OpenBSD-4.6/share/man/man4/ppp.4

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.\"     From:	@(#)lo.4	8.1 (Berkeley) 6/5/93
.\"
.Dd $Mdocdate: January 31 2009 $
.Dt PPP 4
.Os
.Sh NAME
.Nm ppp
.Nd Point-to-Point Protocol network interface
.Sh SYNOPSIS
.Cd "pseudo-device ppp"
.Sh DESCRIPTION
The
.Nm
interface allows serial lines to be used as network interfaces using the
.Em Point-to-Point Protocol
(PPP).
.Pp
A
.Nm
interface can be created at runtime using the
.Ic ifconfig ppp Ns Ar N Ic create
command or by setting up a
.Xr hostname.if 5
configuration file for
.Xr netstart 8 .
.Pp
The
.Nm
interface can use various types of compression and has many advantages
over the SLIP protocol used by the
.Xr sl 4
interface.
.Sh DIAGNOSTICS
.Bl -diag
.It ppp%d: af%d not supported
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 ,
.Xr sl 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8 ,
.Xr netstart 8 ,
.Xr pppd 8 ,
.Xr pppstats 8
.Rs
.%R RFC 1661
.%D July 1994
.%T "The Point-to-Point Protocol (PPP)"
.Re
.Sh HISTORY
The
.Nm
device appeared in
.Ox 1.2 .
.Sh BUGS
Currently, only the
.Xr ip 4
protocol is supported.