diff --git a/c_gen/c_code_gen.py b/c_gen/c_code_gen.py
index 6556d3b..484e941 100644
--- a/c_gen/c_code_gen.py
+++ b/c_gen/c_code_gen.py
@@ -653,6 +653,7 @@
 
 /* Currently these are categorized as scalars */
 typedef char of_port_name_t[OF_MAX_PORT_NAME_LEN];
+typedef char of_app_code_t[OF_APP_CODE_LEN];
 typedef char of_table_name_t[OF_MAX_TABLE_NAME_LEN];
 typedef char of_desc_str_t[OF_DESC_STR_LEN];
 typedef char of_serial_num_t[OF_SERIAL_NUM_LEN];
diff --git a/c_gen/c_test_gen.py b/c_gen/c_test_gen.py
index 9b70e52..8cd73c5 100644
--- a/c_gen/c_test_gen.py
+++ b/c_gen/c_test_gen.py
@@ -106,7 +106,10 @@
         of_bitmap_128_t="bitmap_128",
         of_checksum_128_t="checksum_128",
 	#Circuit extensions
-        oxm_of_och_sig_id_t="sig_id",		
+        oxm_of_och_sig_id_t="sig_id",
+        of_app_code_t="app_code",
+        #of_port_optical_transport_application_code_t="tappcode",
+        of_port_desc_prop_optical_transport_t="desc1",		
         )
 
     if m_type.find("of_list_") == 0:
@@ -121,7 +124,7 @@
 string_types = [ "of_port_name_t", "of_table_name_t",
                 "of_desc_str_t", "of_serial_num_t", "of_mac_addr_t",
                 "of_ipv6_t", "of_bitmap_128_t", "of_checksum_128_t",
-                "of_str64_t"]
+                "of_str64_t","of_app_code_t"]
 
 scalar_types = integer_types[:]
 scalar_types.extend(string_types)
diff --git a/c_gen/of_g_legacy.py b/c_gen/of_g_legacy.py
index b58ca08..c0267ca 100644
--- a/c_gen/of_g_legacy.py
+++ b/c_gen/of_g_legacy.py
@@ -87,7 +87,8 @@
     OF_MAX_PORT_NAME_LEN  = 16,
     OF_ETH_ALEN = 6,
     OF_DESC_STR_LEN   = 256,
-    OF_SERIAL_NUM_LEN = 32
+    OF_SERIAL_NUM_LEN = 32,
+    OF_APP_CODE_LEN = 15, 	
 )
 
 ## List of mixed data types
@@ -208,6 +209,9 @@
     of_octets_t = dict(bytes=-1, short_name="octets"),
     of_bitmap_128_t = dict(bytes=16, short_name="bitmap_128"),
     of_checksum_128_t = dict(bytes=16, short_name="checksum_128"),
+    of_app_code_t = dict(bytes=ofp_constants["OF_APP_CODE_LEN"],
+                          short_name="app_code"),
+
 )
 
 of_scalar_types = ["char", "uint8_t", "uint16_t", "uint32_t", "uint64_t",
diff --git a/java_gen/java_type.py b/java_gen/java_type.py
index 12d6260..6b97f69 100644
--- a/java_gen/java_type.py
+++ b/java_gen/java_type.py
@@ -352,6 +352,7 @@
             default="MacAddress.NONE")
 
 port_name = gen_fixed_length_string_jtype(16)
+app_code = gen_fixed_length_string_jtype(15)
 desc_str = gen_fixed_length_string_jtype(256)
 serial_num = gen_fixed_length_string_jtype(32)
 table_name = gen_fixed_length_string_jtype(32)
@@ -549,6 +550,7 @@
         'of_bitmap_128_t': port_bitmap,
         'of_checksum_128_t': u128,
         'of_bsn_vport_t': bsn_vport,
+        'of_app_code_t': app_code,  
         }
 
 ## Map that defines exceptions from the standard loxi->java mapping scheme
diff --git a/loxi_ir/ir_offset.py b/loxi_ir/ir_offset.py
index 9c6a5c1..2d5c71c 100644
--- a/loxi_ir/ir_offset.py
+++ b/loxi_ir/ir_offset.py
@@ -25,7 +25,8 @@
     OF_MAX_PORT_NAME_LEN  = 16,
     OF_ETH_ALEN = 6,
     OF_DESC_STR_LEN   = 256,
-    OF_SERIAL_NUM_LEN = 32
+    OF_SERIAL_NUM_LEN = 32,
+    OF_APP_CODE_LEN = 15 	
 )
 
 
@@ -102,6 +103,7 @@
     of_octets_t = (0, False),
     of_bitmap_128_t = (16, True),
     of_checksum_128_t = (16, True),
+    of_app_code_t = (15,True),
 )
 
 def type_dec_to_count_base(m_type):
diff --git a/openflow_input/circuit b/openflow_input/circuit
index 9377d6d..87be023 100644
--- a/openflow_input/circuit
+++ b/openflow_input/circuit
@@ -79,6 +79,7 @@
     	
 };
 
+
 struct of_circuit_ports_request : of_experimenter_stats_request {
     uint8_t version;
     uint8_t type == 18;
@@ -87,10 +88,11 @@
     uint16_t stats_type == 0xffff;
     enum ofp_stats_request_flags flags;
     pad(4);
-    uint32_t experimenter == 0x5c16c8;
-    uint32_t subtype == 15;
+    uint32_t experimenter == 0x748771;
+    uint32_t subtype == 13;
 };
 
+
 struct of_circuit_ports_reply : of_experimenter_stats_reply {
     uint8_t version;
     uint8_t type == 19;
@@ -99,6 +101,53 @@
     uint16_t stats_type == 0xffff;
     enum ofp_stats_reply_flags flags;
     pad(4);
-    uint32_t experimenter == 0x5c16c8;
-    uint32_t subtype == ?;
+    uint32_t experimenter == 0x748771;
+    uint32_t subtype == 13;
+    list(of_port_optical_t) entries;	
 };
+
+
+struct of_port_optical {
+    of_port_no_t port_no;
+    uint16_t length;
+    pad(2);
+    of_mac_addr_t hw_addr;
+    pad(2);
+    of_port_name_t name;
+    enum ofp_port_config config;
+    enum ofp_port_state state;
+    list(of_port_desc_prop_optical_transport_t) desc; 					
+};
+
+struct of_port_desc_prop_optical_transport {
+   uint16_t type; 
+   uint16_t length;
+   uint8_t port_signal_type; 
+   uint8_t reserved;
+   pad(2);
+};
+
+struct of_port_optical_transport_application_code 
+{
+   uint16_t feature_type; 
+   uint8_t oic_type; 
+   of_app_code_t app_code;
+};
+
+
+struct of_port_optical_transport_layer_entry {
+   uint8_t layer_class; 
+   uint8_t signal_type;
+   uint8_t adaptation;
+   pad(5);
+};
+
+
+/* ODU Layer Stack Feature Encoding */
+struct of_port_optical_transport_layer_stack {
+   uint16_t feature_type; 
+   uint16_t length; 
+   pad(4); 
+   list(of_port_optical_transport_layer_entry_t) entries; 
+};
+