diff --git a/utils/misc/src/main/java/org/onlab/packet/Ethernet.java b/utils/misc/src/main/java/org/onlab/packet/Ethernet.java
index 70a52e2..96ec021 100644
--- a/utils/misc/src/main/java/org/onlab/packet/Ethernet.java
+++ b/utils/misc/src/main/java/org/onlab/packet/Ethernet.java
@@ -18,6 +18,8 @@
 
 package org.onlab.packet;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 import java.nio.ByteBuffer;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -86,6 +88,17 @@
      * @param destMac the destination MAC to set
      * @return the Ethernet frame
      */
+    public Ethernet setDestinationMACAddress(final MacAddress destMac) {
+        this.destinationMACAddress = checkNotNull(destMac);
+        return this;
+    }
+
+    /**
+     * Sets the destination MAC address.
+     *
+     * @param destMac the destination MAC to set
+     * @return the Ethernet frame
+     */
     public Ethernet setDestinationMACAddress(final byte[] destMac) {
         this.destinationMACAddress = MacAddress.valueOf(destMac);
         return this;
@@ -126,6 +139,17 @@
      * @param sourceMac the source MAC to set
      * @return the Ethernet frame
      */
+    public Ethernet setSourceMACAddress(final MacAddress sourceMac) {
+        this.sourceMACAddress = checkNotNull(sourceMac);
+        return this;
+    }
+
+    /**
+     * Sets the source MAC address.
+     *
+     * @param sourceMac the source MAC to set
+     * @return the Ethernet frame
+     */
     public Ethernet setSourceMACAddress(final byte[] sourceMac) {
         this.sourceMACAddress = MacAddress.valueOf(sourceMac);
         return this;
diff --git a/utils/misc/src/main/java/org/onlab/packet/MacAddress.java b/utils/misc/src/main/java/org/onlab/packet/MacAddress.java
index 5675a31..5c59d22 100644
--- a/utils/misc/src/main/java/org/onlab/packet/MacAddress.java
+++ b/utils/misc/src/main/java/org/onlab/packet/MacAddress.java
@@ -25,9 +25,6 @@
     public static final MacAddress ZERO = valueOf("00:00:00:00:00:00");
     public static final MacAddress BROADCAST = valueOf("ff:ff:ff:ff:ff:ff");
 
-    public static final byte[] ZERO_MAC_ADDRESS = ZERO.getAddress();
-    public static final byte[] BROADCAST_MAC = BROADCAST.getAddress();
-
     private static final byte[] LL = new byte[]{
             0x01, (byte) 0x80, (byte) 0xc2, 0x00, 0x00,
             0x00, 0x0e, 0x03
@@ -217,8 +214,4 @@
         }
         return builder.toString();
     }
-
-    public byte[] getAddress() {
-        return this.address;
-    }
 }
diff --git a/utils/misc/src/main/java/org/onlab/packet/ONOSLLDP.java b/utils/misc/src/main/java/org/onlab/packet/ONOSLLDP.java
index df3880f..0b33c45 100644
--- a/utils/misc/src/main/java/org/onlab/packet/ONOSLLDP.java
+++ b/utils/misc/src/main/java/org/onlab/packet/ONOSLLDP.java
@@ -64,7 +64,7 @@
         setName(DEFAULT_NAME);
         setDevice(DEFAULT_DEVICE);
         setOptionalTLVList(Lists.<LLDPTLV>newArrayList(nameTLV, deviceTLV));
-        setTtl(new LLDPTLV().setType((byte) TTL_TLV_TYPE)
+        setTtl(new LLDPTLV().setType(TTL_TLV_TYPE)
                        .setLength((short) ttlValue.length)
                        .setValue(ttlValue));
 
@@ -94,7 +94,7 @@
     public void setChassisId(final ChassisId chassisId) {
         MacAddress chassisMac = MacAddress.valueOf(chassisId.value());
         byte[] chassis = ArrayUtils.addAll(new byte[] {CHASSIS_TLV_SUBTYPE},
-                                           chassisMac.getAddress());
+                                           chassisMac.toBytes());
 
         LLDPTLV chassisTLV = new LLDPTLV();
         chassisTLV.setLength(CHASSIS_TLV_SIZE);