diff --git a/RO-SDN-juniper_contrail/osm_rosdn_juniper_contrail/sdn_api.py b/RO-SDN-juniper_contrail/osm_rosdn_juniper_contrail/sdn_api.py
index c8cca22..6ef91af 100644
--- a/RO-SDN-juniper_contrail/osm_rosdn_juniper_contrail/sdn_api.py
+++ b/RO-SDN-juniper_contrail/osm_rosdn_juniper_contrail/sdn_api.py
@@ -148,10 +148,10 @@
 
     # Aux methods to avoid code duplication of name conventions
     def get_vpg_name(self, switch_id, switch_port):
-        return "{}_{}".format(switch_id, switch_port)
+        return "{}_{}".format(switch_id, switch_port).replace(":","_")
 
     def get_vmi_name(self, switch_id, switch_port, vlan):
-        return "{}_{}-{}".format(switch_id, switch_port, vlan)
+        return "{}_{}-{}".format(switch_id, switch_port, vlan).replace(":","_")
 
     # Virtual network operations