Hyper-V trunk mode to VM - how to target a specific virtual NIC using powershell

Question

_{Monday, March 30, 2015 10:09 AM}

Hi all

I'm having some trouble with Powershell commands that will set up vlan trunking mode to a specific VM's network adaptor, and I was wondering if you may be able to help please? I should note that what I am trying is new to me, so it's possible that I do not understand it or that what I am trying / hoping to achieve is not possible.

Essentially, I have a generation 2 VM on Hyper-V, that I need to be able to speak over 9 vlans. The maximum number of vNIC's as I understand it are 8 (whereas you can have 12 on generation 1).  The VM as it is now has 8 x vNIC's. Within the list of vlans that I need comms over, there is a range of 2214-2217.

In a lab environment, I have attempted the following command which completes successfully, but I can't see how the below is targeting or set on a specific vNIC, suggesting its global to all the vNIC's?

Set-VMNetworkAdapterVlan -VMName test1 -Trunk -AllowedVlanIdList "1-5" -NativeVlanId 6

I understand it that you must set the native vlan ID outside of what you wish that VM to access.

My problem is that I cannot get the above command to target a specific vNIC, and I am concerned that it would break all connectivity, when all I really to need to achieve is vNIC 8 speking over range 2214-2217.

Would anyone have any advice on how to get this working, or suggest a better way perhaps?

Thanks

Paul

All replies (2)

_{Monday, March 30, 2015 3:16 PM ✅Answered | 3 votes}

Hi all

I posted this question in the Hyper-V forum too, as it may have been more suitable there. Anyway, I have an answer to the problem now - it can be seen in more detail here:

https://social.technet.microsoft.com/Forums/scriptcenter/en-US/da037e5f-0d13-4ecf-9289-cfed30041c19/trunk-mode-vlan-to-a-vm-with-8-vnics-targetting-one-specific-vnic?forum=winserverhyperv

The final command that allowed me to target a specific adaptor on a VM and put it in trunk mode is below:

Get-VMNetworkAdapter -VMName <VMname here> | Where-Object -Property MacAddress -eq "<MAC address here>" | Set-VMNetworkAdapterVlan -Trunk -AllowedVlanIdList "x-x" -NativeVlanId x

(You have to set a native vlan ID, and it has to be outside of your required vlan list. The x depicts the vlan ID required and a range of vlans)

_{Tuesday, March 31, 2015 9:44 AM}

Hi Baoth,

Thanks for sharing the solution =)

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