---
name: "uml_switch"
section: "1"
platform: "linux"
package: "uml-utilities"
version: "20070815.4-2.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/uml_switch"
---

# uml\_switch(1)

switch daemon for user-mode Linux

## NAME

uml\_switch — switch daemon for user-mode Linux

## SYNOPSIS

**uml\_switch** \[**-unix** *control\_socket* *data\_socket*\]  \[**-hub**\]  \[**-tap** *tun device\]  \[***-compat-v0***\]  \[***-daemon***\]*

## DESCRIPTION

*This manual page documents briefly the*  **uml\_switch** program.

This manual page was written for the **Debian GNU/Linux** distribution  because the original program does not have a manual page.

**uml\_switch** is a daemon for managing a  virtual network between user-mode Linux systems, with no  connection to the host system's network.

It will listen for connections on a pair of UNIX domain  sockets, and forward packets between clients which connect to  them.

## OPTIONS

- **-unix** *control\_socket* *data\_socket*

  Listen on the specified pair of sockets, instead of  the defaults.

- **-hub**

  Act like a hub.  This means that packets received will  be broadcast over all virtual links.  The default is to act  as a switch, where packets are only sent to the link  matching the destination MAC address of the packet.

- **-tap** *tap device*

  Connect the switch to a dynamically created tap device  on the host

- **-compat-v0**

  Specify control protocol version 0 compatibility.

- **-daemon**

  Run in the background as a daemon.

## SEE ALSO

[linux(1)](/linux/1.md)

The *UserModeLinux-HOWTO (link to URL http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html)*

## AUTHOR

uml\_switch was written by Jeff Dike and others.

This manual page was written by Matt Zimmerman mdz@debian.org for  the **Debian GNU/Linux** system (but may be used by others).  Permission is  granted to copy, distribute and/or modify this document under  the terms of the GNU Free Documentation  License, Version 1.1 or any later version published by the Free  Software Foundation; with no Invariant Sections, no Front-Cover  Texts and no Back-Cover Texts.