1 Reply Latest reply on Aug 18, 2016 8:19 AM by Jesquitin

    NTA SHOW WRONG BANDWIDTH VALUE

    bordac

      Hello.

      We use SolarWinds NTA and cisco 2921.

      Netflow enable on several interfaces (LAN, tunnel, WAN).

      Cisco Netflow configuration is:

      ip flow-cache timeout active 1

      ip flow-cache timeout inactive 15

      ip flow-export source Port-channel1.100

      ip flow-export version 5

      ip flow-export destination 10.10.10.225 2055

       

      Our WAN interface throughput is 20 Mbit, but NTA shows:

      wan.JPG

      top5.JPG

       

      but, interface statistics value is correct:

      true.JPG

      Why?

       

      Here is load interface statistics in cacti:

      cacti.JPG

        • Re: NTA SHOW WRONG BANDWIDTH VALUE
          Jesquitin

          Duplicate flows will be created if both ip flow ingress and ip flow egress  are configured on multiple interfaces causing data to show double of actual bandwidth utilization. If using Flexible Netflow this would be or ip flow monitor MONITOR_NAME input and ip flow monitor MONITOR_NAME output.

           

          Take a look at the article in the link below

           

          https://support.solarwinds.com/Success_Center/Netflow_Traffic_Analyzer_(NTA)/Theory_of_Duplicate_Flows 

           

          The Top Endpoints resource shows more data by design since it shown individual Endpoints.  This is due to Endpoints from a conversation being separated and assigning the total bytes to each one,

           

          For example:

           

          The Top Endpoint resource show more data ( double if all data is displayed) by design due to Endpoint in a conversation being separated.

           

          In the  charts below you can see that the bandwidth and the total bytes are doubled.  In order for the charts to match you can either edit the Top Endpoint display as a Line Chart or ass the Top Transmitters and Top Receivers resource to the view.  This will place the End Point in their respective direction.

           

           

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