diff --git a/argument.cpp b/argument.cpp
new file mode 100644
index 0000000..603a54c
--- /dev/null
+++ b/argument.cpp
@@ -0,0 +1,99 @@
+/**
+ * Copyright © 2018 IBM Corporation
+ *
+ * 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.
+ */
+#include <iostream>
+#include <iterator>
+#include <algorithm>
+#include "argument.hpp"
+
+namespace phosphor
+{
+namespace network
+{
+namespace ncsi
+{
+
+ArgumentParser::ArgumentParser(int argc, char** argv)
+{
+    int option = 0;
+    while (-1 != (option = getopt_long(argc, argv, optionStr, options, NULL)))
+    {
+        if ((option == '?') || (option == 'h'))
+        {
+            usage(argv);
+            exit(-1);
+        }
+
+        auto i = &options[0];
+        while ((i->val != option) && (i->val != 0))
+        {
+            ++i;
+        }
+
+        if (i->val)
+        {
+            arguments[i->name] = (i->has_arg ? optarg : trueString);
+        }
+    }
+}
+
+const std::string& ArgumentParser::operator[](const std::string& opt)
+{
+    auto i = arguments.find(opt);
+    if (i == arguments.end())
+    {
+        return emptyString;
+    }
+    else
+    {
+        return i->second;
+    }
+}
+
+void ArgumentParser::usage(char** argv)
+{
+    std::cerr << "Usage: " << argv[0] << " [options]\n";
+    std::cerr << "Options:\n";
+    std::cerr << "    --help            Print this menu.\n";
+    std::cerr << "    --info=<info>     Retrieve info about NCSI topology.\n";
+    std::cerr << "    --set=<set>       Set a specific package/channel.\n";
+    std::cerr << "    --clear=<clear>   Clear all the settings on the interface.\n";
+    std::cerr << "    --package=<package>  Specify a package.\n";
+    std::cerr << "    --channel=<channel> Specify a channel.\n";
+    std::cerr << "    --index=<device index> Specify device ifindex.\n";
+    std::cerr << std::flush;
+}
+
+const option ArgumentParser::options[] =
+{
+    { "info", no_argument, NULL, 'i' },
+    { "set",   no_argument, NULL, 's' },
+    { "clear",   no_argument, NULL, 'r' },
+    { "package",  required_argument, NULL, 'p' },
+    { "channel",   required_argument, NULL, 'c' },
+    { "index",   required_argument, NULL, 'x' },
+    { "help",   no_argument,       NULL, 'h' },
+    { 0, 0, 0, 0},
+};
+
+const char* ArgumentParser::optionStr = "i:s:r:p:c:x:h?";
+
+const std::string ArgumentParser::trueString = "true";
+const std::string ArgumentParser::emptyString = "";
+
+} //namespace ncsi
+} //namespace network
+} //namespece phosphor
+