Bridging issue solved, kind of a Late-Friday-Problem: Promiscuous mode was turned on, but on the wrong interface - the DMZ facing one.

It worked instantly the second I switched it off on the DMZ and instead turned it on on the target network interface.

How to turn on MAC spoofing / Promiscuous mode on Hyper-V using PowerShell

Get-VM -Name XXXXX | Get-VMNetworkAdapter | Where-Object { $_.MacAddress -eq "XXXXXXXX" } | Set-VMNetworkAdapter -MacAddressSpoofing On

@Dashrender said:

@johnhooks said:

@Dashrender said:

only if you are trying to monitor everything on a network connection - and that it requires the use of port mirroring on the switch to be of any use.

If you ARP spoof you don't need that.

Is this a practical troubleshooting process? Spoofing MACs?

Oh no, not practical for troubleshooting. I was just pointing out it can be done without needing access to the switch. I wasn't trying to correct you, just pointing it out for anyone else reading through.

@it-admin 4 years later, I encountered the same issue that you did.

The solution for me was do do a PCI passthrough of the physical NIC directly to the VM. This bypasses all virtual switching inside Citrix Hypervisor. I posted the exact steps to implement PCI passthrough on Citrix Hypervisor 8.2 here:

https://discussions.citrix.com/topic/414458-open-vswitch-not-passing-all-traffic-from-pif-to-vif/