diff --git a/src/mpMultiInterfaceCongConfig.py b/src/mpMultiInterfaceCongConfig.py
index ec59632..26c6c52 100644
--- a/src/mpMultiInterfaceCongConfig.py
+++ b/src/mpMultiInterfaceCongConfig.py
@@ -184,7 +184,7 @@ class MpMultiInterfaceCongConfig(MpConfig):
 		return  MpTopo.clientName + "-eth" + str(interfaceID)
 
 	def getCongClientInterface(self, interfaceID):
-		return MpMultiInterfaceCongTopo.congClientName + "-" + str(interfaceID) + "-eth0"
+		return MpMultiInterfaceCongTopo.congClientName + str(interfaceID) + "-eth0"
 
 	def getRouterInterfaceSwitch(self, interfaceID):
 		return  MpTopo.routerName + "-eth" + str(interfaceID)
@@ -193,7 +193,7 @@ class MpMultiInterfaceCongConfig(MpConfig):
 		return  MpTopo.serverName + "-eth0"
 
 	def getCongServerInterface(self, interfaceID):
-		return MpMultiInterfaceCongTopo.congServerName + "-" + str(interfaceID) + "-eth0"
+		return MpMultiInterfaceCongTopo.congServerName + str(interfaceID) + "-eth0"
 
 	def getMidLeftName(self, id):
 		return MpTopo.switchNamePrefix + str(id)
diff --git a/src/mpMultiInterfaceCongTopo.py b/src/mpMultiInterfaceCongTopo.py
index ccd5853..dd7812f 100644
--- a/src/mpMultiInterfaceCongTopo.py
+++ b/src/mpMultiInterfaceCongTopo.py
@@ -16,12 +16,12 @@ class MpMultiInterfaceCongTopo(MpTopo):
 		for l in self.topoParam.linkCharacteristics:
 			self.switch.append(self.addOneSwitchPerLink(l))
 			self.addLink(self.client,self.switch[-1])
-			self.cong_clients.append(self.addHost(MpMultiInterfaceCongTopo.congClientName + "-" + str(len(self.cong_clients))))
+			self.cong_clients.append(self.addHost(MpMultiInterfaceCongTopo.congClientName + str(len(self.cong_clients))))
 			self.addLink(self.cong_clients[-1], self.switch[-1])
 			self.addLink(self.switch[-1],self.router, **l.asDict())
 		self.addLink(self.router, self.server)
 		for i in range(len(self.cong_clients)):
-			self.cong_servers.append(self.addHost(MpMultiInterfaceCongTopo.congServerName + "-" + str(len(self.cong_servers))))
+			self.cong_servers.append(self.addHost(MpMultiInterfaceCongTopo.congServerName + str(len(self.cong_servers))))
 			self.addLink(self.router, self.cong_servers[-1])
 
 	def getCongClients(self):