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<img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/megaco-3.16.0.2.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>Megaco/H.248</strong><br><strong>User's Guide</strong><br><small>Version 3.16.0.2</small></p>
<br><a href="javascript:openAllFlips()">Expand All</a><br><a href="javascript:closeAllFlips()">Contract All</a><p><small><strong>Chapters</strong></small></p>
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<li id="no" title="Introduction" expanded="false">Introduction<ul>
<li><a href="megaco_intro.html">
Top of chapter
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<li title="Scope and Purpose"><a href="megaco_intro.html#id56570">Scope and Purpose</a></li>
<li title="Prerequisites"><a href="megaco_intro.html#id65628">Prerequisites</a></li>
<li title="About This Manual"><a href="megaco_intro.html#id61790">About This Manual</a></li>
<li title="Where to Find More Information"><a href="megaco_intro.html#id62066">Where to Find More Information</a></li>
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<li id="no" title="Architecture" expanded="false">Architecture<ul>
<li><a href="megaco_architecture.html">
Top of chapter
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<li title="Network view"><a href="megaco_architecture.html#id58224">Network view</a></li>
<li title="General"><a href="megaco_architecture.html#id65139">General</a></li>
<li title="Single node config"><a href="megaco_architecture.html#id60119">Single node config</a></li>
<li title="Distributed config"><a href="megaco_architecture.html#id58176">Distributed config</a></li>
<li title="Message round-trip call flow"><a href="megaco_architecture.html#id61141">Message round-trip call flow</a></li>
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<li id="no" title="Running the stack" expanded="false">Running the stack<ul>
<li><a href="megaco_run.html">
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<li title="Starting"><a href="megaco_run.html#id64614">Starting</a></li>
<li title="MGC startup call flow"><a href="megaco_run.html#id65587">MGC startup call flow</a></li>
<li title="MG startup call flow"><a href="megaco_run.html#id64564">MG startup call flow</a></li>
<li title="Configuring the Megaco stack"><a href="megaco_run.html#id65484">Configuring the Megaco stack</a></li>
<li title="Initial configuration"><a href="megaco_run.html#id65269">Initial configuration</a></li>
<li title="Changing the configuration"><a href="megaco_run.html#id65365">Changing the configuration</a></li>
<li title="The transaction sender"><a href="megaco_run.html#id64741">The transaction sender</a></li>
<li title="Segmentation of transaction replies"><a href="megaco_run.html#id64873">Segmentation of transaction replies</a></li>
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<li id="no" title="Internal form and its encodings" expanded="false">Internal form and its encodings<ul>
<li><a href="megaco_encode.html">
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<li title="Internal form of messages"><a href="megaco_encode.html#id64187">Internal form of messages</a></li>
<li title="The different encodings"><a href="megaco_encode.html#id64304">The different encodings</a></li>
<li title="Configuration of Erlang distribution encoding module"><a href="megaco_encode.html#id64461">Configuration of Erlang distribution encoding module</a></li>
<li title="Configuration of text encoding module(s)"><a href="megaco_encode.html#id65758">Configuration of text encoding module(s)</a></li>
<li title="Configuration of binary encoding module(s)"><a href="megaco_encode.html#id65967">Configuration of binary encoding module(s)</a></li>
<li title="Handling megaco versions"><a href="megaco_encode.html#id66078">Handling megaco versions</a></li>
<li title="Encoder callback functions"><a href="megaco_encode.html#id66326">Encoder callback functions</a></li>
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</li>
<li id="no" title="Transport mechanisms" expanded="false">Transport mechanisms<ul>
<li><a href="megaco_transport_mechanisms.html">
Top of chapter
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<li title="Callback interface"><a href="megaco_transport_mechanisms.html#id66413">Callback interface</a></li>
<li title="Examples"><a href="megaco_transport_mechanisms.html#id66482">Examples</a></li>
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<li id="no" title="Implementation examples" expanded="false">Implementation examples<ul>
<li><a href="megaco_examples.html">
Top of chapter
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<li title="A simple Media Gateway Controller"><a href="megaco_examples.html#id66572">A simple Media Gateway Controller</a></li>
<li title="A simple Media Gateway"><a href="megaco_examples.html#id66620">A simple Media Gateway</a></li>
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<li id="loadscrollpos" title="Megaco mib" expanded="true">Megaco mib<ul>
<li><a href="megaco_mib.html">
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<li title="Intro"><a href="megaco_mib.html#id66738">Intro</a></li>
<li title="Statistics counters"><a href="megaco_mib.html#id66763">Statistics counters</a></li>
<li title="Distribution"><a href="megaco_mib.html#id66799">Distribution</a></li>
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<li id="no" title="Performance comparison" expanded="false">Performance comparison<ul>
<li><a href="megaco_performance.html">
Top of chapter
</a></li>
<li title="Comparison of encoder/decoders"><a href="megaco_performance.html#id66878">Comparison of encoder/decoders</a></li>
<li title="System performance characteristics"><a href="megaco_performance.html#id67709">System performance characteristics</a></li>
<li title="Description of encoders/decoders"><a href="megaco_performance.html#id67746">Description of encoders/decoders</a></li>
<li title="Setup"><a href="megaco_performance.html#id67856">Setup</a></li>
<li title="Summary"><a href="megaco_performance.html#id67869">Summary</a></li>
</ul>
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<li id="no" title="Testing and tools" expanded="false">Testing and tools<ul>
<li><a href="megaco_debug.html">
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<li title="Tracing"><a href="megaco_debug.html#id67998">Tracing</a></li>
<li title="Measurement and transformation"><a href="megaco_debug.html#id68043">Measurement and transformation</a></li>
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<h1>7 Megaco mib</h1>
<h3><a name="id66738">7.1
Intro</a></h3>
<p>The Megaco mib is as of yet not standardized and our
implementation is based on
<strong>draft-ietf-megaco-mib-04.txt</strong>. Almost all of the mib
cannot easily be implemented by the megaco application. Instead
these things should be implemented by a user (of the megaco
application). </p>
<p>So what part of the mib is implemented? Basically the relevant
statistic counters of the <strong>MedGwyGatewayStatsEntry</strong>.</p>
<h3><a name="id66763">7.2
Statistics counters</a></h3>
<p>The implementation of the statistic counters is
lightweight. I.e. the statistic counters are handled
separately by different entities of the application. For
instance our two transport module(s) (see <span class="bold_code"><a href="megaco_tcp.html#stats">megaco_tcp</a></span> and <span class="bold_code"><a href="megaco_udp.html#stats">megaco_udp</a></span>) maintain their
own counters and the application engine (see <span class="bold_code"><a href="megaco.html#stats">megaco</a></span>) maintain its own
counters.</p>
<p>This also means that if a user implement their own transport
service then it has to maintain its own statistics.</p>
<h3><a name="id66799">7.3
Distribution</a></h3>
<p>Each megaco application maintains its own set of counters. So
in a large (distributed) MG/MGC it could be necessary to
collect the statistics from several nodes (each) running the
megaco application (only one of them with the transport).</p>
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