[root@localhost ~]# man ifcfg
 This manual page documents briefly the ifcfg command.

       This is a simplistic script replacing one option of ifconfig , namely, IP address
       management. It not only adds addresses, but also carries out Duplicate Address
       Detection RFC-DHCP, sends unsolicited ARP to update the caches of other hosts shar-
       ing the interface, adds some control routes and restarts Router Discovery when it
       is necessary.

       I strongly recommend using it instead of ifconfig both on hosts and on routers.

IFCONFIG - COMMAND SYNTAX
       DEVICE - it may have alias, suffix, separated by colon.

       command
              - add, delete or stop.

       address
              - optionally followed by prefix length.

       peer   - optional peer address for pointpoint interfaces.

EXAMPLE
       This function determines, whether this is router or host.  It returns 0, if the
       host is apparently not router.

SEE ALSO
       ip-cref.dvi