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<table class="head">
<tr>
<td class="head-ltitle">ME(4)</td>
<td class="head-vol">Device Drivers Manual</td>
<td class="head-rtitle">ME(4)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">me</code> — <span class="Nd">encapsulating
network device</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp">To compile the driver into the kernel, place the following line in
the kernel configuration file:</p>
<div class="Bd Pp Bd-indent"><code class="Cd">device me</code></div>
<p class="Pp">Alternatively, to load the driver as a module at boot time, place
the following line in <a class="Xr">loader.conf(5)</a>:</p>
<div class="Bd Pp Bd-indent Li">
<pre>if_me_load="YES"</pre>
</div>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">me</code> network interface is a
point-to-point pseudo device encapsulating datagrams into IP. These
encapsulated datagrams are routed to a destination host, where they are
decapsulated and further routed to their final destination.</p>
<p class="Pp"><code class="Nm">me</code> interfaces are dynamically created and
destroyed with the <a class="Xr">ifconfig(8)</a>
<code class="Cm">create</code> and <code class="Cm">destroy</code>
subcommands.</p>
<p class="Pp">This driver corresponds to RFC 2004. Datagrams are encapsulated
into IP with a shorter encapsulation. The original IP header is modified and
the modifications are inserted between the so modified header and the
original payload. The protocol number 55 is used for outer header.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="NOTES"><a class="permalink" href="#NOTES">NOTES</a></h1>
<p class="Pp">For correct operation, the <code class="Nm">me</code> device needs
a route to the decapsulating host that does not run over the tunnel, as this
would be a loop.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<p class="Pp"><a class="Xr">gif(4)</a>, <a class="Xr">gre(4)</a>,
<a class="Xr">inet(4)</a>, <a class="Xr">ip(4)</a>,
<a class="Xr">netintro(4)</a>, <a class="Xr">protocols(5)</a>,
<a class="Xr">ifconfig(8)</a>, <a class="Xr">sysctl(8)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Andrey V. Elsukov</span>
<<a class="Mt" href="mailto:ae@FreeBSD.org">ae@FreeBSD.org</a>></p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">March 4, 2026</td>
<td class="foot-os">FreeBSD 15.0</td>
</tr>
</table>
|
