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  <section id="bgp">
<span id="id1"></span><h1>BGP<a class="headerlink" href="#bgp" title="Link to this heading"></a></h1>
<p>The Border Gateway Protocol (BGP) is a standardized exterior gateway protocol
designed to exchange routing and reachability information among autonomous systems
(AS) on the internet. BGP is classified as a path-vector routing protocol, and it
makes routing decisions based on paths, network policies, or rule sets configured
by a network operator.</p>
<section id="configuration">
<h2>Configuration<a class="headerlink" href="#configuration" title="Link to this heading"></a></h2>
<p>Following is an example of a BGP configuration with one session.</p>
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
<span class="w">    </span><span class="nt">&quot;interfaces&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<span class="w">        </span><span class="nt">&quot;network&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;interface&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;eth1&quot;</span><span class="p">,</span>
<span class="w">                </span><span class="nt">&quot;address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.2/24&quot;</span><span class="p">,</span>
<span class="w">                </span><span class="nt">&quot;gateway&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.1&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="nt">&quot;bgp&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;local-address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.2&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;peer-address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.1&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;raw-update-file&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;test.bgp&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;local-as&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">65001</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;peer-as&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">65001</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;family&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="s2">&quot;ipv4-unicast&quot;</span><span class="p">,</span><span class="w">  </span><span class="s2">&quot;ipv6-unicast&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="p">}</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">&quot;bgp&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{}</span><span class="w"> </span><span class="p">}</span>
</pre></div>
</div>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Attribute</p></th>
<th class="head"><p>Description</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p><strong>network-interface</strong></p></td>
<td><div class="line-block">
<div class="line">BGP local interface (source interface).</div>
<div class="line">Default: <cite>first network interface from configuration</cite></div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>local-address</strong></p></td>
<td><div class="line-block">
<div class="line">BGP local IPv4/6 address (source address).</div>
<div class="line">Default: <cite>network interface address</cite></div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>local-as</strong></p></td>
<td><div class="line-block">
<div class="line">BGP local AS.</div>
<div class="line">Default: 65000 Range: 0 - 4294967295</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>peer-address</strong></p></td>
<td><div class="line-block">
<div class="line">Mandatory BGP peer IPv4/6 address.</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>peer-as</strong></p></td>
<td><div class="line-block">
<div class="line">BGP peer AS.</div>
<div class="line">Default: <cite>local AS</cite> Range: 0 - 4294967295</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>hold-time</strong></p></td>
<td><div class="line-block">
<div class="line">BGP hold-time in seconds.</div>
<div class="line">Default: 90 Range: 0 - 65535</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>id</strong></p></td>
<td><div class="line-block">
<div class="line">BGP identifier.</div>
<div class="line">Default: 1.2.3.4</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>tos</strong></p></td>
<td><div class="line-block">
<div class="line">BGP IP TOS.</div>
<div class="line">Default: 0 Range: 0 - 255</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>ttl</strong></p></td>
<td><div class="line-block">
<div class="line">BGP IP TTL.</div>
<div class="line">Default: 255 Range: 0 - 255</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>reconnect</strong></p></td>
<td><div class="line-block">
<div class="line">Reconnect BGP session automatically.</div>
<div class="line">Default: true</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>start-traffic</strong></p></td>
<td><div class="line-block">
<div class="line">Start global traffic after RAW update finished.</div>
<div class="line">If enabled, the control command <strong>traffic-start</strong> is automatically</div>
<div class="line">executed as soon as the BGP RAW update has finished.</div>
<div class="line">Default: false</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>teardown-time</strong></p></td>
<td><div class="line-block">
<div class="line">BGP teardown time in seconds.</div>
<div class="line">Default: 5 Range: 0 - 65535</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>raw-update-file</strong></p></td>
<td><div class="line-block">
<div class="line">BGP RAW update file.</div>
</div>
</td>
</tr>
<tr class="row-odd"><td><p><strong>family</strong></p></td>
<td><div class="line-block">
<div class="line">BGP families to be send in open message.</div>
<div class="line">Default: ipv4/6-unicast, ipv4/6-labeled-unicast</div>
<div class="line">Values:</div>
<div class="line">ipv4-unicast, ipv6-unicast,</div>
<div class="line">ipv4-multicast, ipv6-multicast,</div>
<div class="line">ipv4-labeled-unicast, ipv6-labeled-unicast,</div>
<div class="line">ipv4-vpn-unicast, ipv6-vpn-unicast,</div>
<div class="line">ipv4-vpn-multicast, ipv6-vpn-multicast,</div>
<div class="line">ipv4-flow, ipv6-flow, evpn</div>
</div>
</td>
</tr>
<tr class="row-even"><td><p><strong>extended-nexthop</strong></p></td>
<td><div class="line-block">
<div class="line">BGP extended-nexthop families to be send in open message.</div>
<div class="line">Default: None</div>
<div class="line">Values: ipv4-unicast, ipv4-vpn-unicast</div>
</div>
</td>
</tr>
</tbody>
</table>
</section>
<section id="bgp-sessions">
<h2>BGP Sessions<a class="headerlink" href="#bgp-sessions" title="Link to this heading"></a></h2>
<p>BGP session are opened with the capabilities for the following
address families:</p>
<ul class="simple">
<li><p>IPv4 unicast</p></li>
<li><p>IPv4 labeled unicast</p></li>
<li><p>IPv6 unicast</p></li>
<li><p>IPv6 labeled unicast</p></li>
</ul>
<p>This can be changed using <cite>family</cite> configuration option.</p>
</section>
<section id="limitations">
<h2>Limitations<a class="headerlink" href="#limitations" title="Link to this heading"></a></h2>
<p>BGP authentication is currently not supported but already
planned as an enhancement in one of the next releases.</p>
</section>
<section id="raw-update-files">
<h2>RAW Update Files<a class="headerlink" href="#raw-update-files" title="Link to this heading"></a></h2>
<p>The BNG Blaster can inject BGP messages from a pre-compiled
RAW update file into the defined sessions. A RAW update file is not
more than a pre-compiled binary stream of BGP messages, typically
but not limited to update messages.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span> 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+                                                               +
|                                                               |
+                                                               +
|                           Marker                              |
+                                                               +
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|          Length               |      Type     | ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-++++
.
.
.
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+                                                               +
|                                                               |
+                                                               +
|                           Marker                              |
+                                                               +
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|          Length               |      Type     | ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-++++
</pre></div>
</div>
<p>Those files can be created using the included BGP RAW update generator
script <code class="docutils literal notranslate"><span class="pre">bgpupdate</span></code> or manually using libraries like scapy or converters
from PCAP or MRT files.</p>
<p>The configured <code class="docutils literal notranslate"><span class="pre">raw-update-file</span></code> under the BGP session is loaded
during BNG Blaster startup phase and send it as soon as the session is
established.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">bgp-raw-update</span></code> <a class="reference internal" href="../api/index.html#api"><span class="std std-ref">command</span></a> allows to send further updates during
the session lifetime.</p>
<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">bgp-raw-update</span> <span class="pre">file</span> <span class="pre">update1.bgp</span></code></p>
<p>This allows loading a full table after the BGP session has
started and manually trigger a series of changes using incremental
updates files.</p>
<p>All BGP RAW update files are loaded once and can then be used for
multiple sessions. Meaning if two or more sessions reference the
same file identified by file name, this file is loaded once into
memory and used by multiple sessions.</p>
<p>Therefore for incremental updates, it may make sense to pre-load
via <code class="docutils literal notranslate"><span class="pre">bgp-raw-update-files</span></code> configuration.</p>
<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
<span class="w">    </span><span class="nt">&quot;bgp&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;local-address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.2&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;peer-address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;10.0.1.1&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;raw-update-file&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;start.bgp&quot;</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;local-as&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">65001</span><span class="p">,</span>
<span class="w">            </span><span class="nt">&quot;peer-as&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">65001</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;bgp-raw-update-files&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<span class="w">        </span><span class="s2">&quot;update1.bgp&quot;</span><span class="p">,</span>
<span class="w">        </span><span class="s2">&quot;update2.bgp&quot;</span>
<span class="w">    </span><span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Incremental updates not listed here will be loaded dynamically as soon
as referenced by the first session.</p>
</section>
<section id="bgp-raw-update-generator">
<h2>BGP RAW Update Generator<a class="headerlink" href="#bgp-raw-update-generator" title="Link to this heading"></a></h2>
<p>The BGP RAW update generator is a simple tool to generate BGP RAW update
streams for use with the BNG Blaster.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ bgpupdate --help
usage: bgpupdate [-h] [-a ASN] -n ADDRESS [-N N] -p PREFIX [-P N] [-m LABEL]
                [-M N] [-l LOCAL_PREF] [-f FILE] [-w] [-s STREAMS]
                [--stream-tx-label LABEL] [--stream-tx-inner-label LABEL]
                [--stream-rx-label LABEL] [--stream-rx-label-num N]
                [--stream-threads N] [--stream-pps N]
                [--stream-interface IFACE] [--stream-append] [--end-of-rib]
                [--append] [--pcap FILE] [--log-level {warning,info,debug}]

The BGP RAW update generator is a simple tool to generate BGP RAW update
streams for use with the BNG Blaster.

optional arguments:
-h, --help            show this help message and exit
-a ASN, --asn ASN     autonomous system number
-n ADDRESS, --next-hop-base ADDRESS
                        next-hop base address (IPv4 or IPv6)
-N N, --next-hop-num N
                        next-hop count
-p PREFIX, --prefix-base PREFIX
                        prefix base network (IPv4 or IPv6)
-P N, --prefix-num N  prefix count
-m LABEL, --label-base LABEL
                        label base
-M N, --label-num N   label count
-l LOCAL_PREF, --local-pref LOCAL_PREF
                        local preference
-f FILE, --file FILE  output file
-w, --withdraw        withdraw prefixes
-s STREAMS, --streams STREAMS
                        generate BNG Blaster traffic stream file
--stream-tx-label LABEL
                        stream TX outer label
--stream-tx-inner-label LABEL
                        stream TX inner label
--stream-rx-label LABEL
                        stream RX label
--stream-rx-label-num N
                        stream RX label count
--stream-threads N    stream TX threads
--stream-pps N        stream packets per seconds
--stream-interface IFACE
                        stream interface
--stream-append       append to stream file if exist
--end-of-rib          add end-of-rib message
--append              append to file if exist
--pcap FILE           write BGP updates to PCAP file
--log-level {warning,info,debug}
                        logging Level
</pre></div>
</div>
<p>The python BGP RAW update generator is a python script that uses
scapy to build BGP messages. Therefore this tool can be easily
modified, extend or used as a blueprint for your own tools to generate
valid BGP update streams.</p>
<p>The following example shows how to generate a BGP update stream
with IPv4 and labeled IPv6 prefixes (6PE).</p>
<ul class="simple">
<li><p>100000 x IPv4 prefixes over 1000 next-hops</p></li>
<li><p>50000 x IPv6 prefixes over 1000 next-hops with 1000 different labels (label per next-hop)</p></li>
<li><p>50000 x IPv6 prefixes over 1000 next-hops with label 2</p></li>
</ul>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -p 10.1.0.0/24 -P 100000
bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -m 20001 -M 1000 -p fc66:1::/48 -P 50000 --append
bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -m 2 -p fc66:2::/48 -P 50000 --append --end-of-rib
</pre></div>
</div>
<p>Per default, the file is replaced but the option <cite>–append</cite> allows it to append to an existing file.
The last update to a file should include the option <cite>–end-of-rib</cite> (optional).</p>
<p>The option <cite>–streams &lt;file&gt;</cite> (<cite>-s</cite>) automatically generates corresponding traffic streams
for all prefixes. Per default, this file is replaced but the option <cite>–stream-append</cite> allows
appending to an existing file.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -p 10.1.0.0/24 -P 100000 -s streams.json
bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -m 20001 -M 1000 -p fc66:1::/48 -P 50000 --append -s streams.json --stream-append
bgpupdate -f test.bgp -a 65001 -l 100 -n 10.0.0.1 -N 1000 -m 2 -p fc66:2::/48 -P 50000 --append --end-of-rib -s streams.json --stream-append
</pre></div>
</div>
<p>There are several options supported to further define the traffic streams like PPS and expected RX labels.</p>
</section>
</section>


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