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| VDETAPLIB(1) | FreeBSD General Commands Manual | VDETAPLIB(1) |
NAME
vdetaplib - Virtual Distributed Ethernet tap emulation librarySYNOPSIS
No synopsisDESCRIPTION
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/local/lib/libvdetap.so
setenv LD_PRELOAD /usr/local/lib/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
setenv VDEALLTAP /tmp/vde.ctl
It is also 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):
export tap0=/tmp/vde.ctl
export tap1=/tmp/myvde.ctl
export ppc=/tmp/ppc.ctl
setenv tap0 /tmp/vde.ctl
setenv tap1 /tmp/myvde.ctl
setenv ppc /tmp/ppc.ctl
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.
SEE ALSO
vde_switch(1), vdeq(1).AUTHOR
VDE is a project by Renzo Davoli <renzo@cs.unibo.it>| February 23, 2004 | Virtual Distributed Ethernet |
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