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Hyper V network slowness

Hi,

I have recently put in a new Dell PowerEdge T340 running 2 Hyper V VM's. One DC & one RDP, both Server 2019.

Since installing the network has slowed down dramatically. Before they were peer to peer with 1 PC having the sales program they use.

I have searched and done all the usual stuff, VMQ off, static IP's etc but its not getting any better.

Can anyone suggest anything else to try?

Philip Elder

Dell tends to use Broadcom Gigabit NIC ports by default. Broadcom enables Virtual Machine Queues (VMQ) by default on Gigabit ports and that breaks things since VMQ belongs at the 10GbE and up level to work properly.

I have two very thorough EE articles on all things Hyper-V including how to make the necessary changes here:

Some Hyper-V Hardware and Software Best Practices
Practical Hyper-V Performance Expectations

Some PowerShell Guides:
PowerShell Guide - Standalone Hyper-V Server
PowerShell Guide - New VM PowerShell
PowerShell Guide - New-VM Template: Single VHDX File
PowerShell Guide - New-VM Template: Dual VHDX Files

Optima Systems

ASKER

Thanks for your response. I already know VMQ causes issues & this is disabled on all network adapters.

I understand there is some network slow down when using Hyper V but this has slowed the network down to barely usable.

Is there anything else you could suggest it could be?

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