Commit bb092846 authored by Leigh B. Stoller's avatar Leigh B. Stoller
Browse files

Add blurb about minimum delay threshold (3ms), and pointer from main

tutorial into the nscommands file on said topic.
Also some minor page format fixes.
parent 366c297a
......@@ -354,7 +354,7 @@ tb-set-node-cmdline $node0 {???}
<p>Notes:
<ul>
<li>Set the command line, to be passed to the <i>kernel<i> when it
<li>Set the command line, to be passed to the <i>kernel</i> when it
is booted.
<li>Currently, this is supported on OSKit kernels only.
</ul>
......@@ -466,6 +466,8 @@ tb-set-node-lan-delay $lan0 $node0 40ms
<code>make-lan</code>.
<li>The behavior of this command is not defined when used with nodes
that are in the same LAN multiple times.
<li>Delays of less than 3ms (per trip) are too small to be
accurately modeled at this time, and will be silently ignored.
</ul>
<h4>tb-set-node-lan-bandwidth</h4>
......@@ -521,8 +523,8 @@ tb-set-node-lan-loss $lan0 $node0 0.05
<code>(1-(1-<var>A</var>)(1-<var>B</var>))</code>.
<li>If this command is not used to overwrite the loss, then the
loss for a given node to switch link is taken from the loss rate
passed to the <code>make-lan<code> command. If a loss rate of
<var>L</var> is passed to <code>make-lan<code> then the node to
passed to the <code>make-lan</code> command. If a loss rate of
<var>L</var> is passed to <code>make-lan</code> then the node to
switch loss rate for each node is set to
<code>(1-sqrt(1-<var>L</var>))</code>. Thus as each packet will
have two such chances to be lost the node to loss rate comes out
......
......@@ -4,7 +4,7 @@
<link rel='stylesheet' href='../tbstyle-plain.css' type='text/css'>
</head>
<body>
<basefont size=4>
<center>
<h1>Emulab Tutorial</h1>
......@@ -66,8 +66,8 @@ images on your nodes.
</ul>
<ul>
<li> <a NAME="LoggingIn"></a>
<h3>Logging Into the Web Interface</h3>
<a NAME="LoggingIn"></a>
<li> <h3>Logging Into the Web Interface</h3>
<p>
If you already have an account on the Testbed, all you need to do is
......@@ -243,6 +243,15 @@ A few points should be noted:
perspective, except for the fact that it adds latency, error,
or reduced bandwidth.
<p>
<li> Delays of less than 3ms (per trip) are too small to be
accurately modeled at this time, and will be silently ignored.
Please see the
<a href="../docwrapper.php3?docname=tutorial/nscommands.html#LOSS">
<i>Link Loss Commands</i></a> section in the
<a href="../docwrapper.php3?docname=tutorial/nscommands.html">
Extensions</a> reference.
<p>
<li> The names in the "Qualified Name" column refer to the control
network interfaces for each of your allocated nodes. These names
are added to the Emulab nameserver map on the fly, and are
......
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