diff --git a/c_gen/c_test_gen.py b/c_gen/c_test_gen.py
index 8cd73c5..2f93536 100644
--- a/c_gen/c_test_gen.py
+++ b/c_gen/c_test_gen.py
@@ -106,10 +106,8 @@
         of_bitmap_128_t="bitmap_128",
         of_checksum_128_t="checksum_128",
 	#Circuit extensions
-        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",		
+	of_sig_id_t="sig_id",
         )
 
     if m_type.find("of_list_") == 0:
diff --git a/c_gen/of_g_legacy.py b/c_gen/of_g_legacy.py
index c0267ca..0c48edd 100644
--- a/c_gen/of_g_legacy.py
+++ b/c_gen/of_g_legacy.py
@@ -89,6 +89,7 @@
     OF_DESC_STR_LEN   = 256,
     OF_SERIAL_NUM_LEN = 32,
     OF_APP_CODE_LEN = 15, 	
+    OF_SIGID_LEN=6, 	
 )
 
 ## List of mixed data types
@@ -211,7 +212,8 @@
     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_sig_id_t = dict(bytes=ofp_constants["OF_SIGID_LEN"],
+                          short_name="sig_id"),
 )
 
 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 6b97f69..5ff987d 100644
--- a/java_gen/java_type.py
+++ b/java_gen/java_type.py
@@ -492,6 +492,9 @@
          .op(read="OFBufferId.of(bb.readInt())", write="bb.writeInt($name.getInt())", default="OFBufferId.NO_BUFFER")
 lag_id = JType("LagId") \
          .op(version=ANY, read="LagId.read4Bytes(bb)", write="$name.write4Bytes(bb)", default="LagId.NONE")
+
+sig_id = JType("CircuitSignalID") \
+         .op(version=ANY, read="CircuitSignalID.read6Bytes(bb)", write="$name.write6Bytes(bb)", default="CircuitSignalID.NONE")
 vrf = JType("VRF") \
          .op(version=ANY, read="VRF.read4Bytes(bb)", write="$name.write4Bytes(bb)", default="VRF.ZERO")
 class_id = JType("ClassId") \
@@ -551,6 +554,7 @@
         'of_checksum_128_t': u128,
         'of_bsn_vport_t': bsn_vport,
         'of_app_code_t': app_code,  
+        'of_sig_id_t': sig_id,
         }
 
 ## Map that defines exceptions from the standard loxi->java mapping scheme
@@ -698,6 +702,10 @@
         'of_bsn_log': { 'data': var_string },
 
         'of_features_reply' : { 'auxiliary_id' : of_aux_id},
+        'of_oxm_och_sigtype' : { 'value' : u8obj },
+        'of_oxm_och_sigtype_basic' : { 'value' : u8obj },
+	'of_oxm_och_sigid' : {'value' : sig_id},
+	'of_oxm_och_sigid_basic' : {'value' : sig_id},  
 }
 
 
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
index 1acc1a2..01a1fa5 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchField.java
@@ -27,6 +27,7 @@
 import org.projectfloodlight.openflow.types.UDF;
 import org.projectfloodlight.openflow.types.VRF;
 import org.projectfloodlight.openflow.types.VlanPcp;
+import org.projectfloodlight.openflow.types.CircuitSignalID;
 
 @SuppressWarnings("unchecked")
 public class MatchField<F extends OFValueType<F>> {
@@ -235,15 +236,24 @@
     public final static MatchField<ClassId> BSN_VLAN_XLATE_PORT_GROUP_ID =
             new MatchField<ClassId>("bsn_vlan_xlate_port_group_id", MatchFields.BSN_VLAN_XLATE_PORT_GROUP_ID);
 
-
-    public final static MatchField<U64> OCH_SIGID =
-            new MatchField<U64>("och_sigid",
+    
+    public final static MatchField<CircuitSignalID> OCH_SIGID =
+            new MatchField<CircuitSignalID>("och_sigid",
                                     MatchFields.OCH_SIGID);
 
-    public final static MatchField<U64> OCH_SIGTYPE =
-            new MatchField<U64>("och_sigid",
+    public final static MatchField<U8> OCH_SIGTYPE =
+            new MatchField<U8>("och_sigtype",
                                     MatchFields.OCH_SIGTYPE);
+    
+    public final static MatchField<CircuitSignalID> OCH_SIGID_BASIC =
+            new MatchField<CircuitSignalID>("och_sigid_basic",
+                                    MatchFields.OCH_SIGID);
 
+    public final static MatchField<U8> OCH_SIGTYPE_BASIC =
+            new MatchField<U8>("och_sigtype_basic",
+                                    MatchFields.OCH_SIGTYPE_BASIC);
+	 
+    
     public String getName() {
         return name;
     }
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
index 43a7785..ccf56b2 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/match/MatchFields.java
@@ -58,5 +58,8 @@
     BSN_TCP_FLAGS,
     BSN_VLAN_XLATE_PORT_GROUP_ID,
     OCH_SIGID,
-    OCH_SIGTYPE;
+    OCH_SIGTYPE,
+    OCH_SIGID_BASIC,
+    OCH_SIGTYPE_BASIC,
+;
 }
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/CircuitSignalID.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/CircuitSignalID.java
new file mode 100644
index 0000000..f347387
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/CircuitSignalID.java
@@ -0,0 +1,122 @@
+package org.projectfloodlight.openflow.types;
+
+import com.google.common.collect.ComparisonChain;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.projectfloodlight.openflow.exceptions.OFParseError;
+
+import com.google.common.hash.PrimitiveSink;
+
+
+public class CircuitSignalID implements OFValueType<CircuitSignalID> {
+    static final int length = 6;
+
+    private byte gridType;
+    private byte channelSpacing ;
+    private short channelNumber;
+    private short spectralWidth;
+
+    public static final CircuitSignalID NONE = new CircuitSignalID((byte)0,
+                                                                   (byte)0,
+                                                                   (short)0,
+                                                                   (short)0);
+
+
+    public CircuitSignalID(byte gridType, byte channelSpacing,
+                            short channelNumber,
+                            short spectralWidth)
+    {
+        this.gridType = gridType;
+        this.channelSpacing = channelSpacing;
+        this.channelNumber = channelNumber;
+        this.spectralWidth = spectralWidth;
+
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+    }
+
+
+    public void write6Bytes(ChannelBuffer c) {
+        c.writeByte(gridType);
+        c.writeByte(channelSpacing);
+        c.writeShort(channelNumber);
+        c.writeShort(spectralWidth);
+    }
+
+    public static CircuitSignalID read6Bytes(ChannelBuffer c) throws OFParseError {
+        return new CircuitSignalID((byte)c.readUnsignedByte(),
+                                   (byte)c.readUnsignedByte(),
+                                   (short)c.readUnsignedShort(),
+                                   (short)c.readUnsignedShort());
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        CircuitSignalID that = (CircuitSignalID) o;
+
+        if (channelNumber != that.channelNumber) return false;
+        if (channelSpacing != that.channelSpacing) return false;
+        if (gridType != that.gridType) return false;
+        if (spectralWidth != that.spectralWidth) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = (int) gridType;
+        result = 31 * result + (int) channelSpacing;
+        result = 31 * result + (int) channelNumber;
+        result = 31 * result + (int) spectralWidth;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "CircuitSignalID{" +
+                "gridType=" + gridType +
+                ", channelSpacing=" + channelSpacing +
+                ", channelNumber=" + channelNumber +
+                ", spectralWidth=" + spectralWidth +
+                '}';
+    }
+
+    @Override
+    public CircuitSignalID applyMask(CircuitSignalID mask) {
+        return new CircuitSignalID((byte) (this.gridType & mask.gridType),
+                                   (byte) (this.channelSpacing & mask
+                                           .channelSpacing),
+                                   (short) (this.channelNumber & mask
+                                           .channelNumber),
+                                   (short) (this.spectralWidth & mask
+                                           .spectralWidth));
+    }
+
+
+    @Override
+    public int compareTo(CircuitSignalID o) {
+        return ComparisonChain.start()
+                              .compare(gridType,o.gridType)
+                              .compare(channelSpacing,o.channelSpacing)
+                              .compare(channelNumber,o.channelNumber)
+                              .compare(spectralWidth,o.spectralWidth)
+                              .result();
+    }
+
+
+    @Override
+    public void putTo(PrimitiveSink sink) {
+        sink.putByte(gridType);
+        sink.putByte(channelSpacing);
+        sink.putShort(channelNumber);
+        sink.putShort(spectralWidth);
+    }
+
+
+
+}
diff --git a/java_gen/pre-written/src/test/java/org/projectfloodlight/protocol/match/MatchFieldIteration13Test.java b/java_gen/pre-written/src/test/java/org/projectfloodlight/protocol/match/MatchFieldIteration13Test.java
index 9656406..1bd3efe 100644
--- a/java_gen/pre-written/src/test/java/org/projectfloodlight/protocol/match/MatchFieldIteration13Test.java
+++ b/java_gen/pre-written/src/test/java/org/projectfloodlight/protocol/match/MatchFieldIteration13Test.java
@@ -5,7 +5,7 @@
 import org.projectfloodlight.openflow.protocol.OFVersion;
 import org.projectfloodlight.openflow.protocol.match.Match;
 import org.projectfloodlight.openflow.protocol.match.MatchField;
-import org.projectfloodlight.openflow.types.U64;
+import org.projectfloodlight.openflow.types.U8;
 
 public class MatchFieldIteration13Test extends MatchFieldIterationBase {
     public MatchFieldIteration13Test() {
@@ -16,7 +16,7 @@
     public void matchCircuitFields()
     {
         Match.Builder builder = factory.buildMatchV3().setExact(MatchField
-                                                                        .OCH_SIGTYPE, U64.ZERO);
+                                                                        .OCH_SIGTYPE, U8.ZERO);
 
     }
 }
diff --git a/loxi_ir/ir_offset.py b/loxi_ir/ir_offset.py
index 2d5c71c..1d66115 100644
--- a/loxi_ir/ir_offset.py
+++ b/loxi_ir/ir_offset.py
@@ -104,6 +104,7 @@
     of_bitmap_128_t = (16, True),
     of_checksum_128_t = (16, True),
     of_app_code_t = (15,True),
+    of_sig_id_t = (6, True),
 )
 
 def type_dec_to_count_base(m_type):
diff --git a/openflow_input/circuit b/openflow_input/circuit
index 87be023..01a1432 100644
--- a/openflow_input/circuit
+++ b/openflow_input/circuit
@@ -45,9 +45,8 @@
     OFPOCHT_FLEX_GRID      = 2,
 };
 
-
-struct oxm_of_och_sig_id {
-     
+// Not used .. just for info on structure.
+struct ofp_och_signal_id {
      uint8_t grid;            //Type of WDM grid - OFPGRIDT_*
      uint8_t cs;              //Channel Spacing - OFPCS_*
      uint16_t n;             // Used to calculate frequency as in [ITU G.694.1]
@@ -57,26 +56,35 @@
                             // For fix grid networks, m=1
 };
 
-// circuit extension message
-struct of_circuit_header : of_experimenter {
-    uint8_t version;
-    uint8_t type == 4;
-    uint16_t length;
-    uint32_t xid;
-    uint32_t experimenter == 0xffff;
-    uint32_t subtype == ?;
-    uint8_t sigtype;	
-    oxm_of_och_sig_id_t sig_id; 
+struct of_oxm_och_sigtype : of_oxm {
+    uint32_t type_len == 0x00085801; 	
+    uint8_t value;
+};
+
+struct of_oxm_och_sigid : of_oxm {
+    uint32_t type_len == 0x00085A06; 
+    of_sig_id_t value;
+};
+
+struct of_oxm_och_sigtype_basic : of_oxm {
+    uint32_t type_len == 0x80005801; 	
+    uint8_t value;
+};
+
+struct of_oxm_och_sigid_basic : of_oxm {
+    uint32_t type_len == 0x80005A06; 
+    of_sig_id_t value;
 };
 
 
-
-// circuit extension action
-struct of_action_circuit: of_action_experimenter {
+struct of_action_circuit : of_action_experimenter {
     uint16_t type == 65535;
     uint16_t len;
-    uint32_t experimenter == 0xffff;
-    	
+    uint32_t experimenter == 0x748771;
+    uint16_t subtype == 25;
+    uint16_t hlength == 16; // fix length of OXM field
+    of_oxm_t field;
+    pad(2);
 };
 
 
diff --git a/openflow_input/oxm-1.3 b/openflow_input/oxm-1.3
index a25b8b2..2dbab42 100644
--- a/openflow_input/oxm-1.3
+++ b/openflow_input/oxm-1.3
@@ -40,19 +40,3 @@
     uint64_t value;
     uint64_t value_mask;
 };
-
-struct of_oxm_och_sigtype : of_oxm {
-    uint32_t type_len == 0x80005c08;
-    uint64_t value;
-};
-
-
-struct of_oxm_och_sigid : of_oxm {
-    uint32_t type_len == 0x80005d10;
-    uint64_t value;
-};
-
-
-
-
-