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<H1>IP-FOU</H1>
Section: Linux (8)<BR>Updated: 2 Nov 2014<BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
ip-fou - Foo-over-UDP receive port configuration
<P>
ip-gue - Generic UDP Encapsulation receive port configuration
<A NAME="lbAC">&nbsp;</A>
<H2>SYNOPSIS</H2>
<P>
<BR>
<B>ip</B>
[ <I>OPTIONS</I> ]
<B>fou</B>
{ <I>COMMAND</I> |
<B>help</B> }
<P>
<BR>
<B>ip fou add</B>
<B>port</B>
<I>PORT</I>
{
<B>gue</B>
|
<B>ipproto</B>
<I>PROTO</I>
}
[
<B>local</B>
<I>IFADDR</I>
]
[
<B>peer</B>
<I>IFADDR</I>
]
[
<B>peer_port</B>
<I>PORT</I>
]
[
<B>dev</B>
<I>IFNAME</I>
]
<BR>
<BR>
<B>ip fou del</B>
<B>port</B>
<I>PORT</I>
[
<B>local</B>
<I>IFADDR</I>
]
[
<B>peer</B>
<I>IFADDR</I>
]
[
<B>peer_port</B>
<I>PORT</I>
]
[
<B>dev</B>
<I>IFNAME</I>
]
<BR>
<BR>
<B>ip fou show</B>
<A NAME="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>
The
<B>ip fou</B>
commands are used to create and delete receive ports for Foo-over-UDP
(FOU) as well as Generic UDP Encapsulation (GUE).
<P>
Foo-over-UDP allows encapsulating packets of an IP protocol directly
over UDP. The receiver infers the protocol of a packet received on
a FOU UDP port to be the protocol configured for the port.
<P>
Generic UDP Encapsulation (GUE) encapsulates packets of an IP protocol
within UDP and an encapsulation header. The encapsulation header contains the
IP protocol number for the encapsulated packet.
<P>
When creating a FOU or GUE receive port, the port number is specified in
<I>PORT</I>
argument. If FOU is used, the IP protocol number associated with the port is specified in
<I>PROTO</I>
argument. You can bind a port to a local address/interface, by specifying the
address in the local
<I>IFADDR</I>
argument or the device in the
<I>IFNAME</I>
argument. If you would like to connect the port, you can specify the peer
address in the peer
<I>IFADDR</I>
argument and peer port in the peer_port
<I>PORT</I>
argument.
<P>
A FOU or GUE receive port is deleted by specifying
<I>PORT</I>
in the delete command, as well as local address/interface or peer address/port
(if set).
<A NAME="lbAE">&nbsp;</A>
<H2>EXAMPLES</H2>
<P>
<A NAME="lbAF">&nbsp;</A>
<H3>Configure a FOU receive port for GRE bound to 7777</H3>
<PRE>
# ip fou add port 7777 ipproto 47
</PRE><A NAME="lbAG">&nbsp;</A>
<H3>Configure a FOU receive port for IPIP bound to 8888</H3>
<PRE>
# ip fou add port 8888 ipproto 4
</PRE><A NAME="lbAH">&nbsp;</A>
<H3>Configure a GUE receive port bound to 9999</H3>
<PRE>
# ip fou add port 9999 gue
</PRE><A NAME="lbAI">&nbsp;</A>
<H3>Delete the GUE receive port bound to 9999</H3>
<PRE>
# ip fou del port 9999
</PRE><A NAME="lbAJ">&nbsp;</A>
<H3>Configure a FOU receive port for GRE bound to 1.2.3.4:7777</H3>
<PRE>
# ip fou add port 7777 ipproto 47 local 1.2.3.4
</PRE><A NAME="lbAK">&nbsp;</A>
<H2>SEE ALSO</H2>
<BR>
<B><A HREF="/cgi-bin/man/man2html?8+ip">ip</A></B>(8)
<A NAME="lbAL">&nbsp;</A>
<H2>AUTHOR</H2>
Tom Herbert &lt;<A HREF="mailto:therbert@google.com">therbert@google.com</A>&gt;
<P>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="1"><A HREF="#lbAB">NAME</A><DD>
<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT id="4"><A HREF="#lbAE">EXAMPLES</A><DD>
<DL>
<DT id="5"><A HREF="#lbAF">Configure a FOU receive port for GRE bound to 7777</A><DD>
<DT id="6"><A HREF="#lbAG">Configure a FOU receive port for IPIP bound to 8888</A><DD>
<DT id="7"><A HREF="#lbAH">Configure a GUE receive port bound to 9999</A><DD>
<DT id="8"><A HREF="#lbAI">Delete the GUE receive port bound to 9999</A><DD>
<DT id="9"><A HREF="#lbAJ">Configure a FOU receive port for GRE bound to 1.2.3.4:7777</A><DD>
</DL>
<DT id="10"><A HREF="#lbAK">SEE ALSO</A><DD>
<DT id="11"><A HREF="#lbAL">AUTHOR</A><DD>
</DL>
<HR>
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