Changes between Version 2 and Version 3 of FeddUsersGuide

Timestamp:

May 7, 2014 4:34:54 PM (10 years ago)

Author:

faber

Comment:

--

FeddUsersGuide

@@ -7 +7 @@
 == Creating A Federated Experiment ==
 
+We start by creating an experiment with the layout shown here:
+
+[[Image(federation1.png)]]
+
+Each square is a computer and each line a link.  The layout is a simple dumbbell with nodes a and c as the ends of the inner "bar" and b, d, e, and f as the leaves.  Nodes a, b, and d are in one testbed and c, e, f and f in another.
+
+The following ns2 file is a description for such a topology:
+
+{{{
+# Simple federated topology, all on DETER
+#
+# SERVICE: project_export:deter/exp1::project=TIED
+# SERVICE: project_export:deter/exp2::project=TIED
+#
+
+set ns [new Simulator]
+source tb_compat.tcl
+
+set a [$ns node]
+set b [$ns node]
+set c [$ns node]
+set d [$ns node]
+set e [$ns node]
+set f [$ns node]
+tb-set-node-testbed $a "deter/exp1"
+tb-set-node-testbed $b "deter/exp1"
+tb-set-node-testbed $c "deter/exp2"
+tb-set-node-testbed $d "deter/exp1"
+tb-set-node-testbed $e "deter/exp2"
+tb-set-node-testbed $f "deter/exp2"
+
+
+set link0 [ $ns duplex-link $a $b 1Gb 0ms DropTail]
+set link1 [ $ns duplex-link $a $c 1Gb 0ms DropTail]
+set link2 [ $ns duplex-link $a $d 1Gb 0ms DropTail]
+set link3 [ $ns duplex-link $e $c 1Gb 0ms DropTail]
+set link4 [ $ns duplex-link $f $c 1Gb 0ms DropTail]
+
+$ns rtproto Static
+$ns run
+}}}
+
+A [attachment:federation1.tcl copy of that file] is attached to this page.
+
+Most of that file looks like any other simple DETERLab experiment layout, and one can swap it in on DETERLab directly and get a single experiment.  The differences are
+
+ * The assignments of nodes to testbeds using {{{tb-set-node-testbed}}}
+ * The assignments of projects within a testbed by the {{{SERVICE}}} directives in the comments
+