81 lines
2.9 KiB
Groff
81 lines
2.9 KiB
Groff
.\" $NetBSD: sl.4,v 1.1 1996/08/10 21:26:14 explorer Exp $
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.\"
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.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)lo.4 8.1 (Berkeley) 6/5/93
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.\" $FreeBSD$
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.\"
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.Dd August 10, 1996
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.Dt SL 4
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.Os
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.Sh NAME
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.Nm sl
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.Nd slip network interface
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.Sh SYNOPSIS
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.Cd "pseudo-device sl" Op Ar count
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.Sh DESCRIPTION
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The
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.Nm sl
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interface allows serial lines to be used as network interfaces using the
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.Em slip
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protocol. The
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.Nm sl
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interface can use Van Jacobson TCP header compression and ICMP filtering.
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This is arranged by using the various link-level flags to the
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.Xr ifconfig 8
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command:
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.Pp
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.Bl -tag -width LINK0X -compact
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.It Em link0
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Enable VJ header compression.
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.It Em link1
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Suppress ICMP traffic.
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.It Em link2
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Enable VJ header compression autodetection. This will turn on the
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.Em link0
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flag as soon as the first VJ-compressed packet has been seen by
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the driver.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It sl%d: af%d not supported.
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The interface was handed
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a message with addresses formatted in an unsuitable address
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family; the packet was dropped.
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.El
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.Sh SEE ALSO
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.Xr inet 4 ,
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.Xr intro 4 ,
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.Xr slattach 8 ,
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.Xr sliplogin 8 ,
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.Xr slstat 8
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