diff --git a/python/ofagent/loxi/of11/util.py b/python/ofagent/loxi/of11/util.py
new file mode 100644
index 0000000..f5dd743
--- /dev/null
+++ b/python/ofagent/loxi/of11/util.py
@@ -0,0 +1,140 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior University
+# Copyright (c) 2011, 2012 Open Networking Foundation
+# Copyright (c) 2012, 2013 Big Switch Networks, Inc.
+# See the file LICENSE.pyloxi which should have been included in the source distribution
+# Automatically generated by LOXI from template util.py
+# Do not modify
+
+import struct
+import loxi
+import const
+import common
+import action
+import instruction
+
+def pretty_mac(mac):
+    return ':'.join(["%02x" % x for x in mac])
+
+def pretty_ipv4(v):
+    return "%d.%d.%d.%d" % ((v >> 24) & 0xFF, (v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF)
+
+def pretty_flags(v, flag_names):
+    set_flags = []
+    for flag_name in flag_names:
+        flag_value = getattr(const, flag_name)
+        if v & flag_value == flag_value:
+            set_flags.append(flag_name)
+        elif v & flag_value:
+            set_flags.append('%s&%#x' % (flag_name, v & flag_value))
+        v &= ~flag_value
+    if v:
+        set_flags.append("%#x" % v)
+    return '|'.join(set_flags) or '0'
+
+def pretty_wildcards(v):
+    if v == const.OFPFW_ALL:
+        return 'OFPFW_ALL'
+    flag_names = ['OFPFW_IN_PORT', 'OFPFW_DL_VLAN', 'OFPFW_DL_SRC', 'OFPFW_DL_DST',
+                  'OFPFW_DL_TYPE', 'OFPFW_NW_PROTO', 'OFPFW_TP_SRC', 'OFPFW_TP_DST',
+                  'OFPFW_NW_SRC_MASK', 'OFPFW_NW_DST_MASK', 'OFPFW_DL_VLAN_PCP',
+                  'OFPFW_NW_TOS']
+    return pretty_flags(v, flag_names)
+
+def pretty_port(v):
+    named_ports = [(k,v2) for (k,v2) in const.__dict__.iteritems() if k.startswith('OFPP_')]
+    for (k, v2) in named_ports:
+        if v == v2:
+            return k
+    return v
+
+def pack_port_no(value):
+    return struct.pack("!L", value)
+
+def unpack_port_no(reader):
+    return reader.read("!L")[0]
+
+def pack_fm_cmd(value):
+    return struct.pack("!B", value)
+
+def unpack_fm_cmd(reader):
+    return reader.read("!B")[0]
+
+def init_wc_bmap():
+    return const.OFPFW_ALL
+
+def pack_wc_bmap(value):
+    return struct.pack("!L", value)
+
+def unpack_wc_bmap(reader):
+    return reader.read("!L")[0]
+
+def init_match_bmap():
+    return const.OFPFW_ALL
+
+def pack_match_bmap(value):
+    return struct.pack("!L", value)
+
+def unpack_match_bmap(reader):
+    return reader.read("!L")[0]
+
+MASK64 = (1 << 64) - 1
+
+def pack_bitmap_128(value):
+    x = 0l
+    for y in value:
+        x |= 1 << y
+    return struct.pack("!QQ", (x >> 64) & MASK64, x & MASK64)
+
+def unpack_bitmap_128(reader):
+    hi, lo = reader.read("!QQ")
+    x = (hi << 64) | lo
+    i = 0
+    value = set()
+    while x != 0:
+        if x & 1 == 1:
+            value.add(i)
+        i += 1
+        x >>= 1
+    return value
+
+def pack_bitmap_512(value):
+    words = [0] * 8
+    for v in value:
+        assert v < 512
+        words[7-v/64] |= 1 << (v % 64)
+    return struct.pack("!8Q", *words)
+
+def unpack_bitmap_512(reader):
+    words = reader.read("!8Q")
+    x = 0l
+    for word in words:
+        x <<= 64
+        x |= word
+    i = 0
+    value = set()
+    while x != 0:
+        if x & 1 == 1:
+            value.add(i)
+        i += 1
+        x >>= 1
+    return value
+
+def pack_checksum_128(value):
+    return struct.pack("!QQ", (value >> 64) & MASK64, value & MASK64)
+
+def unpack_checksum_128(reader):
+    hi, lo = reader.read("!QQ")
+    return (hi << 64) | lo