[ONOS-6641] VXLAN packet support

Change-Id: I7d2086cded3edafa26219609e4f3458b0ea394c0
diff --git a/utils/misc/src/main/java/org/onlab/packet/UDP.java b/utils/misc/src/main/java/org/onlab/packet/UDP.java
index 6849654..0d7ff37 100644
--- a/utils/misc/src/main/java/org/onlab/packet/UDP.java
+++ b/utils/misc/src/main/java/org/onlab/packet/UDP.java
@@ -34,12 +34,14 @@
                     .put(UDP.DHCP_CLIENT_PORT, DHCP.deserializer())
                     .put(UDP.DHCP_V6_SERVER_PORT, DHCP6.deserializer())
                     .put(UDP.DHCP_V6_CLIENT_PORT, DHCP6.deserializer())
+                    .put(UDP.VXLAN_UDP_PORT, VXLAN.deserializer())
                     .build();
 
     public static final int DHCP_SERVER_PORT = 67;
     public static final int DHCP_CLIENT_PORT = 68;
     public static final int DHCP_V6_SERVER_PORT = 547;
     public static final int DHCP_V6_CLIENT_PORT = 546;
+    public static final int VXLAN_UDP_PORT = 4789;
 
     private static final short UDP_HEADER_LENGTH = 8;