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VDETAPLIB(1)		    General Commands Manual		  VDETAPLIB(1)

NAME
       vdetaplib - Virtual Distributed Ethernet	tap emulation library

SYNOPSIS
       No synopsis

DESCRIPTION
       vdetaplib  is a library that emulates tap (tuntap level2	interface, see
       in kernel sources Documentation/networking/tun.c) and connects tap vir-
       tual interfaces to vde networks.

       To  use it, the libvdetab.so library must be preloaded (sh, ksh or bash
       syntax):
	      export LD_PRELOAD=/usr/local/lib/vde2/libvdetap.so
       (csh, tchs syntax):
	      setenv LD_PRELOAD	/usr/local/lib/vde2/libvdetap.so

       If you want to divert all tap requests to a single vde_switch  set  the
       variable	VDEALLTAP to the vde socket.
       (sh, ksh	or bash	syntax):
	      export VDEALLTAP=/tmp/vde.ctl
       (csh, tchs syntax):
	      setenv VDEALLTAP /tmp/vde.ctl

       It  is  possible	to set each single interface to	different vde_switches
       by setting the environment variable with	the same name  of  the	inter-
       face.
       (sh, ksh	or bash	syntax):
	      export tap0=/tmp/vde.ctl
	      export tap1=/tmp/myvde.ctl
	      export ppc=/tmp/ppc.ctl
       (csh, tchs syntax):
	      setenv tap0 /tmp/vde.ctl
	      setenv tap1 /tmp/myvde.ctl
	      setenv ppc /tmp/ppc.ctl

       It  is  also possible to	specify	port, group or mode for	a given	inter-
       face setting environment	variables as in	the following example.
       (sh, ksh	or bash	syntax):
	      export tap0_port=5
	      export tap0_group=vde-net
	      export tap0_mode=0660
       (csh, tchs, syntax):
	      setenv tap0_port 5
	      setenv tap0_group	vde-net
	      setenv tap0_mode 0660

       The variable to set  the	 specific  interface  is  checked  first  then
       VDEALLTAP.  VDEALLTAP thus works	as a default choice for	the vde	switch
       to be used.  If VDEALLTAP is not	set and	there is no specific  environ-
       ment  variable  (and for	tun -- IFF_TUN interfaces) the kernel provided
       interface is used.  In this latter case access to /dev/net/tun  is  re-
       quired, generally root access.

NOTICE
       Virtual Distributed Ethernet is not related in any way with www.vde.com
       ("Verband der Elektrotechnik, Elektronik	und Informationstechnik"  i.e.
       the  German "Association	for Electrical,	Electronic & Information Tech-
       nologies").

SEE ALSO
       vde_switch(1), vdeq(1).

AUTHOR
       VDE is a	project	by Renzo Davoli	<renzo@cs.unibo.it>

Virtual	Distributed Ethernet   December	6, 2006			  VDETAPLIB(1)

NAME | SYNOPSIS | DESCRIPTION | NOTICE | SEE ALSO | AUTHOR

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