A basic understanding of networking is important for system admin. Not only is it essential for getting your services online and running smoothly, it also give you the insight to diagnose problems.
This article will privides an overview of the common network related operations.
Assign static ip addresses
Bring it up/down
Rename a connection
Consistent network device name
A rule in /usr/lib/udev/rules.d/60-net.rules instructs the udev helper utility, /lib/udev/rename_device, to look into all /etc/sysconfig/network-scripts/ifcfg-suffix files. If it finds an ifcfg file with a HWADDR entry matching the MAC address of an interface it renames the interface to the name given in the ifcfg file by the DEVICE directive.
this will write HWADDR to ifcfg-suffix file, verify it