2022-03-30 23:47:00 +02:00
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Troubleshooting
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===============
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Logging
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-------
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The BNG Blaster is able to log events to the standard output
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or logging window of the interactive courses interface. Those
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events could be also logged to files using the argument
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``-L <file>``.
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Per default only events classified as `info` or `error` are logged.
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The following list shows all supported logging options.
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* ``debug``: debug events
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* ``error``: error events
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* ``igmp``: igmp events with join and leave time
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* ``io``: interface input/output events
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* ``pppoe``: pppoe events
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* ``info``: informational events (enabled per default)
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* ``pcap``: PCAP related events
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* ``timer``: timer events
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* ``timer-detail``: detailed timer events
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* ``ip``: log learned IP addresses
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* ``loss``: log traffic loss with sequence number
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* ``l2tp``: log L2TP (LNS) events
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* ``dhcp``: log DHCP events
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* ``isis``: log ISIS events
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* ``bgp``: log BGP events
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* ``tcp``: log TCP events
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.. code-block:: none
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$ sudo bngblaster -C test.json -L test.log -l ip -l isis -l bgp
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PCAP
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----
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You can start the BNG Blaster with the argument ``-P <file>``
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to capture all traffic send and received by the BNG Blaster
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into a single PCAP file. This file includes all traffic from all
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interfaces in use with proper meta header to filter by interface
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names.
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This helps to verify if traffic is received or how it has received.
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Some network interfaces drop the most outer VLAN which can be easily
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2022-04-06 23:02:38 +02:00
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verified using the capture file.
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The configuration option ``capture-include-streams`` allows to
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include (default behavior) or exclude traffic streams from capture.
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.. code-block:: json
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{
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"interfaces": {
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"capture-include-streams": false
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}
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}
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Wireshark Plugin
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~~~~~~~~~~~~~~~~
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Traffic streams generated with the BNG Blaster include the
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:ref:`BNG Blaster Header <bbl_header>` which can analyzed
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with the Wireshark BNG Blaster Header Dissector.
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Download the LUA dissector script
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`bbl_header.lua <https://github.com/rtbrick/bngblaster/tree/main/wireshark>`_
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and start wireshark as shown below from the directory where the script is placed.
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.. code-block:: none
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$ wireshark -X lua_script:bbl_header.lua
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