diff --git a/xos/vepc.xproto b/xos/vepc.xproto
index d678975..451c9a4 100644
--- a/xos/vepc.xproto
+++ b/xos/vepc.xproto
@@ -11,8 +11,9 @@
     required manytoone site->Site:+ = 2 [help_text = "Site of the EPC Service", null = False, db_index = True, blank = False];
     required string blueprint = 3 [help_text = "Select the service graph blueprint", db_index = False, default = 1, choices = "(('build', 'MCORD 4.1'),('mcord_5', 'MCORD 5'))"];
 
-    optional string enodeb_ip_addr = 4 [help_text = "external eNodeB IP address (for 5.0)", default = "127.0.0.1", max_length = 32, null = True, db_index = False, blank = True];
-    optional string enodeb_mac_addr = 5 [help_text = "external eNodeB MAC address (for 5.0)", default = "11:11:11:11:11:11", max_length = 32, null = True, db_index = False, blank = True];
-    optional string appserver_ip_addr = 6 [help_text = "external app server IP address (for 5.0)", default = "127.0.0.1", max_length = 32, null = True, db_index = False, blank = True];
-    optional string appserver_mac_addr = 7 [help_text = "external app server MAC address (for 5.0)", default = "11:11:11:11:11:11", max_length = 32, null = True, db_index = False, blank = True];
+    optional string enodeb_ip_addr_s1mme = 4 [help_text = "external eNodeB IP address of S1-MME (for 5.0)", default = "118.0.0.10", max_length = 32, null = True, db_index = False, blank = True];
+    optional string enodeb_ip_addr_s1u = 5 [help_text = "external eNodeB IP address of S1U (for 5.0)", default = "119.0.0.10", max_length = 32, null = True, db_index = False, blank = True];
+    optional string enodeb_mac_addr_s1u = 6 [help_text = "external eNodeB MAC address of S1U (for 5.0)", default = "00:ad:de:00:00:80", max_length = 32, null = True, db_index = False, blank = True];
+    optional string appserver_ip_addr = 7 [help_text = "external app server IP address (for 5.0)", default = "127.0.0.1", max_length = 32, null = True, db_index = False, blank = True];
+    optional string appserver_mac_addr = 8 [help_text = "external app server MAC address (for 5.0)", default = "11:11:11:11:11:11", max_length = 32, null = True, db_index = False, blank = True];
 }