diff --git a/src/conf/xp/0_iperf_1 b/src/conf/xp/0_iperf_1
new file mode 100644
index 0000000..291e197
--- /dev/null
+++ b/src/conf/xp/0_iperf_1
@@ -0,0 +1,9 @@
+#option to dvlp are commented but already there.
+#kCommit:aaaa
+#pmCommit:bbb
+#sysctl:mem,x y z
+#sysctl:rmem,x y z
+#sysctl:wmem,x y z
+xpType:iperf
+size:10M
+
diff --git a/src/mpPerf.py b/src/mpPerf.py
index 7e24353..2241a49 100755
--- a/src/mpPerf.py
+++ b/src/mpPerf.py
@@ -1,21 +1,21 @@
 #!/usr/bin/python
 
 import sys, getopt
-from mpParamTopo import MpParamTopo
-from mpMultiInterfaceTopo import MpMultiInterfaceTopo
-from mpMultiInterfaceConfig import MpMultiInterfaceConfig
-from mpMininetBuilder import MpMininetBuilder
+from mpXpRunner import MpXpRunner
+from mpTopo import MpTopo
 
 topoParamFile = None
-topoType      = "mininet"
+xpParamFile   = None
+topoBuilder   = "mininet"
 
 def printHelp():
 	print("Help Menu")
 
 def parseArgs(argv):
 	global topoParamFile
+	global xpParamFile
 	try:
-		opts, args = getopt.getopt(argv, "hf:", ["topoParam="])
+		opts, args = getopt.getopt(argv, "ht:x:", ["topoParam=","xp="])
 	except getopt.GetoptError:
 		printHelp()
 		sys.exit(1)
@@ -23,28 +23,16 @@ def parseArgs(argv):
 		if opt == "-h":
 			printHelp()
 			sys.exit(1)
-		elif opt in ("-f","--topoParam"):
-			print("hllo", arg);
+		elif opt in ("-x","--xp"):
+			xpParamFile = arg
+		elif opt in ("-t","--topoParam"):
+			print("hey")
 			topoParamFile = arg
-
-
+	if topoParamFile is None:
+		print("Missing the topo...")
+		printHelp()
+		sys.exit(1)
 
 if __name__ == '__main__':
 	parseArgs(sys.argv[1:])
-	if topoParamFile is None:
-		print("Use command line param")
-	else:
-		param = MpParamTopo(topoParamFile)
-
-	if topoType == "mininet":
-		if param.getParam('topoType') == "MultiIf":
-			mpTopo = MpMultiInterfaceTopo(MpMininetBuilder(), param)
-			mpConfig = MpMultiInterfaceConfig(mpTopo, param)
-			mpTopo.startNetwork()
-			mpConfig.configureNetwork()
-			mpConfig.pingAllFromClient()
-			mpTopo.getCLI()
-			mpTopo.stopNetwork()
-	else:
-		print("Unrecognized topo type")
-	print(mpTopo)
+	MpXpRunner(MpTopo.mininetBuilder, topoParamFile, xpParamFile)
diff --git a/src/mpTopo.py b/src/mpTopo.py
index 0e454e9..3581ff3 100644
--- a/src/mpTopo.py
+++ b/src/mpTopo.py
@@ -1,4 +1,7 @@
 class MpTopo:
+	mininetBuilder = "mininet"
+	multiIfTopo = "MultiIf"
+	topoAttr    = "topoType"
 	switchNamePrefix = "s"
 	clientName = "Client"
 	serverName = "Server"
diff --git a/src/mpXpRunner.py b/src/mpXpRunner.py
new file mode 100644
index 0000000..c3f0423
--- /dev/null
+++ b/src/mpXpRunner.py
@@ -0,0 +1,48 @@
+from mpTopo import MpTopo
+from mpParamTopo import MpParamTopo
+from mpMultiInterfaceTopo import MpMultiInterfaceTopo
+from mpMultiInterfaceConfig import MpMultiInterfaceConfig
+from mpMininetBuilder import MpMininetBuilder
+
+class MpXpRunner:
+	def __init__(self, builderType, topoParamFile, xpParamFile):
+		self.topoParam = MpParamTopo(topoParamFile)
+		self.defBuilder(builderType)
+		self.defTopo()
+		self.defConfig()
+		self.startTopo()
+		self.runXp(xpParamFile)
+		self.stopTopo()
+		
+	def defBuilder(self, builderType):
+		if builderType == MpTopo.mininetBuilder:
+			self.topoBuilder = MpMininetBuilder()
+		else:
+			raise Exception("I can not find the builder " + 
+					builderType)
+	def defTopo(self):
+		t = self.topoParam.getParam(MpTopo.topoAttr)
+		if t == MpTopo.multiIfTopo:
+			self.mpTopo = MpMultiInterfaceTopo(self.topoBuilder,
+					self.topoParam)
+		else:
+			raise Exception("Unfound Topo" + t)
+		print(self.mpTopo)
+
+	def defConfig(self):
+		self.mpTopoConfig = MpMultiInterfaceConfig(self.mpTopo,
+				self.topoParam)
+
+	def startTopo(self):
+		self.mpTopo.startNetwork()
+		self.mpTopoConfig.configureNetwork()
+
+	def runXp(self, xpParamFile):
+		if xpParamFile is None:
+			self.mpTopoConfig.pingAllFromClient()
+			self.mpTopo.getCLI()
+		else:
+			raise Exception("TODO")
+	
+	def stopTopo(self):
+		self.mpTopo.stopNetwork()