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<section id="lspgen">
<span id="id1"></span><h1>LSPGEN<a class="headerlink" href="#lspgen" title="Link to this heading"></a></h1>
<p>The BNG Blaster includes a tool called <code class="docutils literal notranslate"><span class="pre">lspgen</span></code> which is able to generate
ISIS and OSPF topologies with the corresponding link state packets for export
as MRT and PCAP files. Initially, <code class="docutils literal notranslate"><span class="pre">lspgen</span></code> was developed exclusively for ISIS,
hence its name. However, with the introduction of OSPF support in BNG Blaster,
<code class="docutils literal notranslate"><span class="pre">lspgen</span></code> has been enhanced to accommodate OSPF topologies as well.</p>
<p>The default protocol is ISIS which can be changed using the argument <code class="docutils literal notranslate"><span class="pre">-P</span> <span class="pre">ospf2</span></code>.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ lspgen --help
____ __ ____ _ __ ,/
/ __ \ / /_ / __ ) _____ (_)_____ / /__ ,&#39;/
/ /_/ // __// __ |/ ___// // ___// //_/ ,&#39; /
/ _, _// /_ / /_/ // / / // /__ / ,&lt; ,&#39; /_____,
/_/ |_| \__//_____//_/ /_/ \___//_/|_| .&#39;____ ,&#39;
__ _____ ____ ______ / ,&#39;
/ / / ___// __ \/ ____/__ ____ / ,&#39;
/ / \__ \/ /_/ / / __/ _ \/ __ \ /,&#39;
/ /______/ / ____/ /_/ / __/ / / / /
/_____/____/_/ \____/\___/_/ /_/
Usage: lspgen [OPTIONS]
-v --version
-a --area &lt;args&gt;
-P --protocol isis|ospf2|ospf3
-K --authentication-key &lt;args&gt;
-T --authentication-type none|simple|md5
-r --read-config-file &lt;filename&gt;
-w --write-config-file &lt;filename&gt;
-C --connector &lt;args&gt;
-S --control-socket &lt;args&gt;
-l --ipv4-link-prefix &lt;ip-prefix&gt;
-L --ipv6-link-prefix &lt;ip-prefix&gt;
-n --ipv4-node-prefix &lt;ip-prefix&gt;
-N --ipv6-node-prefix &lt;ip-prefix&gt;
-x --ipv4-external-prefix &lt;ip-prefix&gt;
-X --ipv6-external-prefix &lt;ip-prefix&gt;
-u --link-multiplier &lt;args&gt;
-M --lsp-lifetime &lt;args&gt;
-z --no-ipv4
-Z --no-ipv6
-y --no-sr
-e --external-count &lt;args&gt;
-g --graphviz-file &lt;filename&gt;
-h --help
-m --mrt-file &lt;filename&gt;
-c --node-count &lt;args&gt;
-p --pcap-file &lt;filename&gt;
-G --purge
-f --stream-file &lt;filename&gt;
-s --seed &lt;args&gt;
-q --sequence &lt;args&gt;
-Q --quit-loop
-V --level &lt;args&gt;
-t --log normal|debug|lsp|lsdb|packet|ctrl|error
</pre></div>
</div>
<p>You can generate random topologies or define a topology manually
using configuration files.</p>
<section id="connector">
<h2>Connector<a class="headerlink" href="#connector" title="Link to this heading"></a></h2>
<p>The connector (<code class="docutils literal notranslate"><span class="pre">-C</span> <span class="pre">--connector</span> <span class="pre">&lt;args&gt;</span></code>) represents the link between the generated
topology and the attached BNG Blaster instance.</p>
<p>For ISIS topologies, the connector must be set to the <code class="docutils literal notranslate"><span class="pre">system-id</span></code> of the ISIS
instance to which this topology is attached. In the BNG Blaster configuration,
the <code class="docutils literal notranslate"><span class="pre">system-id</span></code> of the root node from the generated toplogy must be referenced.</p>
<img alt="ISIS" src="../_images/bbl_isis.png" />
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ lspgen -a 49.0001/24 -K secret123 -T md5 -C 1921.6800.1001 -m isis.mrt
...
Sep 04 10:50:55.780109 Generating a graph of 10 nodes and 20 links
Sep 04 10:50:55.780127 Root node 1921.6800.0000.00 (node1)
...
</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">&quot;isis&quot;</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><span class="nt">&quot;instance-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;area&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;49.0001/24&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;system-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1921.6800.1001&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;router-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;192.168.1.1&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;hostname&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;R1&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;level1-auth-key&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;secret123&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;level1-auth-type&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;md5&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;external&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;mrt-file&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;isis.mrt&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;connections&quot;</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><span class="nt">&quot;system-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1921.6800.0000.00&quot;</span>
<span class="w"> </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><span class="p">}</span>
<span class="w"> </span><span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>This is simlar for OSPFv2 but here the connector is constructed based on remote router-id
and local link IPv4 address (<code class="docutils literal notranslate"><span class="pre">remote-router-id:local-ipv4-address</span></code>).</p>
<img alt="OSPF" src="../_images/bbl_ospf.png" />
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ lspgen -P ospf2 -m ospf.mrt -n 10.10.0.1 --connector &quot;10.0.0.11:10.0.0.2&quot; -p lspgen.pcap
...
Sep 04 11:02:59.242810 Generating a graph of 10 nodes and 20 links
Sep 04 11:02:59.242827 Root node 10.10.0.1 (node1)
...
</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">&quot;ospf&quot;</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><span class="nt">&quot;instance-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;version&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">2</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;router-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.0.11&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;hostname&quot;</span><span class="p">:</span><span class="w"> </span><span class="nt">&quot;R1&quot;</span>
<span class="w"> </span><span class="nt">&quot;external&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;mrt-file&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;ospf.mrt&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;connections&quot;</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><span class="nt">&quot;router-id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.10.0.1&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;local-ipv4-address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.0.1&quot;</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><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
</section>
<section id="random-topologies">
<h2>Random Topologies<a class="headerlink" href="#random-topologies" title="Link to this heading"></a></h2>
<p>The following example generates a random topology with 1000 nodes.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>lspgen -m isis.mrt -c 1000 -K &lt;secret&gt; -T md5
</pre></div>
</div>
<p>The arguments <code class="docutils literal notranslate"><span class="pre">-K</span></code> and <code class="docutils literal notranslate"><span class="pre">-T</span></code> add a valid authentication TLV
to the generated LSPs in the MRT file.</p>
<p>Those topologies could be even exported as configuration file
with the argument <code class="docutils literal notranslate"><span class="pre">-w</span></code> and later imported with the argument <code class="docutils literal notranslate"><span class="pre">-r</span></code>.
This allows the generation of a large random topology that can be modified
manually.</p>
</section>
<section id="topology-from-configuration-file">
<h2>Topology from Configuration File<a class="headerlink" href="#topology-from-configuration-file" title="Link to this heading"></a></h2>
<p>In addition to randomly generated topologies, it is also possible to
create them specifically using configuration. The following example
shows the configuration for a topology with three nodes.</p>
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;instance&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;default&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;protocol&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;isis&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;level1&quot;</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><span class="nt">&quot;node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0001&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;hostname&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;R1&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;area_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;49.1337/24&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;protocol_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;ipv4&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_address_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;10.13.37.1&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_prefix_list&quot;</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><span class="nt">&quot;ipv4_prefix&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.1/32&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;segment_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">30005</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;node_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span>
<span class="w"> </span><span class="p">},</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;ipv4_prefix&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.0/24&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1000</span>
<span class="w"> </span><span class="p">},</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;ipv4_prefix&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.2.0/24&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1000</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;capability_list&quot;</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><span class="nt">&quot;router_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.1&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv4_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv6_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_base&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">100000</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_range&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">36000</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;neighbor_list&quot;</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><span class="nt">&quot;remote_node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0000.00&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span>
<span class="w"> </span><span class="p">},</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;remote_node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0002.00&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span>
<span class="w"> </span><span class="p">},</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;remote_node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;0204.0000.0003.00&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span>
<span class="w"> </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><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0002&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;hostname&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;R2&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;area_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;49.1337/24&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;protocol_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;ipv4&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_address_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;10.13.37.2&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_prefix_list&quot;</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><span class="nt">&quot;ipv4_prefix&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.2/32&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;segment_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">30003</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;node_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;capability_list&quot;</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><span class="nt">&quot;router_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.2&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv4_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv6_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_base&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">100000</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_range&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">36000</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;neighbor_list&quot;</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><span class="nt">&quot;remote_node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0001.00&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span>
<span class="w"> </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><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.3&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;hostname&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;R3&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;area_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;49.1337/24&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;protocol_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;ipv4&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_address_list&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w"> </span><span class="s2">&quot;10.13.37.3&quot;</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;ipv4_prefix_list&quot;</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><span class="nt">&quot;ipv4_prefix&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.3/32&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;segment_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">30003</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;node_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;capability_list&quot;</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><span class="nt">&quot;router_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.13.37.3&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv4_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;mpls_ipv6_flag&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_base&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">100000</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;srgb_range&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">36000</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;neighbor_list&quot;</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><span class="nt">&quot;remote_node_id&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1337.0000.0001.00&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;metric&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">10</span>
<span class="w"> </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><span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>The randomly generated topologies can be also written to a file
to have an example or starting point for the desired topologies.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>lspgen -P isis -w isis.json
lspgen -P ospf2 -w ospf2.json
lspgen -P ospf3 -w ospf3.json
</pre></div>
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