1.\" $NetBSD: ppp.4,v 1.6 2001/09/22 15:58:14 wiz Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" From: @(#)lo.4 8.1 (Berkeley) 6/5/93 35.\" 36.Dd August 10, 1996 37.Dt PPP 4 38.Os 39.Sh NAME 40.Nm ppp 41.Nd point to point protocol network interface 42.Sh SYNOPSIS 43.Nm pseudo-device ppp 44.Op Ar count 45.Sh DESCRIPTION 46The 47.Nm 48interface allows serial lines to be used as network interfaces using the 49.Em Point-to-Point Protocol 50(PPP). 51The 52.Nm 53interface can use various types of compression and has many features 54over the SLIP protocol used by the 55.Xr sl 4 56interface. 57.Sh DIAGNOSTICS 58.Bl -diag 59.It ppp%d: af%d not supported . 60The interface was handed 61a message with addresses formatted in an unsuitable address 62family; the packet was dropped. 63.El 64.Sh SEE ALSO 65.Xr inet 4 , 66.Xr intro 4 , 67.Xr sl 4 , 68.Xr pppd 8 , 69.Xr pppstats 8 70.Rs 71.%R RFC 72.%N 1661 73.%D July 1994 74.%T "The Point-to-Point Protocol (PPP)" 75.Re 76.Sh HISTORY 77The 78.Nm 79device appeared in 80.Nx 1.0 . 81.Sh BUGS 82Currently, only the 83.Xr ip 4 84protocol is supported. 85