Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

vdetaplib(1) [debian man page]

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
       virtual interfaces to vde networks.

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

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 Technologies").

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)

Check Out this Related Man Page

VDE_PCAPPLUG(1) 					      General Commands Manual						   VDE_PCAPPLUG(1)

NAME

       vde_pcapplug - Virtual Distributed Ethernet libpcap cable

SYNOPSIS

       vde_pcapplug [OPTION]... interface

DESCRIPTION

       vde_pcapplug  is  a plug to be connected into a VDE switch.  All the data that is catched by the plug is injected into interface and every-
       thing from that interface is sent in the switch.

OPTIONS

       -p, --port=portnum
	      It is possible to decide which port of the switch to use.  When this option is not specified the switch assigns the first  available
	      unused  port  (if  any).	It is possible to connect several cables in the same switch port: in this way all this cables work concur-
	      rently.  It means that packet can result as duplicate but no ARP table loops are generated.  Is useful when vde is used  for  mobil-
	      ity. Several physical interfaces can be used at a time during handoffs to prevent hichups in connectivity.

       -g, --group=group
	      group  ownership	of the communication socket. For security when more want to share a switch it is better to use a unix group to own
	      the comm sockets so that the network traffic cannot be sniffed.

       -m, --mod=octal-mode
	      octal chmod like permissions for the comm sockets

       -s, --sock=socket
	      specify the UNIX socket to be used by local programs for joining the VDE.  The default value is "/tmp/vde.ctl".

       -d, --daemon
	      start vde_plug2tap as a background process

       -P, --pidfile=pidfile
	      put the process ID of vde_plug2tap in pidfile. Can be used with --daemon to store the PID for future killing.

       -h, --help
	      show a brief help

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 Technologies").

SEE ALSO

       vde_switch(1), vde_plug(1), vdeq(1), dpipe(1).

AUTHOR

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

Virtual Distributed Ethernet					  August 20, 2008						   VDE_PCAPPLUG(1)
Man Page