diff options
Diffstat (limited to 'static/freebsd/man4/dummynet.4 3.html')
| -rw-r--r-- | static/freebsd/man4/dummynet.4 3.html | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/static/freebsd/man4/dummynet.4 3.html b/static/freebsd/man4/dummynet.4 3.html new file mode 100644 index 00000000..9bc4c22d --- /dev/null +++ b/static/freebsd/man4/dummynet.4 3.html @@ -0,0 +1,81 @@ +<table class="head"> + <tr> + <td class="head-ltitle">DUMMYNET(4)</td> + <td class="head-vol">Device Drivers Manual</td> + <td class="head-rtitle">DUMMYNET(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">dummynet</code> — <span class="Nd">traffic + shaper, bandwidth manager and delay emulator</span></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> +<p class="Pp">The <code class="Nm">dummynet</code> system facility permits the + control of traffic going through the various network interfaces, by applying + bandwidth and queue size limitations, implementing different scheduling and + queue management policies, and emulating delays and losses.</p> +<p class="Pp">The user interface for <code class="Nm">dummynet</code> is + implemented by the <a class="Xr">dnctl(8)</a> utility, so please refer to + the <a class="Xr">dnctl(8)</a> manpage for a complete description of the + <code class="Nm">dummynet</code> capabilities and how to use it.</p> +<section class="Ss"> +<h2 class="Ss" id="Kernel_Options"><a class="permalink" href="#Kernel_Options">Kernel + Options</a></h2> +<p class="Pp">The following options in the kernel configuration file are related + to <code class="Nm">dummynet</code> operation:</p> +<p class="Pp"></p> +<div class="Bd-indent"> +<dl class="Bl-tag Bl-compact"> + <dt id="IPFIREWALL"><a class="permalink" href="#IPFIREWALL"><code class="Dv">IPFIREWALL</code></a></dt> + <dd>enable ipfirewall (if <code class="Nm">dummynet</code> is to be used with + ipfw)</dd> + <dt id="IPFIREWALL_VERBOSE"><a class="permalink" href="#IPFIREWALL_VERBOSE"><code class="Dv">IPFIREWALL_VERBOSE</code></a></dt> + <dd>enable firewall output</dd> + <dt id="IPFIREWALL_VERBOSE_LIMIT"><a class="permalink" href="#IPFIREWALL_VERBOSE_LIMIT"><code class="Dv">IPFIREWALL_VERBOSE_LIMIT</code></a></dt> + <dd>limit firewall output</dd> + <dt id="DUMMYNET"><a class="permalink" href="#DUMMYNET"><code class="Dv">DUMMYNET</code></a></dt> + <dd>enable <code class="Nm">dummynet</code> operation</dd> + <dt id="HZ"><a class="permalink" href="#HZ"><code class="Dv">HZ</code></a></dt> + <dd>set the timer granularity</dd> +</dl> +</div> +<p class="Pp">Generally, the following options are required:</p> +<div class="Bd Pp Bd-indent Li"> +<pre>options IPFIREWALL +options DUMMYNET +options HZ=1000 # strongly recommended</pre> +</div> +<p class="Pp">Additionally, one may want to increase the number of mbuf clusters + (used to store network packets) according to the sum of the bandwidth-delay + products and queue sizes of all configured pipes.</p> +</section> +</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">setsockopt(2)</a>, <a class="Xr">if_bridge(4)</a>, + <a class="Xr">ip(4)</a>, <a class="Xr">pf.conf(5)</a>, + <a class="Xr">dnctl(8)</a>, <a class="Xr">ipfw(8)</a>, + <a class="Xr">sysctl(8)</a></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1> +<p class="Pp">The <code class="Nm">dummynet</code> facility was initially + implemented as a testing tool for TCP congestion control by + <span class="An">Luigi Rizzo</span> + <<a class="Mt" href="mailto:luigi@iet.unipi.it">luigi@iet.unipi.it</a>>, + as described on ACM Computer Communication Review, Jan.97 issue. Later it + has been modified to work at the IP and bridging levels, integrated with the + <a class="Xr">ipfw(4)</a> packet filter, and extended to support multiple + queueing and scheduling policies.</p> +</section> +</div> +<table class="foot"> + <tr> + <td class="foot-date">September 10, 2021</td> + <td class="foot-os">FreeBSD 15.0</td> + </tr> +</table> |