diff --git a/core/common/src/main/java/org/onosproject/codec/impl/EncodeInstructionCodecHelper.java b/core/common/src/main/java/org/onosproject/codec/impl/EncodeInstructionCodecHelper.java
index e025475..6322ba9 100644
--- a/core/common/src/main/java/org/onosproject/codec/impl/EncodeInstructionCodecHelper.java
+++ b/core/common/src/main/java/org/onosproject/codec/impl/EncodeInstructionCodecHelper.java
@@ -125,25 +125,21 @@
                         (L2ModificationInstruction.ModEtherInstruction) l2Instruction;
                 result.put(InstructionCodec.MAC, modEtherInstruction.mac().toString());
                 break;
-
             case VLAN_ID:
                 final L2ModificationInstruction.ModVlanIdInstruction modVlanIdInstruction =
                         (L2ModificationInstruction.ModVlanIdInstruction) l2Instruction;
                 result.put(InstructionCodec.VLAN_ID, modVlanIdInstruction.vlanId().toShort());
                 break;
-
             case VLAN_PCP:
                 final L2ModificationInstruction.ModVlanPcpInstruction modVlanPcpInstruction =
                         (L2ModificationInstruction.ModVlanPcpInstruction) l2Instruction;
                 result.put(InstructionCodec.VLAN_PCP, modVlanPcpInstruction.vlanPcp());
                 break;
-
             case MPLS_LABEL:
                 final L2ModificationInstruction.ModMplsLabelInstruction modMplsLabelInstruction =
                         (L2ModificationInstruction.ModMplsLabelInstruction) l2Instruction;
                 result.put(InstructionCodec.MPLS_LABEL, modMplsLabelInstruction.label().toInt());
                 break;
-
             case MPLS_PUSH:
                 final L2ModificationInstruction.PushHeaderInstructions pushHeaderInstructions =
                         (L2ModificationInstruction.PushHeaderInstructions) l2Instruction;
@@ -151,13 +147,18 @@
                 result.put(InstructionCodec.ETHERNET_TYPE,
                         pushHeaderInstructions.ethernetType().toShort());
                 break;
-
             case TUNNEL_ID:
                 final L2ModificationInstruction.ModTunnelIdInstruction modTunnelIdInstruction =
                         (L2ModificationInstruction.ModTunnelIdInstruction) l2Instruction;
                 result.put(InstructionCodec.TUNNEL_ID, modTunnelIdInstruction.tunnelId());
                 break;
-
+            case MPLS_BOS:
+                final L2ModificationInstruction.ModMplsBosInstruction modMplsBosInstruction =
+                        (L2ModificationInstruction.ModMplsBosInstruction) l2Instruction;
+                result.put(InstructionCodec.MPLS_BOS, modMplsBosInstruction.mplsBos());
+            case MPLS_POP:
+            case DEC_MPLS_TTL:
+                break;
             default:
                 log.info("Cannot convert L2 subtype of {}", l2Instruction.subtype());
                 break;
@@ -181,14 +182,16 @@
                         (L3ModificationInstruction.ModIPInstruction) l3Instruction;
                 result.put(InstructionCodec.IP, modIPInstruction.ip().toString());
                 break;
-
             case IPV6_FLABEL:
                 final L3ModificationInstruction.ModIPv6FlowLabelInstruction
                         modFlowLabelInstruction =
                         (L3ModificationInstruction.ModIPv6FlowLabelInstruction) l3Instruction;
                 result.put(InstructionCodec.FLOW_LABEL, modFlowLabelInstruction.flowLabel());
                 break;
-
+            case TTL_IN:
+            case TTL_OUT:
+            case DEC_TTL:
+                break;
             default:
                 log.info("Cannot convert L3 subtype of {}", l3Instruction.subtype());
                 break;
@@ -210,14 +213,12 @@
                         (L4ModificationInstruction.ModTransportPortInstruction) l4Instruction;
                 result.put(InstructionCodec.TCP_PORT, modTcpPortInstruction.port().toInt());
                 break;
-
             case UDP_DST:
             case UDP_SRC:
                 final L4ModificationInstruction.ModTransportPortInstruction modUdpPortInstruction =
                         (L4ModificationInstruction.ModTransportPortInstruction) l4Instruction;
                 result.put(InstructionCodec.UDP_PORT, modUdpPortInstruction.port().toInt());
                 break;
-
             default:
                 log.info("Cannot convert L4 subtype of {}", l4Instruction.subtype());
                 break;
@@ -225,6 +226,16 @@
     }
 
     /**
+     * Encode a extension instruction.
+     *
+     * @param result json node that the instruction attributes are added to
+     */
+    private void encodeExtension(ObjectNode result) {
+        // TODO Support extension in REST API
+        log.info("Cannot convert instruction type of EXTENSION");
+    }
+
+    /**
      * Encodes the given instruction into JSON.
      *
      * @return JSON object node representing the instruction
@@ -283,6 +294,10 @@
                 encodeL4(result);
                 break;
 
+            case EXTENSION:
+                encodeExtension(result);
+                break;
+
             default:
                 log.info("Cannot convert instruction type of {}", instruction.type());
                 break;