diff --git a/samples/subscriber.yaml b/samples/subscriber.yaml
index 915a8dd..ba79a16 100644
--- a/samples/subscriber.yaml
+++ b/samples/subscriber.yaml
@@ -37,6 +37,9 @@
         device_type: simulated_olt
         host: 172.17.0.1
         port: 50060
+        switch_datapath_id: of:0000000ce2314000
+        switch_port: "5"
+        outer_tpid: "0x8100"
       requirements:
         - volt_service:
             node: service#volt
@@ -66,5 +69,5 @@
         olt_device: volt-1
         olt_port: volt-port-1
         uni_port_id: 101
-#        ip_address: 10.8.2.1
-#        switch_datapath_id: of:0000000ce2314000
+        mac_address: 00:AA:00:00:00:01
+        ip_address: 10.8.2.1
diff --git a/xos/synchronizer/models/volt.xproto b/xos/synchronizer/models/volt.xproto
index 8e927a4..aa2518d 100644
--- a/xos/synchronizer/models/volt.xproto
+++ b/xos/synchronizer/models/volt.xproto
@@ -41,6 +41,10 @@
 
     required string uplink = 15 [default="129", help_text = "uplink port", null = False, db_index = False, blank = False];
     required string driver = 16 [default="pmc-olt", help_text = "Olt driver", null = True, db_index = False, blank = False];
+
+    optional string switch_datapath_id = 17 [help_text = "Fabric switch to which the OLT is connected", null = False, db_index = False, blank = False];
+    optional string switch_port = 18 [help_text = "Fabric port to which the OLT is connected", null = False, db_index = False, blank = False];
+    optional string outer_tpid = 19 [help_text = "Outer VLAN id field EtherType", null = False, db_index = False, blank = False];
 }
 
 message ONUDevice (XOSBase){