Centos 7 network device naming
on Centos 7 new device names have long confusing names,
change grub line
root@testbox# cat /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos01/root rhgb quiet tsc=reliable nohz=off isolcpus=4,6,8,10,12,14,16,18,20,22 biosdevname=1"
GRUB_DISABLE_RECOVERY="true"
mkconfig grub
root@testbox# grub2-mkconfig -o /boot/grub2/grub.cfg
reboot
new device names will pick up names like em1, p1p1, p2p1, etc
configure em1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
NAME=em1
NM_CONTROLLED=yes
IPADDR=192.168.30.231
UUID=7ac23bb5-c31a-481e-ae15-4e603a4d763b
HWADDR=98:4b:e1:75:25:d4
DEVICE=em1
GATEWAY=192.168.30.1
ONBOOT=yes
PREFIX=32
DNS1=1.1.1.1