# LogStash & Netflow : Wrong values?

**URL:** <https://discuss.elastic.co/t/logstash-netflow-wrong-values/126890>\
**Category:** Logstash\
**Created:** [April 5, 2018, 9:34am UTC](https://discuss.elastic.co/t/logstash-netflow-wrong-values/126890 "2018-04-05T09:34:13Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Julzor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/julzor/32/43931_2.png) [@Julzor](https://discuss.elastic.co/u/Julzor)\
**Post date:** [April 9, 2018, 6:07am UTC](https://discuss.elastic.co/t/logstash-netflow-wrong-values/126890/3 "2018-04-09T06:07:27Z")

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Hi,

Thank you for your reply.

Yes, this is Netflow V9.

I will look into the field you mentionned, however i made another post because i discovered that my Netflow LogStash node might drop some UDP packets 🙂

> [@Netflow Codec : UDP receive errors](https://discuss.elastic.co/t/netflow-codec-udp-receive-errors/127111):
>
> Hi, I have installed LogStash with the Netflow module to catch my flows and output them in ES and it works great, i can see my stats in Kibana without problems. I have between 5k and 12k flows/sec depending of the time of the day. A dedicated VM is doing the job with 16 CPU and 8G RAM, but i can see in Netstat that i have a lot of receiving errors : Udp: 1146481 packets received 89 packets to unknown port received. 59566 packet receive errors 475 packets sent 59566 receive buffer errors …

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