freebsd man page for if_disc

DISC(4) 						   BSD Kernel Interfaces Manual 						   DISC(4)

NAME
     disc -- software discard network interface

SYNOPSIS
     device disc

DESCRIPTION
     The disc interface is a software discard mechanism which may be used for performance analysis and/or software testing.  As with other network
     interfaces, the discard interface must have network addresses assigned for each address family with which it is to be used.  These addresses
     may be set or changed with the SIOCSIFADDR ioctl(2).

     Each disc interface is created at runtime using interface cloning.  This is most easily done with the ifconfig(8) create command or using the
     cloned_interfaces variable in rc.conf(5).

SEE ALSO
     inet(4), intro(4)

HISTORY
     The disc device appears to have been derived from the lo(4) device around the time of 4.4BSD.  This manpage was adapted from lo(4) and first
     appeared in FreeBSD 5.0.

BSD
								   May 25, 2002 							       BSD