vdetaplib - Virtual Distributed Ethernet tap emulation library

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

Virtual Distributed Ethernet                    December 6, 2006                                    VDETAPLIB(1)

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

       To use it, the libvdetab.so library must be preloaded (sh, ksh or bash syntax):
              exportLD_PRELOAD=/usr/lib/vde2/libvdetap.so
       (csh, tchs syntax):
              setenvLD_PRELOAD/usr/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):
              exportVDEALLTAP=/tmp/vde.ctl
       (csh, tchs syntax):
              setenvVDEALLTAP/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 interface.
       (sh, ksh or bash syntax):
              exporttap0=/tmp/vde.ctlexporttap1=/tmp/myvde.ctlexportppc=/tmp/ppc.ctl
       (csh, tchs syntax):
              setenvtap0/tmp/vde.ctlsetenvtap1/tmp/myvde.ctlsetenvppc/tmp/ppc.ctl

       It is also possible to specify port, group or mode for a given interface setting environment variables as
       in the following example.
       (sh, ksh or bash syntax):
              exporttap0_port=5exporttap0_group=vde-netexporttap0_mode=0660
       (csh, tchs, syntax):
              setenvtap0_port5setenvtap0_groupvde-netsetenvtap0_mode0660

       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
       environment  variable (and for tun -- IFF_TUN interfaces) the kernel provided interface is used.  In this
       latter case access to /dev/net/tun is required, generally root access.

       vdetaplib - Virtual Distributed Ethernet tap emulation library

       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
       Technologies").

vde_switch(1), vdeq(1).

       No synopsis