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EF(4)		       FreeBSD Kernel Interfaces Manual			 EF(4)

NAME
     ef	-- pseudo-device driver	providing support for multiple Ethernet	frame
     types

SYNOPSIS
     device ef

DESCRIPTION
     The ef pseudo-device driver clones	each Ethernet type device with four
     additional	interfaces.  Each of them is capable to	send or	receive	only
     one predefined frame type.

     Names for the new interfaces are created by adding	a fN suffix to an
     existing device name.  Where N is a device	unit which can have one	of the
     following values:

	   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.

     For example, device ed0 will be populated with four devices: ed0f0,
     ed0f1, ed0f2 and ed0f3.

     After that, each device can be configured as usual:
	   # ifconfig ed0f1 ipx	0x105
     This will configure IPX protocol with network number 0x105	and
     Ethernet_802.3 frame type.

     Please note that it is impossible to configure the	IPX protocol on	the
     parent ed0	device after the if_ef.ko driver has been loaded.

     If	the parent interface is	not configured for any other protocol (IP for
     example), subinterfaces will not function.	 To avoid that,	the parent
     interface should be manually marked as ``up'':
	   # ifconfig ed0 up

EXAMPLES
     The ef driver can be loaded via the loader.conf(5)	file:
	   if_ef_load="YES"

     In	this case, ordinary interface configuration commands can be used in
     the rc.conf(5) file:
	   network_interfaces="ed2 lo0 tun0 ed2f0 ed2f1"
	   ifconfig_ed2f0_ipx="ipx 0x101"
	   ifconfig_ed2f1_ipx="ipx 0x102"

DIAGNOSTICS
     None.

SEE ALSO
     ipx(3), ifconfig(8)

AUTHORS
     Boris Popov <bp@FreeBSD.org>.

CAVEATS
     Avoid to configure	the parent Ethernet device for the IPX protocol, after
     the ef driver is loaded.

FreeBSD	10.1			 June 20, 1999			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | DIAGNOSTICS | SEE ALSO | AUTHORS | CAVEATS

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