Adding fractal mininet topo and domain config json

Change-Id: I26bb6f2351e11d28a4cbfb141e98958be1d4c90b

+{
+  "domains" : {
+    "domain1" : {
+      "basic" : {
+        "name" : "Domain 1",
+        "applicationName" : "org.onosproject.meshdomain",
+        "internalDevices" : [ "of:0000000000001001", "of:0000000000001002", "of:0000000000001003" ],
+        "edgePorts" : [ "of:0000000000010000/1", "of:0000000003010000/2", "of:0000000002010000/1" ]
+      }
+    },
+    "domain2" : {
+      "basic" : {
+        "name" : "Domain 2",
+        "applicationName" : "org.onosproject.meshdomain",
+        "internalDevices" : [ "of:0000000000002001", "of:0000000000002002", "of:0000000000002003" ],
+        "edgePorts" : [ "of:0000000000020000/1", "of:0000000003020000/1", "of:0000000002010000/2" ]
+      }
+    },
+    "domain3" : {
+      "basic" : {
+        "name" : "Domain 3",
+        "applicationName" : "org.onosproject.meshdomain",
+        "internalDevices" : [ "of:0000000000003001", "of:0000000000003002", "of:0000000000003003" ],
+        "edgePorts" : [ "of:0000000000030000/1", "of:0000000003010000/1", "of:0000000003020000/2" ]
+      }
+    }
+  }
+}
\ No newline at end of file

+#!/usr/bin/env python
+
+from mininet.topo import Topo
+
+class FractalTopo( Topo ):
+    def build( self, n=3, h=2 ):
+
+        clusters = []
+        for i in range( 1, n+1 ):
+            clusterSws = []
+            # create switches in cluster
+            for j in range( 1, n+1 ):
+                id = i * 1000 + j
+                sw = self.addSwitch('s%d' % id, dpid=str(id).zfill(16))
+                [ self.addLink(s, sw) for s in clusterSws ]
+                clusterSws.append(sw)
+            clusters.append(clusterSws)
+
+        for i in range( 1, n+1 ):
+            # create the edge switch
+            id = i * 10000
+            sw = self.addSwitch('s%d' % id, dpid=str(id).zfill(16))
+            self.addLink(clusters[i-1].pop(0), sw)
+            for j in range( 1, h+1 ):
+                id = i * 1000 + j
+                host = self.addHost( 'h%d' % id )
+                self.addLink( host, sw )
+
+        for i in range( 1, n+1 ):
+            # connect the clusters
+            if i == n:
+                id = n * 1000000 + 10000
+                sw = self.addSwitch('s%d' % id, dpid=str(id).zfill(16))
+                self.addLink(clusters[i-1].pop(0), sw)
+                self.addLink(clusters[0].pop(0), sw)
+
+            else:
+                id = (i+1) * 1000000 + i * 10000
+                sw = self.addSwitch('s%d' % id, dpid=str(id).zfill(16))
+                self.addLink(clusters[i-1].pop(0), sw)
+                self.addLink(clusters[i].pop(0), sw)
+
+
+topos = { 'fractal': FractalTopo }
+
+def run():
+    topo = FractalTopo()
+    net = Mininet( topo=topo, controller=RemoteController, autoSetMacs=True )
+    net.start()
+    CLI( net )
+    net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    run()
+