diff --git a/TestON/tests/USECASE_SdnipFunction_fsfw/Dependency/USECASE_SdnipI2MN.py b/TestON/tests/USECASE_SdnipFunction_fsfw/Dependency/USECASE_SdnipI2MN.py
index c3e4321..cfe9b7e 100755
--- a/TestON/tests/USECASE_SdnipFunction_fsfw/Dependency/USECASE_SdnipI2MN.py
+++ b/TestON/tests/USECASE_SdnipFunction_fsfw/Dependency/USECASE_SdnipI2MN.py
@@ -301,14 +301,17 @@
     pr64514.setMAC( '00:00:00:00:00:04', 'pr64514-eth0' )
     pr64514.cmd( "sudo vconfig add pr64514-eth0 %s" % vlanId )
     pr64514.cmd( "ip addr add 10.0.4.1/24 dev pr64514-eth0.%s" % vlanId )
+    pr64514.defaultIntf().setMAC( '00:00:00:00:00:04' )
 
     pr64515.setMAC( '00:00:00:00:00:05', 'pr64515-eth0' )
     pr64515.cmd( "sudo vconfig add pr64515-eth0 %s" % vlanId )
-    pr64515.cmd( "ip addr add 10.0.5.1/24 dev pr64515-eth0.%d" % vlanId )
+    pr64515.cmd( "ip addr add 10.0.5.1/24 dev pr64515-eth0.%s" % vlanId )
+    pr64515.defaultIntf().setMAC( '00:00:00:00:00:05' )
 
     pr64516.setMAC( '00:00:00:00:00:06', 'pr64516-eth0' )
-    pr64516.cmd( "sudo vconfig add pr64516-eth0 %d" % vlanId )
-    pr64516.cmd( "ip addr add 10.0.6.1/24 dev pr64516-eth0.%d" % vlanId )
+    pr64516.cmd( "sudo vconfig add pr64516-eth0 %s" % vlanId )
+    pr64516.cmd( "ip addr add 10.0.6.1/24 dev pr64516-eth0.%s" % vlanId )
+    pr64516.defaultIntf().setMAC( '00:00:00:00:00:06' )
 
     # setup configuration on the interface connected to hosts
     pr64514.setIP( "4.0.0.254", 8, "pr64514-eth1" )