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<section id="multicast-and-iptv">
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<span id="multicast"></span><h1>Multicast and IPTV<a class="headerlink" href="#multicast-and-iptv" title="Permalink to this headline"></a></h1>
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<p>The BNG Blaster provides advanced functionalities for testing multicast
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over PPPoE sessions with focus on IPTV. Therefore IGMP version 1, 2 and 3
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is implemented with support for up to 8 group records per session and 3
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sources per group.</p>
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<p>Multicast testing is supported using external multicast traffic like real
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world IPTV traffic or by generating multicast traffic on the network interface.</p>
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<section id="generate-multicast-traffic">
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<h2>Generate Multicast Traffic<a class="headerlink" href="#generate-multicast-traffic" title="Permalink to this headline"></a></h2>
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<p>The BNG Blaster supports different ways to generate multicast traffic. The first
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one is via igmp configuration and second one using raw streams.</p>
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<p>The following example shows how to generate traffic for 100 multicast groups
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with one packet per millisecond for every group.</p>
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<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"interfaces"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"tx-interval"</span><span class="p">:</span><span class="w"> </span><span class="mf">1.0</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"rx-interval"</span><span class="p">:</span><span class="w"> </span><span class="mf">1.0</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"network"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"interface"</span><span class="p">:</span><span class="w"> </span><span class="s2">"eth2"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"100.0.0.10"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"gateway"</span><span class="p">:</span><span class="w"> </span><span class="s2">"100.0.0.2"</span><span class="w"></span>
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<span class="w"> </span><span class="p">}</span><span class="w"></span>
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<span class="w"> </span><span class="p">},</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"igmp"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"group"</span><span class="p">:</span><span class="w"> </span><span class="s2">"239.0.0.1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"group-iter"</span><span class="p">:</span><span class="w"> </span><span class="s2">"0.0.0.1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"group-count"</span><span class="p">:</span><span class="w"> </span><span class="mi">100</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"source"</span><span class="p">:</span><span class="w"> </span><span class="s2">"100.0.0.10"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"send-multicast-traffic"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="w"></span>
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<span class="w"> </span><span class="p">}</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
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</pre></div>
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</div>
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<p>It is recommended to send multicast traffic with 1000 PPS per group
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to measure the join and leave delay in milliseconds. Therefore the
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<code class="docutils literal notranslate"><span class="pre">tx-interval</span></code> and <code class="docutils literal notranslate"><span class="pre">rx-interval</span></code> should be set to at to at least
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<cite>1.0</cite> (1ms) for more precise IGMP join/leave delay measurements.</p>
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<p>It is also possible to generate multicast traffic using RAW streams as shown in the
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example below:</p>
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<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"streams"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"></span>
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<span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"MC1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ipv4"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"direction"</span><span class="p">:</span><span class="w"> </span><span class="s2">"downstream"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"priority"</span><span class="p">:</span><span class="w"> </span><span class="mi">128</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"network-ipv4-address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1.1.1.1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"destination-ipv4-address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"239.0.0.1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"length"</span><span class="p">:</span><span class="w"> </span><span class="mi">256</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"pps"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"network-interface"</span><span class="p">:</span><span class="w"> </span><span class="s2">"eth1"</span><span class="w"></span>
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<span class="w"> </span><span class="p">},</span><span class="w"></span>
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<span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"MC2"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ipv4"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"direction"</span><span class="p">:</span><span class="w"> </span><span class="s2">"downstream"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"priority"</span><span class="p">:</span><span class="w"> </span><span class="mi">128</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"network-ipv4-address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"2.2.2.2"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"destination-ipv4-address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"239.0.0.2"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"length"</span><span class="p">:</span><span class="w"> </span><span class="mi">256</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"pps"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"network-interface"</span><span class="p">:</span><span class="w"> </span><span class="s2">"eth2"</span><span class="w"></span>
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<span class="w"> </span><span class="p">}</span><span class="w"></span>
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<span class="w"> </span><span class="p">]</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
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</pre></div>
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</div>
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<p>Using RAW streams allows to generate streams distributed over multiple network interfaces
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with higher transmit rate using threaded streams if needed.</p>
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<p>Setting the <code class="docutils literal notranslate"><span class="pre">destination-ipv4-address</span></code> to an multicast IPv4 address is enough to generate
|
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proper multicast streams. All headers including the BNG Blaster header will be automatically
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set for multicast. Therefore such streams can be also used to measure the IGMP join and leave
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delay.</p>
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<p>The BNG Blaster is recognizing loss using the <a class="reference internal" href="../reference/traffic.html#bbl-header"><span class="std std-ref">BNG Blaster header</span></a>
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sequence numbers. After first multicast traffic is received for a particular group,
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for every further packet it checks if there is a gap between last and new sequence number
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which is than reported as loss. The argument option <code class="docutils literal notranslate"><span class="pre">-l</span> <span class="pre">loss</span></code> enables loss logging which
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allows to search for the missing packets in the corresponding capture files.</p>
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<div class="admonition tip">
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<p class="admonition-title">Tip</p>
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<p>It is also possible to start a dedicated BNG Blaster instance to generate multicast
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traffic which can be consumed by multiple BNG Blaster instances. The BNG Blaster
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header allows to do the same measurements on traffic generated from same or different
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BNG Blaster instance.</p>
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</div>
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</section>
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<section id="manual-join-leave-testing">
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<h2>Manual Join/Leave Testing<a class="headerlink" href="#manual-join-leave-testing" title="Permalink to this headline"></a></h2>
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<p>It is possible to join and leave multicast groups manually using the <a class="reference internal" href="../api/index.html#api"><span class="std std-ref">command</span></a>
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<code class="docutils literal notranslate"><span class="pre">igmp-join</span></code>.</p>
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<p><code class="docutils literal notranslate"><span class="pre">$</span> <span class="pre">sudo</span> <span class="pre">bngblaster-cli</span> <span class="pre">run.sock</span> <span class="pre">igmp-join</span> <span class="pre">session-id</span> <span class="pre">1</span> <span class="pre">group</span> <span class="pre">232.1.1.1</span> <span class="pre">source1</span> <span class="pre">202.11.23.101</span> <span class="pre">source2</span> <span class="pre">202.11.23.102</span> <span class="pre">source3</span> <span class="pre">202.11.23.103</span></code></p>
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<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ok"</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
|
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</pre></div>
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</div>
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<p><code class="docutils literal notranslate"><span class="pre">$</span> <span class="pre">sudo</span> <span class="pre">bngblaster-cli</span> <span class="pre">run.sock</span> <span class="pre">igmp-info</span> <span class="pre">session-id</span> <span class="pre">1</span></code></p>
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<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ok"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"igmp-groups"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"></span>
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<span class="w"> </span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"group"</span><span class="p">:</span><span class="w"> </span><span class="s2">"232.1.1.1"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"igmp-sources"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"></span>
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<span class="w"> </span><span class="s2">"202.11.23.101"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="s2">"202.11.23.102"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="s2">"202.11.23.103"</span><span class="w"></span>
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<span class="w"> </span><span class="p">],</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"packets"</span><span class="p">:</span><span class="w"> </span><span class="mi">1291</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"loss"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"state"</span><span class="p">:</span><span class="w"> </span><span class="s2">"active"</span><span class="p">,</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"join-delay-ms"</span><span class="p">:</span><span class="w"> </span><span class="mi">139</span><span class="w"></span>
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<span class="w"> </span><span class="p">}</span><span class="w"></span>
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<span class="w"> </span><span class="p">]</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
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</pre></div>
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</div>
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<p><code class="docutils literal notranslate"><span class="pre">$</span> <span class="pre">sudo</span> <span class="pre">bngblaster-cli</span> <span class="pre">run.sock</span> <span class="pre">igmp-leave</span> <span class="pre">session-id</span> <span class="pre">1</span> <span class="pre">group</span> <span class="pre">232.1.1.1</span></code></p>
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<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
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<span class="w"> </span><span class="nt">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ok"</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
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</pre></div>
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</div>
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<p><code class="docutils literal notranslate"><span class="pre">$</span> <span class="pre">sudo</span> <span class="pre">bngblaster-cli</span> <span class="pre">run.sock</span> <span class="pre">igmp-info</span> <span class="pre">session-id</span> <span class="pre">1</span></code></p>
|
|
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ok"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"igmp-groups"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"></span>
|
|
<span class="w"> </span><span class="p">{</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"group"</span><span class="p">:</span><span class="w"> </span><span class="s2">"232.1.1.1"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"igmp-sources"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"></span>
|
|
<span class="w"> </span><span class="s2">"202.11.23.101"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="s2">"202.11.23.102"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="s2">"202.11.23.103"</span><span class="w"></span>
|
|
<span class="w"> </span><span class="p">],</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"packets"</span><span class="p">:</span><span class="w"> </span><span class="mi">7456</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"loss"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"state"</span><span class="p">:</span><span class="w"> </span><span class="s2">"idle"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"leave-delay-ms"</span><span class="p">:</span><span class="w"> </span><span class="mi">114</span><span class="w"></span>
|
|
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
|
<span class="w"> </span><span class="p">]</span><span class="w"></span>
|
|
<span class="p">}</span><span class="w"></span>
|
|
</pre></div>
|
|
</div>
|
|
</section>
|
|
<section id="iptv-zapping-test">
|
|
<h2>IPTV Zapping Test<a class="headerlink" href="#iptv-zapping-test" title="Permalink to this headline"></a></h2>
|
|
<p>A key element of IPTV services is the delay in changing channels.
|
|
How long does it take to change from one channel to another, is
|
|
the right channel received and the old channel stopped without overlap
|
|
between old and new channel which may leads into traffic congestions if
|
|
both channels are send at the same time. Verify that fast channel changes
|
|
(zapping) works reliable as well.</p>
|
|
<p>The BNG Blaster is able to emulate different client zapping behaviors and
|
|
measure the resulting join/leave delays and possible multicast traffic loss.</p>
|
|
<p>The join delay is the time in milliseconds between sending join and receiving
|
|
first multicast packet of the requested group. The leave delay is the time between
|
|
sending leave and the last multicast packet received for this group. Multicast packets
|
|
received for the leaved group after first packet of joined group is received are counted
|
|
as overlap.</p>
|
|
<p>The following configuration shows an example of the <code class="docutils literal notranslate"><span class="pre">igmp</span></code> section
|
|
for a typical zapping test.</p>
|
|
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"igmp"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"version"</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"start-delay"</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"group"</span><span class="p">:</span><span class="w"> </span><span class="s2">"239.0.0.1"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"group-iter"</span><span class="p">:</span><span class="w"> </span><span class="s2">"0.0.0.1"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"group-count"</span><span class="p">:</span><span class="w"> </span><span class="mi">20</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"source"</span><span class="p">:</span><span class="w"> </span><span class="s2">"100.0.0.10"</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"zapping-interval"</span><span class="p">:</span><span class="w"> </span><span class="mi">5</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"zapping-count"</span><span class="p">:</span><span class="w"> </span><span class="mi">5</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"zapping-view-duration"</span><span class="p">:</span><span class="w"> </span><span class="mi">30</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"zapping-wait"</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"combined-leave-join"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"></span>
|
|
<span class="w"> </span><span class="nt">"send-multicast-traffic"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="w"></span>
|
|
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
|
<span class="p">}</span><span class="w"></span>
|
|
</pre></div>
|
|
</div>
|
|
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span><span class="w"> </span><span class="nt">"igmp"</span><span class="p">:</span><span class="w"> </span><span class="p">{}</span><span class="w"> </span><span class="p">}</span><span class="w"></span>
|
|
</pre></div>
|
|
</div>
|
|
<table class="colwidths-given docutils align-default">
|
|
<colgroup>
|
|
<col style="width: 25%" />
|
|
<col style="width: 50%" />
|
|
<col style="width: 25%" />
|
|
</colgroup>
|
|
<thead>
|
|
<tr class="row-odd"><th class="head"><p>Attribute</p></th>
|
|
<th class="head"><p>Description</p></th>
|
|
<th class="head"><p>Default</p></th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr class="row-even"><td><p><cite>autostart</cite></p></td>
|
|
<td><p>Automatically join after session is established</p></td>
|
|
<td><p>true</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>version</cite></p></td>
|
|
<td><p>IGMP protocol version (1, 2 or 3)</p></td>
|
|
<td><p>3</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>combined-leave-join</cite></p></td>
|
|
<td><p>Combine leave and join records within a single IGMPv3 report</p></td>
|
|
<td><p>true</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>start-delay</cite></p></td>
|
|
<td><p>Delay between session established and initial IGMP join in seconds</p></td>
|
|
<td><p>1</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>group</cite></p></td>
|
|
<td><p>Multicast group base address (e.g. 239.0.0.1)</p></td>
|
|
<td><p>0.0.0.0 (disabled)</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>group-iter</cite></p></td>
|
|
<td><p>Multicast group iterator</p></td>
|
|
<td><p>0.0.0.1</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>group-count</cite></p></td>
|
|
<td><p>Multicast group count</p></td>
|
|
<td><p>1</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>source</cite></p></td>
|
|
<td><p>Multicast source address (e.g. 1.1.1.1)</p></td>
|
|
<td><p>0.0.0.0 (ASM)</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>zapping-interval</cite></p></td>
|
|
<td><p>IGMP channel zapping interval in seconds</p></td>
|
|
<td><p>0 (disabled)</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>zapping-count</cite></p></td>
|
|
<td><p>Define the amount of channel changes before starting view duration</p></td>
|
|
<td><p>0 (disabled)</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>view-duration</cite></p></td>
|
|
<td><p>Define the view duration in seconds</p></td>
|
|
<td><p>0 (disabled)</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>send-multicast-traffic</cite></p></td>
|
|
<td><p>Generate multicast traffic</p></td>
|
|
<td><p>false</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>multicast-traffic-length</cite></p></td>
|
|
<td><p>Multicast traffic IP length</p></td>
|
|
<td><p>76</p></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>multicast-traffic-tos</cite></p></td>
|
|
<td><p>Multicast traffic TOS priority</p></td>
|
|
<td><p>0</p></td>
|
|
</tr>
|
|
<tr class="row-even"><td><p><cite>network-interface</cite></p></td>
|
|
<td><p>Multicast traffic source interface</p></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="row-odd"><td><p><cite>max-join-delay</cite></p></td>
|
|
<td><p>Maximum join delay in milliseconds</p></td>
|
|
<td><p>0 (disabled)</p></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Per default join and leave requests are send using dedicated reports.
|
|
The option <code class="docutils literal notranslate"><span class="pre">combined-leave-join</span></code> allows the combination of leave and
|
|
join records within a single IGMPv3 report using multiple group records.
|
|
This option is applicable to IGMP version 3 only!</p>
|
|
<p>If <code class="docutils literal notranslate"><span class="pre">send-multicast-traffic</span></code> is true, the BNG Blaster generates multicast
|
|
traffic on the network interface based on the specified group and source
|
|
attributes mentioned before. This traffic includes some special signatures
|
|
for faster processing and more detailed analysis.</p>
|
|
<p>If group is set to 293.0.0.1 with group-iter of 0.0.0.2, source 1.1.1.1
|
|
and group-count 3 the result are the following three groups (S.G)
|
|
1.1.1.1,239.0.0.1, 1.1.1.1,239.0.0.3 and 1.1.1.1,239.0.0.5.</p>
|
|
<p>If <code class="docutils literal notranslate"><span class="pre">max-join-delay</span></code> is configured, the final report includes how often
|
|
the measured join delay is above the configured threshold here.</p>
|
|
</section>
|
|
<section id="multicast-limitations">
|
|
<h2>Multicast Limitations<a class="headerlink" href="#multicast-limitations" title="Permalink to this headline"></a></h2>
|
|
<p>The BNG Blaster IGMP implementation supports up to 3 sources per group record
|
|
and 12 group records per session.</p>
|
|
<p>The check for overlapping multicast traffic is supported for zapping tests only.</p>
|
|
</section>
|
|
</section>
|
|
|
|
|
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|
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