What does Auxiliary Mode Enabled Network Interfaces mean?

Chris Herdt 26 Reputation points

In some of my Azure subscriptions, under "Usage + quotas", I see an entry for "Auxiliary Mode Enabled Network Interfaces" that is at capacity (2/2):


What does that mean? I tried searching the documentation but I haven't found any matches.

I did not create these Azure subscriptions or the resources in them, but I am now partly responsible for maintaining them, so I am not fully aware of the history of their configurations.

Azure Virtual Network
Azure Virtual Network
An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
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  1. GitaraniSharma-MSFT 42,421 Reputation points Microsoft Employee

    Hello @Chris Herdt ,

    Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

    I understand you see an entry for "Auxiliary Mode Enabled Network Interfaces" that is at capacity (2/2) under "Usage + quotas" in your Azure subscription and you would like to know what does this mean.

    I checked internally and found a few cases raised by other customers with the same query and below is the RCA provided by our backend team on this:

    "Customers creating and updating multiple number of network interfaces may experience a false quota exhaustion alert for "Auxillary Mode Enabled Network Interfaces". This limit is not enforced on any customer resources and is incorrectly exposed from the backend due to a bug. Therefore, it does not cause any service or deployment interruption. However, customers querying their quota may see this limit getting hit which may cause false, non actionable alerts. We are working on a fix which will roll out in ~2 months to all PROD. We sincerely apologize for the inconvenience caused."

    Kindly let us know if the above helped or you need further assistance on this issue.


    Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

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