# Can't parse netflow by logstash codec

**URL:** https://discuss.elastic.co/t/cant-parse-netflow-by-logstash-codec/119429
**Category:** Logstash
**Created:** [February 12, 2018, 8:17am UTC](https://discuss.elastic.co/t/cant-parse-netflow-by-logstash-codec/119429 "2018-02-12T08:17:32Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![f26227279](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/f26227279/32/21296_2.png) [@f26227279](https://discuss.elastic.co/u/f26227279)
#### Post date: [February 12, 2018, 8:17am UTC](https://discuss.elastic.co/t/cant-parse-netflow-by-logstash-codec/119429/1 "2018-02-12T08:17:32Z")

</div>

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!

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 12, 2018, 8:17am UTC](https://discuss.elastic.co/t/cant-parse-netflow-by-logstash-codec/119429/2 "2018-03-12T08:17:37Z")

</div>

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