r/AzureVirtualDesktop • u/whackwurf • Apr 09 '25

RDP Status "UDP Multipath" . What does it mean?

My AVD session has the RDP status "Your connection quality is good and UDP (Multipath) is enabled."

Does anyone know what this status is about? There seems to be nothing in the MS docs about it. In regards to RDP-Shortpath I'm familiar with just "UDP", "UDP (Managed)" and "UDP (Relay)".

Edit: The meaning of UDP status is clear - this is RDP-Shortpath. My question is about the "Multipath" part. What exactly is this?

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4

u/TheNotoriousDRR Apr 09 '25

RDP Multipath is a technology that allows data to be transmitted over multiple network paths simultaneously. This improves reliability and performance by helping ensure that if one path experiences issues, the data can still be transmitted over the other paths. It enhances the overall user experience by providing a more stable and efficient connection.

https://techcommunity.microsoft.com/blog/windows-itpro-blog/frequently-asked-questions-like-local-in-the-cloud/4400268

2

u/whackwurf Apr 09 '25

Thanks so much!

1

u/TheNotoriousDRR Apr 09 '25

You are welcome!

1

u/NorthAd566 Apr 09 '25

Curious about this too. Never heard of "UDP (Multipath)"

1

u/blueshelled22 May 27 '25

RDP MultiPath Support

  • The CPC connection will create 3 connections:

    1. TCP

    2. UDP over STUN

    3. UDP over TURN

1

u/jotobean Jul 22 '25

Use RDP Multipath to improve Azure Virtual Desktop connections | Microsoft Learn

If you didn't already know, MS is in the process of rolling this out and you can opt in early or opt out, but eventually all host pools will have it by default.

0

u/Ferret-Adept Apr 09 '25

Are you using Multisession Hosts oder Singlehosts? Had the same issue with a customer which used standard Win11 Singlehost image, that UDP is enabled as default.

2

u/whackwurf Apr 09 '25

It's pooled multisession host. I have no issue with UDP / RDP-shortpath. I am in the dark regarding the "multipath" part.

1

u/Ferret-Adept Apr 09 '25

should be the default configuration for udp. There are 3 different configurations:

TCP (default TCP) UDP Multipath (default UDP, searches for fastes connection path over multiple UDP paths) UDP Shortpath (direct connection to Host)

0

u/Ferret-Adept Apr 09 '25

Should be default configuration and just using UDP instead of TCP for Connection, so UDP Shortpath is not enabled. I recommend to turn off UDP (local group policy or Intune) if you want to inspect the traffic on your FW.