anchor.diff:  each of them the tag "webservers" and then use filters and queries in the
   Kibana web interface to get visualisations for the whole group of servers.
   
  -==== Ignore outgoing
  +Example:
  +
  +[source,yaml]
  +------------------------------------------------------------------------------
  +agent:
  +  tags: ["my-service", "hardware", "test"]
  +------------------------------------------------------------------------------
  +
  +===== ignore_outgoing
   
   If the `ignore_outgoing` option is enabled, Packetbeat agent ignores all the
   transactions initiated from the server running the agent.
  
positive.code: the packet. The agent also uses the ports configured here to decide which
  parser to use for each packet.
  
  ==== Send request
  
  If the `send_request` option is enabled, the raw message of the request
  (`request` field) is sent to Elasticsearch. The default is false. This is
  useful in case you want to index the whole request. Note that for HTTP, the
  body is not included by default, only the HTTP headers.
  
  ==== Send response
  
  If the `send_response` option is enabled, the raw message of the response
  (`response` field) is sent to Elasticsearch. The default is false.  This is
  useful in case you want to index the whole request. Note that for HTTP, the
  body is not included by default, only the HTTP headers.
  
  
  ==== HTTP configuration
  
negative.code: http://packetbeat.com/blog/sniffing-performance-and-ipv6.html[blog post]
  for some details.
  
  If you use the `af_packet` sniffer, you can tune its behaviour with the
  following options:
  
  ===== buffer_size_mb
  
  This option controls the maximum size of the shared memory buffer to use
  between the kernel and user space. A bigger buffer usually results in lower CPU
  usage, but consumes more memory. This setting is only available for the
  `af_packet` sniffer type. The default is 30 MB.
  