Provided by: freebsd-manpages_8.0-1_all disc - software discard
network interface 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). 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.