11318]: [FAILED]
Oct 30 10:16:58 localhost.localdomain network[11318]: Bringing up interface e...
Oct 30 10:16:58 localhost.localdomain systemd[1]: network.service: control pr...
Oct 30 10:16:58 localhost.localdomain systemd[1]: Failed to start LSB: Bring ...
Oct 30 10:16:58 localhost.localdomain systemd[1]: Unit network.service entere...
Oct 30 10:16:58 localhost.localdomain systemd[1]: network.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost Desktop]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:f9:72:2c brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 52:54:00:9f:61:80 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 500
link/ether 52:54:00:9f:61:80 brd ff:ff:ff:ff:ff:ff
注意上面加粗加红的字，这就是新的mac地址。
接下来就剩下修改ifcfg-XXX文件了，只修改HWADDR就可以了。接下来执行service network restart就正常了。
TYPE="Ethernet"
BOOTPROTO=dhcp
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
NAME="enp0s3"
UUID="7431ccd8-03a3-4717-b141-119851579162"
DEVICE="enp0s3"
ONBOOT="yes"
HWADDR=08:00:27:8B:CB:E5
PEERDNS=yes
PEERROUTES=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
~