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Limiting BNG Session Volume

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  • 1.  Limiting BNG Session Volume

    Posted 09-22-2020 23:43


    in MX BNG, Is there any VSA for limiting the applicable volume to a subscriber session? For time, we can use Session-Timeout

    But I could not find any VSA for Volume.

    I saw this feature on Ericsson Redback before, Which we could Assign the applicable volume in byte for aggregation of Uploaded and Downloaded traffic or for each traffic separately

    Thank you

  • 2.  RE: Limiting BNG Session Volume

    Posted 09-23-2020 00:32

    You can use these attributes for service  to limit time/volume.

    Unisphere-Service-Volume, Unisphere-Service-Volume-Gigaword and Unisphere-Service-Timeout


    This doc for junose , but logic is same

  • 3.  RE: Limiting BNG Session Volume

    Posted 09-23-2020 00:39


    As I checked the dictionary of Freeradius, the mentioned AVPs are for "Service inside of a session", not total Session itself.

    For example: ERX-Service-Volume requires tag which implies it is related to ERX-Service-Activate AVP which it has tag as well.

    Is this assumption correct?

    Thank you


  • 4.  RE: Limiting BNG Session Volume
    Best Answer

    Posted 09-23-2020 04:42

    Hello Alireza,


    Yes, your assumption is correct. I wasn't able to find a more appropriate RADIUS attribute, but it shouldn't be difficult to accomplish your task using ERX-Service-Volume attribute.

    For example, you can configure a subscriber with a firewall filter that denies all traffic, and activate a dynamic service with firewall filter with better preference that allows everything ("any any"). ERX-Service-Volume attribute can be used to manage volume of traffic that can be consumed by this subscriber.




    Best regards,



    Please accept the solution if your problem is resolved Smiley Happy