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Azure virtual network terminal access point (TAP) public preview announcement

AvirupChat's avatar
AvirupChat
Icon for Microsoft rankMicrosoft
Apr 29, 2025

We are excited to announce the public preview of Azure virtual network terminal access point (TAP).

What is virtual network TAP? Virtual network TAP allows customers continuously stream virtual machine network traffic to a network packet collector or analytics tool. Many security and performance ...
Updated Jun 23, 2025
Version 9.0
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MichaelG666's avatar
MichaelG666
Brass Contributor
May 28, 2025

AvirupChat​  We are getting this error when setting up but I don't see FastPath listed as a prerequisite to enable VTAP:

Failed to update 1 out of 1 network interface TAP configuration(s): ThenameofmyVM: Network interface /subscriptions/subscription-ID/resourceGroups/ResourceGroup/providers/Microsoft.Network/networkInterfaces/ThenameofmyVM is not on FastPath. Only FastPath network interface can be set as source of Virtual Network Tap.

AvirupChat's avatar
AvirupChat
Icon for Microsoft rankMicrosoft
May 28, 2025

Hi,

Please follow the following steps for resolving error related to fastpath:

  1. If no VTAP resource exists on the subscription of the affected VM, first create VTAP resources (Do not add the source).
  2. Once the VTAP is deployed, STOP the VM, wait for the VM to deallocate and then START the VM.
  3. You can now add the VM as a source

 

This should have been added to our support section. I will update our overview page with above. Thank you for reaching out.

  • MichaelG666's avatar
    MichaelG666
    Brass Contributor
    May 28, 2025

    AvirupChat​ 
    I did that and now I am getting a different error:

    Failed to update 1 out of 1 network interface TAP configuration(s):

    VM either has None Auxiliary Mode or None Auxiliary SKU. Only network interface which has not None Auxiliary Mode and not None Auxiliary SKU can be set as source of Virtual Network Tap.