Can't parse netflow by logstash codec

Elastic Stack Logstash
1

Hi everyone, I send the netflow to elasticsearch through logstash, but I found there are some fields not parsed.
this is my logstash config:

input{
        udp{
                host => "163.19.1X3.XX"
                port => 5556
                codec => netflow {
                  versions => [5,9]
                 }
        }
}
        filter{

        }
output{
elasticsearch {
                hosts => ["163.1X.16X.XX1:9200","16X.19.163.XXX:9200","163.1X.1X3.XX:9200"]

                        }
                stdout{codec=> rubydebug}
}

logsatsh warning:

[2018-02-12T15:40:13,848][WARN ][logstash.codecs.netflow  ] Can't (yet) decode flowset id 256 from source id 273, because no template to decode it with has been received. This message will usually go away after 1 minute.
[2018-02-12T15:40:13,848][WARN ][logstash.codecs.netflow  ] Can't (yet) decode flowset id 256 from source id 279, because no template to decode it with has been received. This message will usually go away after 1 minute.
[2018-02-12T15:40:13,850][WARN ][logstash.codecs.netflow  ] Can't (yet) decode flowset id 256 from source id 273, because no template to decode it with has been received. This message will usually go away after 1 minute.
[2018-02-12T15:40:13,850][WARN ][logstash.codecs.netflow  ] Can't (yet) decode flowset id 256 from source id 279, because no template to decode it with has been received. This message will usually go away after 1 minute.
[2018-02-12T15:40:13,852][WARN ][logstash.codecs.netflow  ] Can't (yet) decode flowset id 256 from source id 279, because no template to decode it with has been received. This message will usually go away after 1 minute.

this output in ES:

{
      "@version" => "1",
       "netflow" => {
          "l4_dst_port" => 21,
        "ipv4_dst_addr" => "69.239.43.79",
             "in_bytes" => 152,
          "l4_src_port" => 58001,
           "input_snmp" => 1256,
              "version" => 9,
          "output_snmp" => 1278,
         "flow_seq_num" => 2499610,
           "flowset_id" => 256,
        "ipv4_src_addr" => "120.104.245.40",
              "in_pkts" => 3,
             "protocol" => 6
    },
    "@timestamp" => 2018-02-12T07:40:18.000Z,
          "host" => "163.19.1X3.12"
}

there are some fields lost such as Last switched

the cisco switch is Netflow/IPFIX version:9

thank you in advance!

2

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