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wiz 2004-12-04 17:03:04 +00:00
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share/man/man4/lo.4
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@ -1,4 +1,4 @@
.\" $NetBSD: lo.4,v 1.8 2004/12/04 16:47:10 peter Exp $
.\" $NetBSD: lo.4,v 1.9 2004/12/04 17:03:04 wiz Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@ -29,7 +29,7 @@
.\"
.\" @(#)lo.4 8.1 (Berkeley) 6/5/93
.\"
.Dd June 5, 1993
.Dd December 4, 2004
.Dt LO 4
.Os
.Sh NAME
@ -40,36 +40,35 @@
.Sh DESCRIPTION
The
.Nm loop
interface is a software loopback mechanism which may be
used for performance analysis, software testing, and/or local
communication.
interface is a software loopback mechanism which may be used for
performance analysis, software testing, and/or local communication.
As with other network interfaces, the loopback 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
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 .
The loopback interface should be the last interface configured,
as protocols may use the order of configuration as an indication of priority.
The loopback interface should be the last interface configured, as
protocols may use the order of configuration as an indication of
priority.
The loopback should
.Em never
be configured first unless no hardware
interfaces exist.
be configured first unless no hardware interfaces exist.
.Pp
The loopback interface
.Nm lo0
is created at boottime, it always exists and cannot be destroyed with
is created at boottime, it always exists and cannot be destroyed
with
.Xr ifconfig 8 .
Additional loopback interfaces can be created by using the
.Xr ifconfig 8
.Sq create
.Cm create
command.
.Sh DIAGNOSTICS
.Bl -diag
.It lo%d: can't handle af%d .
The interface was handed
a message with addresses formatted in an unsuitable address
family; the packet was dropped.
The interface was handed a message with addresses formatted in an
unsuitable address family; the packet was dropped.
.El
.Sh SEE ALSO
.Xr inet 4 ,