using real-time netflow analyzer with Nexus 7K

Hi All,

I read somewhere that the Nexus devices are supported in the real-time netflow analyzer. However, I can't get it to work. When using wireshark I can see the netflow packets being delivered on the correct host, but the netflow analyzer doesn't let me select any interfaces. It just says "NetFlow is not detected on the selected interface".

I'm using a Nexus 7000 as switch. I've configured it to send netflow data from one interface (as test) and it sends it via the vlan interface on which the netflow collector is also attached.

Does anybody know what I'm doing wrong?

Thanks in advance.

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  • Try posting your configure for review.

    eg

    show run netflow

  • sorry for the necro bump but i'm having a similar issue below is a copy of my config:

    flow timeout 0

    flow timeout active 64

    flow timeout inactive 32

    flow exporter Netflow-Exporter-1

      destination <Orion Server IP with Realtime Netflow>

      transport udp 2055

      source Ethernet3/6

      version 5

    flow record OrionNetFlow

      match ipv4 source address

      match ipv4 destination address

      match ip protocol

      match ip tos

      match transport source-port

      match transport destination-port

      collect counter bytes

      collect counter packets

    flow monitor NetFlow-Monitor

      description Netflow Monitor to interface

      record OrionNetFlow

      exporter Netflow-Exporter-1

  • Here's a copy of my config, I can't see your interfaces listed, check your show run netflow output again.

    flow timeout active 60
    flow exporter Solarwinds-Exporter
      destination xx.xx.xx.xx
      transport udp 2055
      source loopback0
      version 9
    flow record Solarwinds
      description Solarwinds-Flow-Record
      match ipv4 source address
      match ipv4 destination address
      match ip protocol
      collect counter bytes long
      collect flow sampler id
    sampler Solarwinds-Sample100
      mode 1 out-of 100
    flow monitor Solarwinds-Monitor
      description Solarwinds-Exporter-Record
      record netflow ipv4 original-input
      exporter Solarwinds-Exporter


    interface Ethernet4/27
      ip flow monitor Solarwinds-Monitor input sampler Solarwinds-Sample100
      ip flow monitor Solarwinds-Monitor output sampler Solarwinds-Sample100

    interface Ethernet7/26
      ip flow monitor Solarwinds-Monitor input sampler Solarwinds-Sample100
      ip flow monitor Solarwinds-Monitor output sampler Solarwinds-Sample100

    Hope this helps

  • Thanks MagicChunk I'm just trying to look at one interface in paticular below you'll find the code for that interface. Only difference i'm seeing is the sampler. Is the sampler really necessary? It wasn't on the cisco or solarwinds documentation that i read.

    interface Ethernet3/6

      speed 1000

      duplex full

      flowcontrol receive on

      flowcontrol send desired

      ip flow monitor NetFlow-Monitor input

      ip flow monitor NetFlow-Monitor output

      no shutdown

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  • Thanks MagicChunk I'm just trying to look at one interface in paticular below you'll find the code for that interface. Only difference i'm seeing is the sampler. Is the sampler really necessary? It wasn't on the cisco or solarwinds documentation that i read.

    interface Ethernet3/6

      speed 1000

      duplex full

      flowcontrol receive on

      flowcontrol send desired

      ip flow monitor NetFlow-Monitor input

      ip flow monitor NetFlow-Monitor output

      no shutdown

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