81 lines
2.8 KiB
Groff
81 lines
2.8 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" From: @(#)lo.4 8.1 (Berkeley) 6/5/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 25, 2002
|
|
.Dt DISC 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm disc
|
|
.Nd software discard network interface
|
|
.Sh SYNOPSIS
|
|
.Cd "device disc"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
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
|
|
.Dv SIOCSIFADDR
|
|
.Xr ioctl 2 .
|
|
.Pp
|
|
Each
|
|
.Nm
|
|
interface is created at runtime using interface cloning.
|
|
This is
|
|
most easily done with the
|
|
.Xr ifconfig 8
|
|
.Cm create
|
|
command or using the
|
|
.Va cloned_interfaces
|
|
variable in
|
|
.Xr rc.conf 5 .
|
|
.Sh SEE ALSO
|
|
.Xr inet 4 ,
|
|
.Xr intro 4
|
|
.\" .Xr ns 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device appears to have been derived from the
|
|
.Xr lo 4
|
|
device around the time of
|
|
.Bx 4.4 .
|
|
This manpage was adapted from
|
|
.Xr lo 4
|
|
and first appeared in
|
|
.Fx 5.0 .
|