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vde_switch: Virtual Distributed Ethernet switch


vde_switch - Virtual Distributed Ethernet switch


vde_switch [ -hub ] [ -sock commdirpath ] [ -mod octal-mode ] [ -group NAME ] [ -tap interface ] [ -daemon ]


A vde_switch is a virtual switch for the vde architecture. A vde network can include several vde_switches running on different (real) computers. vde_switches can be connected by vde cables (see vde_plug (1) ). Supported architecture for VDE end nodes include: real linux boxes (through the tuntap interface), bochs, qemu and MPS virtual machines. VDE is useful to create networks of heterogeneous virtual machines as well as as a general tunneling tool -- all the ethernet based protocols work by this kind of tunnel -- and also as a tool for mobility. In fact VDE creates an overlay network where users can keep their IP addresses despite of the change of IP addresses on the interfaces. vde_switch needs root privileges to open a tap interface, can be run by users when no -tap option is specified. vde-2 has several features: VLAN, Fast Spanning Tree Protocol, command line management (on console for foreground switches, on a terminal for daemonized switches). If a vde_switch run in foreground mode simply type return to have the prompt. For daemons there is the -M option to specify the management socket. Unixterm is the tool to start a terminal for the management. Type "help" at the prompt for a list of possible options.


-hub turn off the switch engine. It operates as a hub. -sock commdirpath specify the directory when comm socket are created. The default value is "/tmp/vde.ctl" -mod octalmode specify the octal permissions for the comm sockets. -group NAME specify the group owner for the comm socket. The default value is the current user's primary group -tap interface connect the specified tuntap interface to this vde_switch (needs root privileges) It is possible to specify several tap interfaces, comma separated. -daemon Run as a daemon. Use syslog for logging. -f rcfile rc file to set the initial switch configuration. This rc file has the same syntax of the command line interface. -h help. Please use it for a more complete list of options. vde_switch is a modular program, options vary depending of the compiled-in modules.
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_plug(1), vde_plug2tap(1), vdeq(1), dpipe(1), unixterm(1).


VDE is a project by Renzo Davoli <renzo@cs.unibo.it> VDE started as an enhancement of uml_switch by Jeff Dike and others. VDE-2 has been almost completely rewritten but maybe some statements come from the historical source. So, some copyright and thanks also for Dike&Co. VDE_SWITCH(1)

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