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How can make netflow in Juniper QFX

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  • 1.  How can make netflow in Juniper QFX

    Posted 10-04-2020 12:34

    Dear All, 

     

     How can make netflow  for the following  information:

     

    Netflow Data Export enabled
    Exporting flows to 10.16.16.2 (3322)
    Exporting flows from 10.16.16.15 (61111)
    Version: 5
    Layer2 flow creation is enabled on vlan 1,108-112
    Layer2 flow export is enabled on vlan 1,180-190
    Include Filter not configured
    Exclude Filter not configured

     



  • 2.  Betreff: How can make netflow in Juniper QFX

     
    Posted 10-04-2020 12:43


  • 3.  Betreff: How can make netflow in Juniper QFX

    Posted 10-04-2020 12:50

    Thanks for reply , but still not found how can make it per vlans  other than per interfaces ??



  • 4.  Betreff: How can make netflow in Juniper QFX

     
    Posted 10-04-2020 13:03

    I suppose that you have a similar Cisco config like this:

    ip flow ingress layer2-switched vlan <vlans>
    ip flow export layer2-switched vlan <vlans>

    This is not possible with sFlow. If you have vlan interfaces (or irb interfaces, it's the same, just another name) on QFX, then you can specify these virtual interfaces. But it is not possible to specify pure vlans for layer2-switched traffic.



  • 5.  Betreff: How can make netflow in Juniper QFX
    Best Answer

     
    Posted 10-05-2020 08:21

    Hi 

     

    I am afraid that sflow does not support vlan interfaces or vlan sampling, please see this article : 

     

    reference : 

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB14855&cat=QFX_SERIES&actp=LIST

     

    NOTE: You cannot enable sFlow technology on a Layer 3 VLAN-tagged interface.
    NOTE: You cannot enable sFlow technology on a LAG interface. sFlow technology can be enabled on the member interfaces of the LAG.

     

    If this solves your problem, please mark this post as "Accepted Solution". 
    If you think that my answer was helpful, please spend some Kudos.

     

    Regards

     

    Luis Mora - JNCIS-Security

    luism@juniper.net