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+.\"
+.\" Copyright (c) 1999, Boris Popov
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd June 20, 1999
+.Dt EF 4
+.Os BSD
+.Sh NAME
+.Nm ef
+.Nd
+pseudo-device driver provides support for multiple ethernet frame types.
+.Sh SYNOPSIS
+.Cd "kldload if_ef.ko"
+.Sh DESCRIPTION
+The 
+.Nm
+pseudo-device driver clones each ethernet type device with four
+additional interfaces. Each of them capable to send or receive only
+one predefined frame type.
+.Pp
+Names for the new interfaces created by adding
+.Ar fN
+suffix to an existing device name. Where 
+.Ar N
+is a device unit which can have one of the following values:
+.Bd -literal -offset indent
+0     interface with an Ethernet_II frame
+1     interface with a Novell Ethernet_802.3 frame
+2     interface with an Ethernet_802.2 frame
+3     interface with an Ethernet_802.2/SNAP frame support.
+.Ed
+.Pp
+For example, device
+.Ar ed0
+will be populated with four devices:
+.Ar ed0f0 ,
+.Ar ed0f1 ,
+.Ar ed0f2
+and
+.Ar ed0f3 .
+.Pp
+After that, each device can be configured as usually:
+.Dl # ifconfig ed0f1 ipx 0x105
+This will configure IPX protocol with network number
+.Ar 0x105
+and
+.Ar Ethernet_802.3
+frame type.
+.Pp
+Please note that it is impossible to configure IPX protocol on the 'raw'
+.Ar ed0
+device after
+.Ar if_ef.ko
+driver loaded.
+.Sh EXAMPLES
+The
+.Nm
+driver can be loaded via
+.Xr loader.conf 5
+file:
+.Dl if_ef_load="YES"
+.Pp
+In this case an ordinary interface configuration commands can be used
+in
+.Xr rc.conf 5
+file:
+.Dl network_interfaces="ed2 lo0 tun0 ed2f0 ed2f1"
+.Dl ifconfig_ed2f0_ipx="ipx 0x101"     
+.Dl ifconfig_ed2f1_ipx="ipx 0x102"
+.Sh DIAGNOSTICS
+None.
+.Sh CAVEATS
+Avoid to configuring 'raw' ethernet device for IPX protocol after
+.Nm
+driver is loaded.
+.Sh SEE ALSO
+.Xr ipx 3 ,
+.Xr ifconfig 8
+.Sh AUTHOR
+Boris Popov.