diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instruction.java b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instruction.java
new file mode 100644
index 0000000..5d34fc2
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instruction.java
@@ -0,0 +1,42 @@
+package org.onlab.onos.net.flow.instructions;
+
+/**
+ * Abstraction of a single traffic treatment step.
+ */
+public interface Instruction {
+
+    /**
+     * Represents the type of traffic treatment.
+     */
+    public enum Type {
+        /**
+         * Signifies that the traffic should be dropped.
+         */
+        DROP,
+
+        /**
+         * Signifies that the traffic should be output to a port.
+         */
+        OUTPUT,
+
+        /**
+         * Signifies that.... (do we need this?)
+         */
+        GROUP,
+
+        /**
+         * Signifies that the traffic should be modified in some way.
+         */
+        MODIFICATION
+    }
+
+    // TODO: Create factory class 'Instructions' that will have various factory
+    // to create specific instructions.
+
+    /**
+     * Returns the type of instruction.
+     * @return type of instruction
+     */
+    public Type type();
+
+}
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instructions.java b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instructions.java
new file mode 100644
index 0000000..2365bf0
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/Instructions.java
@@ -0,0 +1,102 @@
+package org.onlab.onos.net.flow.instructions;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.flow.instructions.L2ModificationInstruction.ModEtherInstruction;
+import org.onlab.onos.net.flow.instructions.L2ModificationInstruction.SubType;
+import org.onlab.packet.MACAddress;
+/**
+ * Factory class for creating various traffic treatment instructions.
+ */
+public final class Instructions {
+
+
+    // Ban construction
+    private Instructions() {}
+
+    /**
+     * Creates an output instruction using the specified port number. This can
+     * include logical ports such as CONTROLLER, FLOOD, etc.
+     *
+     * @param number port number
+     * @return output instruction
+     */
+    public static OutputInstruction createOutput(final PortNumber number) {
+        checkNotNull(number, "PortNumber cannot be null");
+        return new OutputInstruction(number);
+    }
+
+    /**
+     * Creates a drop instruction.
+     * @return drop instruction
+     */
+    public static DropInstruction createDrop() {
+        return new DropInstruction();
+    }
+
+    /**
+     * Creates a l2 src modification.
+     * @param addr the mac address to modify to.
+     * @return a l2 modification
+     */
+    public static L2ModificationInstruction modL2Src(MACAddress addr) {
+        checkNotNull(addr, "Src l2 address cannot be null");
+        return new ModEtherInstruction(SubType.L2_SRC, addr);
+    }
+
+    /**
+     * Creates a L2 dst modification.
+     * @param addr the mac address to modify to.
+     * @return a L2 modification
+     */
+    public static L2ModificationInstruction modL2Dst(MACAddress addr) {
+        checkNotNull(addr, "Dst l2 address cannot be null");
+        return new L2ModificationInstruction.ModEtherInstruction(SubType.L2_DST, addr);
+    }
+
+    /**
+     * Creates a L2 type modification.
+     * @param l2Type the type to change to
+     * @return a L2 modifications
+     */
+    public static L2ModificationInstruction modL2Type(Short l2Type) {
+        checkNotNull(l2Type, "L2 type cannot be null");
+        return new L2ModificationInstruction.ModEtherTypeInstruction(l2Type);
+    }
+
+    public static L2ModificationInstruction modVlanId(Short vlanId) {
+        checkNotNull(vlanId, "VLAN id cannot be null");
+        return new L2ModificationInstruction.ModVlanIdInstruction(vlanId);
+    }
+
+    /*
+     *  Output instructions
+     */
+
+    public static final class DropInstruction implements Instruction {
+        @Override
+        public Type type() {
+            return Type.DROP;
+        }
+    }
+
+
+    public static final class OutputInstruction implements Instruction {
+        private final PortNumber port;
+
+        private OutputInstruction(PortNumber port) {
+            this.port = port;
+        }
+
+        public PortNumber port() {
+            return port;
+        }
+
+        @Override
+        public Type type() {
+            return Type.OUTPUT;
+        }
+    }
+
+}
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/instructions/L2ModificationInstruction.java b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/L2ModificationInstruction.java
new file mode 100644
index 0000000..f71ad2e
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/instructions/L2ModificationInstruction.java
@@ -0,0 +1,124 @@
+package org.onlab.onos.net.flow.instructions;
+
+import org.onlab.packet.MACAddress;
+
+/**
+ * Abstraction of a single traffic treatment step.
+ * @param <T> the type parameter for the instruction
+ */
+public abstract class L2ModificationInstruction implements Instruction {
+
+    /**
+     * Represents the type of traffic treatment.
+     */
+    public enum SubType {
+        /**
+         * Ether src modification.
+         */
+        L2_SRC,
+
+        /**
+         * Ether dst modification.
+         */
+        L2_DST,
+
+        /**
+         * Ethertype modification.
+         */
+        L2_TYPE,
+
+        /**
+         * VLAN id modification.
+         */
+        VLAN_ID,
+
+        /**
+         * VLAN priority modification.
+         */
+        VLAN_PCP
+    }
+
+    // TODO: Create factory class 'Instructions' that will have various factory
+    // to create specific instructions.
+
+    /**
+     * Returns the subtype of the modification instruction.
+     * @return type of instruction
+     */
+    public abstract SubType subtype();
+
+    @Override
+    public Type type() {
+        return Type.MODIFICATION;
+    }
+
+    /**
+     * Represents a L2 src/dst modification instruction.
+     */
+    public static final class ModEtherInstruction extends L2ModificationInstruction {
+
+        private final SubType subtype;
+        private final MACAddress mac;
+
+        public ModEtherInstruction(SubType subType, MACAddress addr) {
+            this.subtype = subType;
+            this.mac = addr;
+        }
+
+        @Override
+        public SubType subtype() {
+            return this.subtype;
+        }
+
+        public MACAddress mac() {
+            return this.mac;
+        }
+
+    }
+
+    /**
+     * Represents a L2 type modification instruction.
+     */
+    public static final class ModEtherTypeInstruction extends L2ModificationInstruction {
+
+        public final short l2Type;
+
+        public ModEtherTypeInstruction(short l2Type) {
+            this.l2Type = l2Type;
+        }
+
+        @Override
+        public SubType subtype() {
+            return SubType.L2_TYPE;
+        }
+
+        public short l2Type() {
+            return this.l2Type;
+        }
+
+    }
+
+    /**
+     * Represents a VLAN id modification instruction.
+     */
+    public static final class ModVlanIdInstruction extends L2ModificationInstruction {
+
+        public final Short vlanId;
+
+        public ModVlanIdInstruction(Short vlanId) {
+            this.vlanId = vlanId;
+        }
+
+        @Override
+        public SubType subtype() {
+            return SubType.VLAN_ID;
+        }
+
+        public Short vlanId() {
+            return this.vlanId;
+        }
+
+    }
+
+
+}